Profitability of an economic diet in practical fish farming: a case study of vitamin C inclusion in the diet of Heterobranchus longifilis fingerlings
A completely randomised design with three replicates was used for an experiment conducted to study the profitability of vitamin C inclusion into the ration formulation for Heterobranchus longifilis. Six different levels 0, 50, 100, 150, 200 or 250 mg of L-ascorbic acid (vitamin C) kg-1 diet was included in a 42.5% crude protein basal diet and fed to triplicate groups of twenty fingerlings. The groups fed diets with vitamin C had statistically significant (P<0.05) higher final weight than the group fed the control diet without vitamin C at the end of twenty weeks study, Feed consumed was significantly (P<0.05) lower in the group fed diet without vitamin C. There was a significant (P<0.05) difference between the groups fed 0 and 50 mg vitamin C kg-1 diets, but no significant (P>0.05) difference between the groups fed diets with 100, 150, 200 and 250 mg vitamin C kg-1 diet on this parameter. Mortality was significantly (P<0.05) higher in the groups fed diet without vitamin C while there was no significant difference (P>0.05) between the fish fed the diets with respective graded levels of vitamin C. The thiobarbituric acid reactive substance (TBARS) of the liver and whole body of fish was significantly (P<0.05) higher in fish fed diet devoid of vitamin C. Cost per kilogram of fish base on feed input was significantly (P<0.05) higher in the group fed diet without vitamin C than those enriched with vitamin C. However, within groups fed with vitamin C cost per kg of fish was significantly (P<0.05) decreasing in the following order: diet 2> diet 6> diets 4, 5, and 3. There was no significant difference (P>0.05) between fish fed diets 3, 4 and 5 with respect to cost per kilogram of fish. This study vividly showed that there is no alternative to the use of a complete diet with vitamin C in an intensive practical farming of H. longifilis geared towards optimum profit maximisation in terms of feed as one of the variable input.
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
Fisheries Society of Nigeria
2007
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| Subjects: | Aquaculture, Heterobranchus longifilis, Nigeria, New Bussa, freshwater environment, Diets, Feeding experiments, Vitamin C, |
| Online Access: | http://hdl.handle.net/1834/37775 |
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| Summary: | A completely randomised design with three replicates was used for an experiment conducted to study the profitability of vitamin C inclusion into the ration formulation for Heterobranchus longifilis. Six different levels 0, 50, 100, 150, 200 or 250 mg of L-ascorbic acid (vitamin C) kg-1 diet was included in a 42.5% crude protein basal diet and fed to triplicate groups of twenty fingerlings. The groups fed diets with vitamin C had statistically significant (P<0.05) higher final weight than the group fed the control diet without vitamin C at the end of twenty weeks study, Feed consumed was significantly (P<0.05) lower in the group fed diet without vitamin C. There was a significant (P<0.05) difference between the groups fed 0 and 50 mg vitamin C kg-1 diets, but no significant (P>0.05) difference between the groups fed diets with 100, 150, 200 and 250 mg vitamin C kg-1 diet on this parameter. Mortality was significantly (P<0.05) higher in the groups fed diet without vitamin C while there was no significant difference (P>0.05) between the fish fed the diets with respective graded levels of vitamin C. The thiobarbituric acid reactive substance (TBARS) of the liver and whole body of fish was significantly (P<0.05) higher in fish fed diet devoid of vitamin C. Cost per kilogram of fish base on feed input was significantly (P<0.05) higher in the group fed diet without vitamin C than those enriched with vitamin C. However, within groups fed with vitamin C cost per kg of fish was significantly (P<0.05) decreasing in the following order: diet 2> diet 6> diets 4, 5, and 3. There was no significant difference (P>0.05) between fish fed diets 3, 4 and 5 with respect to cost per kilogram of fish. This study vividly showed that there is no alternative to the use of a complete diet with vitamin C in an intensive practical farming of H. longifilis geared towards optimum profit maximisation in terms of feed as one of the variable input. |
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