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Hossain, Amir, Paula Senff, and Marion Glaser. "Lessons for Coastal Applications of IMTA as a Way towards Sustainable Development: A Review." Applied Sciences 12, no. 23 (November 22, 2022): 11920. http://dx.doi.org/10.3390/app122311920.
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Integrated multi-trophic aquaculture (IMTA) systems integrate the cultivation of species from different trophic levels. Uneaten feed, solid wastes, and dissolved nutrients are turned into harvestable and healthy food, making IMTA a driver for ecologically sustainable aquaculture. Its wider sustainability potentials arise from social, environmental, and economic sustainability enhancement options. Biological and economic outcomes are promising, while social equity and acceptance remain to be further investigated in the context of the long-term viability of aquaculture. Sustainable coastal and marine aquaculture development requires a holistic approach that involves social/cultural, economic, as well as environmental sustainability. This article examines IMTA as a pathway to socially, environmentally, and economically sustainable development. We collate evidence that shows that IMTA can minimize the negative environmental effects of aquaculture, assist local economies, and boost competitiveness and long-term economic viability. Available analyses of socio-economic and cost-effectiveness reveal positive prospects for IMTA systems, through product diversification, faster production cycles, and IMTA product prices and show a divergence between financial returns at the level of the entrepreneurial unit and economic returns at the macro level, which inhibits the uptake of IMTA. We conclude that the lack of governance analysis or inappropriateness of institutional development, in terms of aquaculture governance and management laws and regulations, is at the core of the hitherto weak engagement with IMTA. Unsuitable policies, regulations, and public and private sector decision policies and implementation, underlined by the scarcity of analyses of aquaculture governance institutions, are part of the reason for this. The evidence we have aggregated indicates that the relative scarcity of commercially successful coastal IMTA undertakings is not so much an intrinsic feature of the IMTA approach but is likely to have been generated by missing or inappropriate governance structures and procedures in the coastal realm.
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Radiarta, I. Nyoman, and Erlania Erlania. "PERFORMA KOMODITAS BUDIDAYA LAUT PADA SISTEM INTEGRATED MULTI-TROPHIC AQUACULTURE (IMTA) DI TELUK GERUPUK, LOMBOK TENGAH, NUSA TENGGARA BARAT." Jurnal Riset Akuakultur 11, no. 1 (October 5, 2016): 85. http://dx.doi.org/10.15578/jra.11.1.2016.85-97.
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<p>Budidaya laut berbasis Integrated Multi-Trophic Aquaculture (IMTA) merupakan opsi pengembangan budidaya perikanan yang sejalan dengan konsep pelestarian lingkungan. Tujuan penelitian ini adalah menganalisis performa komoditas budidaya laut yang pada sistem integrated multi trophic aquaculture (IMTA). Penelitian dilaksanakan di Teluk Gerupuk, Lombok Tengah, Nusa Tenggara Barat, pada bulan Juni-November 2015. Model IMTA yang dikembangkan adalah kombinasi antara ikan kerapu macan (<em>Epinephelus</em> <em>fuscoguttatus</em>), ikan bawal bintang (<em>Trachinotus blochii</em>, Lacepede), dan rumput laut (<em>Kappaphycus</em> <em>alvarezii</em>). Hasil penelitian menunjukkan bahwa selama 150 hari masa pemeliharaan ikan kerapu dan bawal bintang menghasilkan pertumbuhan yang baik, dengan rata-rata bobot akhir ikan kerapu sebesar 173,45 ± 36,61 g/ekor; dan<br />ikan bawal bintang sebesar 161,27 ± 30,05 g/ekor. Pertumbuhan rumput laut selama tiga siklus menunjukkan bahwa siklus pertama (Juni-Juli) dan siklus kedua (Agustus-September) menghasilkan pertumbuhan yang lebih baik dibandingkan dengan siklus ketiga (Oktober–November). Laju pertumbuhan harian rumput laut di sekitar keramba jarring apung (KJA) ikan sebesar 4,22%-6,09%/hari lebih tinggi dibandingkan dengan kontrol (jarak 2-3 km dari KJA ikan) yaitu 3,90%-5,53%/hari. Hasil dari penelitian ini menunjukkan efektivitas sistem IMTA dalam hal peningkatan produktivitas budidaya rumput laut. Model IMTA dapat diterapkan sebagai model pengembangan budidaya laut yang berwawasan lingkungan melalui peningkatan produksi, sistem produksi bersih, dan berkelanjutan.</p><p>Mariculture activity with Integrated Multi-Trophic Aquaculture (IMTA) is an aquaculture development technique which in line with environment conservation concept. This study was aimed to analyze perfomance of mariculture commodities that cultured under integrated multi-trophic aquaculture (IMTA) system. The study was conducted in Gerupuk Bay, Central Lombok, West Nusa Tenggara during June-November 2015. The IMTA model was combined between tiger grouper fish (Epinephelus fuscoguttatus), silver pompano fish (Trachinotus blochii, Lacepede), and seaweed (Kappaphycus alvarezii). The result showed that during 150 days of cultured periods, both of grouper and pompano indicated a good growth performance, with mean body weight at the end of culture period about 173.45 ± 36.61 g/ind. and 161.27 ± 30.05 g/ind., respectively. Seaweed growth performance from three cultivation cycles showed that cycle-1 (June- July) and cycle-2 (August-September) had better growth performance than cycle-3 (October November). Daily growth rate of seaweed that cultured near fish cages was higher (4.22%-6.09%) than control, 2-3 km distance to fish cages (3.90%-5.53%). This study indicated the effectiveness of IMTA system to increase seaweed culture production. IMTA model can be applied as development model of mariculture with environmental concept through production enhancement, zero waste production, and sustainability.</p>
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Nederlof, MAJ, J. Fang, TG Dahlgren, SPS Rastrick, AC Smaal, Ø. Strand, H. Sveier, MCJ Verdegem, and HM Jansen. "Application of polychaetes in (de)coupled integrated aquaculture: an approach for fish waste bioremediation." Aquaculture Environment Interactions 12 (September 3, 2020): 385–99. http://dx.doi.org/10.3354/aei00371.
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Development of benthic components within integrated multi-trophic aquaculture (IMTA) systems warrants more attention, and the development of polychaetes as an extractive component in IMTA systems is ongoing. This study estimates the bioremediation potential of Capitella sp. and Ophryotrocha craigsmithi for coupled and decoupled salmon-driven IMTA. In coupled IMTA, polychaetes receive fresh faeces, while in decoupled IMTA, preservation of faeces is applied. Respiration and ammonia excretion rates were measured for polychaetes fed fresh, oven-dried or acidified salmon faeces, and combined with nutrients incorporated into tissue growth, to estimate nutrient requirements. Nutrient requirements were subsequently used to evaluate bioremediation potential. Metabolic rates were highest for O. craigsmithi and contributed notably to their overall nutrient requirement (20-30%). For the 2 polychaete species, nutrient requirements ranged from 5 to 26 mg C and from 2 to 6 mg N g-1 AFDW d-1. These requirements were comparable with or higher than other polychaete species, highlighting the potential for fish waste bioremediation by Capitella sp. and O. craigsmithi. Preserved diets reduced bioremediation potential 1.5 and 3-5 times for, respectively, Capitella sp. and O. craigsmithi. Assuming that polychaetes are efficient fish-faeces convertors, the bioremediation potential indicates that benthic cultivation units containing 65000-95000 ind. m-2 of Capitella sp. or 36000-194000 ind. m-2 of O. craigsmithi can convert the daily organic waste flux deposited below an average salmon farm. These densities were within ranges reported for wild populations, indicating that, based on the bioremediation potential, development of benthic IMTA with these 2 polychaete species seems realistic and efficient for waste conversion.
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Resende, Luís, Juan Flores, Cláudia Moreira, Diana Pacheco, Alexandra Baeta, Ana Carla Garcia, and Ana Cristina Silva Rocha. "Effective and Low-Maintenance IMTA System as Effluent Treatment Unit for Promoting Sustainability in Coastal Aquaculture." Applied Sciences 12, no. 1 (December 31, 2021): 398. http://dx.doi.org/10.3390/app12010398.
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Integrated multitrophic aquaculture (IMTA) is a versatile technology emerging as an ecological and sustainable solution for traditional monoculture aquacultures in terms of effluent treatment. Nevertheless, IMTA is still poorly applied in aquaculture industry due to, among other reasons, the lack of effective, low-investment and low-maintenance solutions. In this study, one has developed a practical and low maintenance IMTA-pilot system, settled in a semi-intensive coastal aquaculture. The optimisation and performance of the system was validated using Ulva spp., a macroalgae that naturally grows in the fishponds of the local aquaculture. Several cultivation experiments were performed at lab-scale and in the IMTA-pilot system, in static mode. The specific growth rate (SGR), yield, nutrient removal, N and C enrichment, protein and pigment content were monitored. Ulva spp. successfully thrived in effluent from the fish species sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax) production tanks and significantly reduced inorganic nutrient load in the effluent, particularly, NH4+, PO43− and NO3−. The enrichment of nitrogen in Ulva spp.’s tissues indicated nitrogen assimilation by the algae, though, the cultivated Ulva spp. showed lower amounts of protein and pigments in comparison to the wild type. This study indicates that the designed IMTA-pilot system is an efficient solution for fish effluent treatment and Ulva spp., a suitable effluent remediator.
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Nurfadillah, Nurfadillah, Iwan Hasri, Muhammad Reza Purnama, Adrian Damora, and Siska Mellisa. "The application of integrated multi-trophic aquaculture (IMTA) using floating net cages on Tilapia fish with native fish (Peres, Lemeduk, and Depik)." Depik 10, no. 3 (November 18, 2021): 219–24. http://dx.doi.org/10.13170/depik.10.3.22465.
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Environmental problems due to aquaculture occur along with the increase in aquaculture production. IMTA is one system used as a solution in dealing with environmental problems. The objective of this study was to analyze the growth performance, survival rate, and production of the main commodity (tilapia) and the supporting commodities (Peres, Lemeduk, and Depik) which are applied through the application of integrated multi-trophic aquaculture (IMTA) using floating net cages. This research was conducted at the Lukup Badak Fish Seed Center, Central Aceh from July to August 2020. The experimental design used was a completely randomized design (CRD) with 4 treatments and 3 replications, namely: A (tilapia), B (tilapia and peres), C (tilapia and lemeduk), and D (tilapia and depik). ANOVA test results showed that the IMTA system had a significant effect on absolute length growth, absolute weight growth, specific growth rate (SGR), survival rate, and biomass production of tilapia (P0.05). The results showed that maintenance for 42 days produced the highest value in treatment B with the increase in absolute length growth (4.26cm±0.24); absolute weight growth (5.47g±0.45), specific daily growth rate (2.28%/day±0.13) and the highest tilapia biomass production (480g/0.5m2±19.25). The highest survival rate was found in treatment C (82.42%±2.28). It was concluded that the treatment using the IMTA system was better than without the IMTA system.Keywords:IMTAWater qualityGrowth performanceTrophic interactionBiomass production
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Bouwmans, Clazien, Marieke Krol, Hans Severens, Marc Koopmanschap, Werner Brouwer, and Leona Hakkaart-van Roijen. "The iMTA Productivity Cost Questionnaire." Value in Health 18, no. 6 (September 2015): 753–58. http://dx.doi.org/10.1016/j.jval.2015.05.009.
