<b>Cannibalism among larvae of <em>Pseudoplatystoma corruscans</em> bred under different stockage densities</b> - DOI: 10.4025/actascibiolsci.v26i3.1543

Abstract

The development, survival and cannibalism among larvae of the pintado, Pseudoplatystoma corruscans (Pimelodidae) are verified. Larvae were confined at different stockage densities in lab conditions. The experiment was developed at the Aquaculture Lab of the State University of Maringá, during 72 hours, with 500 larvae aged 96 hours, initial weight 2.2 ± 0.3mg. Larvae were distributed in an entirely randomized design with four treatments and five repetitions, in 700mL-containers, at densities varied 14, 28, 42 and 56 larvae per L. Natural mortality, mortality by intraspecies predation and final weight were the variables analyzed. After finished, density increase affected negatively the larvae’s development. It also caused a linear increase in mortality rates and in cannibalism among the animals. Increase in concentration of pintado larvae was proportional to decrease in performance and in survival rate