Growth performance, feed efficiency and carcass composition of African catfish, Clarias gariepinus (Picess: Clariidae) fingerlings fed diets composed of agricultural by-products

Yousif, Omer M and Krishnakumar, K and Fatah, A A and Abdul Rahman, A (2014) Growth performance, feed efficiency and carcass composition of African catfish, Clarias gariepinus (Picess: Clariidae) fingerlings fed diets composed of agricultural by-products. International Journal of Biosciences, 4 (10). pp. 276-284.

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    Abstract

    Four experimental diets were formulated to contain different ratios of animal protein to plant protein of 1:12 (diet F1), 1:9 (diet F2), 1:6 (diet F3) and 1:2 (diet F4).Diets F1 and F2 contained crude protein level of 35% at gross energy of 17 kJ/g providing protein to energy ratios (P/E) of 21 23 mg CP/kJ while diets F3 and F4 contained crude protein of 40% at gross energy level of 19 kJ/g providing P/E of 23 mg CP/kJ. The diets were fed to quadruplicate groups of African catfish Clarias gariepinus fingerlings (5.37 ± 0.23 g) for 12 weeks. The group of fish receiving the experimental diet F4 attained the highest (P < 0.05) final weight (31.25 g), weight gain (480.41%), specific growth rate (2.09 %/day), carcass nitrogen deposition (8.86 mg/day), apparent nitrogen utilization (28.81 %) and energy conversion efficiency (19.60 %). These results were followed by the fish group fed diet F3. The lowest (P < 0.05) results were attained by fish groups fed diets F1 and F2. The best (P < 0.05) feed conversion ratios were recorded in the groups of fish fed diets F3 and F4 and the poorest values were observed in the groups fed diets F1 and F2. Survival rates ranged between 86.67 and 93.33% and no significant differences (P > 0.05) were observed between the experimental groups. The highest (P < 0.05) body protein, lipid and energy content attained by the fish fed diet F4. These findings suggest that a diet containing a proportion of 1 : 2 animal protein to plant protein at protein level of 40%, gross energy of 19 kJ/g diet, and a protein to energy ratio of 23 mg CP/kJ could allow a complete replacement of commercial fish meal with agricultural by-products in diets of African catfish without negatively affecting its growth performance, feed utilization or carcass composition.

    Item Type: Article
    Subjects: Fish and Fisheries > Fish biology > age and growth
    Aquaculture > Cage culture
    Demersal Fisheries > Catfish
    Food and Feeding
    Aquaculture
    Divisions: Contributors
    Depositing User: Arun Surendran
    Date Deposited: 21 Sep 2016 05:56
    Last Modified: 21 Sep 2016 05:56
    URI: http://eprints.cmfri.org.in/id/eprint/11154

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