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Bouwmans, C., M. Krol, W. Brouwer, J. L. Severens, M. A. Koopmanschap, and L. Hakkaart. "IMTA Productivity Cost Questionnaire (IPCQ)." Value in Health 17, no. 7 (November 2014): A550. http://dx.doi.org/10.1016/j.jval.2014.08.1791.
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Anggorowati, D. A., and H. Munandar. "Diversity and fluctuation of cultivable Vibrio bacteria populations in an integrated multi-trophic aquaculture (IMTA) system of Holothuria scabra, Chanos chanos and Gracillaria sp." IOP Conference Series: Earth and Environmental Science 967, no. 1 (January 1, 2022): 012008. http://dx.doi.org/10.1088/1755-1315/967/1/012008.
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Abstract Sea cucumber is one of the vital aquaculture commodities in the global market. Progressive demand and limiting the supply of sea cucumber from natural sources drove sea cucumber aquaculture development. An integrated multi-trophic aquaculture system (IMTA) was a polyculture system in aquaculture to improve production by promoting nutrient utilisation through different tropical levels. This system combined sea cucumber (Holothuria scabra), milkfish (Chanos chanos), and seaweed (Gracillaria sp.) in a rearing tank system. Several factors affect the success of IMTA processes, including microorganisms. Microorganisms in the aquaculture environment play a crucial role in elements cycling, energy flow and farmed-species health. Diseases caused by the bacteria, mainly from the Vibrionaceae family, were often chronic than acute and may cause a high mortality percentage. This study aimed to investigate the Vibrio bacterial diversity and fluctuation in the water of IMTA rearing tanks. The result indicated that the Vibrio bacterial diversity from the polyculture system (IMTA) was generally higher than the monoculture system. Vibrio bacteria populations from different culture systems have been found to consist of varied bacterial species. However, the predominant species was the same. The polyculture system is suggested as a sustainable and eco-friendly culture system.
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Nasti, Diana, S. Sunarno, and Sapto Purnomo Putro. "Analisa Hubungan Panjang dengan Berat Ikan Bawal Bintang (Trachinotus Blochii, Lacepede) Pada Sistem Keramba Jaring Apung (KJA) Integrated Multi Trophic Aquaculture (IMTA) di Kawasan Sea Farming Kepulauan Seribu." Bioma : Berkala Ilmiah Biologi 19, no. 1 (July 13, 2017): 1. http://dx.doi.org/10.14710/bioma.19.1.1-4.
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Tujuan penelitian ini adalah menganalisa hubungan panjang dan berat ikan bawal bintang (Trachinotus blochii) pada sistem keramba jaring apung (KJA) Integrated multi trophic aquaculture (IMTA) dan Monokultur. Keramba jaring apung IMTA diaplikasikan pada Stratified double net cage (SDNC). Penelitian ini dilakukan di kawasan Sea Farming Karang Lebar kepulauan Seribu, di dua lokasi yaitu : lokasi A adalah kawasan budidaya sistem IMTA dengan jenis biota ikan bawal bintang (Trachinotus blochii) dan ikan kerapu macan (Epinephelus fuscoguttatus,Forsskal). Lokasi B adalah kawasan budidaya monokultur dengan jenis biota bawal bintang (Trachinotus Blochii). Hasil penelitian analisa hubungan panjang dan berat ikan di kedua lokasi menunjukan pola alometrik positif b > 3, dan berdasarkan kondisi fisik dan kimia perairan laut dari kedua lokasi penelitian terdapat perbedaan namun, secara umum masih menunjukkan dalam kisaran normal yaitu konduktivitas berkisar antara 4,53 – 5,05 mS/cm, kecerahan berkisar antara 23,21 – 25,50 mg/l, turbiditas berkisar antara 19,89 – 27,00 mg/l, Dissolved Oxygen (DO) berkisar pada 6,09 – 7,50 mg/L, salinitas berkisar antara 25,09 – 32,37ppt, pH berkisar antara 7,21 – 7,96 dan temperatur berkisar antara 29,33 – 31,40 oC. Kata kunci : Bawal bintang (Trachinotus blochii), IMTA, Monokultur, pola pertumbuhan
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Dewi, Asriani Atika, Sri Rejeki, and Titik Susilowati. "PENGARUH KEPADATAN UDANG WINDU YANG BERBEDA PADA KONSEP IMTA (INTEGRATED MULTITROPHIC AQUACULTURE) TERHADAP RASIO C/N DALAM MEDIA AIR BUDIDAYA." Sains Akuakultur Tropis 4, no. 2 (October 1, 2020): 148–55. http://dx.doi.org/10.14710/sat.v4i2.6876.
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Budidaya udang windu dengan sistem IMTA yaitu mengkombinasikan dua atau tiga komoditas budidaya, dimana limbah nutrisi/pakan dari hewan tingkat tinggi dikonsumsi oleh hewan tingkat rendah. Budidaya sistem IMTA saat ini belum banyak diketahui nilai C/N dalam memenuhi persyaratan yang optimal. Bakteri heterotrof di perairan akan tumbuh dengan baik apabila rasio C/N bernilai 10 atau lebih. Oleh karena itu, perlu dilakukan analisis rasio C/N dalam air pada budidaya dengan sistem IMTA (Integrated Multitrophic Aquaculture). Penelitian ini bertujuan untuk mengetahui pengaruh kepadatan udang windu terhadap rasio C/N dalam air dan mengetahui kepadatan udang windu yang optimal untuk menghasilkan rasio C/N pada lingkungan budidaya. Udang windu dengan stadia PL-30 (0.092±0,84 cm) dibudidayakan pada sistem IMTA dengan menggunakan ikan nila dengan kepadatan 20 ekor/m3 (0.69±0,3 cm), rumput laut dengan kepadatan 100 g/m2 dan kerang hijau dengan kepadatan 90 g/m2 (3,32±0,79 cm). Pakan udang windu yang digunakan memiliki kandungan protein 40% dengan metode pemberian pakan secara fix feeding rate. Pakan ikan nila yang digunakan memiliki kandungan protein 30% dengan metode pemberian pakan yang diberikan secara ad satiation. Wadah yang digunakan adalah menggunakan bak fiber dengan ukuran panjang 1 m2dan lebar 1 m2dan kedalaman air 0,7 m2. Media yang digunakan untuk membuat sebuah ekosistem yang menyerupai ekosistem tambak ditambahkan substrat berupa pasir berlumpur. Substrat berupa lumpur berpasir mengacu pada penelitian. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) 4 perlakuan dan 3 ulangan. Kepadatan yang digunakan yaitu perlakuan A (tanpa udang), B (60), C (80), dan D (100). Data yang diamati adalah rasio C/N, laju pertumbuhan spesifik (SGR) dan kelulushidupan (SR). Hasil penelitian menunjukkan bahwa kepadatan udang windu yang berbeda pada sistem IMTA berpengaruh (P<0,05) terhadap kelulushidupan tetapi tidak berpengaruh terhadap rasio C/N dan laju pertumbuhan spesifik. Perlakuan kepadatan udang windu 60, 80 dan 100 ekor mempunyai hasil rasio C/N yang baik dalam persyaratan rasio C/N air.Kata Kunci : IMTA, Kepadatan, Rasio C/N, Udang windu.
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Alamrousi, Ahmed, Eduardo Casais, Érika García-Cardesín, Ingrid Masaló, José Pintado, and Javier Cremades. "Influence of pH, N, P, N: P Ratio, and Dissolved Inorganic Carbon on Ulva ohnoi Growth and Biomass Quality: Potential Implications in IMTA-RAS." Aquaculture Journal 2, no. 4 (November 3, 2022): 285–301. http://dx.doi.org/10.3390/aquacj2040017.
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Ulva ohnoi has a big potential in IMTA-RAS fish–seaweed systems. In order to design the best production strategy in these systems, the effect of the main environmental factors, such as pH, nutrient concentration (N, P, and N: P ratios) and dissolved inorganic carbon (DIC), on the productivity, bio filtration capacity, and quality of the biomass obtained was studied. It is concluded that in closed systems, strong pH variations (7.9–10.1) do not influence the growth of U. ohnoi and growth is slowed down due to the depletion of DIC. This fact would not be a problem in IMTA-RAS fish–macroalgae systems, due to the physiological activity of the fish contributing CO2 to the medium and replenishing it. The results obtained in the wide range of N: P ratios tested (2–410), allow us to conclude that this ratio should not be a limiting factor for the cultivation of Ulva ohnoi in IMTA-RAS systems. Based on those results, the best strategy to follow in an IMTA-RAS sole–sea lettuce would be to maintain the algae with highest level of nitrogen. This procedure implies a high rate of water renewal, which would also guarantee the maintenance of an adequate DIC and the best commercial quality of seaweed.
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Giangrande, Adriana, Maria Flavia Gravina, Sergio Rossi, Caterina Longo, and Cataldo Pierri. "Aquaculture and Restoration: Perspectives from Mediterranean Sea Experiences." Water 13, no. 7 (April 4, 2021): 991. http://dx.doi.org/10.3390/w13070991.
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In this paper, the different possibilities and innovations related to sustainable aquaculture in the Mediterranean area are discussed, while different maricultural methods, and the role of Integrated Multi-Trophic Aquaculture (IMTA) in supporting the exploitation of the ocean’s resources, are also reviewed. IMTA, and mariculture in general, when carefully planned, can be suitable for environmental restoration and conservation purposes. Aquaculture, especially mariculture, is a sector that is progressively increasing in parallel with the increase in human needs; however, several problems still affect its development, mainly in relation to the choice of suitable sites, fodder production, and the impact on the surrounding environment. A current challenge that requires suitable solutions is the implementation of IMTA. Unfortunately, some criticisms still affect this approach, mostly concerning the commercialization of new products such as invertebrates and seaweeds, notwithstanding their environmentally friendly character. Regarding the location of a suitable site, mariculture plans are currently displaced from inshore to offshore, with the aim of reducing the competition for space with other human activities carried out within coastal waters. Moreover, in open water, waste loading does not appear to be a problem, but high-energy waters increase maintenance costs. Some suggestions are given for developing sustainable mariculture in the Mediterranean area, where IMTA is in its infancy and where the scarce nutrients that characterize offshore waters are not suitable for the farming of both filter feeder invertebrates and macroalgae. From the perspective of coupling mariculture activity with restoration ecology, the practices suggested in this review concern the implementation of inshore IMTA, creating artificially controlled gardens, as well as offshore mussel farming coupled with artificial reefs, while also hypothesizing the possibility of the use of artificially eutrophized areas.
