Data/hora: 09/06/2024 17:57:30

Provedor de dados: | 64
País: | Brazil
Título: | Growth in weight and of some tissues in the bullfrog: fitting nonlinear models during the fattening phase
Autores: | Pereira,Marcelo Maia; Mansano,Cleber Fernando Menegasso; Silva,Edney Pereira da; Stéfani,Marta Verardino De.
Data: | 2014-12-01
Ano: | 2014
Palavras-chave: | Frog farming; Growth curves; Growth rate; Logistic model.
Resumo: | Knowledge of the growth of animals is important so that zootechnical activity can be more accurate and sustainable. The objective of this study was to describe the live weight, development of liver tissue and fat body, leg growth, and cumulative food intake of bullfrogs during the fattening phase using nonlinear models. A total of 2,375 bullfrog froglets with an initial weight of 7.03 ± 0.16 g were housed in five fattening pens (12 m²). Ten samplings were performed at intervals of 14 days to obtain the variables studied. These data were used to estimate the parameters of Gompertz and logistic models as a function of time. The estimated values of weight (Wm) and food intake (FIm) at maturity and time when the growth rate is maximum (t*) were closer to expected values when the logistic model was used. The Wm values for live weight and liver, adipose and leg weights and the FIm value for food intake were 343.7, 15.7, 19.6, 96.03 and 369.3 g, respectively, with t* at 109, 98, 105, 109 and 107 days. Therefore, the logistic model was the best model to estimate the growth and food intake of bullfrogs during the fattening phase.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000600009
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/S1413-70542014000600009
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.38 n.6 2014
Fonte: | info:eu-repo/semantics/openAccess