Density-dependent effects as key drivers of intraspecific size structure of six abundant fish species in lakes across Europe

Effets de la densité dépendance : driver clé de la structure intraspécifique en taille de six espèces de poissons abondantes dans les lacs d'Europe

Arranz, I. ; Mehner, T. ; Benejam, L. ; Argillier, C. ; Holmgren, K. ; Jeppesen, E. ; Lauridsen, T.L. ; Volta, P. ; Winfield, I.J. ; Brucet, S.

Type de document
Article de revue scientifique à comité de lecture
Langue
Anglais
Affiliation de l'auteur
UNIVERSITY OF VIC-UCC ESP ; LEIBNIZ INSTITUTE OF FRESHWATER ECOLOGY AND INLAND FISHERIES BERLIN DEU ; UNIVERSITY OF VIC-UCC ESP ; IRSTEA AIX EN PROVENCE UR RECOVER FRA ; INSTITUTE OF FRESHWATER RESEARCH SWEDISH UNIVERSITY OF AGRICULTURAL SCIENCES DROTTNINGHOLM SWE ; DEPARTMENT OF BIOSCIENCE AARHUS UNIVERSITY AARHUS DNK ; DEPARTMENT OF BIOSCIENCE AARHUS UNIVERSITY AARHUS DNK ; INSTITUTE OF ECOSYSTEM STUDY VERBANIA PALLANZA ITA ; LAKE ECOSYSTEMS GROUP CENTRE FOR ECOLOGY AND HYDROLOGY LANCASTER GBR ; UNIVERSITY OF VIC-UCC ESP
Année
2016
Résumé / Abstract
We studied fish size structure by using mean size, size diversity, and the slope of linear size spectra of six common European fish species along large-scale environmental gradients. We further analysed the response of these three size metrics to environmental variables and to density-dependent effects, i.e., relative estimates of abundance (catch per unit effort, CPUE). We found differences in the strength of main predictors of size structure between the six species, but the direction of the response was relatively similar and consistent for most of the size metrics. Mean body size was negatively related to temperature for perch (Perca fluviatilis), roach (Rutilus rutilus), and ruffe (Gymnocephalus cernuus). Lake productivity (expressed as total phosphorus concentration) and lake depth were also predictors of size structure for four of six species. Moreover, we found a strong density dependence of size structure for all species, resulting in lower mean body size and size diversity and steeper size spectra slopes when density dependence increases. This suggests that density dependence is a key driver of fish size structure.
Source
Canadian Journal of Fisheries and Aquatic Sciences, vol. 73, num. 4, p. 519 - 534

puce  Accés à la notice sur le site Irstea Publications / Display bibliographic record on Irstea Publications website

  Liste complète des notices de CemOA