Abstract
We used 525 bullfrog tadpoles, distributed into 15 boxes with one tadpole per liter. The water was daily renewal (200%). The feeding regimes were constituted of five arrangements using seven commercial rations with levels of 22, 28, 32, 36, 40, 45 and 55% of crude protein (CP), supplied every 15 days. We used a random blocks design, subdivided plots with three replications. The subplots were constituted of five biometries: at the beginning of the experiment, at 15, 30, 45, and 60 days. The tadpoles submitted to feeding regime FR1, with 22, 32, 36, and 40% of CP, presented the highest consumption and the same performance as the others. Tadpoles that received FR5, with 40, 45, 45 and 50% of CP, presented greater weight, however, they showed smaller weight gain, greater consumption, conversion and mortality, indicating that this regime is expensive and not adequate for management. Feeding regimes FR2, with 28, 32, 36 and 40% of CP, and FR3, with 32, 36, 40 and 45% of CP, were more adjusted to this kind of management. Animals in all treatments showed higher performance that animals fed traditionally. KEYWORDS: bullfrog nutrition; nutritional requirement; protein.
Highlights
Na criação de girinos, a fase aquática da ranicultura é a base para a obtenção de bom resultado do ranário (ALBINATI et al, 2000), onde se registram grandes perdas e, ou, baixo desempenho dos animais, geralmente, apresentando sinais prováveis de deficiências nutricionais (SEIXAS FILHO, 2011a; BARBOSA et al, 2005); associados à qualidade da água, conforme já relatado por FONTANELLO et al (1982)
Feeding regimes FR2, with 28, 32, 36 and 40% of crude protein (CP), and FR3, with 32, 36, 40 and 45% of CP, were more adjusted to this kind of management
Tabela 4 – Ganho de peso e conversão alimentar aparente média de girinos de rã-touro alimentados com rações comerciais com diferentes teores de proteína bruta (PB) durante 60 dias
Summary
JOSÉ TEIXEIRA DE SEIXAS FILHO1, RODRIGO DIANA NAVARRO2, SILVANA LAGES RIBEIRO GARCIA3, ANA CAROLINA DA SILVA SANTOS4. Foram utilizados 525 girinos de rã-touro durante 60 dias, distribuídos em 15 caixas, com um girino por litro. Os regimes alimentares foram elaborados por meio de cinco arranjos elaborados com sete rações comerciais com níveis de 22, 28, 32, 36, 40, 45 e 55% de proteína bruta (PB), ministradas a cada 15 dias. Os girinos submetidos aos regimes alimentares RA1, com 22, 32, 36, e 40% de PB, apresentaram o maior consumo e o mesmo desempenho dos demais. Já os que receberam o RA5, com 40, 45, 45 e 50% de PB, apresentaram maior peso, mas o menor ganho de peso, maiores consumo, conversão e mortalidade, indicando que esses regimes oneram e não foram adequados ao manejo. Os regimes alimentares com 28, 32, 36 e 40% de PB e com 32, 36, 40 e 45% de PB foram mais adequados a esse tipo de manejo. FEEDING PROGRAMS FOR BULLFROG (Lithabates catesbeianus- Rana catesbeiana, Shaw 1802)
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