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Wungkana, Lucky, Hengky J. Sinjal, Novie P. L. Pangemanan, Sartje Lantu, Indra R. N. Salindeho y Adnan S. Wantasen. "Strategi pengembangan budidaya perairan di Kecamatan Ratahan Timur, Kabupaten Minahasa Tenggara". e-Journal BUDIDAYA PERAIRAN 10, n.º 1 (22 de julio de 2021): 31. http://dx.doi.org/10.35800/bdp.10.1.2022.35349.
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This study aimed to analyze the development of aquaculture and determine aquaculture development strategies that are in accordance with the conditions and potential of the East Ratahan District, Southeast Minahasa Regency. The methodology used was descriptive research method. The research variables observed were the potential and quality of water, land area, and information about the prospects for developing aquaculture. Data collection techniques are observation, interviews, and questionnaires. The results of the aquaculture development analysis using a SWOT analysis showed that the internal factors that influence the development of fish farming in East Ratahan consist of strength factors, namely: district government support, business location and water quality and number of fish culturists. Weakness factors were: Availability of Seeds Inadequate availability of seeds and lack of skilled culturists and lack of working capital. External factors that influenced the development of fish culturists in East Ratahan consist of opportunity factors, namely: high selling value of fish, high market share, and government policies. Threat factors were climate and holticultural crops and illegal fishing. Strategic steps for the development of fish farming businesses in East Ratahan, namely increasing the production capacity of fish aquaculture, improving and maintaining the quality of fish culture products, making agreements between fish culturists in maintaining the safety of aquaculture ponds, optimizing Fish Hatchery Centers, providing skills to fish culturists.
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Fuss, Joseph T. "Motor-Operated Valve for Fish Culturists". Progressive Fish-Culturist 50, n.º 2 (abril de 1988): 121–24. http://dx.doi.org/10.1577/1548-8640(1988)050<0121:movffc>2.3.co;2.
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Fries, Joe N. "Samcalc: A Computer Program for Fish Culturists". Progressive Fish-Culturist 56, n.º 1 (enero de 1994): 62–64. http://dx.doi.org/10.1577/1548-8640(1994)056<0062:sacpff>2.3.co;2.
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Knight, William. "Samuel Wilmot, Fish Culture, and Recreational Fisheries in late 19th century Ontario". Scientia Canadensis 30, n.º 1 (30 de junio de 2009): 75–90. http://dx.doi.org/10.7202/800527ar.
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Abstract Historians have shown that fish culturists and anglers enjoyed a mutually beneficial relationship in 19th century North America. Sharing interests in producing and protecting fish for recreation, the two groups supported emerging regimes of fisheries administration and fish culture that privileged angling and game fish species. In Ontario, it has been argued that anglers achieved control of inland fisheries with help from state fish culturist Samuel Wilmot who, as a sportsman, shared anglers' recreational perspective. A closer look at Wilmot and fish culture in late 19th century Ontario, however, reveals a more complex struggle over recreational fisheries administration. I show that game fish culture under Wilmot was subordinated to fish culture programs that supported the Great Lakes commercial fisheries. Indeed, Wilmot resisted anglers' refraining of Ontario's fisheries as a private recreational resource. By the 1890s, however, this position was unpopular with Ontario's anglers and government officials, who demanded greater provincial control over recreational fisheries and fish culture. It was only after Wilmot's retirement in 1895 that game fish culture received higher priority in Ontario with both federal and provincial governments engaging in programs of wild bass transfers. In 1899, Ontario won a share of fisheries jurisdiction and established its first provincial fisheries administration, which laid the basis for more comprehensive programs of game fish culture in the 20th century.
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Shepherd, B. G. y J. G. Morris. "A review of practical energency procedures for fish culturists". Aquacultural Engineering 6, n.º 3 (enero de 1987): 155–69. http://dx.doi.org/10.1016/0144-8609(87)90001-x.
