Mitigation measures against seabed impact of mobile fishing gears (Contributo in atti di convegno)

Type
Label
  • Mitigation measures against seabed impact of mobile fishing gears (Contributo in atti di convegno) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • He P., Winger P., Fonteyne R., Pol M., MacMullen P., Løkkeborg S., van Marlen B., Moth-Poulsen T., Zachariassen K., Sala A. (1), Thiele W., Hansen U., Grimaldo E., Revill A., Polet H. (2004)
    Mitigation measures against seabed impact of mobile fishing gears
    in ICES-FAO Working Group on Fishing Technology and Fish Behaviour (WGFTFB), Gdynia, Polonia, 20-23 Aprile 2004
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • He P., Winger P., Fonteyne R., Pol M., MacMullen P., Løkkeborg S., van Marlen B., Moth-Poulsen T., Zachariassen K., Sala A. (1), Thiele W., Hansen U., Grimaldo E., Revill A., Polet H. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • ICES CM 2004/B:05, Ref. ACE (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.ices.dk/sites/pub/Publication%20Reports/Expert%20Group%20Report/ftc/2004/WGFTFB04.pdf (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Report of the ICES-FAO Working Group on Fishing Technology and Fish Behaviour (WGFTFB) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 189 (literal)
Note
  • Google Scholar (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) CNR - ISMAR, U.O.S. Ancona (literal)
Titolo
  • Mitigation measures against seabed impact of mobile fishing gears (literal)
Abstract
  • Bottom-tending mobile fishing gears such as otter trawls, beam trawls and shellfish dredges alter the physical structure of the seabed though their impacts on benthic communities and ecosystems vary with sensitivity and natural disturbance of the seabed, among other factors. While more research is needed to quantify various impacts of different fishing gears used in different fisheries under different fishing ground conditions, technical measures to reduce seabed impacts are encouraged. This report summarizes such measures and ongoing research projects with potential for reducing physical impacts on the seabed as well as negative effect on benthic communities. In general, measures that improve fishing efficiency can reduce fishing time and seabed impacts in strictly-enforced output-controlled fisheries. Also, alternative gears with less seabed contacts may be used instead of traditional bottom-tending gears in some fisheries. Gear modifications which have less seabed effects include measures to reduce seabed contacting area/points of trawl footgears, use of semi-pelagic trawls for shrimps, provision of dropout aft-belly openings in beam trawls, adoption of \"sweepless\" trawls for whiting, and \"wheeled\" footgears replacing rockhoppers. Electrical stimuli may be employed in beam trawls to replace traditional heavy tickler chains for some species, and use of electric pulses in scallop dredges has also shown promise. Some novel gears which have potential for reducing seabed impacts include the \"Active Trawl\" system, the \"Auto-trawl\" system, and the use of kites and depressors in trawls, though some of these gears are in early stages of development. It should be noted that some technical measures described in the report may have other negative or positive outcomes in additional to potential reduction of seabed impacts. Caution should therefore be taken in recommending or implementing their use in specific fisheries. (literal)
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