RETENÇÃO DE MARCAS EM NADADEIRAS CORTADAS DE PACU <em>Piaractus mesopotamicus</em> (HOLMBERG, 1887)

  • Uwe Horst Schulz UNISINOS

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.

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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
Section
Biological Sciences