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Tórz, A., M. Burda, M. Półgęsek, J. Sadowski, and A. Nędzarek. "Transformation of phosphorus in an experimental integrated multitrophic aquaculture system using the media filled beds method in plant cultivation." Aquaculture Environment Interactions 14 (January 27, 2022): 1–14. http://dx.doi.org/10.3354/aei00424.
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The objective of this study was to trace the transformations of phosphorus in an integrated multitrophic aquaculture (IMTA) system and to determine whether the method of plant breeding influenced the dynamics of these changes. In the experiment, the media filled beds (MFB) method of plant cultivation was applied. Fish tanks were stocked with 200 common carp Cyprinus carpio, and hydroponic terraces were planted with 49 zantedeschia Zantedeschia sp. bulbs. Water samples were taken directly from the fish tanks immediately after each type of filtration (mechanical, biological and hydroponic). The basic forms of orthophosphates in the IMTA system included some H2PO4- ions but mostly HPO42-. The higher supply of reactive phosphorus that occurred over time in the experiment may have contributed to a decrease in calcium ion concentration due to the formation of Ca3(PO4)2 and CaHPO4 salts, thus inactivating some of the phosphorus available to plants. Phosphorus may have also been inactivated in the sediment due to the formation of Mg3(PO4)2 and MgHPO4 salts after decreasing the concentration of calcium ions as a result of their precipitation in sediments. Mineralization of organic matter took place under aerobic conditions. Organic matter was a source of biogenic substances in the IMTA system. Experimental results showed that IMTA systems have significant potential to reduce phosphorus in aquaculture wastewater and thus provide a good environment for fish farming by improving water quality.
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P. Putro, Sapto, Nuke Hawarizqi, Widowati -, and Satriyo Adhy. "UTILIZATION OF DOMINANT AND OPORTUNISTIC TAXA OF MACROBENTHIC ASSEMBLAGES INHABITING SEDIMENTS UNDER FISH FARMS FOR THE ENVIRONMENTAL STATUS ASSSESSMENT." Jurnal Teknologi 84, no. 6 (September 25, 2022): 171–79. http://dx.doi.org/10.11113/jurnalteknologi.v84.18319.
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This study aimed to analyse the environmental quality based on opportunistic taxa and dominant taxa of macrobenthic assemblages, comparing sediment under the IMTA-aquaculture and the reference site, Karimunjawa National Park. Sediments were sampled between May and October 2019, in two sampling times at the IMTA cages in which star pomfret (Trachinotus blochii) and tiger grouper (Epinephelus fuscoguttatus) were farmed with 3 stations. The reference area was located 1 km away from the fish farm zone. Transformed data of macrobenthic abundance was correlated to abiotic variables using BIO-ENV using Primer V.6.1.5 software. The dominant taxa at IMTA sites were Diala semistriata, Rissoina ambigua, Stilifer ovoideus, Acteocina fusiformis, Cerithium punctatum, Allorchestes compressa and Capitella capitata, whilst those at the reference sites were dominated by Barbatia lima, Acteocina candei, Cerithium punctatum, Owenia fusiformis, and Anaspides spinulae. Further analyses on the selected dominant and opportunistic taxa of macrobenthic assemblages between the IMTA area (M = 10.18, SE = 2.056) and the reference area (M = 3.18, SE = 0.732) still showed a significant difference (t(42) = 3.207, p = 0.003), indicating a consistency of the results of parametric statistical tests, both using the complete and the selected data set. The use of selected and dominant taxa is effective in determining environmental status and level of disturbance, and speed up the identification process and monitoring time.
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Yuniarsih, Erna, Kukuh Nirmala, and I. Nyoman Radiarta. "TINGKAT PENYERAPAN NITROGEN DAN FOSFOR PADA BUDIDAYA RUMPUT LAUT BERBASIS IMTA (INTEGRATED MULTI-TROPHIC AQUACULTURE) DI TELUK GERUPUK, LOMBOK TENGAH, NUSA TENGGARA BARAT." Jurnal Riset Akuakultur 9, no. 3 (December 30, 2014): 487. http://dx.doi.org/10.15578/jra.9.3.2014.487-500.
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Pengembangan budidaya laut berbasis IMTA (Integrated Multi-Trophic Aquaculture) merupakan suatu metode yang dirancang untuk mengatasi masalah lingkungan yang terkait dengan penggunaan pakan pada kegiatan akuakultur. Penelitian ini bertujuan untuk menganalisis tingkat penyerapan nitrogen dan fosfor pada budidaya rumput laut berbasis IMTA di Teluk Gerupuk Kabupaten Lombok Tengah. Rumput laut jenis Kappaphycus alvarezii dan Eucheuma spinosum dibudidayakan dengan metode rawai (long line). Pengamatan terhadap rumput laut dan kondisi perairan dilakukan setiap 15 hari; mulai hari ke-0 sampai hari ke-45. Hasil penelitian menunjukkan bahwa adanya perbedaan tingkat penyerapan nitrogen dan fosfor antara dua jenis rumput laut yang dibudidayakan. Total penyerapan nitrogen rumput laut K. alvarezii di lokasi IMTA mencapai 86,95 ton N/ha/tahun atau lebih tinggi 24,6% dibandingkan dengan E. spinosum yang mencapai 69,78 ton N/ha/tahun. Sedangkan untuk tingkat penyerapan fosfor, K. alvarezii mencapai 20,56 ton P/ha/tahun atau lebih tinggi 136,7% dibandingkan dengan E. spinosum yang hanya mencapai 8,69 ton P/ha/tahun. Berdasarkan luasan kawasan potensial budidaya rumput laut di Teluk Gerupuk, maka potensi penyerapan nitrogen dan fosfor untuk rumput laut K. alvarezii di kawasan ini masing-masing mencapai 27.996,93 ton N/tahun dan 6.619,16 ton P/tahun. Sedangkan untuk E. spinosum potensi penyerapan nitrogen dan fosfor masing-masing mencapai 22.470,02 ton N/tahun dan 2.796,82 ton P/tahun. Penerapan budidaya rumput laut berbasis IMTA secara jelas memberikan keuntungan ekonomi dan ekologi dengan adanya peningkatan biomassa dan perbaikan kondisi lingkungan budidaya.
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Hu, Fangyuan, Huiyan Wang, Ruihuan Tian, Jujie Gao, Guo Wu, Donghong Yin, and Chong Zhao. "A New Approach to Integrated Multi-Trophic Aquaculture System of the Sea Cucumber Apostichopus japonicus and the Sea Urchin Strongylocentrotus intermedius." Journal of Marine Science and Engineering 10, no. 12 (December 3, 2022): 1875. http://dx.doi.org/10.3390/jmse10121875.
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The sea cucumber Apostichopus japonicus and the sea urchin Strongylocentrotus intermedius are two commercially important species and are widely cultured in China. Here, a laboratory experiment was conducted for 34 days to assess whether the survival, growth and behavior performances are better in the new commercially valuable integrated multi-trophic aquaculture (IMTA) system (group M, 90 S. intermedius and 37 A. japonicus/10,638 cm3 of stocking density) than those in the control group for sea urchins (group U, 90 S. intermedius/10,638 cm3 of stocking density) and the control group for sea cucumbers (group C, 37 A. japonicus/10,638 cm3 of stocking density). We found that feeding behavior, crawling behavior, body length and body weight of sea cucumbers were significantly greater in group M than those in group C. These results suggest that the new IMTA system improves fitness-related behaviors and consequently leads to a better growth in A. japonicus while maintaining a high biomass. We further found that group M showed significantly larger body size and Aristotle’s lantern reflex as well as significantly lower mortality and morbidity in sea urchins, compared to those in group U. This suggests that the new IMTA system greatly improves feeding behavior and body growth, and survival of cultured S. intermedius. This IMTA system is a promising candidate to promote the production efficiency of juvenile A. japonicus (as primary species) and S. intermedius (as subsidiary species) in China.
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Wadud, Shaila, Ryoji Onodera, Mamun M. Or-Rashid, and Mohammad R. Amin. "Determination of Histidine and Related Compounds in Rumen Fluid by Liquid Chromatography." Journal of AOAC INTERNATIONAL 83, no. 1 (January 1, 2000): 8–15. http://dx.doi.org/10.1093/jaoac/83.1.8.
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Abstract A liquid chromatographic procedure was developed for quantitative determination of histidine (His), histidinol (HDL), histamine (HTM), urocanic acid (URA), imidazolepyruvic acid (ImPA), imidazoleacetic acid (ImAA), and imidazolelactic acid (ImLA) in rumen fluid. The method is based on direct injection analysis by UV absorbance detection at 220 nm. The separation was performed under 2 different chromatographic conditions on a LiChrospher 100 NH2 column. In the first chromatographic system, the mobile phase used for isocratic elution was 67 mM potassium phosphate buffer (monobasic and dibasic) pH 6.45–90% acetonitrile in water (21 + 79); in the second system, an acetonitrile gradient in 63 mM potassium phosphate buffer (monobasic) pH 3.0, obtained by addition of 60 mM phosphoric acid, was used. Analyses of both systems were completed within 32 and 25 min, respectively. The limits of detection of these compounds were (μM): His, 2.8; HDL, 3.7; HTM, 4.0; URA, 0.75; ImPA, 4.7; ImAA, 1.2; and ImLA, 1.3. Recovery of these compounds added to rumen fluid was 97.4–103.0% within a 1-day study and 95.4–99.0% on different day studies. Detectable levels of His were found in the deproteinized rumen fluid of goats, with average concentrations of 16.10, 10.43, 11.14, and 13.62 μM in the rumen fluid collected before the morning feeding and 2, 4, and 6 h after feeding, respectively. HDL, HTM, URA, ImPA, ImAA, and ImLA were not detected in the rumen fluid before and after feeding. Trp, Phe, and Tyr were also identified in the rumen fluid, with average concentrations of 8.25, 29.04, and 12.6 μM, respectively, before the morning feeding.
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Radiarta, I. Nyoman, Erlania Erlania, and Ketut Sugama Ketut Sugama. "ANALISIS SPASIAL DAN TEMPORAL KOMUNITAS FITOPLANKTON SEKITAR BUDIDAYA LAUT TERINTEGRASI DI TELUK EKAS, NUSA TENGGARA BARAT." Jurnal Riset Akuakultur 10, no. 2 (June 30, 2015): 283. http://dx.doi.org/10.15578/jra.10.2.2015.283-291.
