Lethal Chlorine Concentrations for the Pearl Oyster Pinctada radiata (Leach, 1814)

Authors: MÜNİR ZİYA LUGAL GÖKSU, FATMA ÇEVİK, ÖZLEM FINDIK

Abstract: In this study, the lethal chlorine concentrations (LC) and residual chlorine concentrations in water for a fouling organism, the pearl oyster Pinctada radiata (Leach, 1814) [Avicula], were investigated during May 1999-April 2000. The study was carried out under laboratory conditions at 20ºC. Acute toxicity tests were conducted under a flow through system by using continuous application of chlorine according to bioassay test methods. Test solutions were made by using an appropriate amount of sodium hypochlorite (NaOCl^{-}). According to the results, the 24h-LC_{50} was 1.75 mgl^{-1} and the residual chlorine was 0.47 mgl^{-1} for LC_{50} of Pinctada radiata.

Keywords: Pearl Oyster, Pinctada radiata, Bioassay, Acute Toxicity, LC_{50}, Residual Chlorine

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