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Journal articles on the topic 'Oreochromis niloticus'

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Published: 4 June 2021

Last updated: 15 June 2025

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Susilo, Yunus. "Efek Teknologi Lucutan Plasma Pada Organoleptik Daging Ikan Nila (Oreochromis niloticus)." Jurnal Biosains Pascasarjana 23, no. 1 (2021): 16. http://dx.doi.org/10.20473/jbp.v23i1.2021.16-27.

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AbstrakPenelitian ini bertujuan untuk mengetahui efektivitas ozon dalam menghambat kerusakan pada ikan nila (Oreochromis niloticus). Penelitian ini dilakukan dengan memberikan pemaparan ozon pada ikan nila (Oreochromis niloticus) dengan teknik pemaparan ozon melalui air dengan variasi waktu alir, yaitu 0 detik, 540 detik, 360 detik, dan 180 detik. Sampel ikan nila (Oreochromis niloticus) diperoleh dari tempat budidaya ikan nila di Tanggulangin, Kota Sidoarjo. Penelitian ini dilakukan dengan teknik Rancangan Acak Lengkap (RAL). Pengamatan dilakukan setiap 12 jam sekali selama 48 jam atau 2 hari berupa pengujian organoleptik pada ikan nila (Oreochromis niloticus). Hasil uji organoleptik menunjukkan bahwa teknik paparan ozon melalui air dengan waktu alir 3 menit dalam waktu penyimpanannya selama 12 jam dengan konsentrasi ozon 0,0203 mg/L memberikan hasil yang terbaik dalam menghambat kerusakan mutu kualitas ikan nila (Oreochromis niloticus) yang ditandai dengan perubahan pada mata, insang, lendir permukaan badan, daging, bau, dan tekstur ikan nila (Oreochromis niloticus) serta spesifikasi pada ikan yang paling efektif dalam menghambat kerusakan adalah pada penampakan lendir permukaan badan dan bau pada ikan nila (Oreochromis niloticus).

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Mitra, Amlan Kumar, and Probir Bandyopadhyay. "First record of ectoparasitic African Trichodinids (Ciliophora: Peritrichida) in a cichlid fish Oreochromis mossambicus (Peters 1852) from the Churni river system, West Bengal, India." Animal Biology 56, no. 3 (2006): 323–33. http://dx.doi.org/10.1163/157075606778441912.

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AbstractOreochromis mossambicus (Peters 1852) and Oreochromis niloticus niloticus Linnaeus, 1758 are two popular freshwater fishes introduced from Africa to India. There are many records of different species of trichodinid ectoparasites infesting wild and cultured cichlids in Africa, but no such study has been conducted on this parasitic group in India. The fishes Oreochromis mossambicus and Oreochromis niloticus niloticus were investigated for the occurrence of trichodinid ciliophorans. Oreochromis mossambicus was found positive for two species, viz., Trichodina centrostrigeata Basson, Van As & Paperna, 1983 and Paratrichodina africana Kazubski & El-Tantawy, 1986. Oreochromis niloticus niloticus was found not to be infested with any species of trichodinid ciliophorans, although, interestingly, Paratrichodina africana was first discovered in this host fish. Comparative descriptions and prevalence of these two above-mentioned species are presented.

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Bezault, Etienne, Xavier Rognon, Karim Gharbi, Jean-Francois Baroiller, and Bernard Chevassus. "Microsatellites Cross-Species Amplification across Some African Cichlids." International Journal of Evolutionary Biology 2012 (June 4, 2012): 1–7. http://dx.doi.org/10.1155/2012/870935.

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The transfer of the genomic resources developed in the Nile tilapia, Oreochromis niloticus, to other Tilapiines sensu lato and African cichlid would provide new possibilities to study this amazing group from genetics, ecology, evolution, aquaculture, and conservation point of view. We tested the cross-species amplification of 32 O. niloticus microsatellite markers in a panel of 15 species from 5 different African cichlid tribes: Oreochromines (Oreochromis, Sarotherodon), Boreotilapiines (Tilapia), Chromidotilapines, Hemichromines, and Haplochromines. Amplification was successfully observed for 29 markers (91%), with a frequency of polymorphic (P95) loci per species around 70%. The mean number of alleles per locus and species was 3.2 but varied from 3.7 within Oreochromis species to 1.6 within the nontilapia species. The high level of cross-species amplification and polymorphism of the microsatellite markers tested in this study provides powerful tools for a wide range of molecular genetic studies within tilapia species as well as for other African cichlids.

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Seyoum, Seifu, and Irv Kornfield. "Taxonomic notes on the Oreochromis niloticus subspecies-complex (Pisces: Cichlidae), with a description of a new subspecies." Canadian Journal of Zoology 70, no. 11 (1992): 2161–65. http://dx.doi.org/10.1139/z92-291.

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Relationships among the seven recognized subspecies of the widespread African cichlid Oreochromis niloticus (L.) were investigated using restriction endonuclease analysis of mitochondrial DNA. Changes in nomenclature are based on estimates of sequence divergence and concordant results from phenetic, cladistic, and maximum likelihood analyses of molecular character sets. Oreochromis niloticus cancellatus and O. n. filoa are reassigned to O. cancellatus as O. c. cancellatus and O. c. filoa, respectively. The tilapiine fishes of Lake Tana, Ethiopia, previously assigned to O. n. cancellatus, are here described as Oreochromis niloticus tana subsp.nov. in recognition of their distinctive molecular phenotypes.

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Yacoub, Amal M., Soaad A. Mahmoud, and Amaal M. Abdel-Satar. "Accumulation of heavy metals in tilapia fish species and related histopathological changes in muscles, gills and liver of Oreochromis niloticus occurring in the area of Qahr El-Bahr, Lake Al-Manzalah, Egypt." Oceanological and Hydrobiological Studies 50, no. 1 (2021): 1–15. http://dx.doi.org/10.2478/oandhs-2021-0001.

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Abstract Accumulation of metals (Fe, Zn, Cu, Mn, Pb, Cd and Ni) in the muscles and gills of Oreochromis niloticus, Oreochromis aureus and Tilapia zillii was assessed based on seven locations in the Qahr El-Bahr area in Lake Al-Manzalah. The average accumulation of metals was in the following order: Tilapia zillii > Oreochromis aureus > Oreochromis niloticus. To determine the risk of fish consumption, the estimated daily intake, carcinogenic, non-carcinogenic and relative risk indices were calculated. The results indicate that the intake of individual metals through the consumption of fish is almost safe for human health, whereas the intake of combined metals poses a high potential health risk to consumers. Assessment of carcinogenic risk of Cd and Ni from the consumption of tilapia species indicates that consumers are at risk of cancer. The contribution of Pb and Cd to the overall relative risk index ranged from 34% to 41%. Of the three species studied, Oreochromis niloticus is relatively safe for consumption as it poses the least health hazard, while Tilapia zillii is more predisposed to accumulate metals in its tissues. Histopathological changes were observed in the muscles, gills and liver of Oreochromis niloticus as a result of heavy metal accumulation in these organs.

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Fonkwa, Georges, Jacques Nack, Marc Kouam K, Minette Tomedi Eyango, and Joseph Tchoumboue. "Some epidemiology aspects of Myxosporean infections in Oreochromis niloticus (Linnaeus, 1758) and Hemichromis fasciatus (Peters, 1857), two cultured Cichlid fishes in the West - Cameroon." International Journal of Aquaculture and Fishery Sciences 8, no. 1 (2022): 001–9. http://dx.doi.org/10.17352/2455-8400.000073.