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Fitoplankton merupakan trofik level paling rendah yang dapat digunakan sebagai indikasi kesuburan perairan. Penelitian ini bertujuan untuk melakukan analisis spasial dan temporal komunitas fitoplankton sekitar budidaya terintegrasi (IMTA) di Teluk Ekas, Nusa Tenggara Barat. Pengamatan lapangan dilakukan selama enam bulan mulai Juni-November 2014. Sebanyak sembilan stasiun pengamatan yang dirancang melingkar dengan jarak 60 m dan 150 m dari titik pusat IMTA (KJA ikan). Data yang dikumpulkan kemudian dianalisis secara deskriptif, indeks ekologi, dan statistik multivariat. Hasil identifikasi jenis dan kelimpahan fitoplankton menunjukkan bahwa jenis Nitzschia sp., Girosygma sp., dan Coscinodiscus sp.; dari kelas Bacillariophyceae merupakan jenis yang dominan ditemukan. Analisis indeks ekologi memberikan gambaran bahwa fitoplankton di kawasan budidaya terintegrasi memiliki indeks keanekaragaman yang rendah, indeks dominansi tergolong kategori rendah-sedang, dan indeks keseragaman yang tinggi. Kelimpahan fitoplanktonsecara spasial dan temporal menunjukkan bahwa kelimpahan yang tinggi ditemukan pada bulan Agustus-Oktober, dan secara umum tersebar pada kawasan IMTA dengan jarak 7 60 m dari KJA ikan. Karena berhubungan dengan kesuburan perairan maka kawasan ini dalam implementasinya dapat digunakan sebagai kawasan budidaya rumput laut atau kekerangan.
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Hastuti, Sri, Subandiyono Subandiyono, and Sarjito Sarjito. "PERFORMA PERTUMBUHAN IKAN LELE(Clarias gariepinus, Burchel) YANG DIBUDIDAYAKAN SECARA SUPERINTENSIF MELALUI APLIKASI SISTEM IMTA DENGAN CACING Tubifex DI BOYOLALI Growth Performances of Catfish (Clarias gariepinus, Burchel) cultivated superintensif through Application of IMTA with Tubifex worm System in Boyolali." SAINTEK PERIKANAN : Indonesian Journal of Fisheries Science and Technology 12, no. 1 (January 30, 2017): 30. http://dx.doi.org/10.14710/ijfst.12.1.30-34.
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ABSTRAK Usaha budidaya ikan di Boyolali mampu memberikan pendapatan dari usaha budidaya lele dengan hasil yang menjajikan. Usaha lele tersebut mampu memberikan kontribusi terhadap pendapatan rumah tangga sebesar 54% hingga 100%. Nilai R/C rasio lebih besar 1, yang berarti bahwa usaha tani budidaya ikan lele tersebut efisien dan layak untuk dikembangkan. Ketenaran Kabupaten Boyolali akan hasil budidaya ikan lele yang menjajikan secara ekonomi telah memacu penduduknya untuk memproduksi ikan lele.Hasil produksi ikan lele di Boyolali secara nyata dipengaruhin oleh variabel luas lahan dan variabel benih lele.Oleh karena itu, keterbatasan lahan yang dimiliki oleh para usahatani Sumber Rejeki tersebut menjadi permasalahan yang perlu dipecahkan.Untuk memaksimumkan produksi lele dengan lahan terbatas tersebut dapat dilakukan dengan teknologi IMTA (Integrated Multi TrophicAquaculture). Teknologi ini menggabung ikan lele dengan cacing tubifec, sehingga akan menghasilkan ikan lele dan tubifek.Namun kegiatan budidaya sistem IMTA yang menggabungkan antara ikan lele dengan cacing Tubifek masih tergolong belum pernah dilakuakan oleh para petani.Sistem IMTA ini memiliki beberapa kelebihan, yaitu (1) meningkatkan efisiensi input dan output yang menghasilkan kenaikan nilai ekonomis, karena dihasilkan ikan lele dan cacing tubifek. (2) memperbaiki atau meminimalisir limbah buangan kegiatan budidaya ikan, (3) meningkatkan kemanfaatan limbah kegiatan budidaya ikan yang potensial sebagai pupuk organik untuk proses produksi Tubifec. Benih lele berukuran bobot 1,5±0,1 g dipelihara dengan kepadatan 500 ekor per meter persegi. Selama pemeliharaan 3 bulan, ikan diberi pakan pelet komersial untuk lele secara ad satiationdengan frekwensi dua kali sehari. Pada bagian atas kolam dilengkapi dengan talang bertingkat sebagai tempat pemeliharaan tubifec. Air dari kolam dipompa ke atas talang atau wadah cacing tubifec. Hasil pemeliharan diperoleh ikan lele dengan pertumbuhan relatif sebesar 72,96 g% perhari dan angka kelngsungan hidup mencapai 96,66% dan nilai FCR sebesar 1. Selama satu bulan, Tubifec mengalami pertumbuhan sebesar 66,66% Kata kunci: sistem imta, lele, boyolali, efisiensi produksi ABSTRACT Fish farming in Boyolali are able to provide income from catfish culture with promising results. The catfish effort to contribute to the household income by 54% to 100%. Rated R / C ratio is greater than 1, which means that the catfish farming are efficient and feasible to develop. The Boyolali was known as location of catfish production and that will be farmed economically promising has spurred citizens to produce catfish. The production of catfish in Boyolali significantly was affectedby land area and seed catfishvariable. Therefore, the limited land owned by the farmers “Sumber Rejeki” isa problem that needs to be solved. To maximize the production of catfish with limited space can be done throughIMTAtechnology (Integrated Multi TrophicAquaculture). This technology merge catfish with tubifex worms, so it will produce catfish and tubifex. However, farming activities with IMTA system that combines catfish with worms tubifex still relatively rare by farmers. IMTA system has several advantages, (1) improve the efficiency of inputs and outputs that result in increased economic value, as produced catfish and worm tubifex. (2) correct or minimize waste from fish farming activities, (3) increase the utilization of the fish farming waste as an organic fertilizer for the tubifex production process. Sized catfish seed weight of 1.5±0.1 g maintained at densities of 500 individuals per square meter. During the three-month rearing time, fish fed a commercial pellet for catfish ad satiation with a frequency of twice a day.At the top of the catfish pondwas put the equipment with arranged adouble level drine pipe as a tubifec pond culture. The water from the catfish pond is pumped to the top drine pipe or worm tubifecrearing tank. Results of the catfish farming wtih IMTA system were relative growth rate of catfish i.e. 72.96 g% daily and survival rate reached 96.66% and FCR value is 1. During one month, tubifex grow were66.66% Keywords: IMTA system, catfish, boyolali, production efficiency
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Rey, Felisa, Paulo Cartaxana, Tânia Melo, Ricardo Calado, Rui Pereira, Helena Abreu, Pedro Domingues, Sónia Cruz, and M. Rosário Domingues. "Domesticated Populations of Codium tomentosum Display Lipid Extracts with Lower Seasonal Shifts than Conspecifics from the Wild—Relevance for Biotechnological Applications of this Green Seaweed." Marine Drugs 18, no. 4 (March 31, 2020): 188. http://dx.doi.org/10.3390/md18040188.
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In the last decades, the use of algae in biotechnology and food industries has experienced an exponential growth. Codium tomentosum is a green macroalgae with high biotechnological potential, due to its rich lipidome, although few studies have addressed it. This study aimed to investigate the seasonal changes in lipid and pigment profiles of C. tomentosum, as well as to screen its antioxidant activity, in order to evaluate its natural plasticity. Samples of C. tomentosum were collected in two different seasons, early-autumn (September/October) and spring (May), in the Portuguese coast (wild samples), and in a land-based integrated multitrophic aquaculture (IMTA) system (IMTA samples). Total lipid extracts were analysed by LC–MS, GC–MS, and HPLC, and antioxidant activity was screened through free radical scavenging potential against DPPH and 2,20-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radicals. Wild samples showed a high seasonal variability, modifying their lipidome and pigment profiles according to environmental shifts, while IMTA samples showed a relatively stable composition due to early-stage culturing in controlled conditions. The lipids that contributed the most to seasonal discrimination were glycolipids (monogalactosyl diacylglycerol - MGDG and digalactosyl diacylglycerol - DGDG) and the lyso forms of phospholipids and glycolipids. Lipid extracts showed antioxidant activity ranging from 61 ± 2 to 115 ± 35 µmol Trolox g−1 of lipid extract in DPPH assay and from 532 ± 73 to 927 ± 92 µmol Trolox g−1 of lipid extract in ABTS assay, with a more intense antioxidant activity in wild spring samples. This study revealed that wild specimens of C. tomentosum presented a higher plasticity to cope with seasonal environmental changes, adjusting their lipid, pigment, and bioactivity profiles, while IMTA samples, cultured under controlled conditions, displayed more stable lipidome and pigment compositions.
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Aguilo-Arce, Joseba, Pere Ferriol, Roberta Trani, Patrizia Puthod, Cataldo Pierri, and Caterina Longo. "Sponges as Emerging By-Product of Integrated Multitrophic Aquaculture (IMTA)." Journal of Marine Science and Engineering 11, no. 1 (January 3, 2023): 80. http://dx.doi.org/10.3390/jmse11010080.
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The use of marine sponges dates back thousands of years, and interest in these animals is increasing as new applications are discovered. Their potential is extensive, both in their ancient and still popular use as bath sponges for cosmetics and regarding the more recent discovery of bioactive secondary metabolites mainly of interest for the pharmaceutical industry and the less developed aquariology. Despite their proven biofiltration and ecosystem restoration ability and the biomass supply problem for the interested industries, few integrated multi-trophic aquaculture (IMTA) systems incorporate these invertebrates in their facilities. Therefore, in this brief review, the benefits that marine sponges could bring to rapidly growing IMTA systems are summarized, highlighting their suitability for a circular blue economy.
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Custódio, Marco, Paulo Cartaxana, Sebastián Villasante, Ricardo Calado, and Ana Isabel Lillebø. "LED Lighting and High-Density Planting Enhance the Cost-Efficiency of Halimione Portulacoides Extraction Units for Integrated Aquaculture." Applied Sciences 11, no. 11 (May 28, 2021): 4995. http://dx.doi.org/10.3390/app11114995.
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Halophytes are salt-tolerant plants that can be used to extract dissolved inorganic nutrients from saline aquaculture effluents under a production framework commonly known as Integrated Multi-Trophic Aquaculture (IMTA). Halimione portulacoides (L.) Aellen (common name: sea purslane) is an edible saltmarsh halophyte traditionally consumed by humans living near coastal wetlands and is considered a promising extractive species for IMTA. To better understand its potential for IMTA applications, the present study investigates how artificial lighting and plant density affect its productivity and capacity to extract nitrogen and phosphorous in hydroponic conditions that mimic aquaculture effluents. Plant growth was unaffected by the type of artificial lighting employed—white fluorescent lights vs. blue-white LEDs—but LED systems were more energy-efficient, with a 17% reduction in light energy costs. Considering planting density, high-density units of 220 plants m−2 produced more biomass per unit of area (54.0–56.6 g m−2 day−1) than did low-density units (110 plants m−2; 34.4–37.1 g m−2 day−1) and extracted more dissolved inorganic nitrogen and phosphorus. Overall, H. portulacoides can be easily cultivated hydroponically using nutrient-rich saline effluents, where LEDs can be employed as an alternative to fluorescent lighting and high-density planting can promote higher yields and extraction efficiencies.
