Combined effects of photoperiod and temperature on growth and survival of African catfish (Clarias gariepinus,Burchell 1822) larvae under laboratory conditions |
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| Authors: | Paul Sagwe Orina Joseph Rasowo Elijah Oyoo-Okoth Safina Musa Jonathan M. Munguti Harrison Charo-Karisa |
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| Affiliation: | 1. Department of Biological Sciences, University of Eldoret, Eldoret, Kenyapaulorina@gmail.com porina@kmfri.co.ke;3. Department of Biological and Physical Sciences, Moi University, Eldoret, Kenya;4. School of Natural Resources and Environmental Studies, Karatina University, Karatina, Kenya;5. Kenya Marine and Fisheries Research Institute, Kegati Aquaculture Research Station, Kisii, Kenya;6. Kenya Marine and Fisheries Research Institute, Sagana Aquaculture Research Center, Sagana, Kenya;7. State Department of Fisheries, Nairobi, Kenya |
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| Abstract: | ![]()
ABSTRACTThe effect of photoperiod (24L:00D, 12L:12D, and 00L:24D) and temperature (22 ± 1°C and 28 ± 1°C) on performance of Clarias gariepinus larvae was tested. Larvae weighing 3.2 ± 0.24 mg were cultured in aquaria at a stocking density of 20 fish L?1 and fed twice a day on catfish starter diet (40% CP) at 10 % BW day?1. Highest mean weight gain (31.00 mg), SGR (7.56% day?1), and survival (83%) were achieved at photoperiod and temperature combination of 00L:24D and 28 ± 1°C. Percent survival of larvae differed significantly (p < .05) among treatments with optimal survival of (83%) in treatment combination of 28 ± 1°C and 00L:24D, while lowest survival (40%) in treatment combination of 22 ± 1°C and 24L:00D. |
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| Keywords: | Clarias gariepinus growth photoperiod survival temperature |
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