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Effect of initial stocking size of the predatory African sharptooth catfish (Clarias gariepinus) on recruits, growth performance, survival and yield of mixed-sex Nile tilapia (Oreochromis niloticus) in concrete tank culture system

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dc.creator Samwel Mchele Limbu
dc.creator Amon P., Shoko
dc.creator Lamtane, Hieromin A.
dc.creator Shirima, Evantuce D.
dc.creator Kishe-Machumu, Mary A.
dc.creator Mgana, Huruma F.
dc.creator Mgaya, Yunus D.
dc.date 2016-01-25T15:15:37Z
dc.date 2016-01-25T15:15:37Z
dc.date 2015-01-21
dc.date.accessioned 2021-05-03T13:36:18Z
dc.date.available 2021-05-03T13:36:18Z
dc.identifier Limbu, S.M., Shoko, A.P., Lamtane, H.A., Shirima, E.D., Kishe-Machumu, M.A., Mgana, H.F. and Mgaya, Y.D., 2015. Effect of initial stocking size of the predatory African sharptooth catfish (Clarias gariepinus) on recruits, growth performance, survival and yield of mixed-sex Nile tilapia (Oreochromis niloticus) in concrete tank culture system. International Aquatic Research, 7(1), pp.63-73.
dc.identifier 10.1007/s40071-014-0093-3
dc.identifier http://hdl.handle.net/123456789/190
dc.identifier.uri http://hdl.handle.net/123456789/47633
dc.description Prolific breeding and production of high percentage of recruits are main problems in mixed-sex Nile tilapia (Oreochromis niloticus) culture in earthen ponds. The current study assessed the efficiency of different sizes of African sharptooth catfish (Clarias gariepinus) in controlling recruitment in mixed-sex Nile tilapia cultured in tanks and its effect on growth performance, percentage survival and yield. Three treatments consisting of triplicate ponds stocked with mixed-sex Nile tilapia in monoculture and in polyculture with large (62.50 ± 3.26 g) and small (40.00 ± 2.68 g) African sharptooth catfish were fed on a 297.50 g kg-1 crude protein diet for 126 days. Results showed that, the number of recruits was significantly lower in larger African sharptooth catfish predator than smaller ones and monoculture of Nile tilapia. Polyculture with larger African sharptooth catfish resulted in significantly higher growth performance of Nile tilapia. Large African sharptooth catfish in polyculture reduced the amount of small, low-value recruits, while the yield of large and high value Nile tilapia was increased. This study revealed that fish farmers can reduce prolific breeding, obtain higher growth performance and produce larger size of marketable Nile tilapia by predominantly stocking ponds with large African sharptooth catfish predator of at least 60 g.
dc.description We express our sincere thanks to Tanzania Commission for Science and Technology (COSTECH) through ‘‘KILIMO KWANZA’’ programme for provision of a research grant. Tanzania Fisheries Research Institute (TAFIRI), the University of Dar es Salaam and Sokoine University of Agriculture (SUA) are acknowledged for granting permission for authors to participate in the study. SUA is also acknowledged for provision of research facilities.
dc.language en
dc.publisher Springer
dc.subject Predator
dc.subject Recruitment
dc.subject Polyculture
dc.subject Monoculture
dc.subject Prolific breeding
dc.subject Production
dc.title Effect of initial stocking size of the predatory African sharptooth catfish (Clarias gariepinus) on recruits, growth performance, survival and yield of mixed-sex Nile tilapia (Oreochromis niloticus) in concrete tank culture system
dc.type Journal Article, Peer Reviewed


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