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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on April 8, 2009
ICES Journal of Marine Science: Journal du Conseil 2009 66(5):916-927; doi:10.1093/icesjms/fsp084
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© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

A bottom-up approach to technological development and its management implications in a commercial fishery

Ole Ritzau Eigaard

Technical University of Denmark, National Institute for Aquatic Resources, Charlottenlund Castle, 2920 Charlottenlund, Denmark

tel: +45 33 96 33 00; fax: +45 33 96 33 33; e-mail: ore{at}aqua.dtu.dk.

Eigaard, O. R. 2009. A bottom-up approach to technological development and its management implications in a commercial fishery. – ICES Journal of Marine Science, 66: 916–927.

Analyses of electronic equipment on board Danish trawlers and gillnetters show that newer, larger vessels have a significantly higher "technological level" than older, smaller vessels. A hypothesis of linkage between fish-finding and navigation technology on board and standard vessel characteristics was tested based on the definition of a technological index. Using a proportional odds model, vessel length accounted for most of the variation in technological level on board, with odds of 1.17 (95% confidence interval: 1.16–1.18) of a higher index value for each increase in vessel length of 1 m. Vessel age was also significantly correlated with index values. In considering the technological index as an indicator of fishing power, the results have important implications for capacity-reduction schemes intended to reduce harvest pressure on fish stocks. In the course of such structural management plans, older, smaller vessels of a fleet are often replaced with newer, larger vessels within a fixed or reduced nominal capacity limit (e.g. total fleet tonnage), but according to the findings presented, nominal capacity reduction in fleet level may be undermined by increases in individual vessel fishing power.

Keywords: capacity, fish-finding, fishing power, navigation, technological development

Received 6 June 2008; accepted 6 March 2009; advance access publication 8 April 2009.


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