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Farhaduzzaman, AM, Md Abdullah AI Mahamud, Shipon Das y Kamruzzaman. "Accelerating natural breeding of cuchia and creating employment opportunities of poor people through household based cuchia farming". Research in Agriculture Livestock and Fisheries 5, n.º 2 (9 de septiembre de 2018): 279–91. http://dx.doi.org/10.3329/ralf.v5i2.38118.
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Heed Bangladesh has been implementing the LIFT project titled “Accelerating natural breeding of cuchia and creating employment opportunities of poor People through household based cuchia farming” from June to mid-September 2017 in Kamolgonj upazila under Maulvibazar district. The project goal is to reduce poverty and increasing productivity and create self-employment through cuchia rearing by applying modern technology to the poor and marginal people. The initiative will implement mainly with a view to contribute in improving livelihood condition of the small holder cuchia farmers or culturists or rearers who are living in poverty due to natural disaster and climate vulnerability through increasing income. The income of targeted cuchia culturists or members will be increased through increasing productivity, improving quality and market access. Under this initiative, initially a total of 200 members will included. The project focus on building the capacity of members, local service providers, input suppliers and buyers in order to provide embedded or commercial services to the producers and enterprises that will create a competitive market. It will also engage the private and public sector to build the technical capacity of groups and link with high value market to gain a better price for their products.Res. Agric., Livest. Fish.5(2): 279-291, August 2018
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Mashaii, Nassrin, Farhad Rajabipour, Mohamad Jafari, Mohammad Mohammadi, Habib Sarsangi, Homayun Hosein-Zadeh y Abbas Matinfar. "Some Spawning Performance Parameters of Cultured Nile Tilapia Oreochromis niloticus, under Brackish Water". Aquatic Science and Technology 7, n.º 1 (21 de octubre de 2018): 8. http://dx.doi.org/10.5296/ast.v7i1.13660.
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Tilapia is one of the most important cultured fish in the world. However, the gap between seed supplies and farmers' demand is one of the serious limitations for tilapia culturists. Notice about different effective agents on tilapia reproduction might be useful for increasing of production and better management of tilapia hatcheries. In the present study, higher efficiency of tilapia Oreochromis niloticus hatchery was considered based on the impact of sex ratio, stocking density, photoperiod, water salinity and replacement period on spawning performance. Sex ratios 1:1, 1:4 and 1:7 (Male: Female), stocking densities 2, 3.5 and 5 fish/m3, photoperiods 6:18, 12:12 and 18:6 (Light:Dark), water salinities 12, 8, 4 and 0 ppt, also10 and 15 days replacement of breeders were studied. Fecundity,breeder and egg per day,spawning intervals, egg diameter and weight were investigated. Results showed stocking density 5 fish/m3, photoperiod 12:12, 8 ppt water salinity and 10 days replacement had better performance. Sex ratio treatments had similar performance.
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Xu, Wei, Charles Greg Lutz, Christopher M. Taylor y Miriam Contin Ortega. "Improvement of Fish Growth and Metabolism by Oligosaccharide Prebiotic Supplement". Aquaculture Nutrition 2022 (28 de octubre de 2022): 1–13. http://dx.doi.org/10.1155/2022/5715649.
