Acute toxicity of mercury (HgCl2) to Nile tilapia, Oreochromis niloticus

Authors

  • 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

Keywords:

mercury, Nile tilapia, Oreochromis niloticus, toxicity

Abstract

This paper reports the median lethal concentration (LC50-96h) of mercury to Nile tilapia, Oreochromis niloticus, estimated through semi-static acute toxicity test developed with mercury chloride (HgCl2 ). The experiment was carried out in the Aquatic Toxicology Laboratory - Instituto de Pesca, SP, under controlled conditions of temperature (24.4±2.25 0 C) and photoperiod (10L:14D). Fingerlings (2.46±0.21 cm and 0.41±0.12 g) were kept during 96 hours in 5-liter glass aquaria, according to the following mercury concentrations, set up in three replicates: 0.00 (control), 0.037, 0.185, 0.370, 0.740, 0.925 mg Hg L-1. The value of LC50-96h was estimated in 0.220 mg Hg L-1.

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Published

2018-10-30

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