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Liu, Qian, Junnan Li, Hongwei Shan, and Yicheng Xie. "Metagenomic Insights into the Structure of Microbial Communities Involved in Nitrogen Cycling in Two Integrated Multitrophic Aquaculture (IMTA) Ponds." Journal of Marine Science and Engineering 10, no. 2 (January 27, 2022): 171. http://dx.doi.org/10.3390/jmse10020171.
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The microbial structure and metabolic potential, particularly with regard to nitrogen (N) cycling, in integrated multitrophic aquaculture (IMTA) ponds with shrimp remain unclear. In this study, an analysis of microbial community taxonomic diversity and a metagenomic analysis of N-related genes were performed in a shrimp-crab pond (Penaeus japonicus-Portunus trituberculatus, SC) and a shrimp-crab-clam pond (P. japonicus-P. trituberculatus-Sinonovacula constricta, SCC) to evaluate microbial structure and N transformation capacities in these two shrimp IMTA ponds. The composition of the microbial communities was similar between SC and SCC, but the water and sediments shared few common members in either pond. The relative abundances of N cycling genes were significantly higher in sediment than in water in both SC and SCC, except for assimilatory nitrate reduction genes. The main drivers of the differences in the relative abundances of N cycling genes in SC and SCC were salinity and pH in water and the NO2− and NH4+ contents of pore water in sediment. These results indicate that the coculture of S. constricta in a shrimp-crab pond may result in decreased N cycling in sediment. The reduced N flux in the shrimp IMTA ponds primarily originates within the sediment, except for assimilatory nitrate reduction.
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BUENO, PEDRO B. "Widening the Horizon of Asian Mariculture with IMTA." Journal of the Indian Society of Coastal Agricultural Research 39, no. 2 (December 31, 2021): 239. http://dx.doi.org/10.54894/jiscar.39.2.2021.110550.
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Putro, Sapto P., Jeanny Sharani, Widowati, Satriyo Adhy, and Suryono. "Biomonitoring of the Application of Monoculture and Integrated Multi-Trophic Aquaculture (IMTA) Using Macrobenthic Structures at Tembelas Island, Kepulauan Riau Province, Indonesia." Journal of Marine Science and Engineering 8, no. 11 (November 19, 2020): 942. http://dx.doi.org/10.3390/jmse8110942.
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Sustainable aquaculture needs to be considered when it comes to the utilization of water resources. The aim of this study was to apply biomonitoring using macrobenthic structures on both spatial and temporal applications of monoculture and integrated multi-trophic aquaculture (IMTA) at Tembelas Island, Kepulauan Riau Province, Indonesia. Samples of sediment were taken from three fish farm locations, namely from an IMTA site, a monoculture site, and a reference site. Macrobenthic organisms obtained through rinsing, sieving, and sorting were then identified under a stereo-microscope. Diversity of the macrobenthic assemblages was analyzed with a Shannon-Wiener index (H’). Equitability was expressed through Pielou’s evenness index. Finally, Bray-Curtis’ non-metric multi-dimensional scaling (NMDS) was used for similarities derived from log (X+1) transformed macrobenthic abundance to provide a visual representation of differences in their structure between sites over time. Results showed polychaetes exhibited differences in both variation and abundance of genera between the farm and reference site. The assemblage of macrobenthos at the IMTA site consisted of 9 genera of gastropods, 3 genera of bivalves, 5 genera of polychaetes, and 2 genera of crustaceans. At the monoculture site, 12 genera of gastropods, 4 genera of bivalves, 8 genera of polychaetes, 1 genera of crustaceans, and 1 genera of ophiuroid were observed. A relatively high abundance was observed at the reference site, with 27 genera of gastropods, 11 genera of bivalves, 3 genera of polychaetes, and 1 genera of crustacean. The favorable water conditions and possible absence of waste input from aquaculture resulting in a more suitable habitat for macrobenthic life may explain this relative abundance. Some of them were recognised as opportunistic taxa, i.e., Capitella sp., Heteromastus sp., and Lumbrinereis sp. Based on the diversity and evenness indices and the MNDS ordination, it can be concluded that the application of IMTA systems results in a suppressed or reduced potential impact on environmental disturbance due to aquacultural activities.
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de Vries, Simone, Katharina Abraham, Sylvana Magrin Sammut, Antonia Formosa, Isaac Corro Ramos, Matthijs Verteegh, Rudy Dupree, Annemieke van der Waal, Margreet Franken, and Wim Goettsch. "PP70 Enhancing HTA Processes In The Maltese System For Introducing New Medicines." International Journal of Technology Assessment in Health Care 38, S1 (December 2022): S63. http://dx.doi.org/10.1017/s0266462322002021.
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IntroductionMost European countries use Health Technology Assessment (HTA) as input for decisions on reimbursement of (new) medicines. In 2018, following the approval of European Social Funding, the Directorate for Pharmaceutical Affairs (DPA) within the Malta Ministry for Health led a specific Work Package aimed at enhancing knowledge, skills and HTA processes to inform reimbursement decisions.MethodsSince the start of the project, the Institute for Medical Technology Assessment (iMTA) and the National Health Care Institute of the Netherlands (ZIN) collaborate in providing guidance and training to DPA on relative effectiveness assessments (REAs) and pharmacoeconomic assessments (PEAs) of pharmaceuticals. Several activities were organized: site visits, face-to face interviews with stakeholders, a qualitative assessment of the core process of the Maltese system, health economics training and tutorials, meetings introducing the European Network for Health Technology Assessment (EUnetHTA) and Dutch HTA processes, development of a new framework for assessment, and a shadow assessment.ResultsOur assessment identified important methodological challenges and crucial processes interdependencies to optimize within the Maltese system. Based on the learnings, DPA created a template based on the EUnetHTA REA assessment format. IMTA created a template to perform PEAs. Currently, a shadow assessment is ongoing in which DPA performs the REA and PEA of a pharmaceutical using the new templates. ZIN and iMTA will provide feedback to DPA on several aspects, including, but not limited to, the PICO, assessment of therapeutic efficacy and safety, identifying uncertainties, input costs and effects, and formulating a clear discussion of the assessment. If necessary, the templates will be adapted during the process. The project will be evaluated and finalized in 2022.ConclusionsWith the guidance and training provided by iMTA and ZIN, DPA structured and aligned their REA and PEA to enhance their assessment process and to improve the presentation of their HTA report to the two appraisal committees. This project emphasizes the importance of international collaboration to enhance HTA processes within the
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AR, Melendres. "Growth and Absorption Response of Perna viridis (Lin, 1758) To Fish Farm Water Quality in Valladolid." Aquaculture & Fisheries 5, no. 2 (December 31, 2021): 1–10. http://dx.doi.org/10.24966/aaf-5523/100042.
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The extractive species, Perna viridis has been integrated into the existing commercial finfish culture of Chanos chanos and Trachinotus blochii in Valladolid, Carcar Bay, Eastern Cebu, Philippines, following the Integrated Multitrophic Aquaculture (IMTA) concept.
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Prabowo Wijayanto, I Nyoman Putu Budiartha, and Desak Gede Dwi Arini. "Pelaksanaan Pengawasan Pekerja Warga Negara Asing di Diprovinsi Bali." Jurnal Interpretasi Hukum 2, no. 1 (March 26, 2021): 212–17. http://dx.doi.org/10.22225/juinhum.2.1.3106.212-217.
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The large number of foreign workers working in Bali invites attention from the government to conduct measurable and directed supervision. In order to create administrative order, a regulation is made in the form of Permit to Hire Foreign Workers (IMTA). The purpose of this paper is to find out how the legal provisions and factors that occur in the implementation of supervision of foreign workers. From the facts that occur can be formulated the problem as follows: first, how is the implementation of TKA supervision by the Department of Labor of the Province of Bali? Second, what are the inhibiting factors? The method used in this paper is empirical, namely by conducting direct observations and interviews with sources in this case the related by Department of labor workers. Based on the results of research and discussion on the process of implementing labor inspections carried out by the Bali Provincial Manpower Office for companies that use foreign labor through granting permission to employ Foreign Workers (IMTA) in the Bali Provincial labor Office. The inhibiting factors include: TKA users neglect to intentionally not extend the IMTA, lack of coordination between the immigration office that issued a residence permit with the Bali Provincial Manpower Office or the Ministry of Manpower as the agency issuing permits to hire Foreign Workers, weak supervision and control by the local Provincial Manpower Office. Socialization caused by the unavailability of a budget from the Ministry of Manpower and Transmigration.
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Marques, Bruna, Elisabete Maciel, Maria Rosário Domingues, Ricardo Calado, and Ana Isabel Lillebø. "Halophyte Plants Cultured in Aquaponics Hold the Same Potential for Valorization as Wild Conspecifics from Donor Sites." Applied Sciences 11, no. 24 (December 7, 2021): 11586. http://dx.doi.org/10.3390/app112411586.
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Halophytes have gradually been introduced in marine integrated multi-trophic aquaculture (IMTA) systems due to their capacity to bioremediate nutrient-rich marine effluents and their potential use for human consumption due to their content of omega-3 and omega-6 fatty acids (FA). To foster the valorization of halophytes produced using an IMTA framework for human consumption, it is important that culture conditions keep or enhance their FA profile, when compared to that displayed by conspecifics in the wild. The main objective of the present study was to compare the FA profiles of three halophyte species (Halimione portulacoides, Salicornia ramosissima and Sarcocornia perennis) cultured in aquaponics coupled to an IMTA system with that of wild conspecifics retrieved from donor sites. The FA profiles were compared considering different plant organs (edible parts and roots) and sampling dates (spring, summer and autumn). Results show that the FA profiles of specimens cultured in aquaponics were significantly different from that of wild conspecifics, displaying a high content of omega-3 FAs in edible parts, particularly during summer, and mostly in the form of α-linolenic acid (ALA, 18:3n-3). In more detail, for the specimens cultured in aquaponics, ALA concentration in the edible parts of each species ranged from 5.10 to 7.11 μg mg−1 DW in H. portulacoides, from 5.66 to 9.19 μg mg−1 DW in S. ramosissima and from 5.49 to 7.20 μg mg−1 DW in S. perennis. Concerning the omega-6 linoleic acid (LA, 18:2n-6) identified in edible parts, the concentrations ranged from 2.25 to 2.46 μg mg−1 DW in H. portulacoides, from 3.26 to 4.84 μg mg−1 DW in S. ramosissima, and from 2.17 to 3.06 μg mg−1 DW in S. perennis. The nutritional quality was assessed through the ratio of PUFA/SFA, for both wild and cultured plants, and revealed values well above the threshold (0.45), the threshold value indicative of good nutritional quality. Overall, the culture conditions tested in the present work reinforce the potential of aquaponics coupled to marine IMTA to produce high-quality halophytes suitable for human consumption.