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Finfish aquaculture is expected to continue to benefit from significantly improved fish diets, which are the source of energy to support the growth and health of fish. Strategies to enhance the transformation rate of dietary energy and protein to fish growth are greatly desired by fish culturists. Prebiotic compounds can be used as supplements to human, animal, and fish diets to populate beneficial bacteria in the gut. The goal of the present study is to identify low-cost prebiotic compounds with high efficacy in increasing the absorption of food nutrients by fish. Several oligosaccharides were evaluated as prebiotics in Nile tilapia (Oreochromis niloticus), one of the most widely cultured species in the world. Several parameters of the fish on different diets were evaluated, including feed conversion ratios (FCRs), enzymatic activities, expression of growth-related genes, and the gut microbiome. Two age groups of fish (30 days old and 90 days old) were used in this study. The results indicated that the addition of xylooligosaccharide (XOS), galactooligosaccharide (GOS), or XOS and GOS combination to the basic fish diet significantly decreased the feed conversion ratio (FCR) of the fish in both age groups. Both XOS and GOS decreased the FCR of 30-day-old fish by 34.4% compared to the fish on the control diet. In the 90-day-old fish group, XOS and GOS decreased the FCR by 11.9%, while the combination of the two prebiotics led to a 20.2% decrease in FCR compared to the control group. The application of XOS and GOS also elevated the production of glutathione-related enzymes and the enzymatic activity of glutathione peroxidase (GPX), indicating the enhancement of antioxidation processes in fish. These improvements were associated with significant changes in the fish gut microbiota. The abundance of Clostridium ruminantium, Brevinema andersonii, Shewanella amazonensis, Reyranella massiliensis, and Chitinilyticum aquatile were upregulated by XOS and GOS supplements. The findings of the present study suggested that the prebiotics would be more effective when they were applied to the younger fish, and the application of multiple oligosaccharide prebiotic compounds could result in a greater growth enhancement. The identified bacteria can be potentially used as probiotic supplements in the future to improve fish growth and feeding efficiency and ultimately reduce the cost of tilapia aquaculture.
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Mat Zain, Nur Syafiqah y Lai Kuan Lee. "Sustainable Aquaculture Technologies: Adoption Readiness, Perceived Behaviour and Determinant Barriers among the Fish Farmers in Penang, Malaysia". 14th GCBSS Proceeding 2022 14, n.º 2 (28 de diciembre de 2022): 1. http://dx.doi.org/10.35609/gcbssproceeding.2022.2(53).
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Aquaculture has been the world's fastest-growing food production sector for the last two decades. Collectively, the local aquaculture sector produced 391,000 tonnes of cultivated organisms, with an economic value of over USD 700 million, accounted about 0.2 percent of Malaysia's gross domestic product (GDP) in 2019 (Azra et al., 2021). Penang's aquaculture production gained the highest wholesale revenue in Malaysia. Brackish water ponds and cages constitute the majority of Penang's aquaculture and reported the highest number of culturists. Fisheries from brackish water have been contributing nearly 50% of the total fish production, and about 69% of its value in Penang (Penang Institute, 2020). Of these, sea bass and snapper recorded the highest production, followed by shrimp, cockle and other brackish water cages species, such as hybrid grouper and mackerel. Technology and practice adoption research has recently gained popularity in the area of aquaculture studies (Joffre et al., 2020). A variety of factors have contributed to the low output. A lack of knowledge about recommended fish farming practices is one of the socioeconomic characteristics of fish farmers and non-adoption (Muddassir et al., 2016). Lack of livelihood asset, either physical or human assets particularly in terms of knowledge, access to information, and experience, and aspects of sustainability in terms of environmental conservation. The issue of production sustainability, employment of improved technology, concept of eco-friendly, and food safety regulations are known challenges for the aquaculture industry. Furthermore, constraints such as the education and knowledge, human greed, irresponsible, short-sighted activities, small farm size and investment, uprising cost of production and weak legislation and enforcement are generally common among the aquaculture farmers (Othman, 2010). With the aforementioned, this research is aimed to access extension and advisory services, adoption of aquaculture technology, and determine the barriers that threatened the sustainability of the aquaculture industry. Keywords: Adoption; Aquaculture; Barriers; Sustainable; Technology
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Pala, Eva M. "Ultrastructural Deformities in the Scales of Cyprinus carpio Inhabiting Two Government-Sponsored Fish Farms in North-East India Contaminated by Municipal Wastes and Other Pollutants". Microscopy and Microanalysis 24, n.º 6 (6 de noviembre de 2018): 729–33. http://dx.doi.org/10.1017/s1431927618015246.
