Chemoreception in the salmon louse Lepeophtheirus salmonis: an electrophysiology approach

Diseases of Aquatic Organisms

D. M. Fields¹  M. J. Weissburg H. I. Browman¹ 

关键词: Lepeophtheirus salmonis;    Electrophysiology;    Olfaction;    Host finding;   

DOI  :  10.3354/dao01870

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: The search for effective and long-term solutions to the problems caused by salmon lice Lepeophtheirus salmonis (Krøyer, 1837) has increasingly included biological/ecological mechanisms to combat infestation. One aspect of this work focuses on the host-associated stimuli that parasites use to locate and discriminate a compatible host. In this study we used electrophysiological recordings made directly from the antennule of adult lice to investigate the chemosensitivity of L salmonis to putative chemical attractants from fish flesh, prepared by soaking whole fish tissue in seawater. There was a clear physiological response to whole fish extract (WFX) with threshold sensitivity at a dilution of 10^–4. When WFX was size fractionated, L. salmonis showed the greatest responses to the water-soluble fractions containing compounds between 1 and 10 kDa. The results suggest that the low molecular weight, water-soluble compounds found in salmon flesh may be important in salmon lice host choice.

【 授权许可】

Unknown