Effects of cadmium on aneuploidy and hemocyte parameters in the Pacific oyster, Crassostrea gigas

Aquatic Toxicology
Karine BouillySylvie Lapègue

Abstract

Pacific oysters, Crassostrea gigas, are commonly reared in estuaries where they are exposed to anthropogenic pollution. Much research has been made on the toxicity of cadmium to aquatic organisms because the compound recurrently contaminates their environment. Our study examined the influence of cadmium on aneuploidy level (lowered chromosome number in a percentage of somatic cells) and hemocyte parameters in C. gigas at different stages of life. Adults and juveniles were exposed to two different concentrations of cadmium. The first concentration applied was equivalent to a peak value found in Marennes-Oléron bay (Charente-Maritime, France; 50 ngL(-1)) and the second was 10 times higher (500 ngL(-1)). Exposure to 50 ngL(-1) cadmium caused a significant decrease in the survival time of C. gigas, but exposure to 500 ngL(-1) surprisingly affected the survival time positively. Significant differences in aneuploidy level were observed between the cadmium treatments and the control in adults but not in juveniles or the offspring of the adult groups. The effects of cadmium on hemocyte parameters were analyzed by flow cytometry. Several hemocyte parameters increased significantly after 21 days of cadmium exposure and subsequently decre...Continue Reading

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Citations

Oct 31, 2006·Archives of Environmental Contamination and Toxicology·Karine BouillySylvie Lapègue
Apr 6, 2011·Fish & Shellfish Immunology·R P EllisS Widdicombe
May 2, 2009·Ecotoxicology and Environmental Safety·Anne Bado-NillesHélène Thomas-Guyon
Dec 23, 2008·Developmental and Comparative Immunology·Hélène Thomas-GuyonTristan Renault
Jun 6, 2008·Toxicology in Vitro : an International Journal Published in Association with BIBRA·Anne Bado-NillesTristan Renault
May 5, 2011·Journal of Insect Physiology·Hong-Xia SunGu-Ren Zhang
Dec 25, 2009·Marine Pollution Bulletin·Ika Paul-PontXavier de Montaudouin
Nov 17, 2020·Fish & Shellfish Immunology·Antoine Le GuernicMélissa Palos Ladeiro

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