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In order to assess epidemiology aspects of myxosporean infection in cultured Oreochromis niloticus and Hemichromis fasciatus fishes in Cameroon to develop efficient prevention and control program, a total of 320 Cichlid fishes (189 Oreochromis niloticus and 131 Hemichromis fasciatus) were collected from June 2019 to April 2020 in the ponds located at the Ngoundoup Village, Koutaba Subdivision, Noun Division, Region of West-Cameroon. They were examined both macroscopically and microscopically for myxosporean infections. The prevalence of infection was determined as a function of fish species, sex, size, target organs, and seasons. Results showed that kidneys and ovaries were the only infected organs and harbored nine and three myxosporean species of the genus Myxobolus respectively. A total of 154 fish were infected (54.38%). Irrespective of the parasite species, Oreochromis niloticus (75.13%) was significantly more infected than Hemichromis fasciatus (24.27%). The prevalence of parasites was very low (<25%) whatever the fish species. The sex and fish size did not significantly influence the prevalence of parasite species. The prevalence of Myxobolus tilapiae was negatively and significantly correlated (r= -0.20; p= 0.02) with Oreochromis niloticus size. The overall prevalence was significantly higher during the dry season (88.76%) than during the rainy (75.31%) and the transitional (20.29%) seasons. Oreochromis niloticus was not infected during the transitional season while Hemichromis fasciatus was more infected (p<0.001) during the dry season (26.84%) followed by the rainy (15.80%) and the transitional (10.32%) seasons. The high prevalence of myxosporeans infection may decrease the fish farming yield. The epidemiological data recorded help develop prevention and control strategies to boost the production of Oreochromis niloticus and Hemichromis fasciatus in Cameroon.

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Nwude, D. O., J. O. Babayemi, and C. P. Ajibode. "Heavy Metals Level in Clarias gariepinus (Catfish), Oreochromis niloticus (Tilapia) and Chrysichthys nigroditatus (Bagrid catfish) collected from Ogun River, Ogun State, Nigeria." Journal of Applied Sciences and Environmental Management 24, no. 8 (2020): 1433–40. http://dx.doi.org/10.4314/jasem.v24i8.19.

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Aquatic organisms such as fish are prone to contamination by water pollutants such as heavy metals. This study aims at assessing the levels of heavy metals in the fillet tissues of 75 fish samples comprising Clarias gariepinus (Catfish), Oreochromis niloticus (Tilapia) and Chrysichthys nigroditatus (Bagrid catfish) from five (5) different fishing locations along the Ogun River, Ogun State. The fillet tissues of the fish samples were digested and analysed for Zn, Pb, Fe, Cr and Cd using a Perkin Elmer, AAnalyst – 200 Atomic Absorption Spectrometer. The concentration of Zn in Clarias gariepinus, Oreochromis niloticus and Chrysichthys nigroditatus were 5.37±2.558, 6.58±2.35 and 5.11±1.55 respectively; while the levels of Pb in the species were Clarias gariepinus (1.30±3.099), Oreochromis niloticus (1.01±0.95) and Chrysichthys nigroditatus (0.35±0.59). Concentrations of Fe, Cr and Cd in the species were Clarias gariepinus (8.87±3.547, 0.08±0.098 and 0.09±0.100), Oreochromis niloticus (8.96±2.21, 0.12±0.11 and 0.11±0.11) and Chrysichthys nigroditatus (8.16±3.88, 0.11±0.11 and 0.11±0.11). The data revealed that most of these values were lower than FAO/WHO permissible except Pb and Cr. Some of the fish sampled may pose health hazards to the consumers. There is a need for constant monitoring of pollutants in Ogun River. Keywords: Heavy metals, Clarias gariepinus, Oreochromis niloticus, Chrysichthys nigroditatus, Ogun River

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Dwipayanti, Ni Made Utami, I. Gst Ayu Kunti Sri Panca Dewi, Ni Putu Gita Saraswati Palgunadi, Muliana Rofida, Ni Ketut Sutiari, and I. Gede Herry Purnama. "Health Risks Assessment of Heavy Metal from Consumption of Oreochromis Mossambicus and Oreochromis Niloticus in Denpasar, Bali." JURNAL KESEHATAN LINGKUNGAN 13, no. 4 (2021): 250. http://dx.doi.org/10.20473/jkl.v13i4.2021.250-258.

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Introduction: Heavy metals in the environment can accumulate in organisms through the food chain process. Previous studies recorded heavy metal concentrations above threshold limits value in Badung river, which warrants monitoring adverse health outcomes due to consuming fish from this river. This research aimed to estimate the potential risk from heavy metals exposure, namely Pb, Cd, Cu, and Cr, due to fish consumption. Methods: Fish samples were limited to Oreochromis Mossambicus and Oreochromis niloticus, commonly known as tilapia. Twenty samples of composite fish muscles were collected from three fishing sites. Subsequently, the heavy metals present in the samples were quantified using an atomic absorption spectrophotometer (AAS), and health risks were assessed by calculating estimated daily intake (EDI) and target hazard quotient (THQ) for both carcinogenic and non-carcinogenic risks. Results and Discussion: The average concentrations of Pb in Oreochromis Mossambicus (6.35±3.21 mg/kg) and Oreochromis niloticus (6.09±3.07 mg/kg) exceed the threshold limits value for fish products, but other heavy metals remain below. The average EDI from consuming Oreochromis Mossambicus with Pb is 0.0025-0.0026 mg/kg/days; Cu is 0.0037- 0.0062 mg/kg/day; Cr is 0.0001 mg/kg/day. EDI from consuming Oreochromis niloticus with Pb is 0.0015-0.0025 mg/kg/day; and 0.00 mg/kg/day for Cu and Cr. The THQ calculation for carcinogenic and non-carcinogenic health risks showed no health risk from consuming the fish from the Badung River. Conclusion: The study concludes that the consumption of Oreochromis Mossambicus and Oreochromis niloticus from the Badung River was generally safe from potential health risks.

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Ta'aladin, Zamdial. "ANALISA USAHA BUDIDAYA IKAN NILA MERAH (Oreochromis niloticus) SECARA TERPADU DENGAN AYAM (LONG-YAM) DI KABUPATEN BENGKULU UTARA." Jurnal AGRISEP 11, no. 2 (2012): 262–69. http://dx.doi.org/10.31186/jagrisep.11.2.262-269.

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The objectives of this research were to know the feasibility of effort of Nila merah (Oreochromis niloticus) culture in integrated manner with chicken (Long-Yam). This research was conducted in Bengkulu Utara Regency, Bengkulu Province. The data were analyzed by financial-economic aspect using Net Benefit-Cost Ratio (Net B/C Ratio), NPV (Net Present Value) and IRR (Internal Rate of Return). The result of financial-economic aspect analysis were obtained Net B/C Ratio = 1.71, NPV = 5,103,169 and IRR = 33,00. Based on the result of this analysis showed that the effort unit of nila merah (Oreochromis niloticus) culture in a integrated manner with chicken is feasible and can developed in Bengkulu Utara Regency. Keywords : Oreochromis niloticus, culture, integrated, long-yam

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Putri, Anggia Cahyati. "Pengaruh Insektisida Organoklorin Endosulfan Terhadap Daya Tetas Telur Ikan Nila (Oreochromis Niloticus)." BioScience 1, no. 1 (2017): 43. http://dx.doi.org/10.24036/02017117431-0-00.