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AbstractScanning electron microscopy of the scales of Cyprinus carpio, inhabiting two government-sponsored fish farms, with different sources of pollutants, in the North-East state of Meghalaya, India revealed extensive damage to them. Lepidonts, which are teeth-like structures present on the edge of circulii, were discovered to be either partly or completely damaged. The dislodgment of complete rows of lepidonts along with broken lepidonts was also observed. Loss of symmetry and torn areas of circulii are some of the abnormalities also observed as compared to control samples. The alterations observed could be because of the high sensitivity of the scales to environmental stress and their capacity to react to low concentrations of pollutants, which makes them a sensitive bioindicator of water pollution. The study hence not only represents an advance in pollution research, by employing a highly sophisticated analytical approach to reveal the above-mentioned microstructural scale abnormalities, but it can also have scientific impact on the society at large and the fish culturist in particular in understanding the destructive impact of pollution caused by mismanagement of city garbage and agricultural effluents.
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Pontoh, Otniel. "Analisis usaha perkembangan budidaya ikan dalam jaring apung di Desa Tandengan Kabupaten Minahasa". e-Journal BUDIDAYA PERAIRAN 2, n.º 1 (25 de febrero de 2014). http://dx.doi.org/10.35800/bdp.2.1.2014.3791.
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Abstract The research aimed to study the potential of fish culture in floating net and its development at Tandengan Village Minahasa Regency. This research was a case study and the data collected was analyzed qualitatively with a simple mathematical calculations. Observation and interview to the fishermen who had floating net culture were used to gather the primary and secondary data. The results showed that education degree of fish culturist was 20% elementary school, 20% intermediate school, 60% high school, and 10% bachelor. People experience in running fish culture activity was over 10 years in average. Fish culture activities increased year by year. The problems faced by fish culturist included weather, water condition, food price, and market demand. The increase of floating net culture activities in this area had resulted in the increase of labor demand. The skill of fish culturist needed to be develop through education and training as well as through establishing fish culturists cooperation considering there were many fish culturists present at Tandengan village. This was important due to the development of floating net culture had positive impact in providing working opportunity and increasing people welfare. Keywords : Tandengan Village, case study, fish culture, floating net
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Priyadarshi, Himanshu. "Effects of a Popular Aquatic Pest Control Agent among Carp Aqua-culturists on Aquatic Microfauna Dynamics". International Journal of Agriculture Environment and Biotechnology 15, n.º 1 (23 de marzo de 2022). http://dx.doi.org/10.30954/0974-1712.01.2022.15.
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Cypermethrin is gaining popularity among fish farmers community to control aquatic insect pests and ectoparasites. Effect of cypermethrin application at farmer select dose (@0.003 ppm) on aquaculture pests (Notonecta & small prawn) commonly found in tropical ponds along with fish fry was assessed. Effect of cypermethrin application on the composition and survivability dynamics of aquatic microfauna namely rotifer, copepod and cladocera for 8 days was studied in tropical pond conditions. Cypermethrin cause significantly higher mortality to notonecta and prawn compared to fish fry within 24 h of exposure (P<0.05).
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Karim, A., B. Naila, S. Khwaja, S. I. Hussain y M. Ghafar. "Evaluation of different Starch Binders on physical quality of fish feed pellets". Brazilian Journal of Biology 84 (2024). http://dx.doi.org/10.1590/1519-6984.256242.
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Abstract Binders are the products that are used to bind, glue or hold the various feed ingredients together in order to maintain pellet integrity. For aqua-culturists, feed manufacturing is an expensive exercise due to the high cost of ingredients along with traditional artificial binders. The use of grain starches as aqua feed binders have advantages which include availability of that binder, nutritional contribution, and minimization of feed cost. A research trial was conducted to test physical properties such as palatability, water stability, dustiness, friability, settling velocity and floatation time of locally available starch i.e. wheat gluten, pea starch and guar gum and to assist their incorporation in on-farm aqua feed. Results revealed that among these three starch, the starch from pea source was proved superior over other two (wheat gluten and guar gum) as all physical quality parameters (dustiness, water stability and friability) revealed better performance of pea starch except pelletability in which guar gum performed best. Although not a single diet proved best in case of flotation time (Tf) and settling velocity (Vset) at varying lengths (6mm, 9mm and 12 mm). This finding indicates the significance of suitable binders for optimal water pollution and sustainable aquaculture. The use of these binders i.e. wheat gluten, pea starch and guar gum in fish feed pellets may also reduce dependence on synthetic binders and minimizes cost.
