platvisvisser: impact en uitdagingen

Maarten Soetaert

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    Flatfish fishery : impact & challenges
    Soetaert Maarten1,2, Hans Polet2, Annemie Decostere3, Marieke Desender2,3, Koen Chiers1
    1 Department of Pathology, Bacteriology & Poultry Diseases, Faculty of Veterinary Medicine – Ghent University, Salisburylaan 133 Merelbeke, Belgium
    2 Institute for Agricultural and Fisheries Research (ILVO), Animal Sciences - Fisheries, Ankerstraat 1, 8400 Oostende, Belgium
    3 Department of Morphology, Faculty of Veterinary Medicine – Ghent University, Salisburylaan 133, Merelbeke, Belgium
    E-mail: maarten.soetaert@ugent.be


    Sole (Solea solea) and plaice (Pleuronectes platessa) are by far the most targeted marine organisms by the Belgian fishermen. Both demersal fish species are mainly caught using beam trawls with tickler chains. However, this fishing technique has several disadvantages including seabed disturbance, excessive discards and high fuel consumption. Alternative passive techniques such as fly shooting, gill nets or long lines encounter much less this problems, but they are hardly economically feasible or too dependent on the weather conditions to be fully effective. Adequate long-term solutions hence are indispensable to ensure a sustainable and profitable future for the flatfish fishery.
    The most promising alternative meeting both the fisherman’s aspirations and the need for ecological progress is pulse fishing. This technique replaces the tickler chains by electrodes towing over the sea floor and inducing electrical pulses, which elicit an upward movement of the fish enabling its catch without spading the bottom. Pulse fishing, using high frequency and voltage pulses, is currently evaluated for catching sole. Hitherto, several plus points are discernible in comparison to the classical trawl fishery: marked decrease in seabed disturbance, reduction of bycatch and halved fuel consumption. Unfortunately, also negative effects such as dislocated spinal cords, hemorrhages and mortality were observed in certain exposed fish species, especially cod. These adverse effects need to be tackled in order to be able to define pulse fishing as an environmental friendly fishing technique. Further studies hence are needed to define and optimize pulse characteristics for stimulating flatfish that are not harmful for exposed marine organisms.
    TaalEngels
    Aantal pagina's1
    StatusGepubliceerd - 9-okt-2012
    EvenementMédecine Vétérinaire - 2nd edition : Scientific Day 2012 - luik, België
    Duur: 19-okt-201219-okt-2012

    Congres

    CongresMédecine Vétérinaire - 2nd edition : Scientific Day 2012
    LandBelgië
    Stadluik
    Periode19/10/1219/10/12

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