The University of Southampton
University of Southampton Institutional Repository

Do juvenile Atlantic salmon parr track local changes in water velocity?

Record type: Article

When given a choice of two flows and constant food availability, salmon parr should choose the lower flow if they are to optimize their net energy gain. In a two-choice test carried out in a recirculating flume, there was no significant selection for ranges of naturally occurring high (mean mid-column velocities of 19.5-25.2 cm s(-1)) or low (7.2-10.0 cm s(-1)) summer flows. To test whether this result might indicate that only a proportion of the population chose optimal flows, the positions of the flows were reversed. All fish that initially chose low flow remained site-attached when the flows were reversed. A significant proportion of the fish that initially chose high flow moved when the flows were reversed. Hence, there is no evidence that salmon can integrate energy costs and gains to optimize their feeding positions. However, the behaviour of some individual fish was consistent with a 'rule of thumb' of following high flows, which may improve foraging efficiency in natural streams above random in the long but not short term. The findings show that only a fraction of the parr in a population redistribute themselves in response to changes in discharge and therefore a fundamental assumption of some instream flow models is questioned.

Full text not available from this repository.

Citation

Kemp, P.S., Gilvear, D.J. and Armstrong, J.D. (2003) Do juvenile Atlantic salmon parr track local changes in water velocity? River Research and Applications, 19, pp. 569-575. (doi:10.1002/rra.727).

More information

Published date: 2003
Keywords: discharge, velocity, flume, optimal foraging, behaviour, salmo salar, parr, instream flow models

Identifiers

Local EPrints ID: 39472
URI: http://eprints.soton.ac.uk/id/eprint/39472
ISSN: 1535-1459
PURE UUID: 964daee8-d51b-4218-b643-26e9b738439e
ORCID for P.S. Kemp: ORCID iD orcid.org/0000-0003-4470-0589

Catalogue record

Date deposited: 28 Jun 2006
Last modified: 17 Jul 2017 15:36

Export record

Altmetrics

Contributors

Author: P.S. Kemp ORCID iD
Author: D.J. Gilvear
Author: J.D. Armstrong

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×