Avaliação econômica da alimentação de tilápias em tanques-rede com níveis de proteína e energia digestíveis

• Autor(a) principal: Koch, João Fernando Albers
• Data de Publicação: 2014
• Outros Autores: Esperancini, Maura Seiko Tsutsui [UNESP], Barros, Margarida Maria [UNESP], Carvalho, Pedro Luiz Pucci Figueiredo de [UNESP], Fernandes Junior, Ademir Calvo [UNESP], Teixeira, Caroline Pelegrina [UNESP], Pezzato, Luiz Edivaldo [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.pesca.sp.gov.br/sumario40_4.php; http://hdl.handle.net/11449/243314
• topic: Production cost; Fish nutrition; Oreochromis niloticus; Gross revenue; Benefit cost ratio; Custo de produção; Nutrição de peixes; Oreochromis niloticus; Receita bruta; Relação benefício custo

We evaluated the economic responses of Nile tilapia in the final stage (450 to 800 g) fed diets containing five levels of digestible protein (DP): 20, 23, 26, 29 and 32% and two digestible energy levels (DE): 3,000 and 3,300 kcal kg(-1) based on the sale of whole animals or fillet. This experiment was carried out into 50 m(3) net cages in an aquaculture area located in Paranapanema River, Palmital - Sao Paulo State, Brazil, from November 21st, 2010 to January 21st. Economic performance indicators were: gross revenue, partial production cost, net revenue, leveling point, balance point, benefit cost ratio and cost of feed kg(-1) gain. Twenty-nine percent of DP and 3,000 kcal DE kg(-1) diet provided better economic performance for sale of whole fish, meaning higher net revenue (R$ 23.09 net cage(-1)) and benefit cost ratio (1.08), besides the lowest balance point (R$ 3.91 kg-1). Thirty-two percent of DP and 3,000 kcal DE kg-1 diet provided the lowest cost of feed kg(-1) (R$ 2.53), leveling point (17.35 kg net cage(-1)) and balance point (R$ 13.63 kg(-1)), besides the highest benefit cost ratio (1.54) when the fish were sold in fillet form. Diets with 29% and diet with 32% digestible protein, both of them with 3,000 kcal of digestible energy kg(-1) diet provides better economic responses in Nile tilapia reared in net cages (450 to 800 g), to be sold, respectively, whole or fillets form.