Feeding of juvenile cobia, Rachycentron canadum: Evaluation of practical feeds, comparison of commercial fishmeal replacers, and estimation of essential amino acid requirements

Autor(es)

Raggi, Thiago ^[1] ; Tacon, Albert G. J. ^{[2, 1]} ; Lemos, Daniel ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Oceanog Inst, Aquaculture Lab LAM, Sao Paulo - Brazil

^[2] Aquat Farms Ltd, Kaneohe, HI - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE WORLD AQUACULTURE SOCIETY; v. 50, n. 2, p. 317-335, APR 2019.
• Citações Web of Science: 0

Resumo

Three studies were conducted with juvenile cobia, Rachycentron canadum: (Study 1) a 10-week feeding trial within floating net cages to test the nutritional efficacy of different dietary feeding regimes (trash-fish control diet, a semimoist diet, an in-house dry formulated diet, and a commercial cobia feed); (Study 2) a 10-week feeding trial within an indoor water-recirculating tank-based system to test the nutritional efficiency of different potential dietary fishmeal replacers (poultry byproduct meal, soy protein concentrate, feather meal), a diet without taurine supplementation, and a commercial cobia feed; and (Study 3) estimation of the essential amino acid (EAA) requirements of cobia based on EAA whole-body composition in fast-growing cobia fed a trash-fish-based diet. Fish performance in terms of growth and feed efficiency was the greatest within the outdoor net-cage feeding trial, with fish fed the control trash-fish-based diet exhibiting the best performance. Although fish growth was poorer within the indoor feeding trials, fish performance was similar for most diets, with apparent crude protein digestibility coefficients of over 75% being obtained in all experimental diets in both feeding trials. The estimated EAA requirements of cobia obtained during this study were similar to those reported for other similar marine carnivorous fish species. (AU)

• Processo FAPESP: 14/04164-0 - Alimentos para a criação de camarões marinhos: o desempenho combinado à digestibilidade da proteína alimentar como critérios para a avaliação e o desenvolvimento de dietas
• Beneficiário: Daniel Eduardo Lavanholi de Lemos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/10772-9 - Criação do bijupirá (Rachycentron canadum) no litoral Sudeste do Brasil (SP, RJ) durante a fase de engorda: alimentação e nutrição, interações com o ambiente e a economia em modelos existentes (PeixeMar)
• Beneficiário: Daniel Eduardo Lavanholi de Lemos
• Modalidade de apoio: Auxílio à Pesquisa - Regular