Journal Article

Influence of environmental factors on commercial trawl catches of <i>Nephrops norvegicus</i> (L.)

Francesc Maynou and Francesc Sardà

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 58, issue 6, pages 1318-1325
Published in print January 2001 | ISSN: 1054-3139
Published online January 2001 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1006/jmsc.2001.1091
Influence of environmental factors on commercial trawl catches of Nephrops norvegicus (L.)

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Environmental factors that affect small-scale spatio-temporal variability in commercial catch rates of Nephrops norvegicus are analysed. Catch and effort data were obtained from a selection of fishers that operated in the Nephrops fishery on a daily basis, and the environmental factors studied were those considered by the fishers themselves to be the ones driving variability in the fishery. Using multivariate regression analysis and MANOVA, depth, atmospheric pressure, cloud cover, and sea state were found to affect the catch rate of the Nephrops deep-water fishery in the northwestern Mediterranean. The results are consistent with the hypothesis already in the scientific literature that the light intensity reaching the seabed has a primary influence on the activity rates of Nephrops and hence the species' vulnerability to trawling. The value of collaborating with fishers in establishing scientific hypotheses and obtaining data, and specifically drawing on their knowledge of the ecosystem in which they operate, is shown by this study, a case study in integrating Traditional Ecological Knowledge (TEK) into fisheries management.

Keywords: catchability; commercial trawlers; environmental factors; Mediterranean Sea; Nephrops norvegicus; Traditional Ecological Knowledge

Journal Article.  0 words. 

Subjects: Environmental Science ; Marine and Estuarine Biology

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