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Ajie, G. S., and E. Prihatiningtyas. "Nutrients removal from integrated multi-trophic aquaculture (IMTA) water using waste stabilization ponds (WSP)." IOP Conference Series: Earth and Environmental Science 976, no. 1 (February 1, 2022): 012029. http://dx.doi.org/10.1088/1755-1315/976/1/012029.
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Abstract Nutrients enrichment due to waste from Keramba Jaring Apung (KJA) aquaculture is one of the main causes of eutrophication in Indonesian Lakes and Reservoirs. Integrated multi-trophic aquaculture (IMTA) is one of environmentally friendly aquaculture that currently being developed at the Research Center (RC) for Limnology - National Research and Innovation Agency (BRIN). This aquaculture would re-use its water, along with fish waste and leftover fish pellets, to grow Duckweed (Lemna sp.) in its ponds system as additional feed. However, due to closed water recirculation in IMTA ponds system, the water quality would eventually deteriorate which would be marked with high turbidity of organic solid waste and low dissolved oxygen (DO). This study aims to improve water quality from aquacultures activity, especially in nutrients (nitrogen and phosphorus) reduction, using a constructed wetland (CW) system. This system consists of waste stabilization ponds (WSP) and compartments of CW and adsorbent. During this initial stage, IMTA water was treated in the WSP for then observed for its improvements in the nutrients and other water quality parameters. This research was conducted from July to September 2019 in the Prototype Laboratory of RC for Limnology-BRIN. Parameters of DO, conductivity, pH, oxidation reduction potential (ORP), and salinity were observed using a calibrated water quality checker (WQC) Horriba©, while nutrients parameters in the form of N-NH4, N-NO2, N-NO3, P-PO4, and dissolved organic matters (DOM) were measured in the laboratory referring to the standard method of the American Public Health Association (APHA). Results showed that average values of turbidity and electrical conductivity parameters were reduced from 102 to 76 NTU and 0.21 to 0.14 mS/cm, respectively. Average nutrients reductions were also found from N-NO2, N-NO3 and P-PO4 parameters of 85.5%, 44.3% and 37%, respectively. Significant changes were observed in parameters of DO and N-NH4. DO was increased from 4.63 mg/L to 7.44 mg/L, while N-NH4 were reduced for 81%. Even though the experiments were not conducted during low DO conditions of water from IMTA ponds, improvements from the vital water quality parameters after treatment in the WSP were observed.
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Heriansah, R. Syamsuddin, Najamuddin, and Syafiuddin. "Effect of feeding rate on growth and feed conversion ratio in the cultivation recirculation systems of multi tropic model." IOP Conference Series: Earth and Environmental Science 1119, no. 1 (December 1, 2022): 012066. http://dx.doi.org/10.1088/1755-1315/1119/1/012066.
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Abstract The effects of feeding rate (0.5%, 7.5%, and 10% body weight [BW] per day [BW day−1]) on the growth, survival rate, and feed conversion ratio of rabbit fish, Siganus guttatus, (initial BW of 2.0 ± 0.5 g, density of 16 individuals 80 L−1) were investigated in a water recirculating aquaculture system of Integrated Multi Trophic Aquaculture (IMTA model involving mussel Perna viridis, sea urchin Diadema sitosum, and seaweed Kappaphycus alvarezii. Triplicate groups of fish were fed an comercial diet (55.4% protein, 14.1% lipid) four meals a day (8 a.m, 12 a.m, 4 p.m, dan 8 p.m) for 12 weeks. Survival rate (SR), body weight gain (BWG, specific growth rate (SGR), and feed conversion ratio (FCR) significantly affected (p<0.05) by feeding rate. Experimental application of the IMTA model shows that although the amount of feed given is higher, it can produce better growth performance.
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Deng, Yale, Fan Zhou, Yunjie Ruan, Bin Ma, Xueyan Ding, Xiaomei Yue, Wenjun Ma, and Xuwang Yin. "Feed Types Driven Differentiation of Microbial Community and Functionality in Marine Integrated Multitrophic Aquaculture System." Water 12, no. 1 (December 26, 2019): 95. http://dx.doi.org/10.3390/w12010095.
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Integrated multi trophic aquaculture (IMTA) improves the production of aquatic animals by promoting nutrient utilization through different tropical levels. Microorganisms play an important role in elements cycling, energy flow and farmed-species health. The aim of this study was to evaluate how feed types, fresh frozen fish diet (FFD) or formulated diet (FD), influence the microbial community diversity and functionality in both water and sediment in a marine IMTA system. Preferable water quality, higher animal yields and higher cost efficiency were achieved in the FD pond. Feed types changed the pond bacterial community distribution, especially in the rearing water. The FFD pond was dominated with Cyanobacteria in the water, which played an important role in nitrogen fixation through photosynthesis due to the high nitrogen input of the frozen fish diet. The high carbohydrate composition in the formulated diet triggered higher metabolic pathways related to carbon and lipid metabolism in the water of the FD pond. Sediment had significantly higher microbial diversity than the rearing water. In sediment, the dominating genus, Sulfurovum and Desulfobulbus, were found to be positively correlated by network analysis, which had similar functionality in sulfur transformation. The relatively higher rates of antibiotic biosynthesis in the FFD sediment might be related to the pathogenic bacteria introduced by the trash fish diet. The difference in microbial community composition and metabolic pathways may be associated with the different pathways for nutrient cycling and animal growth performance. The formulated diet was determined to be more ecologically and economically sustainable than the frozen fish diet for marine IMTA pond systems.
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Aliah, Ratu Siti. "KERAGAAN MODEL BUDIDAYA PERIKANAN TERINTEGRASI MULTI TROPIK DI PANTAI UTARA KARAWANG, JAWA BARAT." Jurnal Teknologi Lingkungan 13, no. 1 (December 13, 2016): 47. http://dx.doi.org/10.29122/jtl.v13i1.1404.
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Teknologi budidaya perikanan terintegrasi multi tropik IMTA (Integrated Multi Tropic Aquaculture) dengan menggunakan ikan nila, udang, rumput laut dan kerang yang dipelihara dalam satu kolam telah menunjukkan produktivitas yang tinggi dan stabilitas lingkungan yang cukup baik dibandingkan dengan yang monokultur. Demikian halnya denga budidaya yang sejenis walau tidak menggunakan kerang, telah memberikan produktivitas dan kualitas air yang lebih baik. Namun demikian kualits tanah juga berpengaruh besar terhadap keberhasilan budidaya terutama untuk komoditas udang windu yang hidup di dasar. Nilai potensial redox yang negatif dapat menjadi tanda buruknya kualitas tanah untuk budidaya dan perlu di rehabilitasi. Untuk tanah seperti ini nampaknya ikan nila dan rumput laut menjadi alternatif komoditas yang cukup baikuntuk dikembangkan, karena pertumbuhannya tidak terganggu. kata kunci : Keragaan Model Budidaya Perikanan Terintegrasi Multitropik,Pantai Utara Karawang AbstractIntegrated Multi Tropic Aquaculture (IMTA) technology by using tilapia, shrimp, seaweed and shellfish that are cultured in one pond integrately have demonstrated high productivity and environmental stability compared to the monoculture. Similarly, cultivation of similar model with unusing a shell has been providing productivity andbetter water quality. However, soil quality also greatly affect on the success of farming, especially for commodity shrimp that live on the benthic. Negative redox potential value can be a sign as a poor quality of land for cultivation and needs to be rehabilitation. For this kind of soil, cultivation of tilapia and seaweed as alternative commodities is excellent to be developed, because their growth is not disturbed. key words : Performance of the Integrated Multi Tropic Aquaculture (IMTA) Model in the northern coastal area of Karawang, West Java
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Muktiniati, Muhaemi, Muhammad Junaidi, and Bagus Dwi Hari Setyono. "Nitrogen Absorption Rate in Kappaphycus alvarezii with a Longline System in the IMTA (Integrated MultiTrophic Aquaculture) Area at Ekas Bay." Jurnal Biologi Tropis 22, no. 3 (August 22, 2022): 815–23. http://dx.doi.org/10.29303/jbt.v22i3.3562.
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The rapid growth of the aquaculture sector can indirectly lead to the accumulation of unresolved aquaculture waste in the sea. The IMTA cultivation system is one of the innovations developed in aquaculture activities to overcome aquatic environmental problems, such as the accumulation of waste from feed used in aquaculture activities. The concept combines the cultivation of several species with different trophic levels, such as fish that are fed and combined with seaweed that can absorb inorganic materials in the water. The purpose of this study was to determine the level of nitrogen absorption in Kappaphycus alvarezii using a longline system in the IMTA area in the waters of Ekas Bay. This study used a Randomized Block Design (RAK) with 4 treatments and each treatment was divided into 4 groups (North, South, East, and West). The treatment given was planting seaweed at different depths, namely 50 cm, 100 cm, 150 cm, and 200 cm. The results showed that Kappaphycus alvarezii reared with an integrated cultivation system at different planting depths gave significantly different results in absolute weight growth with values ranging from 120,31 grams – 195,58 grams and specific growth rates ranging from 2.67% - 4, 35%, but did not have a significant effect on the rate of nitrogen uptake in all treatments, but the highest absorption value was at a depth of 2 meters. So the researchers suggest the cultivation of Kappaphycus alvarezii at a depth of 2 meters in the waters of Ekas Bay, East Lombok with a longline system in the IMTA area.
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Yavuzcan Yıldız, Hijran, and Serap Pulatsü. "Towards zero waste: Sustainable waste management in aquaculture." Ege Journal of Fisheries and Aquatic Sciences 39, no. 4 (December 15, 2022): 341–48. http://dx.doi.org/10.12714/egejfas.39.4.11.
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Increases in aquaculture production due to higher demand for aquatic foods result in an increase in the amount of aquaculture wastewater. This situation highlights the need for the effective treatment of wastewater in sustainable aquaculture. Today, instead of traditional physical and chemical methods in the treatment of wastewater originating from aquaculture, ecosystem-sensitive and by-product-oriented systems have begun to be adopted. The main principle of the zero-waste approach is the recycling of the nutrients in the wastewater to produce another food. In this new innovative approach, the production of other organisms from the different trophic levels using the wastewater of aquaculture in the integrated multi-trophic systems (such as aquaponics) is possible to recycle the nutrients. It has been considered the integrated multi-trophic systems (IMTA) more valuable as these systems can be used both in environment-friendly wastewater treatment and in the conversion of nutrients in wastewater to biomass. The nutrients such as nitrogen and phosphorus in aquaculture wastewater can be utilized to produce two organisms (i.e. fish+mussel) or three organisms (i.e. fish+mussel+seaweed) through IMTA. Aquaculture wastewater can be used to reduce the nutrients in constructed wetlands and plant lagoons representing the reasonable approach for sustainable aquaculture and wastewater treatment. Here, the innovative approach to sustainable aquaculture wastewater treatment was reviewed for the current and innovative technologies. It was emphasized that the need for environment-friendly wastewater treatment Technologies such as aquaponics, enlargement of constructed wetlands, or increase in using the integrated multi-trophic production systems (IMTA) in practice are recommended for sustainable aquaculture.
