Significance of initial weight of post-metamorphosis froglets for growth and fattening of Rana perezi Seoane, 1885, raised in captivity

Álvarez, Rafael; Real, M.

doi:10.1016/j.aquaculture.2005.12.026

Cited by 11 publications

(4 citation statements)

References 8 publications

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“…In the 1980s, a diet intercropped with Musca domestica larvae was introduced for the feeding of post-metamorphic bullfrogs (ÁLVAREZ & REAL, 2006 The elaboration of a diet that meets the nutritional needs of animals requires knowledge about the digestibility of foods (FURUYA, 2010), which is defined as the part of a food or nutrient that disappears through absorption in the digestive tract and is not present in feces (SAKOMURA & ROSTAGNO, 2007). Digestibility assays have determined the metabolizable energy of some foods using the method of force-feeding and combined collection of total feces and water in the boxes in which the animals were kept (CASTRO et al, 2001;RODRIGUES et al, 2004).…”

Section: A Avaliação De Metodologias Adequadas Para a Determinação Damentioning

confidence: 99%

Fecal collection methods for the determination of protein digestibility in bullfrogs

et al. 2015

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Section: A Avaliação De Metodologias Adequadas Para a Determinação Damentioning

confidence: 99%

Fecal collection methods for the determination of protein digestibility in bullfrogs

et al. 2015

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“…In this respect, tadpole production is an important step since it is an intermediate phase of the bullfrog life cycle (Mansano et al, 2012) and precedes a critical period, i.e., metamorphosis (Scott et al, 2007). Furthermore, after metamorphosis, the froglet weighs less than the tadpole at the climax of metamorphosis (Stamper et al, 2009), and the heavier the froglet, the better will be its fattening performance (Álvarez and Real, 2004).…”

Section: Introductionmentioning

confidence: 99%

Optimal digestible protein level for bullfrog tadpoles

et al. 2015

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“…For example, in the afternoon when the temperatures were high, the frogs were found inside the water trough where temperatures were milder. There are other factors that can also influence the growth of frogs, such as initial animal weight Real, 2006) and whether the animals are adapted to ration (Real et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

Growth in weight and of some tissues in the bullfrog: fitting nonlinear models during the fattening phase

et al. 2014

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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 m 2 ). 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 (W m ) and food intake (FI m ) at maturity and time when the growth rate is maximum (t*) were closer to expected values when the logistic model was used. The W m values for live weight and liver, adipose and leg weights and the FI m 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.Index terms: Frog farming, growth curves, growth rate, logistic model. RESUMOO conhecimento do crescimento dos animais é importante para a atividade zootécnica ser mais precisa e sustentável. O objetivo do estudo foi descrever o crescimento em peso vivo, dos tecidos hepático e adiposo, da coxa e o consumo alimentar acumulado da rã-touro na engorda, através de ajuste de modelos não lineares. Foram utilizados 2.375 imagos de rã-touro com peso inicial de 7,03±0,16g, os quais foram alojados em cinco baias de engorda com 12 m 2 . Foram realizadas 10 amostragens, a cada 14 dias, para obtenção das variáveis estudadas. Os dados amostrados foram utilizados para estimar os parâmetros dos modelos de Gompertz e Logístico em função do tempo. Os valores estimados de peso (Pm) e consumo à maturidade (Cm) e tempo em que a taxa de crescimento é máxima (t*) dos parâmetros avaliados foram mais próximos do esperado no modelo Logístico. Os valores de Pm para peso vivo, tecido hepático e adiposo, coxas e Cm para consumo alimentar foram 343,7 g; 15,7g; 19.6g; 96,03 e 369,3g, respectivamente, com t* aos 109, 98, 105, 109 e 107 dias, respectivamente. Portanto, o modelo Logístico foi a melhor ferramenta para estimar o crescimento e o consumo alimentar da rã-touro na fase de engorda.Termos para indexação: Ranicultura, curvas de crescimento, taxa de crescimento, logístico.

show abstract

Significance of initial weight of post-metamorphosis froglets for growth and fattening of Rana perezi Seoane, 1885, raised in captivity

Cited by 11 publications

References 8 publications

Fecal collection methods for the determination of protein digestibility in bullfrogs

Fecal collection methods for the determination of protein digestibility in bullfrogs

Optimal digestible protein level for bullfrog tadpoles

Growth in weight and of some tissues in the bullfrog: fitting nonlinear models during the fattening phase

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