RETENÇÃO DE MARCAS EM NADADEIRAS CORTADAS DE PACU Piaractus mesopotamicus (HOLMBERG, 1887)

Authors

  • Uwe Horst Schulz UNISINOS

Keywords:

Piaractus mesopotamicus, cortes de nadadeiras, marcação de grupos

Abstract

Two hundred and twenty pacu of 50.7 g medium weight were subjected to 11 combinations of adipose, ventral and pectoral fin-clipping. Within 130 days 65% of all fish which received a pectoral fin-clip, either in single cut or in combination with others, had regenerated to 100%. In 35% of the specimens which displayed still visible marks the regeneration process was almost complete (93%). In the group which was marked by ventral fin-clipping, 59% of the individuals showed no marks. In 41% marks were still detectable but had already regenerated to 92%. Of all pacu marked with adipose fin-clippings 99% were still detectable.

Author Biography

  • Uwe Horst Schulz, UNISINOS
    Possui graduação em Biologia - Universität Bielefeld (1985) e doutorado em Biologia - Universität Bielefeld (1995). Atualmente é professor adjunto da Universidade do Vale do Rio dos Sinos. Tem experiência na área de Ecologia, com ênfase em ecologia aquática, atuando principalmente nos seguintes temas: impactos ambientais em corpos hídricos, educação ambiental, migração de peixes, radiotelemetria de peixes e uso de habitat de peixes Currículo Lattes

Published

2008-07-23

Issue

Section

Biological Sciences