FN Archimer Export Format
PT C
TI Do population and community metrics tell the same story about recent changes in Northern Mediterranean fish communities?
BT 
AF ROCHET, Marie-Joelle
   TRENKEL, Verena
   GIL DE SOLA, Luis
   POLITOU, Chrissi-Yianna
   TSERPES, George
   BERTRAND, Jacques
AS 1:1;2:1;3:2;4:3;5:3;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Ifremer, Département Ecologie et Modèles pour l'Halieutique, Ifremer, B.P. 21105. 44311 Nantes CEDEX 03, France
   Instituto Español de Oceanografía, Muelle Pesquero s/n, 29640 Fuengirola, España
   Hellenic Centre for Marine Research, Institute of Marine Biological Resources, Agios Kosmas, 16777 Helliniko, Greece
C2 IFREMER, FRANCE
   IEO, ESPAÑA
   HELLEN CTR MARINE RES, GREECE
SI NANTES
UR https://archimer.ifremer.fr/doc/00133/24377/22389.pdf
LA English
DT Proceedings paper
CR MEDITS / FR
   MEDITS 2004
   MEDITS 2005
   MEDITS 2006
   MEDITS 2007
   MEDITS FR
   MEDITS FR
   MEDITS-FR2000
   MEDITS-FR2001
   MEDITS-FR2002
   MEDITS-FR2003
   MEDITS-FR97
   MEDITS-FR98
   MEDITS-FR99
BO L'Europe
DE ;Community metrics;ecosystem approach to fisheries;fish community;length-based metrics;Mediterranean;survey data
AB This document presents a comparative study of human impacts on the length-structure of fish communities across North-Mediterranean ecosystems. We use survey data to examine trends in length-based metrics and their consistency within and among the two levels of organisation populations and communities, and to suggest interpretations of observed trend combinations. We start from a set of population processes potentially affected by human pressures: fishing will induce mortality especially in target species, whereas the hydrological environment and eutrophication potentially affect recruitment and individual growth. How population changes will be reflected at the community level is expected to depend on community evenness. Based on this expectation, a tentative theory for predicting the joint response of a suite of population and community length-based metrics to potential changes in the environment is proposed. The trends in these metrics from survey data are then examined, focusing on the consistency with the above predictions. The potential causes suggested for the observed trends are then checked against independent evidence of environmental and human pressures on these communities. The approach is applied to the MEDITS survey data, which cover a series of neighbouring fish communities undergoing various human pressures, including fishing, coastal pollution and eutrophication, and a possible change in temperature and hydrology over the last decade.
PY 2007
CT ICES CM 2007 / D:16
ID 24377
ER

EF