Effects of methylmercury on beluga (Huso huso) bioenergetics

Gharaei, A., Department of Fisheries, Faculty of Natural Resource and Marine Science, Tarbiat Modares University, Noor, Mazandaran, Iran; Esmaili-Sari, A., Department of Fisheries, Faculty of Natural Resource and Marine Science, Tarbiat Modares University, Noor, Mazandaran, Iran; Akrami, R., Azad University of Azadshahr, Department of Fisheries; Nazeri, M. R., Golestan Fisheries Organization, Gorgan, Golestan, Iran

Effects of methylmercury on beluga (Huso huso) bioenergetics

2009

Gharaei, A., Department of Fisheries, Faculty of Natural Resource and Marine Science, Tarbiat Modares University, Noor, Mazandaran, Iran | Esmaili-Sari, A., Department of Fisheries, Faculty of Natural Resource and Marine Science, Tarbiat Modares University, Noor, Mazandaran, Iran | Akrami, R., Azad University of Azadshahr, Department of Fisheries | Nazeri, M. R., Golestan Fisheries Organization, Gorgan, Golestan, Iran

This study carried out in Shahid Marjani farm of Golstan province in autumn 2006. The aim of study was to investigate the effects of organic mercury on beluga (Huso huso) bioenergetics. In practice, four treatment groups of beluga juveniles were exposed to four dietary with MeHg: 1- Control group (0.04 mg/kg) 2- Low dose group (0.76 mg/kg) 3- Medium dose group (7.8 mg/kg) 4- High dose group (16.22 mg/kg) during 70 days. After 42 days, all individuals of high treatment died. There were not significant differences (p ; 0.05) in Food Consumption Rate (FCR) among the treatment groups. By 35 days the high dose treatment group and by 70 days the medium dose treatment group had significantly depressed growth rate when compared to the control group (p > 0.05). The high dose group at 35 days and the medium dose group at 70 days had significantly (p 0.05) lower specific growth rate (SGR) compared all other treatment groups. Keywords: Methylmercury, Food Consumption Rate (FCR), Specific Growth Rate (SGR), Beluga (Huso huso), Caspian Sea.

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