BULLFROG TADPOLES FED WITH DIFFERENT LEVELS OF CRUDE PROTEIN
DOI:
https://doi.org/10.5216/cab.v12i2.8029Keywords:
RanicultureAbstract
This study aimed at evaluating the performance of bullfrog tadpoles fed three levels of protein. Tadpoles were divided into 12 white boxes of polyethylene (62.5 x 40 x 16 cm) with a 40L capacity, which received 30L of water, receiving 30 animals, with average weight and length of 0.027 ± 0.009g and 4.91 ± 0.45mm, respectively, resulting in a density of 1 tadpole per liter. As for feeding, commercial diets were used with three levels of crude protein (CP), 22%, 24% and 28%, with a 0.5 mm diameter, administered at a rate of 10% of tadpoles weight distributed once a day at noon. The experimental design was completely randomized with four replications. The best percentage of survival, 94.87%, was found in the 22% CP group. The other groups, with 24% and 28% protein, showed 81.17% and 86.50% of survival rate, respectively. These results showed that the rations were not sufficient to provide a complete performance to the animals. Similarities regarding crude protein were observed until the 15th day among all the groups studied. However, there are some special physiological necessities, especially in relation to the protein intake, that were not well fulfilled despite the animals´good performance showed in this period.
KEYWORDS: frog culture; performance; protein; tadpoles.
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