The effect of small-scale resource origin on trophic position estimates in Perca fluviatilis
2006 (English)In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 69, no 1, 141-150 p.Article in journal (Refereed) Published
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 delta C-13 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.
Place, publisher, year, edition, pages
2006. Vol. 69, no 1, 141-150 p.
ontogenetic niche shift, Perca fluviatilis, resource origin, stable isotopes, trophic position
IdentifiersURN: urn:nbn:se:uu:diva-155677DOI: 10.1111/j.1095-8649.2006.01072.xISI: 000239600900010OAI: oai:DiVA.org:uu-155677DiVA: diva2:427617