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

Autor: Torben L. Lauridsen, Thomas Mehner, Ignasi Arranz, Ian J. Winfield, Erik Jeppesen, Christine Argillier, Pietro Volta, Kerstin Holmgren, Sandra Brucet, Lluís Benejam
Přispěvatelé: UNIVERSITY OF VIC-UCC ESP, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), LEIBNIZ INSTITUTE OF FRESHWATER ECOLOGY AND INLAND FISHERIES BERLIN DEU, Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Institute of Freshwater Research, Department of Aquatic Resources, Swedish University of Agricultural Sciences (SLU)-Swedish University of Agricultural Sciences (SLU), DEPARTMENT OF BIOSCIENCE AARHUS UNIVERSITY AARHUS DNK, INSTITUTE OF ECOSYSTEM STUDY VERBANIA PALLANZA ITA, LAKE ECOSYSTEMS GROUP CENTRE FOR ECOLOGY AND HYDROLOGY LANCASTER GBR
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Canadian journal of fisheries and aquatic sciences
72 (2015): 1–16. doi:10.1139/cjfas-2014-0508
info:cnr-pdr/source/autori:Arranz I., Mehner T., Benejam L., Argillier C., Holmgren K., Jeppesen E., Lauridsen T. L., Volta P., Winfield I. J., Brucet S./titolo:Density-dependent effects as key drivers of intraspecific size structure of six abundant fish species in lakes across Europe/doi:10.1139%2Fcjfas-2014-0508/rivista:Canadian journal of fisheries and aquatic sciences (Print)/anno:2015/pagina_da:1/pagina_a:16/intervallo_pagine:1–16/volume:72
Arranz, I, Mehner, T, Benejam, L, Argillier, C, Holmgren, K, Jeppesen, E, Lauridsen, T L, Volta, P, Winfield, I J & Brucet Balmana, S 2016, ' Density-dependent effects as key drivers of intraspecific size structure of six abundant fish species in lakes across Europe ', Canadian Journal of Fisheries and Aquatic Sciences, vol. 73, no. 4, pp. 519–534 . https://doi.org/10.1139/cjfas-2014-0508
Canadian Journal of Fisheries and Aquatic Sciences
Canadian Journal of Fisheries and Aquatic Sciences, NRC Research Press, 2016, 73 (4), pp.519-534. ⟨10.1139/cjfas-2014-0508⟩
ISSN: 0706-652X
1205-7533
DOI: 10.1139/cjfas-2014-0508
Popis: 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 analyzed 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.
Databáze: OpenAIRE
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