PRODUÇÃO DE LARVAS DE CURIMBATÁ (Prochilodus scrofa) SUBMETIDAS A DIFERENTES DENSIDADES DE ESTOCAGEM E NÍVEIS DE PROTEÍNA BRUTA NAS DIETAS
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Data
2001-02-01
Autores
Koberstein, Teresa Cristina Ribeiro Dias [UNESP]
Durigan, João Guilherme
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Editor
Universidade Federal de Santa Maria (UFSM)
Resumo
O gênero Prochilodus é amplamente distribuído pela América do Sul, incluindo várias espécies que apresenta certo grau de endemismo nas diferentes bacias. Essas espécies alimentam-se basicamente de detritos orgânicos, organismos do benton, e alimentações artificiais. O objetivo deste estudo foi testar três densidades de estocagem (0,5, 0,75, e 1 larva/litro) e dietas contendo dois níveis diferentes de proteína bruta (35 e 40% PB) nos parâmetros do crescimento e na taxa da sobrevivência do curimbatá, Prochilodus scrofa. As larvas foram estocadas em aquários experimentais de 100 litros, mantidos com volume de 60 litros, com o fluxo de água contínuo, proveniente de poço semi-artesiano. A maior média foi proporcionada pela ração com 40% de PB (1,66g ± 0,21). As diferenças foram significativas para os efeitos dos teores de PB sobre o ganho de peso e densidades de estocagem, na sobrevivência das larvas. Para o ganho de peso, as melhores médias foram obtidas com nível de 40% de PB (2,50g ± 0,40) e para a sobrevivência, as melhores taxas foram 94,45% ± 19,32 e 78,87% ± 19,32 nas densidades de 0,5 e 0,75 larvas/litro, respectivamente.
Fish of the genus Prochilodus is widely spread in South America, showing endemic characteristics in some basins. It feeds basically on organic detritus, benton organisms, and artificial feeds. The purpose of this study was to test three stocking densities (0.5, 0.75, and 1 fry/L) and diets with two different crude protein levels (35 and 40% CP) on the growth parameters and survival rate of curimbatá, Prochilodus scrofa. Larvae were stocked in 100L aquaria containing 60L, supplied with continuous water flow coming from an artesian well. There was a significant effect (P<0.05) of the 40% CP diet on growth (body weight = 1.66g ± 0.21) of fish stocked at 0.5 fry/L, at the 30th experimental day. At the 68th day, fish fed the 40% CP diet achieved the highest (P < 0.05) final body weight (2.50g ± 0.40), and fish stocked at the densities 0.5 and 0.75 fry/L showed the highest survival rate, 94.45% ± 19.32 and 78.87% ± 19.32, respectively. Our results suggest that larvae curimbata may be fed exclusively with artificial diet after nine days-old.
Fish of the genus Prochilodus is widely spread in South America, showing endemic characteristics in some basins. It feeds basically on organic detritus, benton organisms, and artificial feeds. The purpose of this study was to test three stocking densities (0.5, 0.75, and 1 fry/L) and diets with two different crude protein levels (35 and 40% CP) on the growth parameters and survival rate of curimbatá, Prochilodus scrofa. Larvae were stocked in 100L aquaria containing 60L, supplied with continuous water flow coming from an artesian well. There was a significant effect (P<0.05) of the 40% CP diet on growth (body weight = 1.66g ± 0.21) of fish stocked at 0.5 fry/L, at the 30th experimental day. At the 68th day, fish fed the 40% CP diet achieved the highest (P < 0.05) final body weight (2.50g ± 0.40), and fish stocked at the densities 0.5 and 0.75 fry/L showed the highest survival rate, 94.45% ± 19.32 and 78.87% ± 19.32, respectively. Our results suggest that larvae curimbata may be fed exclusively with artificial diet after nine days-old.
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Palavras-chave
curimbatá, densidade de estocagem, Prochilodus scrofa, proteína bruta, curimbatá, stocking density, crude protein, Prochilodus scrofa
Como citar
Ciência Rural. Universidade Federal de Santa Maria (UFSM), v. 31, n. 1, p. 123-127, 2001.