The University of Southampton
University of Southampton Institutional Repository

Stable isotopes reveal age-dependent trophic level and spatial segregation during adult marine feeding in populations of salmon

MacKenzie, Kirsteen M., Trueman, Clive N., Palmer, Martin R., Moore, Andy, Ibbotson, Anton T., Beaumont, William R.C. and Davidson, Ian C. (2012) Stable isotopes reveal age-dependent trophic level and spatial segregation during adult marine feeding in populations of salmon ICES Journal of Marine Science, 69, (9), pp. 1637-1645. (doi:10.1093/icesjms/fss074).

Record type: Article


Locating and differentiating the marine feeding areas used by adult salmon (Salmo salar) is essential to stock-based management and conservation, but traditional tagging studies are limited and influenced by the uneven distribution of the fisheries or research vessel surveys. Here, a novel approach is used, based on the observation that the isotopic composition of animal tissues is intrinsically linked to the environmental conditions during tissue growth, which allows for the distinction of pelagic fish feeding in different locations. This isotopic approach is applied using archived collections of salmon scales and shows that (i) salmon act as size-structured pelagic predators, (ii) adult salmon from different natal origins within the UK (and hence components of the southern European stock complex) feed in different oceanic regions before their return, (iii) one-sea-winter (1SW) and multi-sea-winter salmon returning to some rivers in the UK are separated in their marine feeding areas, whereas those from others are not, and (iv) salmon from the rivers sampled are not feeding in regions of the Northwest Atlantic used by 1SW salmon returning to rivers in Newfoundland. Therefore, the stable isotope approach allows for retrospective investigations of marine diet, location, and migration at stock- and cohort-specific levels.

Full text not available from this repository.

More information

e-pub ahead of print date: 2012
Published date: 2012
Keywords: microchemistry, migration, North Atlantic, Salmo salar, scales
Organisations: Geochemistry


Local EPrints ID: 340712
ISSN: 1054-3139
PURE UUID: da1298ad-6fe2-45db-94b4-5b45a46f6db2

Catalogue record

Date deposited: 29 Jun 2012 15:13
Last modified: 18 Jul 2017 05:42

Export record



Author: Kirsteen M. MacKenzie
Author: Andy Moore
Author: Anton T. Ibbotson
Author: William R.C. Beaumont
Author: Ian C. Davidson

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 supports OAI 2.0 with a base URL of

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.