<b>Survival and growth of surubim <em>Pseudoplatystoma corruscans</em> (Pisces, Pimelodidae) larvae in different stocking densities</b> - DOI: 10.4025/actascianimsci.v28i2.653

Abstract

The aim of this study was to evaluate the survival and the growth of surubim Pseudoplatystoma corruscans larvae in five stocking densities: 15, 35, 55, 75 and 95 larvae/L, distributed in a completely randomized design with three repetitions. Brackish water (5%) was used in the cultivation. The larvae were cultivated without light and fed with 500 Artemia sp. nauplii/larvae/day. At the end of the experiment (10th day), the survival showed tendency to reduction with the increase of the stocking density, but a relationship between growth and density was not registered. The concentrations of non-ionized ammonia and nitrite varied proportionally to density increase and those concentrations probably influenced the final survival. The highest survival (52.0 ± 9.3%) was registered at 15 larvae/L, a density that did not produce negative effect on the quality of water.