Journal Article

Impact of technological creep on fishing effort and fishing mortality, for a selection of European fleets

Paul Marchal, Bo Andersen, B. Caillart, Ole Eigaard, Olivier Guyader, Holger Hovgaard, Ane Iriondo, Fanny Le Fur, Jacques Sacchi and Marina Santurtún

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 64, issue 1, pages 192-209
Published in print January 2007 | ISSN: 1054-3139
Published online November 2006 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1093/icesjms/fsl014
Impact of technological creep on fishing effort and fishing mortality, for a selection of European fleets

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Marchal, P., Andersen, B., Caillart, B., Eigaard, Guyader, O., Hovgaard, H., Iriondo, A., Le Fur, F., Sacchi, J., and Santurtún, M. 2007. Impact of technological creep on fishing effort and fishing mortality, for a selection of European fleets–ICES Journal of Marine Science, 64, 192–209.

Face-to-face interviews were conducted to identify the main changes in gear and vessel technology that may have improved the fishing efficiency of a number of French, Danish, and Basque fleets over the past few decades. Important changes include the gradual appearance of twin trawls (Danish and French trawlers) and trammel-nets (French gillnetters), and the increased polyvalence of Basque bottom trawlers. The results suggest that fishing effort descriptors that are not traditionally measured (gear type, groundrope type, length of net used per day, headline length, crew size, number of winch or net drums) may have a substantial impact on catch rates. Adjusting fishing effort using such descriptors may generally improve the relationship between fishing effort and fishing mortality.

Keywords: catch rate; fishing effort; fishing mortality; generalized linear models; groundrope; technological creep; twin trawls

Journal Article.  8146 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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