전자저널 > 전자저널 > Changes of Mortality, Oxygen Consumption Rate and Organ Structurein the Oyster Crassostrea gigas Exposed to Lead

Changes of Mortality, Oxygen Consumption Rate and Organ Structurein the Oyster Crassostrea gigas Exposed to Lead

Yun Kyung Shin, Sun Mi Ju, Jung Jun Park, Young Guk Jin, Hyun Sig Lim and Jung Sick Lee

Southeast Sea Fisheries Research Institute, NIFS, Tongyeong 39768, Korea Department of Aqualife Medicine, Chonnam National University, Yeosu 59626, Korea South Sea Fisheries Research Institute, NIFS, Yeosu 59780, Korea Department of Marine and Fisheri

This study was conducted to find out biological response of the oyster Crassostrea gigas exposed to lead (Pb). Experimental period was four weeks. Experimental groups were composed of one control condition and three lead exposure conditions (0.20, 0.40 and 0.80 mg/L). The results of the study confirmed that lead induces reduction of survival rate and oxygen consumption rate and degeneration of organ structure of the bivalve. Oxygen consumption rate was observed exposure groups lower than control decline by 15%-55%. Histological analysis of organ system illustrated expansion of hemolymph sinus, degeneration of epithelial layer and connective tissue layer of the mantle. Also, epithelial degeneration and disappearance of cilia band are recognized in the gill filament and it was observed disruption of epithelial layer and degeneration of basophilic cell and epithelial cell in the digestive tubules.

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