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An investigation of human vs. technology-induced variation in catchability for a selection of European fishing fleets

Citation

Mahevas, S and Vermard, Y and Hutton, T and Iriondo, A and Jadaud, A and Maravelias, CD and Punzon, A and Sacchi, J and Tidd, A and Tsitsika, E and Marchal, P and Goascoz, N and Mortreux, S and Roos, D, An investigation of human vs. technology-induced variation in catchability for a selection of European fishing fleets, ICES Journal of Marine Science, 68, (10) pp. 2252-2263. ISSN 1054-3139 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 International Council for the Exploration of the Sea

DOI: doi:10.1093/icesjms/fsr150

Abstract

The impact of the fishing effort exerted by a vessel on a population depends on catchability, which depends on population accessibility and fishing power. The work investigated whether the variation in fishing power could be the result of the technical characteristics of a vessel and/or its gear or whether it is a reflection of inter-vessel differences not accounted for by the technical attributes. These inter-vessel differences could be indicative of a skipper/crew experience effect. To improve understanding of the relationships, landings per unit effort (lpue) from logbooks and technical information on vessels and gears (collected during interviews) were used to identify variables that explained variations in fishing power. The analysis was undertaken by applying a combination of generalized additive models and generalized linear models to data from several European fleets. The study highlights the fact that taking into account information that is not routinely collected, e.g. length of headline, weight of otter boards, or type of groundrope, will significantly improve the modelled relationships between lpue and the variables that measure relative fishing power. The magnitude of the skipper/crew experience effect was weaker than the technical effect of the vessel and/or its gear.

Item Details

Item Type:Refereed Article
Keywords:catchability, fishing power, GAM, GLM, skipper skill, technical characteristics
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
Author:Tidd, A (Dr Alexander Tidd)
ID Code:116248
Year Published:2011
Web of Science® Times Cited:13
Deposited By:Centre for Fisheries and Aquaculture
Deposited On:2017-05-04
Last Modified:2017-11-04
Downloads:0

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