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Uncontrolled usage of pesticides can contaminate the environment such as water, soil, and air. This occurs because the residue of pesticides. One of them, organochlorine insecticides have widely used by farmers because it is persistent. This study aims to look at the effects caused by organochlorine insecticide endosulfan on hatchability of eggs tilapia (Oreochromis niloticus). This research was conducted CRD with 6 treatments and 4 replications. Concentrations of organochlorine endosulfan in treatment are determined based on the LC50. The treatment use organochlorine endosulfan at concentrations of 0.00395%, 0.00400%, 0.00405%, 0.00410% and 0.00415%. Then they observed for 4 days (96 hours). The data obtained and analyzed by ANOVA and followed by DNMRT (Duncan's New Multiple Range Test). The result showed organochlorine insecticide endosulfan significantly (p<0,05) affect hatchability of eggs tilapia (Oreochromis niloticus), but no significant effect on larval abnormalities. Hatchability of eggs tilapia (Oreochromis niloticus) and the highest larval abnormalities are found in P1 which is a control treatment. While the hatchability of eggs and larvae abnormalities lowest for the P6 treatment with concentrations of endosulfan treatment 0.00415%.Keywords: endosulfan, Tilapia (Oreochromis niloticus), hatchability

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Pizzelli, Sargis. "DNA Analysis on Oreochromis Niloticus." International Journal Papier Advance and Scientific Review 1, no. 1 (2020): 1–7. http://dx.doi.org/10.47667/ijpasr.v1i1.6.

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This study aimed at investigating the tilapia fish (Oreochromis Niloticus) DNA. In analyzing Tilapia DNA, DNA extraction was carried out and PCR mixture was used for 20 μL of reaction, making Master Mix such as 1 μL Forward Primer, 1 μL Reverse Primer, 10 μL HotStar Taq Master Mix, 1 μL DNA Sample, 7 μL Nuslease Free Water. Mixing is done by adding the enzyme at the last stage. Then turn on the thermal cycler and set it according to the desired PCR conditions. Electrophoresis is carried out through stages such as Pre-Denaturation, Denaturation, Annealing, Extention, Final extension. The results showed that the virus did not infect tilapia (Oreochromis Niloticus). Tilapia sprayed on the gills with various doses showed the same results, namely no detection of KHV in mucus, kidneys, and liver.

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Meyer-Burgdorff, K. H., M. F. Osman, and K. D. Günther. "Energy metabolism in Oreochromis niloticus." Aquaculture 79, no. 1-4 (1989): 283–91. http://dx.doi.org/10.1016/0044-8486(89)90469-9.

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Renol, Renol, Finarti Finarti, Deddy Wahyudi, Mohamad Akbar, and Radhiyatul Ula. "RENDEMEN DAN pH GELATIN KULIT IKAN NILA (Oreochromis niloticus) YANG DIRENDAM PADA BERBAGAI KOSENTRASI HCl." Jurnal Pengolahan Pangan 3, no. 1 (2018): 22–27. http://dx.doi.org/10.31970/pangan.v3i1.9.

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Gelatin is derivative protein of collagen fiber which is found in the skin, bone, and cartilage. The composition of amino acids is almost similar to collagen, where glycine as the main amino acid and as 2/3 of all the amino acids that make it up, where 1/3 of the amino acids contained by proline and proline hydroxine. This research aims at knowing the physical charateristic of rendement and pH by using the skin of tilapia (Oreochromis niloticus) in concentration of HCL as immersion solution. The benefits of this research are expected to be the information sources of gelatin making in production scale, especially the gelatin production from the skin of tilapia (Oreochromis niloticus). The information are expected to support the development of information science and technology (IPTEK). Gelatin of tilapia skin (Oreochromis niloticus) used Completely Randomized Design (RAL) with 4 treatments. The treatments were HCl immersion to Tilapia’s skin (Oreochromis nilaticus) with N1 (4%), N2 (5%), N3 (6%) and N4 (7%) in 4 times repetitions

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Mahendra, Mahendra, Fazril Saputra, Citra Dina Febrina, Yusran Ibrahim, Farah Diana, and Sufal Diansyah. "PEMBERIAN ARANG AKTIF, ZEOLIT, DAN MANGANESE GREENSAND TERHADAP SURVIVAL Oreochromis niloticus PADA SISTEM TRANSPORTASI." JURNAL PERIKANAN TROPIS 7, no. 2 (2020): 115. http://dx.doi.org/10.35308/jpt.v7i2.1909.

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This study aims to determine the effect of administration of activated charcoal, zeolite, and manganese greensand on survival Oreochromis niloticus. The experimental design used was a completely randomized design (CRD) with 4 treatments and 3 repetitions. The treatments are P1 = without administration (control), P2 = administration of activated charcoal 10 gr/l P3 = administration of Zeolite 10 gr/l and P4 = administration of manganese 10 gr/l. The parameter observed in this study was survival Oreochromis niloticus. The results showed that administration of activated charcoal, zeolites, and manganese greensand significantly affected the survival of Oreochromis niloticus. The best value is obtained at treatment P1; P2; and P3, each with the best average survival value of 96%; 91%; and 91%. The lowest cost incurred is the treatment P1 Rp. 66.200, - with SR 96% transportation.

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Putra, Ewang Mahendra, Gunanti Mahasri, and Luthfiana Aprilianita Sari. "INFESTASI EKTOPARAIT PADA IKAN NILA (Oreochromis niloticus) YANG DIPELIHARA DENGAN MENGGUNAKAN SISTEM AKUAPONIK DAN TANPA AKUAPONIK." Journal of Aquaculture and Fish Health 7, no. 1 (2018): 42. http://dx.doi.org/10.20473/jafh.v7i1.11242.

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Penelitian ini bertujuan untuk mengetahui jenis ektoparasit dan perbedaan infestasi ektoparasit pada ikan nila (Oreochromis niloticus) yang dipelihara pada sistem akuaponik dan tanpa akuaponik. Metode penelitian rnenggunakan kuasi eksperimen intact-group comparison dengan terdapat dua perlakuan. Hewan uji menggunakan ikan nila dengan bobot 6-7 g/ekor. Hewan uji dipelihara di akuarium kaca berukuran 40cmx30cmx30cm yang diisi air sebanyak 15 liter. Perlakuan yang diberikan berupa pemeliharaan ikan nila dengan menggunakan sistem akuaponik dan pemeliharaan ikan nila tanpa menggunakan sistem akuaponik. Parameter yang diamati adalah jenis ektoparasit dan infestasi ektoparasit pada ikan nila. Jenis parasit yang ditemukan menginfestasi ikan nila (Oreochromis niloticus) pada pemeliharaan dengan menggunakan akuaponik maupun tanpa akuaponik adalah Argulus sp. Terdapat perbedaan yang nyata antara infestasi ektoparasit pada ikan nila (Oreochromis niloticus) yang dipelihara dengan sistem akuaponik dan tanpa akuaponik.

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Subekti, Sri, Muhammad Arief, and Galih Candra Prakosa Yudha. "Substitusi Silase Secara Kimiawi Limbah Padat Surimi Ikan Swanggi (Priacanthus macracanthus) Pada Tepung Ikan Terhadap Retensi Protein Dan Retensi Lemak Ikan Nila (Oreochromis niloticus) [Silage substitution Chemically Solid Waste Surimi Fish Swanggi (Priacanthus macracanthus) on to Retention Protein Fish Meal and Retention Fat Tilapia (Oreochromis niloticus)]." Jurnal Ilmiah Perikanan dan Kelautan 8, no. 2 (2019): 77. http://dx.doi.org/10.20473/jipk.v8i2.11180.