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Fang, J., J. Zhang, T. Xiao, D. Huang, and S. Liu. "Integrated multi-trophic aquaculture (IMTA) in Sanggou Bay, China." Aquaculture Environment Interactions 8 (April 19, 2016): 201–5. http://dx.doi.org/10.3354/aei00179.
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Radiarta, I. Nyoman, Erlania Erlania, and Ketut Sugama. "BUDIDAYA RUMPUT LAUT, Kappaphycus alvarezii SECARA TERINTEGRASI DENGAN IKAN KERAPU DI TELUK GERUPUK KABUPATEN LOMBOK TENGAH, NUSA TENGGARA BARAT." Jurnal Riset Akuakultur 9, no. 1 (March 31, 2014): 125. http://dx.doi.org/10.15578/jra.9.1.2014.125-134.
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Budidaya ikan laut dalam keramba jaring apung menghasilkan banyak sisa pakan dan feses yang dapat meningkatkan kandungan nutrien berupa nitrogen dan fosfat perairan. Pemanfaatan nutrien tersebut dapat dilakukan melalui budidaya rumput laut di sekitar keramba ikan laut. Pengamatan pertumbuhan dan laju pertumbuhan spesifik terhadap dua varietas rumput laut (Kappaphycus alvarezii var. Maumere dan Tambalang) telah dilakukan di Teluk Gerupuk, Lombok Tengah untuk satu siklus musim tanam pada bulan September-Oktober 2013. Hasil penelitian ini menunjukkan bahwa performansi pertumbuhan rumput laut yang terintegrasi dengan keramba ikan laut sangat baik. Laju pertumbuhan spesifik terbesar ditemukan pada varian Maumere yaitu berkisar antara 4,26%-4,68%/hari dibandingkan dengan varian Tambalang yaitu berkisar antara 3,90%-4,20%/hari. Secara umum melalui sistem budidaya multi-tropik terintegrasi (IMTA) ini, peningkatan produksi rumput laut dapat mencapai 74% dibandingkan dengan sistem monokultur. Model IMTA sangat relevan dengan program ekonomi biru Kementerian Kelautan dan Perikanan dalam mendukung pengembangan perikanan budidaya yang berkelanjutan.
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de Ruijter, Renée, and Harry von Piekartz. "Jubiläumskongress am 27. Januar 2018 – Ein Date mit der IMTA." physiopraxis 15, no. 11/12 (November 2017): 10–12. http://dx.doi.org/10.1055/s-0043-115365.
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Geoffrey Maitlands Behandlungsweise prägt die Physiotherapie bis heute und hat nichts an Aktualität verloren. 1992 gründete er mit von ihm ausgebildeten Instruktoren die Internationale Maitland Teacher Association (IMTA). Diese feiert am 27. Januar 2018 in Stuttgart ihr 25-jähriges Bestehen im Rahmen des physiokongresses. Es erwarten Sie zehn Vorträge von hochkarätigen Referenten.
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Zulham, Armen, Estu Sri Luhur, Joni Haryardi, and Freshty Yulia Arthatiani. "Assesment Blue Economy: Implementasi Integrated Multi-Tropic Aquaculture (IMTA) Pada Kawasan KIMBis Cakradonya Di Banda Aceh." Buletin Ilmiah Marina Sosial Ekonomi Kelautan dan Perikanan 8, no. 2 (December 30, 2013): 55. http://dx.doi.org/10.15578/marina.v8i2.3021.
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Salah satu prinsip dari ekonomi biru (blue economy) adalah memanfaatkan limbah berbagai usaha kelautan dan perikanan pada masyarakat menuju zero waste. Tiga prinsip lain yang mendukung pencapaian zero waste adalah teknologi yang digunakan harus inovatif dan adaptif, usaha tersebut harus memiliki inklusi sosial dan mampu mendorong multiplier effect yang luas dalam perekonomian. Dengan empat prinsip tersebut pada tahun 2013, KIMBis Cakradonya di Banda Aceh melakukan implementasi ekonomi biru dengan menggunakan teknologi Integrated Multitropic Aquaculture (IMTA). Teknologi ini mengutamakan budidaya kepiting soka sebagai komoditas target, diintegrasikan dengan komoditas bandeng dan rumput laut sebagai komoditas non-target. Tulisan ini bertujuan untuk memberi gambaran hasil pelaksanaan implementasi prinsip ekonomi biru dengan menggunakan teknologi IMTA. Hasil implementasi menunjukkan bahwa kondisi perairan kawasan implementasi IMTA sangat baik untuk dikembangkan budidaya kepiting soka, rumput laut dan bandeng secara terpadu. Sementara itu, data pertambahan berat kepiting soka selama 45 hari adalah: 11 gram per ekor dengan tingkat kematian 10%. Pertambahan berat rumput laut menunjukkan hasil yang sangat baik karena mengalami pertambahan 100% dibandingkan dengan berat awal penanaman. Namun, ikan bandeng tidak mengalami pertumbuhan yang cukup baik bila dibandingkan dengan pertumbuhan nener bandeng dibesarkan di kolam pada umumnya. Penerapan prinsip Blue Economy pada budidaya kepiting soka berpotensi menghasilkan limbah cangkang kepiting sekitar 1 kuintal per hektar per hari, sehingga jika usaha ini berkembang sekitar 100 hektar akan terdapat potensi limbah yang dapat dimanfaatkan sebanyak 100 kuintal per hari (10 ton). Implementasi Blue Economy ini sangat bergantung pada tingkat partisipasi para pemangku kepentingan di luar satker litbang. Oleh sebab itu, hasil kegiatan ini mengusulkan perlu dilakukan sosialisasi lanjutan kepada SKPD dan masyarakat, termasuk enterpreneur agar level partisipasi mereka dalam kegiatan KIMBis berada pada level involvement. Dengan level partisipasi tersebut maka implementasi blue economy dapat memenuhi prinsip-prinsip minimize waste, inklusi sosial, teknologi inovatif dan adaptif serta memiliki multiplier effect yang luas.
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Queirós, Ana S., Ana R. Circuncisão, Eduarda Pereira, Mónica Válega, Maria H. Abreu, Artur M. S. Silva, and Susana M. Cardoso. "Valuable Nutrients from Ulva rigida: Modulation by Seasonal and Cultivation Factors." Applied Sciences 11, no. 13 (July 1, 2021): 6137. http://dx.doi.org/10.3390/app11136137.
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Ulva macroalgae species are recognized to be an underexploited source of key nutrients, including proteins, fibers and minerals. The present work evaluated the nutritional value protein, ash, mineral composition, fat, fatty acid profile and dietary fiber of the green macroalgae Ulva rigida produced in an open land-based integrated multi-trophic aquaculture (IMTA) system, over four seasons. Overall, protein and fat content of the farmed algae ranged between 7.6 and 25.8% DW and between 0.2 and 1.3% DW, respectively, reaching the highest levels during autumn/winter seasons. In turn, total dietary fiber and ashes showed a contrary seasonal tendency, reaching maximum levels in spring (40.9–58.3% DW and 25.5–38.8% DW, respectively). Notably, the latter were particularly characterized by their richness in potassium, magnesium and iron, and a sodium/potassium ratio bellow 1.7. Variable cultivation conditions of stocking density (Sd) and flow rate (Fr) were also tested, allowing to confirm that manipulation of cultivation conditions in an IMTA system may help to improve the nutritional value of this macroalga and to boost its market value through its use as a functional food ingredient.
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van Osch, Suzanne, Stephen Hynes, Shirra Freeman, and Tim O’Higgins. "Estimating the Public’s Preferences for Sustainable Aquaculture: A Country Comparison." Sustainability 11, no. 3 (January 22, 2019): 569. http://dx.doi.org/10.3390/su11030569.
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Integrated Multi-Trophic Aquaculture (IMTA) is an alternative to the monoculture of fin fish species, in which several species are combined in the production process. This can have environmental advantages such as a lower environmental impact through nutrient cycling and natural filters; and can have economic advantages consisting of increased efficiency, product diversification and potential price premiums. In this paper, a choice experiment (CE) was conducted through an online survey in Ireland, the UK, Italy, Israel and Norway, to assess how the public makes decisions on what type of salmon or sea bream to buy based on the attributes of the product. Analysis assessed the Willingness-to-Pay (WTP) for more sustainable produced seafood using a Latent Class multinomial logit modelling approach. In the experiment, an ecolabel was used to distinguish between regularly produced (monoculture) products and sustainably produced (IMTA) products. The general public in each country showed a positive attitude towards the development of such an ecolabel and towards the payment of a price premium for the more sustainably produced salmon or sea bream.
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Hawarizqi, Nuke, Sapto P. Putro, Endah Dwi Hastuti, Muhammad Helmi, and Satriyo Adhy. "Study of organic content and grain size sediment that affect water quality in the coastal area adjacent IMTA cages of Menjangan Besar Island, Karimunjawa, Jepara." IOP Conference Series: Earth and Environmental Science 1119, no. 1 (December 1, 2022): 012030. http://dx.doi.org/10.1088/1755-1315/1119/1/012030.
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Abstract The biotic and abiotic parameters of the waters influence each other so that the life of marine biota is greatly supported by the good quality of the aquatic environment. The purpose of this research is to determine the water quality based on physicochemical parameters in the IMTA (Integrated Multi Trophic Aquaculture) cultivation area compared to the reference area which is ±1 km away on Menjangan Besar Island. The samples were taken in May and December 2019 and taken in two different locations, IMTA and the reference area. Physical and chemical parameters such as temperature, pH, salinity and DO (Dissolved Oxygen), the grain size of the substrate and the content of organic matter C-organic, N-total and phosphate. Based on KEPMEN-LH No. 51 of 2004, the parameters that exceed the threshold are temperature, DO, phosphate and pH, salinity, substrate grain size, C-organic, and N-total values are still below the threshold that supports the life of marine biota. Varied results of physicochemical parameters are influenced by seasons, household waste, and cultivation activities
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Neori, Amir, Lior Guttman, Alvaro Israel, and Muki Shpigel. "Israeli-Developed Models of Marine Integrated Multi Trophic Aquaculture (IMTA)." Journal of Coastal Research 86, sp1 (November 7, 2019): 11. http://dx.doi.org/10.2112/si86-003.1.
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Aubin, Joel. "IMTA-EFFECT - Integrated Multitrophic Aquaculture for EFFiciency and Environmental ConservaTion." Impact 2018, no. 6 (August 21, 2018): 76–78. http://dx.doi.org/10.21820/23987073.2018.6.76.
