Produção da tilápia do Nilo, Oreochromis niloticus (L, 1758), linhagem Chitralada, de pequeno porte, em tanques-rede visando o atendimento de comunidades carentes

• Autor(a) principal: GODOY, Carlos Eduardo Mariano de
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRPE
• Texto Completo: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6248
• topic: Tilápia do Nilo; Viveiro; Tanque-rede; Nile tilapia; Tank network; CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA

Aquaculture development, in a global level, must be seen like pattern to improve and assure the food security, as well as additional income to families resident in rural region, bettering your social economics conditions. This research aimed reduce culture time of Nile tilapia, to obtain exemplars with average weight around 300-400g to offer for needy communities. Two experiments was performed with two treatments (300 and 400 fish/m³) and two repetitions. The first was executed in 77 days on Paulo Afonso Pisciculture Station, located on city of Paulo Afonso – BA, where the cages was installed on a pond and the second in 65 days in Demonstrative Unity of Cage Culture, located in Xingó Hydro Eletric Power Station Reservoir, in city of Piranhas – AL, where the same cages was installed on Reservoir of Xingó Power Station, to verify the influence of environment and physicochemical variable on the duration of the cycle and somatic growth of tilapia. Fish growth, in both experiments, was attended by mensal biometry sampling 10% biomass of each cage. In the experiment performed in Paulo Afonso, fish average weight varied between 366.2 ± 18.19 e 458.8 ± 31.42 g. During this experiment, dissolved oxygen (DO) concentration reached criticallevels of concentration, and in the last 18 days of culture, DO always be equal or less than 2 mg/L. In the experiment 2, performed in Xingó, fish average weight varied between 390 ± 14.81 e 467.3 ± 15.68 g and DO was always higher than 7 mg/L. The reduction of culture time was technically viable in both experiments, however in Xingó the fish development was superior.