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AbstrakIkan nila (Oreochromis niloticus) merupakan suatu komoditas perikanan air tawar yang bernilai ekonomis. Permasalahan yang saat ini dihadapi dalam budidaya ikan nila adalah harga bahan pakan terutama tepung ikan semakin mahal. Upaya yang dapat dilakukan adalah menggantikan tepung ikan dengan limbah padat surimi ikan swanggi (Priacanthus macracanthus) secara kimiawi. Penelitian yang dilakukan bertujuan untuk mengetahui pengaruh substitusi limbah padat surimi ikan swanggi (Priaacanthus macracanthus) secara kimiawi pada tepung ikan terhadap laju pertumbuhan dan efisiensi pakan ikan nila (Oreochromis niloticus). Penelitian ini menggunakan metode eksperimental dengan Rancangan Acak Lengkap (RAL). Analisa statistik menggunakan Analysis of Variant (ANOVA) supaya dapat mengetahui pengaruh perlakuan. Berdasarkan hasil penelitian didapatkan hasil bahwa substitusi limbah padat dari surimi ikan swanggi (Priacanthus macracanthus) secara kimia pada tepung ikan tidak berbeda nyata (p>0,05) terhadap retensi protein dengan nilai P0(7,97), P1(9,26), P2(7,07), P3(11,02) dan retensi lemak ikan nila (Oreochromis niloticus) P0(4,09), P1(5,67), P2 (4,53), P3 (6,73) tidak menunjukkan perbedaan yang signifikan (P>0,05). Kualitas air media pemeliharaan ikan nila adalah suhu 26-28 °C, Oksigen terlarut 5-8 mg/l, pH 7-8, Amonia 0-1,5 mg/l. Abstract Tilapia (Oreochromis niloticus) is a freshwater fishery commodities that have economic value. The problems currently faced in tilapia fish farming is the price of feed ingredients, especially the more expensive fish meal. Efforts to do is replace fish meal with fish surimi swanggi solid waste (Priaacanthus macracanthus) chemically. This study aimed to determine the effect of substitution of solid waste swanggi fish surimi (Priaacanthus macracanthus) chemically in fish meal on the rate of growth and feed efficiency of tilapia (Oreochromis niloticus). This study uses an experimental method with completely randomized design (CRD). Statistical analysis using the Analysis of Variant (ANOVA) to determine the effect of treatment. Based on the results of the study showed that the substitution of solid waste swanggi fish surimi (Priacanthus macracanthus) chemical in fish meal did not significantly difference (p> 0.05) on the protein fish meal in the value of P0(7,97), P1(9,26), P3(7,07), P3(11,02)and retention fat tilapia (Oreochromis niloticus) P0(4,09), P1(5,67), P2 (4,53), P3 (6,73) did not showed significantly difference (P>0.05). Maintenance of water quality media tilapia is 26-28 ° C temperature, dissolved oxygen 5-8 mg / l, pH 7-8, Ammonia 0-1.5 mg / l.

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Tyas, Nanik Mustikaning, Djamar Tumpal Floranthus Lumban Batu, and Ridwan Affandi. "The lethal toxicity test of Cr6+ on (Oreochromis niloticus)." Jurnal Ilmu Pertanian Indonesia 21, no. 2 (2016): 128–32. http://dx.doi.org/10.18343/jipi.21.2.128.

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SCORDELLA, G., F. LUMARE, A. CONIDES, and C. PAPACONSTANTINOU. "First Occurrence Of The Tilapia Oreochromis Niloticus Niloticus (Linnaeus, 1758) In Lesina Lagoon (Eastern Italian Coast)." Mediterranean Marine Science 4, no. 1 (2003): 41. http://dx.doi.org/10.12681/mms.239.

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Individuals of the tilapia species Oreochromis niloticus niloticus(Linnaeus, 1758) were caught in Lesina Lagoon during experimental sampling for the shrimp Penaeus kerathurus using fyke net traps from December 1999 to September 2000. The species O. niloticusis not native in Italian coastal waters, although attempts of tilapia culture in land-based aquaculture farms were occasionally carried out in the past. The number of individuals captured in the samples suggests a colonization of the area of Lesina lagoon. The highest catches were observed during July. In July, the individuals caught represented the 22.3±4.1 % of the total catch weight. Such colonization of a marine environment byO. niloticusniloticus is the first case reported for Italy. The occurrence of the species in Lesina lagoon is attributed to fish which escaped from fish farms in the area and entered the lagoon through the numerous streams and irrigation-drainage channels that outflow along the south coastline.

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Ni Kadek Peniasih, I Gede Suranaya Pandit, and Dewa Gede Semara Edi. "Analysis of Microbial Contamination in Oreochromis Niloticus in Waduk Muara Nusa Dua." SEAS (Sustainable Environment Agricultural Science) 4, no. 1 (2020): 53–59. http://dx.doi.org/10.22225/seas.4.1.1688.53-59.

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This study aims to determine the microbiological contamination in the main water source of the Muara Nusa Dua Reservoir, the Tukad Badung River, and to determine the microbiological quality of fresh Oreochromis niloticus caught in the Muara Nusa Dua Reservoir in Denpasar. The study was conducted in May-August 2019 at the Denpasar Veterinary Laboratory. The method used is a descriptive method that aims to describe or describe the condition of the Tukad Badung watershed which empties into the Muara Nusa Dua Reservoir (Estuary Dam). Objective tests include the total bacterial test, the Coliform test, and the Escherichia coli contamination test. Water quality measurements are also carried out as supporting data from this study. The results of the study stated that there was microbiological contamination in the water source of the Muara Nusa Dua Reservoir, the Tukad Badung river, which also had an impact on the waters of the Muara Nusa Dua Reservoir. Microbiological contamination research results showed the microbiological quality of ten samples of Oreochromis niloticus in the form of the highest total bacteria was at 2.2x104, the highest total Coliform was 1.9x104 and the highest Escherichia coli contamination was at 93 APM / g with an average reservoir water quality Muara Nusa Dua in the form of temperature 27.3 °C, salinity 0.208 ‰, degree of acidity (pH) 6.5, dissolved oxygen (DO) 5,97 ppm. Organoleptic observations included the appearance, smell, and texture of Oreochromis niloticus with good results because when testing Oreochromis niloticus is still alive

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Iboyi, Nathaniel Onuche, Ogala Harrison, and Jummai Suleiman. "Proximate and minerals compositions of three species of fish, Champsocephalus gunnari, Oreochromis niloticus and hybrid catfish sold in Birnin Kebbi, Kebbi State, Nigeria." AROC in Food and Nutrition 1, no. 1 (2021): 8–14. http://dx.doi.org/10.53858/arocfn01010814.