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Pantjara, Brata, Muhammad Nur Syafaat, and Anang Hari Kristanto. "EFFECT OF DYNAMICAL WATER QUALITY ON SHRIMP CULTURE IN THE INTEGRATED MULTITROPIC AQUACULTURE (IMTA)." Indonesian Aquaculture Journal 10, no. 1 (June 30, 2015): 81. http://dx.doi.org/10.15578/iaj.10.1.2015.81-90.
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One of the technologies to improve the productivity of shrimp farms are environmentally friendly shrimp farming multitrophic integrated system known as Integrated Multitrophic Aquaculture (IMTA). The aims of the study were to observe the water quality dynamic on the integrated multitrophic aquaculture and the effect on the production. This study was used four plots which each of pond had 4,000 m2 in sizing, located in experiment pond, at Research and Development Institute for Coastal Aquaculture, Maros. The main commodities used were tiger and vannamei shrimp. In the A pond was cultivated the tiger shrimp with density 12 ind./m2, in B pond was tiger shrimp with density 8 ind./m2, C pond was vannamei shrimp with density 50 ind./m2, and D pond was vannamei shrimp with density 25 ind./m2. Other commodities were red tilapia (Oreochromis niloticus). Each pond had stocking density 2,400 ind./plot which was divided into 5 hapas having a size of (6 m x 4 m x 1.2 m)/each, mangrove oysters (Crassostrea iredalei and Saccostrea cucullata) with density 7,500 ind./4,000 m2 and seaweed (Gracilaria verrucosa) of 500 kg/4,000 m2. The observation of dynamic water quality in the pond was conducted every day i.e. temperature, dissolved oxygen, salinity, and measured pH, while the total organic matter total (TOM), total ammonia nitrogen (TAN), nitrite, nitrate, phosphate were taken every two weeks. The measurements methods of water quality in laboratory was refered to APHA (2008); and Boyd (1990). During the study, absorption of N and P in seaweed were measured, the obtained plankton was identified and the ratio of carbon and nitrogen during the observation was also calculated. To determine the effect of dominant water quality on production was used the principal component analysis (PCA). The result showed that water quality during the study was suitable for shrimp and red tilapia culture. The dominant water qualities which effected the shrimp production in IMTA system were total ammonia nitrogen (TAN), oxygen, total organic matter (TOM), phosphate, and salinity. The survival rate of the tiger shrimp in intensive pond and semi intensive pond was 50.68% and 59.28% respectively, while the survival rate of the vannamei shrimp in intensive and semi intensive was 71.26% and 68.06% respectively. The highest shrimp production in the cultivation of IMTA reached was 1,488 kg/pond (3,720 kg/ha) in C pond. The lowest feed conversion ratio (FCR) was obtained in the D pond (0.89). The highest production of red tilapia in IMTA reached in C pond (426.65 kg/pond).
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Baltadakis, A., J. Casserly, L. Falconer, M. Sprague, and TC Telfer. "European lobsters utilise Atlantic salmon wastes in coastal integrated multi-trophic aquaculture systems." Aquaculture Environment Interactions 12 (November 5, 2020): 485–94. http://dx.doi.org/10.3354/aei00378.
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In this study, we investigated if juvenile European lobsters Homarus gammarus would eat waste from Atlantic salmon Salmo salar cages in a coastal integrated multi-trophic aquaculture (IMTA) setup and if there were any impacts on growth. Trophic interactions between salmon and lobsters were assessed using δ15N and δ13C stable isotope analysis and fatty acid profiling from fish feed as indicators of nutrient flow. Analysis revealed that lobsters directly utilised particulate waste from salmon production, as levels of indicator fatty acids from salmon feed were significantly higher in lobster tissues near the fish cages compared to the control site. Route of uptake may have been direct consumption of waste feed or faecal material or indirectly through fouling organisms. Stable isotope analysis did not indicate nutrient transfer to lobsters, suggesting that the duration of the study and/or the amount of waste consumed was not sufficient for stable isotope analysis. Lobsters grew significantly over the trial period at both sites, but there was no significant difference in lobster growth between the sites. Our results show a trophic relationship between salmon and lobsters within this IMTA system, with no apparent advantage or disadvantage to growth.
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Radiarta, I. Nyoman, and Erlania Erlania. "INDEKS KUALITAS AIR DAN SEBARAN NUTRIEN SEKITAR BUDIDAYA LAUT TERINTEGRASI DI PERAIRAN TELUK EKAS, NUSA TENGGARA BARAT: ASPEK PENTING BUDIDAYA RUMPUT LAUT." Jurnal Riset Akuakultur 10, no. 1 (March 31, 2015): 141. http://dx.doi.org/10.15578/jra.10.1.2015.141-152.
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Kualitas perairan merupakan salah satu aspek penting dalam perikanan budidaya. Perubahan yang terjadi pada kondisi kimia atau fisik perairan dapat menyebabkan dampak negatif terhadap pertumbuhan biota budidaya. Data kualitas air hasil program pemantauan selama enam bulan di lokasi penelitian telah dianalisis untuk melihat kisaran indeks kualitas air dan sebaran nutrien yang terjadi di sekitar unit budidaya laut terintegrasi berbasis integrated multi-trophic aquaculture (IMTA) di Teluk Ekas Provinsi Nusa Tenggara Barat. Pengamatan dilakukan pada bulan Juni-November 2014, sebanyak 13 titik pengamatan yang disebar secara diagonal dengan pusat keramba jaring apung ikan laut. Seluruh data dianalisis secara spasial dan temporal. Hasil penelitian menunjukkan bahwa nilai indeks kualitas air di lokasi penelitian tergolong kategori sedang-baik. Bulan Juli merupakan bulan dengan nilai indeks yang baik dengan kategori sedang-sangat baik (50-83); sedangkan bulan September memiliki nilai indeks yang relatif rendah dengan kategori buruk sedang (33-60). Berdasarkan sebaran nutrien (amonium, nitrat, dan orto-fosfat) menunjukkan fluktuasi secara spasial dan temporal. Konsentrasi nutrien umumnya tersedia dengan baik pada jarak 60 m dari KJA. Hasil penelitian ini dapat memberikan gambaran tentang kondisi kualitas perairan dan ketersediaan nutrien untuk mendukung pertumbuhan dan produktivitas budidaya rumput laut dengan sistem IMTA.
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Arduini, Daniele, Claudio Calabrese, Jacopo Borghese, Stefania De Domenico, Matteo Putignano, Andrea Toso, Cinzia Gravili, and Adriana Giangrande. "Perspectives for Exploitation of Sabella spallanzanii’s Biomass as a New Integrated Multi-Trophic Aquaculture (IMTA) By-Product: Feeding Trial on Amphiprion ocellaris Using Sabella Meal." Journal of Marine Science and Engineering 11, no. 1 (January 6, 2023): 123. http://dx.doi.org/10.3390/jmse11010123.
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This paper is part of a series of studies aimed at understanding the potential exploitation of the biomass of the polychaete worm Sabella spallanzanii (Gmelin, 1791), which is obtained as a by-product of an innovative Integrated Multi-Trophic Aquaculture (IMTA) system. IMTA systems are designed according to an ecosystem approach with the aim to reduce marine monoculture impact while further increasing production via exploitation of valuable by-products. S. spallanzanii can remove large amounts of suspended matter by filtering large volumes of water per hour and performs well as an extractive organism under IMTA; however, it currently lacks any economic value, thus hindering its sustainable large-scale implementation. However, S. spallazanii has the potential to become competitive as a newcomer in fish bait, as an ornamental organism, and in fish feed markets. Notably, sabella meal has already been successfully tested as an attractant in an innovative fish feed. Here, we refer to the use of sabella meal as the main component (60%) in the formulation of a novel aquarium fish feed. Following the biochemical analysis of farmed sabella meal, the experimental feed was formulated by adding spirulina (25%) and dry garlic (15%) in such proportion as to be isoproteic and isoenergetic to the commercial control feed. After preliminary observations of the palatability of sabella meal for several tropical fish species, the novel experimental feed was tested on ocellaris clownfish, Amphiprion ocellaris (Cuvier, 1830), by evaluating their growth response in a 70-day feeding trial. The fish seemed to enjoy the experimental feed at least as much as the control, and both the control and treatment groups showed no significant differences in weight gain (p = 0.46), specific growth rate (p = 0.76), and feed conversion ratio (p = 0.48), reinforcing the suitability of S. spallanzanii as a viable source of animal proteins to be employed in the fish feed industry in a circular economy perspective.
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Zhang, Meijing, Ruitong Jiang, Jianlin Zhang, Kejun Li, Jianheng Zhang, Liu Shao, Wenhui He, and Peimin He. "The Impact of IMTA on the Spatial and Temporal Distribution of the Surface Planktonic Bacteria Community in the Surrounding Sea Area of Xiasanhengshan Island of the East China Sea." Journal of Marine Science and Engineering 11, no. 3 (February 23, 2023): 476. http://dx.doi.org/10.3390/jmse11030476.
Full textAbstract:
The growing world population has produced an increasing demand for seafood, and the aquaculture industry is under corresponding pressure to fill this demand. The offshore ecology and environment are under significant threat with the continuous expansion of the scale and intensity of aquaculture. Integrated multi-tropic aquaculture (IMTA) is a healthy and sustainable mariculture model based on ecosystem-level management, and has become popular in recent years. It is an effective way to cope with the significant changes in offshore ecosystems under multiple stressors. Phytoplankton bacteria are essential to maintaining the marine ecosystem’s balance and stability. Investigating the changes in the community structure of marine planktonic bacteria can elucidate the impact of mariculture on the marine ecological environment. This study took the fish-shell IMTA system with natural macroalgae nearby as the object, and monitored the plankton community’s structure in the system’s surface seawater for four quarters from July 2020 to April 2021. The space–time distribution characteristics and influencing factors of the plankton community in the surface water were examined. The results showed no significant difference between the planktonic bacterial communities at different sampling sites. There was also no significant difference in the α-diversity index. However, the dominant species and abundance of planktonic bacteria at the sampling sites differed significantly. Proteobacteria and Bacteroides were the dominant groups of planktonic bacteria. The results of the distance-based redundancy analysis demonstrated that chemical oxygen demand, chlorophyll a, and dissolved oxygen constituted the primary environmental factors affecting the planktonic bacterial community structures. The heatmap also showed that NH4+- N, temperature, and salinity levels were also related to certain planktonic bacteria. This study preliminarily identified the distribution of the surface bacterial plankton community and its response to changes in environmental factors in the sea area near Xiasanhengshan Island. The results provide a preliminary basis for assessing the health and stability of the IMTA system in open sea areas.
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Park, Mi-Seon, Byung-Hwa Min, Young-Dae Kim, and Hyun-Il Yoo. "Biofiltration Efficiency of Saccharina japonica for Integrated Multi-Trophic Aquaculture (IMTA)." Korean Journal of Fisheries and Aquatic Sciences 45, no. 4 (August 30, 2012): 351–57. http://dx.doi.org/10.5657/kfas.2012.0351.
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