Recruitment control of Nile tilapia, Oreochromis niloticus, by the African catfish, Clarias gariepinus (Burchell 1822), and the African snakehead, Ophiocephalus obscuris. I. A biological analysis

Graaf, G. de; Galemoni, F; Banzoussi, B

doi:10.1016/s0044-8486(96)01362-2

Cited by 29 publications

(38 citation statements)

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“…As a result, the total biomass at harvest comprises 28-70 % of small-size, low-value fish originating from spontaneous breeding (de Graaf et al 1996;Ofor et al 2011). The increased number of recruits in mixed-sex culture causes stunted growth due to shortage of space and competition for food (Yi et al 2002;Abdel-Tawwab 2005;Offem et al 2009).…”

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confidence: 99%

“…Using a predatory fish to control recruitment in mixed-sex Nile tilapia cultured in ponds is perceived as one of the most appropriate, safe and affordable method in developing countries (AbdelTawwab 2005;Offem et al 2009). However, the efficiency of a predator fish is determined by its capacity to prey upon the recruits of Nile tilapia (de Graaf et al 1996;Hernández et al 2014).…”

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confidence: 99%

“…African sharptooth catfish (Clarias gariepinus, Burchell) is one of the commonly used predators in controlling recruits in mixed-sex Nile tilapia culture (Lin and Diana 1995;de Graaf et al 1996). Stocking African sharptooth catfish at a proper size reduces the number of recruits in mixed-sex culture of Nile tilapia, enhances growth performance and produces large marketable Nile tilapia sizes due to adequate food and space (Offem et al 2009).…”

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confidence: 99%

“…Stocking African sharptooth catfish at a proper size reduces the number of recruits in mixed-sex culture of Nile tilapia, enhances growth performance and produces large marketable Nile tilapia sizes due to adequate food and space (Offem et al 2009). It has been shown that, recruitment of Nile tilapia can be completely controlled by large (6.8-130 g) rather than small-size (\3.65 g) African sharptooth catfish (de Graaf et al 1996). However, in certain circumstances, African sharptooth catfish has been criticized as a lazy predator with a low predatory efficiency in controlling recruits in mixed-sex Nile tilapia (de Graaf et al 1996;Yi et al 2002;Ofor et al 2011).…”

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confidence: 99%

“…It has been shown that, recruitment of Nile tilapia can be completely controlled by large (6.8-130 g) rather than small-size (\3.65 g) African sharptooth catfish (de Graaf et al 1996). However, in certain circumstances, African sharptooth catfish has been criticized as a lazy predator with a low predatory efficiency in controlling recruits in mixed-sex Nile tilapia (de Graaf et al 1996;Yi et al 2002;Ofor et al 2011). This is due to the limited availability of appropriate large-sized African sharptooth catfish with optimum predation efficiency (Abdel-Tawwab 2005; ElNaggar 2007; Offem et al 2009).…”

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confidence: 99%

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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

et al. 2015

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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.

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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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

et al. 2015

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Ecological Basis of Tilapia Co‐culture Systems

Milstein

Hernández

2016

Tilapia in Intensive Co‐culture

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Current and Future Assisted Reproductive Technologies for Fish Species

Weber

Lee

2013

Current and Future Reproductive Technologies and World Food Production

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The Food and Agriculture Organization of the United Nations (FAO) estimates that in 2012 aquaculture production of fish will meet or exceed that of the capture fisheries for the first time. Thus, we have just turned the corner from a predominantly hunting gathering approach to meeting our nutritional needs from fish, to a farming approach. In 2012, 327 finfish species and five hybrids were covered by FAO aquaculture statistics, although farming of carps, tilapias, salmonids, and catfishes account for most of food-fish production from aquaculture. Although for most major species at least part of production is based on what might be considered domesticated animals, only limited production in most species is based on farming of improved lines of fish or is fully independent of wild seedstock. Consistent with the infancy of most aquaculture industries, much of the development and implementation of reproductive technologies over the past 100 years has been directed at completion of the life cycle in captivity in order to increase seed production and begin the process of domestication. The selection of species to farm and the emphasis of selective breeding must also take into account other ways to modify performance of an animal. Reproductive technologies have also been developed and implemented to affect many performance traits among fishes. Examples include technologies to control gender, alter time of sexual maturation, and induce sterilization. These technologies help take advantage of sexually dimorphic growth, overcome problems with growth performance and flesh quality associated with sexual maturation, and genetic containment. Reproductive technologies developed to advance aquaculture and how these technologies have been implemented to advance various sectors of the aquaculture industry are discussed. Finally, we will present some thoughts regarding future directions for reproductive technologies and their applications in finfish aquaculture.

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Recruitment control of Nile tilapia, Oreochromis niloticus, by the African catfish, Clarias gariepinus (Burchell 1822), and the African snakehead, Ophiocephalus obscuris. I. A biological analysis

Cited by 29 publications

References 15 publications

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

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

Ecological Basis of Tilapia Co‐culture Systems

Current and Future Assisted Reproductive Technologies for Fish Species

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