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Background: Fish is known to be one of the cheapest sources of animal protein and have essential nutrients needed in human diets. The present study investigated the proximate and nutrient composition of three species of fish, Champsocephalus gunnari, Oreochromis niloticus, and hybrid catfish (Clarias gariepinus). Methods: The sample collection, proximate and mineral analysis were conducted using the standard protocols of sample collections and chemical analysis. Results: The results revealed that Champsocephalus gunnari, Oreochromis niloticus, and Clarias gariepinus contain moisture (66.00±0.50%, 52.00±1.00%, and 70.00±0.20%), crude protein (9.20±0.1323%, 3.75±0.02%and 5.80±0.05%), crude lipid (10.16±0.91%, 2.37±0.01% and 12.00±0.30%), ash (11.92 ±0.02%, 39.40±0.03% and 11.97±0.06%), and crude fiber (2.03±0.01%, 2.36±0.02% and 0.19±0.01%) respectively. The mineral contents were: iron (4.50±0.01mg/kg, 3.70±0.01 mg/kg and 4.70±0.02mg/kg), Zinc (2.35±0.01mg/kg, 2.15±0.0100mg/kg and (1.89±0.01mg/kg) for Champsocephalus gunnari, Oreochromis niloticus, and Clarias gariepinus respectively, while copper was only detected in C. gunnari (0.25±0.01mg/kg). The same amount of chromium (0.01±0.00 mg/kg) was detected in all the samples. Manganese was undetected in all the samples. Conclusion: In conclusion, the present study demonstrated the nutritional value of Champsocephalus gunnari, Oreochromis niloticus and Clarias gariepinus. This information would help in choosing any of the fish bases on their nutritional values rather than taste and other physical features.

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Brem, G., B. Brenig, G. Hörstgen-Schwark, and E. L. Winnacker. "Gene transfer in tilapia (Oreochromis niloticus)." Aquaculture 68, no. 3 (1988): 209–19. http://dx.doi.org/10.1016/0044-8486(88)90354-7.

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Sari, Alfi Hermawati Waskita, and Rani Ekawaty. "Inventarisasi dan Komposisi Jenis Ektoparasit Ikan Nila (Oreochromis niloticus) Sebagai Biomonitoring Perairan Sungai Tukad Badung, Bali." Journal of Marine and Aquatic Sciences 5, no. 1 (2018): 89. http://dx.doi.org/10.24843/jmas.2019.v05.i01.p11.

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Environmental stressors which coming from anthropogenic wastes that indirectly enters into the river waters also affect the biota's health in the ecosystem such as the Tilapia Fish (Oreochromis niloticus) which is found in the waters of the Tukad Badung River, Bali. The presence of parasites in fish is also associated with changes of the water quality. The objectives of this study is to provide data and information on the inventory and composition of the parasite species in Tilapia fish (Oreochromis niloticus) as the aquatic health biomonitoring of in the effort of sustainable river ecosystem management. The results of ectoparasit observation of the Tilapia which obtained from five stations in Tukad Badung waters found 6 types of ectoparasites, which are Trichodina sp. Dactylogyrus sp. Gyrodactylus sp., Chilodonella sp., Vorticella sp. and Lernea sp. The composition of the ectoparasite species of nila tilapia fish (Oreochromis niloticus) obtained from all five research stations in Tukad Badung waters by percentage of presence of ectoparasite Trichodina sp. are 70%, Dactylogyrus sp. 31%, Gyrodactylus sp. 4% and Chilodonella sp., Vorticella sp. and Lernea sp. 1%.

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Halijah, Halija, Sutia Budi, and Hadijah Zainuddin. "ANALISIS PERFORMA PERTUMBUHAN DAN KELANGSUNGAN HIDUP IKAN NILA SALIN (Oreochromis niloticus) YANG DIBERI SUPLEMENTASI TEMULAWAK (Curcuma xanthorriza) PADA PAKAN." Journal of Aquaculture and Environment 1, no. 2 (2019): 8–11. http://dx.doi.org/10.35965/jae.v1i2.264.

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Ikan nila (Oreochromis niloticus) merupakan salah satu komoditas ikan air tawar yang mendapat perhatian besar bagi usaha perikanan, mudah berkembangbiak, tumbuh cepat, toleran terhadap lingkungan yang kurang baik. namun pembudidaya sering mengalami kendala yakni pertumbuhan lambat dan rendahnya kelangsungan hidup. Salah satu upaya yang dilakukan adalah penambahan additive berupa suplementasi temulawak pada pakan ikan nila. Penelitian ini bertujuan untuk mengevaluasi pengaruh suplementasi temulawak (Curcuma xanthorriza) terhadap performa pertumbuhan dan kelangsungan hidup ikan nila (Oreochromis niloticus). Penelitian ini dilaksanakan pada bulan Oktober 2018 hingga Januari 2019 di Balai Benih Ikan (BBI) Dinas Perikanan Kabupaten Kepulauan Yapen. Metode penelitian yang dilakukan adalah metode eksperimen dengan rancangan acak lengkap (RAL) yang terdiri dari 4 perlakuan dan 3 kali ulangan. Ikan nila diberi pakan buatan dengan penambahan suplementasi temulawak dengan dosis berbeda (1,5%; 3%; 5%; dan 0%) per kg pakan. Berdasarkan hasil penelitian dapat disimpulkan bahwa perlakuan penambahan suplemen temulawak dengan dosis berbeda tidak berpengaruh terhadap laju pertumbuhan harian (p>0,05) tetapi berpengaruh nyata (p<0,05) terhadap kelangsungan hidup ikan nila salin (Oreochromis niloticus) yakni tertinggi terdapat pada perlakuan A (1,5%/kg pakan) sebesar 78,67%.

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Usman, M., J. A. Umaru, and A. A. Kigbu. "Acute toxicity of Jatropha curcas (barbados nut) latex extracts to Oreochromis niloticus juveniles." Tropical Freshwater Biology 29, no. 2 (2021): 47–58. http://dx.doi.org/10.4314/tfb.v29i2.4.

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The effects of the latex extract of Jatropha curcas on mortality rate, opercular ventilation rate and some behavioural responses of Oreochromis niloticus juveniles were investigated under laboratory conditions over a 96 hours exposure period. Juveniles of Oreochromis niloticus (Trewavas) were exposed in plastic aquaria to 0.00mg.l-1 (control), 10mg.l-1, 15mg.l-1, 20mg.l-1, 25mg.l-1 and 30mg.l-1. Their opercular beats per minute, tail fin beats per minute, mortality and probit kill were determined. Symptoms of toxicosis observed include agitated swimming, loss of equilibrium, air gulping, periods of quiescence and death. Within 24 hours the opercular ventilation beats and tail fin beats of the exposed fish were significantly higher than in control fish (p<0.05). At 72 hours and 96 hours the opercular and tailfin beats in the control fish were significantly higher (P<0.05) than the exposed fish. The 96 hours LC50 was determined as 5.23 ml/l. Include significance of this study to conclude abstract. Key words: acute toxicity, Jatropha curcas latex extract, Oreochromis niloticus, haematological parameters.

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Haruna, Auwalu. "STOMACH CONTENT ANALYSIS OF SOME SELECTED FISH SPECIES FROM GILIMA RIVER, TAURA LOCAL GOVERNMENT, JIGAWA STATE, NIGERIA." JOURNAL OF ADVANCES IN AGRICULTURE 4, no. 3 (2015): 455–59. http://dx.doi.org/10.24297/jaa.v4i3.4277.