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Rumimpunu, Agus, Jardie A. Andaki y Victoria E. N. Manoppo. "POTENSI PENGEMBANGAN USAHA BUDIDAYA IKAN PATIN (Pangasius SP) DI DESA TATELU KABUPATEN MINAHASA UTARA". AKULTURASI (Jurnal Ilmiah Agrobisnis Perikanan) 5, n.º 9 (8 de agosto de 2017). http://dx.doi.org/10.35800/akulturasi.5.9.2017.17006.
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AbstractThe objective of this research was to study the potential business development of Channel catfish farming (Pangasius sp) in Tatelu Village North Minahasa regency. This research was a case study and the data collected was analyzed qualitatively and quantitative. Observation and interview to Tatelu village community were used to gather the primary and secondary data. The results of the research showed that the land, fries, and feed can be used for the potential businnes development of farming channel catfish in Tatelu village of North Minahasa Regency. The problems faced by fish culturist included cost, fish disease, level of community education and market demand. The skill of fish culturist needed to be develop through education , training and socialization about the benefits of fish culture. This was important due to the development of channel catfish farming had positive impact increasing people welfare. This is important because the development of channel catfish farming has a positive impact on improving people's economi Key words : channel catfish, tatelu village, business development
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Tiwari, Poonam y Mahidhar Prasad Tiwari. "Evaluation of water quality and dam for sustaining the fish population dynamics". Applied Water Science 12, n.º 9 (24 de agosto de 2022). http://dx.doi.org/10.1007/s13201-022-01728-x.
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AbstractBhagirathi is a Himalayan River, which flows in Uttrakashi district in Uttarakhand state. It is one of the most important streams of the Ganga River. This river is famous for dam construction and fisheries development. The fishes of commercial importance in cold water are Mahaseer, Snow Trout. The fish production depends on the physical, chemical as well as biological qualities of water. In the present paper, water quality evaluation and dam in the sustaining fish population dynamics have been reviewed to make aware the fish culturist and environmentalist about the water quality factors which influence health of a pond and to increase the fish yields to meet the growing demands of present time scenario of the our country. The construction of dams causes many problems. Water quality and discharge of water from the dam wall systems also indirectly affect the fish populations. In this study, we also review some of the important impacts associated with dams and their recommended mitigation measures. There is a negative impact on fish population dynamics, especially for downstream habits due to dams. Water quality is measured like temperature, turbidity, carbon dioxide, pH, alkalinity, hardness, BOD, TDS, Turbidity. The maximum oxygen content of water was recorded in January 13.02 ± 0.166 mg l−1 and minimum 9.4 ± 0.05 mg l−1 in July in site I phase I (before the reservoir dam wall). While in site II and phase I (After the dam), the maximum DO was observed in the month of January of 12.1 mg l−1 and minimum in July of 8.93 mg l−1. This is because water level is minimized in site II almost dried in winter. The CO2 of the Maneri Bhali phase I -Site I (before dam) was recorded maximum in April 3.10 ± 0.012 mg l−1. In Maneri Bhali phase I -Site II (After dam), the CO2 was recorded maximum 3.01 ± 0.003 mg l−1 in the month July. The river of Garhwal Himalaya harbors a rich aquatic diversity, the most common endemic fish species that inhabit this fresh water is the Schizothorax species. The maximum no. of fish were observed in winter and minimum in monsoon. At present, the production of these fishes from the streams is very poor and is not well managed from recreational and conservation point of view. If such is developed properly, it can have revenue potential for our state government. Sports, fisheries, tourism should be promoted.