Data/hora: 06/06/2024 06:41:44

Provedor de dados: | 63
País: | Brazil
Título: | Sustained swimming improves fish dietary nutrient assimilation efficiency and body composition of juvenile Brycon amazonicus
Autores: | Arbeláez-Rojas,Gustavo Alberto; Moraes,Gilberto.
Data: | 2017-08-01
Ano: | 2017
Palavras-chave: | Benefits of exercise; Dietary protein; Nutrient retention; Optimal swimming speeds; Raceways.
Resumo: | ABSTRACT Sustained swimming (SS) usually promotes beneficial effects in growth and feed conversion of fishes. Although feed efficiency is improves at moderate water velocity, more information is required to determine the contributions of this factor on growth and body composition. Body composition and efficiency responses to the use of nutrients were determined in juvenile matrinxa Brycon amazonicus (Spix and Agassiz, 1829) fed with two dietary amounts of protein, 28 or 38% of crude protein (CP), and subjected to sustained swimming at a constant speed of 1.5 body lengths s−1 (BL s−1) or let to free swimming. The fish body composition under SS and fed with 28% of dietary protein showed 22% of increased in bulk protein and a 26% of decrease in water content in the white muscle. Red muscle depicted 70% less water content and a 10% more lipid. Nutrient retention was enhanced in fish subjected to SS and a higher gain of ethereal extract sustained was observed in the white muscle of exercised fish fed with 38% CP. The interaction between swimming and dietary protein resulted in a larger bulk of lipid in red muscle. Fish fed with 28% CP under SS at 1.5 BL s−1 presented the best utilization of dietary nutrients and body composition. Thus, this fish farming procedure is proposed as a promising management strategy for rearing matrinxa.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000400259
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/1678-992x-2016-0135
Formato: | text/html
Fonte: | Scientia Agricola  v.74 n.4 2017
Fonte: | info:eu-repo/semantics/openAccess