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Four hundred (400) samples comprising eighty (80) samples each from five different species of Oreochromis niloticus, Bagrus bayad, Lates niloticus, Hydrocynus brevis and Synodontis vermiculatus were collected in batches using gill nets from 24th March -16th September, 2014; food and feeding habits were then assessed by analyzing the stomach content. The samples ranged in size from 525cm total length and 4.745g in weight. The stomach content analysis using frequency of occurrence method revealed that Oreochromis niloticus were herbivorous with dietary preference for plants and plant materials (47.27%), detritus (23.21%) and unidentifiable materials (6.06%), Bagrus bayad as carnivorous with dietary preference for fishes (52.17%), insects (23.57%), detritus (7.50%), Lates niloticus were also carnivorous with fishes (62.00%), fish parts (31.30%), insects (4.6%), Hydrocynus brevis proved carnivorous with dietary preference for fishes (42.16%), fish parts (17.83%), and Synodontis vermiculatus as an omnivore with dietary preference of plant materials (18.71%), fishes (12.69%), insect (12.19%) and detritus (17.48%).

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Adeosun, F. I., A. A. Akinyemi, W. O. Abdul, A. O. Agbon, and O. C. Odebiyi. "Assessment of heavy metals concentration in the intestine, kidney and muscle of Oreochromis niloticus in Federal University of Agriculture Abeokuta reservoir." Nigerian Journal of Animal Production 40, no. 1 (2020): 191–96. http://dx.doi.org/10.51791/njap.v40i1.699.

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Different sizes of Oreochromis niloticus (Tilapia) were caught using cast net in FUNAAB reservoir. Water samples were also collected and analyzed for five metals: Lead, Chromium, Cadmium, Zinc, and Copper by Atomic Absorption Spectroscopy (AAS). During the experiment, three tissues were compared with the level of metal in water, Intestine, Kidney and Muscles. Generally, lower concentrations of metals were recorded in water than in fish tissues; lower concentration in the tissue of O niloticus except were found in the water which is less than the recommendation for human consumption by World Health Organisation. Lead was found to be the dominant in the intestine of Oreochromis niloticus while Chromium was recorded the least of all the metals. There is a significant difference (P<0.05) in heavy metal concentration in the tissue of O niloticus except for Chromium. Though, the heavy metals of interest were present in a measurable quantities, they are still within safe limits for consumption.

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Seo, Kuen Hack, Byong Jin Kim, and Jae Yoon Jo. "Culture of Nile Tilapia (Oreochromis niloticus) in Recirculating Aquaculture System." Korean Journal of Fisheries and Aquatic Sciences 35, no. 1 (2002): 27–34. http://dx.doi.org/10.5657/kfas.2002.35.1.027.

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Manurung, Merlyn D., Reiny A. Tumbol, Henneke D. Pangkey, Deiske A. Sumilat, and Remy E. P. Mangindaan. "The use of Sponge Crude Extract to Increase Growth and Immune Response of Nile Tilapia Oreochromis niloticus." JURNAL ILMIAH PLATAX 7, no. 1 (2019): 256. http://dx.doi.org/10.35800/jip.7.1.2019.23228.

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This study aims to examine the effect of sponge crude extract addition to the fish feed on growth and non-specific immune response of nile tilapia (O. niloticus) and determine the most effective dose of the extract in raising the growth and the non-specific immune response of nile tilapia (O. niloticus). The sponge sample was macerated and then evaporated using a rotary vacuum evaporator until the sample became a paste and mixed with feed. The fish were fed for 14 days respectively as much as 5% of body weight per day with feeding frequency of two times a day. The results showed that addition of sponge crude extract to the fish feed gave good effect on the growth and the non-specific immune response of nile tilapia (O. niloticus) with best dose of 40 g / kg feed.Keywords: Sponge extract, fish immune response, fish growth, immune response, immunostimulant. ABSTRAKPenelitian ini bertujuan untuk menguji pengaruh penambahan ekstrak kasar spons pada pakan ikan terhadap pertumbuhan dan respon imun non spesifik ikan nila (Oreochromis niloticus) serta menentukan dosis ekstrak kasar spons yang paling efektif dalam meningkatkan pertumbuhan dan respon imun non spesifik ikan nila (Oreochromis niloticus). Sampel spons dimaserasi kemudian dievaporasi menggunakan rotary vacuum evaporator sehingga diperoleh ekstrak kasar berbentuk pasta yang kemudian dicampurkan pada pakan. Ikan uji diberi pakan perlakuan 5% dari bobot biomassa selama 14 hari dengan frekuensi pemberian pakan dua kali sehari. Hasil penelitian menunjukan bahwa penambahan ekstrak kasar spons pada pakan ikan memberikan pengaruh yang baik terhadap pertumbuhan dan respon imun non spesifik ikan nila (Oreochromis niloticus), yang mana dosis yang terbaik adalah 40 gr / Kg pakan.Kata Kunci : Ekstrak spons, respon imun ikan, pertumbuhan ikan, respon imun, imunostimulan.

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Khairani, Shafia, Faisal Fikri, Agus Purnomo, and Muhammad Thohawi Elziyad Purnama. "A Comparative Histological Study of Skin in Clarias gariepinus and Oreochromis niloticus." Media Kedokteran Hewan 32, no. 2 (2021): 90. http://dx.doi.org/10.20473/mkh.v32i2.2021.90-96.

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This study aimed to evaluate the comparative of histological figures in Clarias gariepinus and Oreochromis niloticus skin. A total of 18 samples were observed and collected the skin preservation. The hematoxylin-eosin staining performed to determine the histological structure. Results showed that there were different structures in the epidermis and dermis layer between C. gariepinus and O. niloticus skin. Club cells showed dominated in the epidermis layer of C. gariepinus. The pigmented cell showed clearly in the basement layer of C. gariepinus compared to O. niloticus. Stratum compactum in O. niloticus also showed adequate compared to C. gariepinus.

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A, Omoike. "The Growth and Survival of Various Forms Androgen Sex - Reversal Oreochromis niloticus Cultured Using Hapas in Concrete Tank." Aquaculture & Fisheries 5, no. 1 (2021): 1–5. http://dx.doi.org/10.24966/aaf-5523/100036.

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The production of same sex Oreochromics niloticus to enhance better and uniform growth for Tilapia culture has called for technological means using sex-reversal hormones Methyl Testosterone (MT), this study will look into the percentage growth and survival of Oreochromics niloticus fry.

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Khalafalla, Malik. "Utilization of Some Med Oreochromis Niloticus ical Plants as Feed Additives for Nile Tilapia, Oreochromis Niloticus, Feeds." Mediterranean Aquaculture Journal 2, no. 1 (2009): 9–18. http://dx.doi.org/10.21608/maj.2009.2665.

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Ayoola, Simeon Oluwatoyin, and Hubaidat Oyinkansola Ishola. "The growth performance and genotoxicity effect of dietary Aloe vera on Oreochromis niloticus juveniles." Aceh Journal of Animal Science 5, no. 2 (2020): 92–97. http://dx.doi.org/10.13170/ajas.5.2.16044.

