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Effects of water hardness and temperature on the acute toxicity of mercuric chloride on rainbow trout (Oncorhynchus mykiss)/title        
Yazarlar
Doç. Dr. Ertuğrul TERZİ
Recep Tayyip Erdoğan Üniversitesi, Türkiye
Bülent Verep
Recep Tayyip Erdoğan Üniversitesi, Türkiye
Özet
In this study, the toxicity of mercuric chloride (HgCl2), an important pollutant threatening water resources for many years, and the effects of water temperature and hardness on the toxicity in cultured rainbow trout Oncorhynchus mykiss (4.79 ± 0.16 g; 7.38 ± 0.24 cm; mean ± SD) were investigated at different temperatures (12 and 17°C) and hardness concentrations (35, 70 and 120 mg l-1 as calcium carbonate, CaCO 3). For this purpose, the acute toxicity tests were performed by 96-h static tests in different water temperatures and water hardness concentrations. For acute toxicity tests, solutions ranging from 0.4 to 1.2 mg l-1 were used at 12°C and solutions ranging from 0.4 to 1.0 mg l-1 at 17°C. The LC50 values of HgCl2 that killed 50% of rainbow trout within 96 h in the hardness concentrations of 35, 70 and 120 mg l-1 CaCO3 were calculated using probit analysis, and were found to be 0.725, 0.788, 0.855 mg l-1 at 12°C and 0.670, 0.741, 0.787 mg l-1 at 17°C, respectively. Consequently, the toxicity of HgCl2 on rainbow trout decreased when the temperature decreased from 17 to 12°C. Toxicity increased when the hardness decreased from 120 to 35 mg l-1 CaCO3. In contrast to temperature, water hardness presents a negative effect on the toxicity of HgCl2. © The Author(s) 2011.
Anahtar Kelimeler
hardness | Mercuric chloride | rainbow trout | temperature | toxicology
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı TOXICOLOGY AND INDUSTRIAL HEALTH
Dergi ISSN 0748-2337
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 07-2012
Cilt No 28
Sayı 6
Sayfalar 499 / 504
Doi Numarası 10.1177/0748233711416943
Makale Linki http://journals.sagepub.com/doi/10.1177/0748233711416943