Temperature influence on the development of juvenile of Piapara (Leporinus cf. obtusidens) - DOI: 10.4025/actascibiolsci.v25i1.2103

Abstract

The aim of this study was to analyze temperature effects on the performance of juveniles Leporinus cf. obtusidens (Valencienves, 1847) (Characiformes, Anostomidae), on the variation of the total length, total body weight, weight increase, relative weight and instantaneous growth rate. For this reason, from August to September of 2001, an experiment with controlled temperature (± 1ºC) was set up at 14, 18, 22, 26, 30 and 34ºC, with 5 repetitions each one. Twelve juveniles piapara were placed at random in each aquarium of 250L capacity, and fed with commercial food. We observed that the greatest temperature which provided larger total length, body weight, weight increase was between 26 and 30ºC; the best thermal comfort was between 22 to 26ºC; the instantaneous growth rate increased gradually and the temperature ranged from 14 to 30ºC, when it began to decrease. Therefore, we found that temperature influenced all the analyzed variables