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Growth and all activities of fish depend significantly on the food they consume. However, with the rising price of conventional feedstuffs, there is a need to investigate less expensive and readily available plant source as an additive. This research is designed to study the effect of dietary Aloe vera on the growth performance of Oreochromis niloticus juveniles (41.71±0.78g) and its effect on genotoxicity (MN: Micronucleus; LB: Lobed; BD: Bud; BL: Blebbed; BN: Binucleated; NT: Notched). This research investigated the growth performance and genotoxicity activity of Oreochromis niloticus juveniles in a tank culture system. Aloe vera (fine powder) was used as a test ingredient in the feed formulation at five inclusion levels (T1 = 5g, T2 =10g, T3 =15g, T4 =20g, T5 =25g) and the Control diet (C0) without the test ingredient. Test diets were fed to Oreochromis niloticus juveniles, and each diet was assigned to the treatments and control overall in triplicates. Feeding with test diets was for twelve (12) weeks at 5% of their total body weight daily, which was divided into two and administered at 8 hrs and 16 hrs. The result showed that the highest growth rate (10.99 ± 5.49g) and the lowest FCR (0.68 ± 0.08) were recorded in the fish fed with the Control diet (C0). Better growth and nutrient utilization were achieved at low inclusion levels of Aloe vera, at 5g(T1) (8.98 ± 4.49) and 10g (T2) (6.73 ± 3.28) compared to the higher levels of incorporations of the test ingredient. The mean pH and temperature (°C) and dissolved Oxygen level mg/L are 6.50±0.30, 26.3±0.60 and 4.48±0.52mg/L respectively. The values of micronuclei for the cultured Oreochromis niloticus juveniles were recorded to be (T1 = 5.50 ± 0.50, T2 = 2.00 ± 1.00, T3 = 2.00 ± 0.00, T4 = 2.50 ± 1.50, T5 = 4.00 ± 1.00, and C0 = 7.00 ± 2.00). Nuclear abnormalities were recorded in T2 (BD = 1.00 ± 0.00), T3 (NT = 1.00 ± 0.00), T4 (BD = 1.33 ± 0.47, BN = 3.33 ± 0.47), and T5 (BN = 5.33 ± 0.47, LB = 3.00 ± 1.00, BL = 1.67 ± 0.47) . However, no abnormality was recorded in the fish fed with the Control diet (C0). This result showed that the slight addition of this Aloe vera to the diet of Oreochromis niloticus would enhance productivity.

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EL-Shammaa, Mamdouh A., Hany A. El-Habback, Gehad, A. El-Bargeesy, and Shymaa H. Hussein. "HISTOLOGICAL STUDIES ON SOME IMMUNE ORGANS OF OREOCHROMIS NILOTICUS (TILAPIA NILOTICA." Kafrelsheikh Veterinary Medical Journal 6, no. 1 (2008): 60–93. http://dx.doi.org/10.21608/kvmj.2008.115900.

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Nirmala, Kukuh, Yuni Puji Hastuti, and Vika Yuniar. "Toxicity of mercury (Hg) on survival and growth rate, hemato- and histopathological parameters ofOreochromis niloticus." Jurnal Akuakultur Indonesia 11, no. 1 (2013): 38. http://dx.doi.org/10.19027/jai.11.38-48.

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Heavy metals are serious pollutants of the aquatic environment because of their environmental persistence and ability to be accumulated by aquatic organisms. Oreochromis niloticus exposed to 0, 0.16, 0.5, and 1.0 ppm Hg for 30 days. The aim of this study was to determine the influence of mercury in water on survival rate, growth rates, hematological, and histological parameters of Oreochromis niloticus. This study was conducted from Mei to June 2009. The experimental design was arranged in completely randomized design with four treatments and three replications. Stock density was 8 fish/aquarium with mean initial body weight was 15.70±1.13 g. Growth and survival rates of test fish were decreased with increasing the Hg concentration. Red blood cell (RBC) count, haematocrit content, and haemoglobin content decreased when compared to the control. The number of white blood cells (WBC) increased in mercuric treated fish. The results are statistically significant at p&lt;0.05 level. Keywords:mercury, survival and growth rate, hematology, histopathology, Oreochromis niloticus

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Rezk, Mahmoud, and Ebtehag Kamel. "Cold tolerance of selective breeding of Oreochromis niloticus and oreochromis aureus." Egyptian Journal for Aquaculture 1, no. 1 (2011): 43–53. http://dx.doi.org/10.21608/eja.2011.32049.

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Bai, L. R., A. L. Wang, Z. Y. Zhao, and Y. T. Miao. "Neurobehavioural analysis of developmental iron deficiency in Oreochromis aureus × Oreochromis niloticus." Journal of Fish Biology 84, no. 6 (2014): 1748–67. http://dx.doi.org/10.1111/jfb.12396.

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Ariyanto, Didik, and Imron Imron. "KERAGAMAN TRUSS MORFOMETRI IKAN NILA (oreochromis nitoticus) srRAlN 69, GIFT G-3, DAN GIFT G-6." Jurnal Penelitian Perikanan Indonesia 8, no. 5 (2017): 11. http://dx.doi.org/10.15578/jppi.8.5.2002.11-18.

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Asmamaw, Berhan, and Misikire Tessema. "Morphometric Variations of Nile Tilapia (Oreochromis niloticus) (Linnaeus, 1758) (Perciformes, Cichlidae) Collected from Three Rift Valley Lakes in Ethiopia." Journal of Aquaculture and Fish Health 10, no. 3 (2021): 341. http://dx.doi.org/10.20473/jafh.v10i3.26606.

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The pattern of morphometric differentiation among three populations of Tilapia (Oreochromis niloticus) sited in Koka, Ziway, and Langano lakes in the Ethiopian rift valley was examined. Morphometric differentiation was examined, compared and quantified by the use of twelve different body measurements in 391 specimens to generate baseline information for conservation and product improvement plans. The result revealed that comparisons of mean values of morphometric measurements in the three studied tilapia populations statistically significant differences (P<0.05). The Fulton’s condition factor (K) of Oreochromi niloticus samples collected from Lakes Koka, Ziway, and Langano was 1.48, 1.2, and 0.66, respectively. The Discriminant Function Analysis performed on seven variables led to a correct classification in 90.5 % of cases. Differences observed between samples in this study indicated that there is important morphometric variation between the studied tilapia populations. Plotting the two significant canonical discriminant functions separated the Lake Langano population from the other two.

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SOROMOU, Lanan Wassy, Berthin THEA, Yamoussa BANGOURA, et al. "Hormonal sex reversal technique of Oreochromis niloticus larvae in a tank in the Urban Commune of Kankan, Republic of Guinea." Journal of Drug Delivery and Therapeutics 11, no. 5 (2021): 16–22. http://dx.doi.org/10.22270/jddt.v11i5.4977.

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Hormonal sex - reversal is widely recognized as having significant advantage over both manual sexing and hybridization. The present study carried out in the aquaculture center of Kankan aimed at producing monosex male fry of Oreochromis niloticus in order to increase the yield of this species. During this study, 95 Oreochromis niloticus broodstock including 21 males and 74 females were paired (spawned) in a spawning tank of 135 m2 surface for 15 days. The respective mean weights of the spawners were 448.6 ±157.7 g for males and 406.7±115.9 g for females. Hormonal treatment was performed on 900 larvae with an average initial weight of 0.028 g from the 10th post fertilization to the 38th day in a tank of one (1) m3. The larvae were fed with 1 kg of imported "Raanan Premium Fish" powdered feed titrated with 40% protein, mixed in a hormonal solution containing 17-α-methyltestosterone and 90% ethanol with respective doses of 100 mg and 500 ml. At the end of hormonal treatment, 578 fry with a final average weight of 4.5 g were conducted in a pre-pregnancy tank with a surface area of 50 m2 for 30 days and yielded at the end of pre-pregnancy 501 fry with a final average weight of 13 g, a daily growth rate of 0.22 g, a specific growth rate of 1.7%, a survival rate of 64% and a mortality rate of 36%. After sex identification (sexing), the rates of hormonal treatment were 83.33% and 16.66% for males and females, respectively. In conclusion, the popularization of the results of this study could be considered as an alternative for a production of monosex male population in Oreochromis niloticus that will feed the networks of local producers to improve the production of the species throughout the country. Keywords: Oreochromis niloticus, hormone, sex, larvae and tank.

