Physiological responses to acute temperature increase in European eels Anguilla anguilla infected with Anguillicola crassus

Diseases of Aquatic Organisms

Matthew J. Gollock¹  Clive R. Kennedy J. Anne Brown¹ 

关键词: Anguillicola crassus;    Anguilla anguilla;    Temperature;    Stress;    Cortisol;    Glucos;   

DOI  :  10.3354/dao064223

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: The swimbladder parasite, Anguillicola crassus has infected, and spread rapidly, through European eel Anguilla anguilla (L.) populations over the past 20 to 25 yr. Our aim in the present studies was to elucidate whether thepresence of A. crassus in these eels alters their rapid physiological responses to an acute temperature increase, compared to the response of uninfected fish. Both infected and uninfected fish showed significant increases in plasma cortisol after 2h at a raised environmental temperature with increased plasma glucose after 6 h. However, infected eels exhibited a slight lag in glucose mobilisation, which may be due to the metabolic cost of harbouring a sanguiverous parasite. Both infected anduninfected fish showed a significant increase in haematocrit after 6 h of temperature elevation, but only uninfected fish exhibited a significant increase in haemoglobin at this point. However, there were no significant changes in mean erythrocytehaemoglobin concentration in either group. Our results suggest that acute temperature increase alone is unlikely to cause significant mortality of A. crassus-infected European eels; however, the effects of chronic increases in temperature incombination with other factors such as toxicants and hypoxia requires examination.

【 授权许可】

Unknown