Optimum dietary crude protein requirement for juvenile cachama Piaractus brachypomus

Ciência Rural

Wálter Vásquez-torres²  Manoel Pereira-filho¹  Jose Alfredo Arias-castellanos² 

[1] ,Universidad de los Llanos Instituto de Aquicultura Vereda Barcelona Villavicencio ,Colombia

关键词: tropical fish;    protein requirements;    growth performance;    feed utilization;    whole-body composition;    peixe tropical;    níveis de proteína;    desempenho de crescimento;    utilização de alimento;    composição corporal;   

DOI  :  10.1590/S0103-84782011001200023

来源: SciELO

【 摘 要 】

A growth experiment was conducted to determine the optimal dietary protein requirement for juvenile cachama, Piaractus brachypomus. Six semi-purified isoenergetic experimental diets using casein and gelatin as protein sources were formulated to contain graded levels of protein (16, 20, 24, 28, 32 and 36%). Fish initially averaging 15.52±0.33g (mean±SD) were randomly distributed into the tanks (500L) as groups of 20 fish and fed to apparent satiation twice daily for 60 days. The results showed that feed consumption, feed conversion ratio, fish weight gain, specific growth rate, protein efficiency ratio and protein productive value were affected by dietary protein level (P<0.05) . No significant differences were observed in proximal composition of carcass (P<0.05) in response to dietary protein. Analysis of dietary protein level x WG with a second order polynomial regression suggested a requirement of 31.6% CP for optimum growth.

【 授权许可】

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