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Evans, Joyce J., Phillip H. Klesius, David J. Pasnik, and John F. Bohnsack. "HumanStreptococcus agalactiaeIsolate in Nile Tilapia (Oreochromis niloticus)." Emerging Infectious Diseases 15, no. 5 (2009): 774–76. http://dx.doi.org/10.3201/eid1505.080222.

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Müller-Belecke, Andreas, and Gabriele Hörstgen-Schwark. "Performance testing of clonal Oreochromis niloticus lines." Aquaculture 184, no. 1-2 (2000): 67–76. http://dx.doi.org/10.1016/s0044-8486(99)00318-x.

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Zhang, Z., and N. W. Runham. "Otolith microstructure pattern in Oreochromis niloticus (L.)." Journal of Fish Biology 40, no. 3 (1992): 325–32. http://dx.doi.org/10.1111/j.1095-8649.1992.tb02579.x.

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Lim, Chhorn, Mediha Yildirim-Aksoy, Margarida M. Barros, and Phillip Klesius. "Thiamin Requirement of Nile Tilapia, Oreochromis niloticus." Journal of the World Aquaculture Society 42, no. 6 (2011): 824–33. http://dx.doi.org/10.1111/j.1749-7345.2011.00531.x.

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Wedekind, H., G. Hörstgen-Schwark, and H. J. Langholz. "Investigations on sex ratio in Oreochromis niloticus." Aquaculture 85, no. 1-4 (1990): 321–22. http://dx.doi.org/10.1016/0044-8486(90)90038-o.

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Eid, Abd Elhamid, and Samir Ibrahem Ghonim. "Dietary zinc requirement of fingerling Oreochromis niloticus." Aquaculture 119, no. 2-3 (1994): 259–64. http://dx.doi.org/10.1016/0044-8486(94)90180-5.

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Fujimura, Koji, and Thomas D. Kocher. "Tol2-mediated transgenesis in tilapia (Oreochromis niloticus)." Aquaculture 319, no. 3-4 (2011): 342–46. http://dx.doi.org/10.1016/j.aquaculture.2011.07.021.

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Alam, M. S., A. Popplewell, and N. Maclean. "Expression of transgenes in tilapia (Oreochromis niloticus)." Aquaculture 137, no. 1-4 (1995): 187–88. http://dx.doi.org/10.1016/0044-8486(96)83559-9.

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AMOO, Timothy O., and Olaniyi O. KOMOLAFE. "Length-Weight Relationships and Condition Factors of Several Nigerian Fish Species." Notulae Scientia Biologicae 8, no. 1 (2016): 21–26. http://dx.doi.org/10.15835/nsb819780.

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The length-weight relationship and condition factor of Sarotherodon galilaeus and Oreochromis niloticus were observed in Strabag Lake. A total number of 365 individuals of the fish species were caught during the period of study with Sarotherodon galilaeus constituting 65.21% of the total catch while Oreochromis niloticus made up 34.79% of the catch. The mean weight (W) and mean total length (TL) were 56.04 ± 1.019 g and14.64 ± 0.103 cm respectively for S. galilaeus;62.86 ± 2.184 g and15.84 ± 0.171 cm respectively for O. niloticus. The values of constants a and b (growth exponent) were determined from the length and weight data which transformed into the linear equation of log W = log a + b log L. These parameters were then fitted to the exponential equation, W = [aL]b. The respective exponential equation for the length-weight relationship was W = 0.068[L]2.5 for S. galilaeus and W = 0.034[L]2.7 for O. niloticus which shows that both species exhibited negative allometric growth (b < 3.0). The correlation coefficient (r) and condition factor (K) recorded were 0.944 and 6.70 respectively for S. galilaeus and 0.911 and 3.49 respectively for O. niloticus specimens. The species showed negative allometric growth and were thriving well in the environment.

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Hidayah, Anny Miftakhul, Purwanto Purwanto, and Tri Retnaningsih Soeprobowati. "Biokonsentrasi Faktor Logam Berat Pb, Cd, Cr dan Cu pada Ikan Nila (Oreochromis niloticus Linn.) di Karamba Danau Rawa Pening." Bioma : Berkala Ilmiah Biologi 16, no. 1 (2014): 1. http://dx.doi.org/10.14710/bioma.16.1.1-9.

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Lake Rawapening has potential as an aquaculture development especially for caged aquaculture activities. Water quality is one of the important requirements in aquaculture bussiness sustainability and safe fish production for human consumption. Previous researches showed that the cage regions of Lake Rawapening have decreased its water quality in the presence of heavy metal content of Pb, Cd, Cr and Cu in water, sediment and tilapia (Oreochromis niloticus Linn.). This research aimed to determine the value of bio-concentration factors of heavy metals Pb, Cd, Cr and Cu in tilapia (Oreochromis niloticus Linn.) which is cultured in cages Lake Rawapening and maximum daily consumption of tilapia that is safe for human consumption. Sampling was done by purposive random sampling at three cages stations. The results showed that the highest BCF values of heavy metals in tilapia (Oreochromis niloticus Linn.) was on Cu 146-172, while the lowest metal on Cd metal 1.25-2. According to the category of the BCF rate, Cu was categorized as moderately accumulated, whereas Pb, Cd, and Cr were categorized as low accumulated. so that farmed tilapia cages are suitable for consumption. Daily consumption of farmed tilapia in Lake Rawapening was maximum 1,4 kg/day Keywords: Lake Rawapening, heavy metals, tilapia, BCF .

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AGBEBI, O. T., and J. ECHEFU. "PHYLOGENETIC ANALYSIS ON FOUR SPECIES OF TILAPIA (Oreochromis niloticus, Tilapia zilli, Sarotherodon galilaeus, Sarotherodon melanotheron) IN NIGERIA." Journal of Agricultural Science and Environment 16, no. 2 (2017): 61–68. http://dx.doi.org/10.51406/jagse.v16i2.1707.

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An investigation into evolutionary history of four species of Tilapia species was carried out as a taxonomy tool to relate most tilapia species found within the Nigerian waters. These species are (Oreochromis niloticus, Tilapia zilli, Sarotherodon galilaeus, Sarotherodon melanotheron). Blood samples from the four species of tilapia were collected and preserved on Fast Technology for Analysis (FTA) cards for DNA extraction and PCR amplification. The various nucleotide sequences of the four Tilapia species found in the Mitochondria D-loop region were copied and aligned with the use of BioEdit and Mega 6.0 softwares. Three phylogenetic trees were drawn to show the evolutionary relationship amongst the four species of tilapia. The results indicated that Sarotherodon galilaeus and Sarotherodon melanotheron are sister texa and share a common ancestor with Oreochromis niloticus. Tilapia zilli is an out group which is the most distantly related to the three species (Oreochromis niloticus, Sarotherodon galilaeus Sarotherodon melanotheron). Tilapia zilli (Israel) and Tilapia zilli are sister texa and share a common ancestor in Tilapia sparmanii. The study also revealed ancestry relationship among other species of fish Cyprinus caprio and Clarias gariepinus formed a clade with the three tilapia species (Tilapia zilli, Tilapia zilli (Israel) and Tilapia sparmanii), which share an unknown but common ancestor.

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