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Article Dans Une Revue ICES Journal of Marine Science Année : 2005

Combining indicator trends to assess ongoing changes in exploited fish communities: diagnostic of communities off the coasts of France

Mj Rochet
  • Fonction : Auteur
V Trenkel
  • Fonction : Auteur
R Bellail
  • Fonction : Auteur
F Coppin
  • Fonction : Auteur
Olivier Le Pape
Jc Mahe
  • Fonction : Auteur
J Morin
  • Fonction : Auteur
Jc Poulard
  • Fonction : Auteur
I Schlaich
  • Fonction : Auteur
A Souplet
  • Fonction : Auteur
Y Verin
  • Fonction : Auteur

Résumé

We present a method for combining individual indicator results into a comprehensive diagnostic of fishing impacts on fish populations and communities. A conceptual framework for interpreting combined trends in a set of simple indicators is proposed, relying beforehand on qualitative expectations anchored in ecological theory. The initial state of the community is first assessed using published information. Which combinations of trends are acceptable or undesirable is decided, depending on the initial status. The indicators are then calculated from a time-series and their time trends are estimated as the slopes of linear models. Finally, the test results are combined within the predefined framework, providing a diagnostic on the dynamics of fishing impacts on populations and communities. The method is demonstrated for nine coastal and shelf-sea fish communities monitored by French surveys. Most communities were persistently or increasingly impacted by fishing. In addition, climate change seems to have contributed to changes in East Atlantic communities.

Dates et versions

hal-01823090 , version 1 (25-06-2018)

Identifiants

Citer

Mj Rochet, V Trenkel, R Bellail, F Coppin, Olivier Le Pape, et al.. Combining indicator trends to assess ongoing changes in exploited fish communities: diagnostic of communities off the coasts of France. ICES Journal of Marine Science, 2005, 62 (8), pp.1647--1664. ⟨10.1016/j.icesjms.2005.06.009⟩. ⟨hal-01823090⟩
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