The Open Fish Science Journal

2013, 6 : 99-106
Published online 2013 December 12. DOI: 10.2174/1874401X01306010099
Publisher ID: TOFISHSJ-6-99

Thermal Stress Effects on Gene Expression and Phagocytosis in the Common Carp (Cyprinus Carpio): a Better Understanding of the Summer 2001 st. Lawrence River Fish Kill

Valérie Ouellet , Fabien Pierron , Marc Mingelbier , Michel Fournier , Marlène Fournier and Patrice Couture
INRS – Centre Eau Terre Environnement, 490 de la Couronne, Québec, G1K 9A9, Canada.

ABSTRACT

In summer 2001, the St. Lawrence River (Québec, Canada) experienced perhaps the largest massive fish kill of its history, with more than 25 000 carp (Cyprinus carpio) found dead. This experiment therefore investigated the effects of heat stress on the gene transcription level of heat shock protein 70, cytochrome c oxidase and mitochondrial superoxide dismutase expression as well as on phagocytosis of kidney cell suspensions and animal behaviour. Our study suggests that in summer 2001, elevated water temperatures could have contributed to the fish kill through immunosuppression during an already stressful spawning period.

Keywords:

Fish kill, Gene expression, Phagocytosis.