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| Mansano,Cleber Fernando Menegasso; De Stéfani,Marta Verardino; Pereira,Marcelo Maia; Macente,Beatrice Ingrid. |
| O objetivo deste trabalho foi determinar a deposição de nutrientes na carcaça de girinos de rã-touro (Lithobates catesbeianus) por meio de modelo não linear. Foram utilizados 2.700 girinos com peso médio inicial de 0,039 g. Ração comercial farelada com 55% de proteína bruta foi fornecida ad libitum. Os animais foram pesados e avaliados a cada dez dias para análise dos conteúdos de proteína bruta, extrato etéreo, água e sais minerais. Os parâmetros do modelo Gompertz foram estimados pelo método de Gauss-Newton modificado, e as taxas de deposição (g por dia) em função do tempo foram calculadas por meio da derivada da equação. Os valores encontrados para os parâmetros da equação de Gompertz, para descrever a deposição dos nutrientes na carcaça de girinos,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lithobates catesbeianus; Composição corporal; Modelo de Gompertz; Nutrição. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800014 |
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| Espitia-Manrique,Carmen Helena; Fernandes,João Batista Kochenborger; Sakomura,Nilva Kazue; Arias-Vigoya,Ángel Andrés; Nascimento,Thiago Matias Torres do; Silva,Edney Pereira da; Mansano,Cleber Fernando Menegasso. |
| ABSTRACT The objective of this study was to describe the growth of freshwater angelfish (Pterophyllum scalare) using the Gompertz model, determining the relative growth and allometric coefficients of body components in relation to body weight and protein weight. Six hundred animals were grown until 233 days of age. Data on chemical composition (water, lipid, protein, and ash) and weight measurements were obtained each 30 days. The Gompertz growth equation was used to analyze chemical allometry and to estimate growth parameters. The relationship between chemical components and body protein was estimated. Protein and body weight increased proportionally, with ash being the earliest nutrient (209.2 days), while lipid deposition occurred later. Linear... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometry; Growth curve; Ornamental fish. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000800631 |
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| Mansano,Cleber Fernando Menegasso; Stéfani,Marta Verardino De; Pereira,Marcelo Maia; Macente,Beatrice Ingrid. |
| Describing animal growth rate using non-linear models allows a detailed evaluation of growth behavior. Four non-linear models were used to fit weight gain and total length data of bullfrog (Lithobates catesbeianus) tadpoles, as follows: Gompertz, Y = A exp (-exp (-b (t-T))); Von Bertalanffy, Y = A (1 - K exp (-B t))³; Logistic, Y = A (1+ K exp (-B t))-1 and Brody, Y=A (1 - K exp (-B t)). We used 3,240 tadpoles, with average initial weight 0.044 g and average total length 12.79 mm, stage 25 Gosner. The measurements were conducted every ten days on 10% of the animals in every tank. The criteria used to select the model that best described the growth curve were: Residual Mean Square (RMS); determination coefficient (R²); residual graphical analysis; residual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Frog farm; Growth curve; Lithobates catesbeianus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400010 |
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