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Individual variability in the movement behaviour of juvenile Atlantic salmon

Title:

Individual variability in the movement behaviour of juvenile Atlantic salmon

Roy, Mathieu L., Roy, André G., Grant, James W.A. and Bergeron, Normand E. (2013) Individual variability in the movement behaviour of juvenile Atlantic salmon. Canadian Journal of Fisheries and Aquatic Sciences, 70 (2). pp. 339-347. ISSN 0706-652X

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Official URL: http://dx.doi.org/10.1139/cjfas-2012-0234

Abstract

Stream-dwelling salmonid populations are generally thought to be composed of both relatively mobile and sedentary individuals, but this conclusion is primarily based on results obtained from recapture methods with low temporal resolution. In this study, the mobility of 50 juvenile Atlantic salmon was monitored using a large array of passive integrated transponder antennas buried in the bed of a natural stream. Fish locations were recorded at a high frequency for a period of three months in a 65 m reach. Four types of daily behaviour were identified: stationary (detected primarily at one location), sedentary (limited movement between a few locations), floater (frequent movements in a restricted home range) and wanderer (movements across the reach). Most individuals exhibited low mobility on most days, but also showed occasional bouts of high mobility. Between-individual variability accounted for only 12-17% of the variability in the mobility data. High mobility was more frequent at low flow, but no difference was observed between the summer (12-18oC) and the autumn (4-12oC). Individual variation on a daily basis suggested that movement behaviour is a response to changing environmental conditions rather than an individual behavioural trait.

Divisions:Concordia University > Faculty of Arts and Science > Biology
Item Type:Article
Refereed:Yes
Authors:Roy, Mathieu L. and Roy, André G. and Grant, James W.A. and Bergeron, Normand E.
Journal or Publication:Canadian Journal of Fisheries and Aquatic Sciences
Date:2013
Digital Object Identifier (DOI):10.1139/cjfas-2012-0234
Keywords:Juvenile salmon, Mobility, Individual variability, Behaviour, Habitat
ID Code:977275
Deposited By: JAMES GRANT
Deposited On:14 May 2013 13:23
Last Modified:18 Jan 2018 17:44
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