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Assessment of impacts from human activities on ecosystem components in the Bay of Biscay in the early 1990s ArchiMer
Lorance, Pascal; Bertrand, Jacques; Brind'Amour, Anik; Rochet, Marie-joelle; Trenkel, Verena.
The ecosystem-based approach to fisheries management and, more specifically, the European Marine Strategy Framework Directive require the assessment of the state and dynamics of an ecosystem in order to determine suitable management strategies. This paper takes an analytical approach to assess the state of the Bay of Biscay ecosystem in the early 1990s, chosen as a period of reference because key monitoring data series have been collected since then. To assess the state of the ecosystem, the pressures exerted by six broad categories of human activities were examined. A literature review of the ecosystem components was made and a component tree was tailored according to data availability. Data rich components were subdivided into subcomponents for their...
Tipo: Text Palavras-chave: Reference state; Ecosystem based management; Human pressure; Inventory; Atlantic Ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11164/7520.pdf
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Evaluating the potential impact of fishing on demersal species in the Bay of Biscay using simulations and survey data ArchiMer
Ravard, David; Brind'Amour, Anik; Trenkel, Verena.
Fishing affects fish populations through direct and indirect effects. It can change size structures and/or modify population mean weights. Reference values are thus needed to assess the status of populations in exploited ecosystems. These reference values can either be set by a historical approach, i.e. using information from before the onset of exploitation or overexploitation, or by a simulation approach. Using a model based on life-history parameters, we predicted population mean weights and length structures at equilibrium (in the absence of fishing and for fishing equal to different fishing mortalities) which we compared with contemporary data collected during scientific surveys in the Bay of Biscay. Contemporary mean weights were 88% to 30% smaller...
Tipo: Text Palavras-chave: Indicators; Fishing impacts; Ecosystem based management; Fish community; Reference points; Northeast Atlantic.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00188/29968/28485.pdf
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