Breadcrumb

 
 

Conspecific skin extracts elicit antipredator responses in juvenile rainbow trout (Oncorhynchus mykiss)

Title:

Conspecific skin extracts elicit antipredator responses in juvenile rainbow trout (Oncorhynchus mykiss)

Brown, Grant E. and Smith, Jan F. (1997) Conspecific skin extracts elicit antipredator responses in juvenile rainbow trout (Oncorhynchus mykiss). Canadian Journal of Zoology, 75 (11). pp. 1916-1922. ISSN 0008-4301

[img]
Preview
PDF - Published Version
589Kb

Official URL: http://dx.doi.org/10.1139/z97-821

Abstract

We investigated, under laboratory conditions, the presence of chemical alarm signals in juvenile rainbow trout (Oncorhynchus mykiss). In an initial experiment, we exposed trout to a whole-body extract from conspecifics or a distilled-water control. When exposed to whole-body extract, trout significantly (i) decreased time spent swimming, (ii) increased time taken to resume foraging, and (iii) decreased the number of food items eaten. These data indicate a significant chemically mediated antipredator response. A second experiment was conducted to determine (i) if this is a generalized response to injured fish or a specific response to injured conspecifics, and (ii) if the chemical signal is localized in the skin. We exposed juvenile trout to one of three chemical stimuli: (1) trout skin extract, (2) trout body extract, or (3) swordtail (Xiphophorus helleri) skin extract. Significant antipredator responses were observed in trout exposed to conspecific skin extract, but responses of those exposed to conspecific body extract or swordtail skin extract did not differ from those of distilled-water controls. These data strongly suggest that juvenile rainbow trout possess a chemical alarm signal, localized in the skin, that elicits antipredator behaviour when detected.by conspecifics.

Divisions:Concordia University > Faculty of Arts and Science > Biology
Item Type:Article
Refereed:Yes
Authors:Brown, Grant E. and Smith, Jan F.
Journal or Publication:Canadian Journal of Zoology
Date:November 1997
Funders:
  • Government of Canada Department of Fisheries and Oceans
  • Natural Sciences and Engineering Research Council
  • University of Saskatchewan
ID Code:6733
Deposited By:DANIELLE DENNIE
Deposited On:18 Jun 2010 14:36
Last Modified:08 Dec 2010 18:14
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Document Downloads

More statistics for this item...

Concordia University - Footer