Skip to main content

The effect of small-scale resource origin on trophic position estimates in Perca fluviatilis

Buy Article:

$51.00 plus tax (Refund Policy)


The influence of small-scale differences in resource origin on trophic position estimates was evaluated with the stable isotopes method. Perch Perca fluviatilis, a widespread freshwater predator, was used as a model organism. High individual variability was found in the contribution of benthic resources to the isotopic signatures of perch caught in the littoral zone, suggesting substantial within-habitat individual specialization. Small-scale resource origin and 13C enrichment should be accounted for to avoid misleading estimates of both the absolute values and the ontogenetic trajectories of trophic position. A conceptual framework using end-member pathways is proposed to estimate trophic position with the stable isotope technique, particularly when marked ontogenetic niche shifts are expected.

Keywords: Perca fluviatilis; ontogenetic niche shift; resource origin; stable isotopes; trophic position

Document Type: Regular Paper


Affiliations: Department of Ecology and Evolution (Limnology), Evolutionary Biology Centre, Uppsala University, Norbyv. 20, 752 36 Uppsala, Sweden

Publication date: July 1, 2006


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more