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| Igbinosun, J.E.; Talabi, S.O.; Roberts, O.O.; Okolie, E.. |
| The nutritional effects of the complete or partial replacement of fishmeal by Soyabean meal in the diets of catfish were investigated. Four diets A, B, C, and D in which 34% of fish meal was replaced weight by weight with 0%, 10%, 20% and 34% of Soya-bean meal respectively were fed to four groups of brackish water catfish for six weeks. Results showed that although the digestibilities of proteins were almost equal in all the four groups, the groups fed diet D in which 100% of the fishmeal had been replaced by Soyabean had the least growth as compared to A, B and C. Nevertheless, the group fed diet D (with the least growth) had an economy of gain twice that of the group fed diet A. The liver and heart indices and the proximate compositions of the muscle... |
| Tipo: Working Paper |
Palavras-chave: Brackishwater aquaculture; Aquaculture development. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/2322 |
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| Igbinosun, J.E.; Talabi, S.O.. |
| Four groups of brackish water catfish were fed four diets: N. F. (NIOMR formula 1 feed). A. B. and C. for seven weeks. Feeds N.F., A., B. and C. contained 1.21% fish oil + 5.59% vegetable oil; 1.21% fish oil + 7.39% vegetable oil; 1.21% fish oil + 9.09% vegetable oil; 1.21% fish oil +10.89% vegetable oil respectively. The total amounts of vegetable oil in A., B. and C. included the supplementation of the residual oil in the ingredients with 2%, 4% and 6% respectively with ordinary cooking mixed vegetable oil. Results of feeding trial showed that growth was best in the group led diets containing 10.89% vegetable oil and least in those containing 9.09% vegetable oil. There seemed to have been a positive correlation between growth rate and hepatic... |
| Tipo: Working Paper |
Palavras-chave: Aquaculture development; Brackishwater aquaculture. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/2323 |
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| Dublin-Green, C.O.; Ojanuga, A. G.. |
| Actual and potential acid sulfate soils cover over 750,000 ha. of unclassified wetlands in the mangrove swamp of the Niger Delta. This belt serves many functions including aquaculture development. Presently a number of brackish water aquaculture projects are sited on these soils. In acid sulfate soils, an acidic condition usually develops due to oxidation of the sulfidic materials (e.g. Iron Sulfides) in the soils. Elements such as iron and aluminum are released to pond water in large quantities, while essential nutrients like phosphorus and nitrogen become fixed in the soil and thus are unavailable to the larger community. Acid sulfate soils pose a range of problems for brackish water aquaculture- including, slow fish growth, low fish yields and mass... |
| Tipo: Report |
Palavras-chave: Aquaculture development; Brackishwater aquaculture. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/2391 |
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