Bycatch and release of pelagic megafauna in industrial trawler fisheries off Northwest Africa

J.J. Zeeberg, A.A.H.M. Corten, E. de Graaf

    Research output: Contribution to journalArticleAcademicpeer-review

    91 Citations (Scopus)

    Abstract

    The accidental capture of large animals such as sharks, manta rays, sea turtles, and dolphins in pelagic trawler fisheries remains controversial because it threatens biological diversity in many biogeographical regions, including the subtropical eastern North Atlantic. Bycatch rates observed during more than 1400 trawl sets off Mauritania, Northwest Africa, are shown to have been considerable during the past 4 years, with high animal abundance in Summer when the Northwest African shelf is occupied by subtropical water. We demonstrate the urgency for bycatch reduction and evaluate the use of species-selective gear, a conservation method immediately available and immediately effective in waters fished through international access agreements. A modification tested in commercial trawls during the observer program guides pelagic megafauna deflected by a filter to an escape tunnel along the bottom of the trawl. This ¿excluder¿ reduces bycatch mortality of the most vulnerable megafauna species by at least 40¿100%
    Original languageEnglish
    Pages (from-to)186-195
    JournalFisheries Research
    Volume78
    Issue number2-3
    DOIs
    Publication statusPublished - 2006

    Keywords

    • leatherback turtles
    • atlantic
    • ocean
    • sea

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