Logotipo do repositório
 

Publicação:
NUTRIENT DEPOSITION IN BULLFROGS DURING THE FATTENING PHASE

Carregando...
Imagem de Miniatura

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Inst Pesca

Tipo

Artigo

Direito de acesso

Acesso restrito

Resumo

Descriptions of nutrient deposition are important to determine the nutritional requirements of animals. The objective of this study was to describe nutrient deposition in the body and legs and the dietary intake of protein and fat of bullfrogs during the fattening phase using Gompertz and logistic models, and to evaluate feed efficiency. A total of 2,375 froglets with an initial weight of 7.03 +/- 0.16 g were housed in five fattening pens. The animals were fed a commercial diet containing 40% crude protein. Frogs and their legs were weighed and sampled at intervals of 14 days for the determination of nutrient composition. On the basis of the model selection criteria, the logistic model was the most adequate to describe nutrient deposition in the body and legs of bullfrogs and the dietary intake of protein and fat. With respect to nutrient deposition in the body, the estimated values for nutrient weight at maturity (Wm) and the time when the maximum rate of deposition was attained (t*) were 244.3 g and 106 days, 55.2 g and 113 days, 30.9 g and 124 days, and 8.6 g and 99 days for water, protein, fat and ashes, respectively. For nutrient deposition in the legs, these values were 77.6 g and 111 days, 14.5 g and 104 days, 1.4 g and 86 days, and 3.7 g and 119 days, respectively. The protein efficiency of the bullfrog diet was low (36.76%), whereas the efficiency of fat utilization was high (140.9%), indicating the need to develop an ideal diet for bullfrogs.

Descrição

Palavras-chave

Lithobates catesbeianus, fat deposition, logistic, protein deposition

Idioma

Inglês

Como citar

Boletim Do Instituto De Pesca. Sao Paulo: Inst Pesca, v. 41, n. 2, p. 305-318, 2015.

Itens relacionados

Unidades

Departamentos

Cursos de graduação

Programas de pós-graduação