Toxicidade aguda do mercúrio para tilápia-do-Nilo, Oreochromis niloticus

Autores

  • Nilton Massuo Ishikawa Pós-Graduando - Centro de Aquicultura da UNESP
  • Maria José Tavares Ranzani-Paiva Pesquisador Cientí­­fico - Instituto de Pesca/APTA/SAA, SP
  • Julio Vicente Lombardi Pesquisador Cientí­­fico - Instituto de Pesca/APTA/SAA, SP

Palavras-chave:

mercúrio, tilápia-do-Nilo, Oreochromis niloticus, toxicidade

Resumo

Este trabalho relata a concentração letal média (CL50-96h) de mercúrio para tilápia-do-Nilo, Oreochromis niloticus, estimada através do teste semiestático de toxicidade aguda realizado com cloreto de mercúrio (HgCl2). O teste foi conduzido no laboratório de Toxicologia Aquática do Instituto de Pesca - SP, em condições controladas de temperatura (24,4 ± 2,25°C) e fotoperí­­odo (10L:14D). Alevinos (2,46 ± 0,21 cm e 0,41 ± 0,12 g) foram mantidos durante 96 horas em aquários de 5 litros, de acordo com as seguintes concentrações de mercúrio, conduzidas em triplicata: 0,00 (controle); 0,037; 0,185; 0,370; 0,740; 0,925 mg Hg L-1. O valor de CL50-96h foi estimado em 0,220 mg Hg L-1.

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2018-10-30

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Nota cientí­­fica (Short Communication)

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