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By-catch and Discarding in Pelagic Trawl Fisheries: Final report
Morizur, Y.; Tregenza, N.; Heessen, H.; Berrow, S.; Pouvreau, S. (1996). By-catch and Discarding in Pelagic Trawl Fisheries: Final report. IFREMER: [s.l.]. 213 pp.
Available in  Authors 
    Vlaams Instituut voor de Zee: Open access 251012 [ download pdf ]
Keywords
    Aquatic organisms > Marine organisms > Aquatic mammals > Marine mammals
    Bycatches
    Characteristics > Values
    Fisheries > Marine fisheries > Pelagic fisheries
    Fishing vessels > Trawlers
    Forestry > Forestry practices > Logging > Landings
    ANE, English Channel [Marine Regions]; ANE, France [Marine Regions]; ANE, Netherlands [Marine Regions]; ANE, North East Atlantic [Marine Regions]; ANE, United Kingdom [Marine Regions]
    Marine/Coastal
Author keywords
    Albacore, Bluefin tuna, Bass, Black bream, Whiting, Hake, Anchovy, Pilchard, Mackerel, Horsemackerel, Seal, Cetacean, Incidental mammal catch, Reasons for discarding, Discards, By catch, Pelagic trawl
Authors  Top 
  • Morizur, Y.
  • Tregenza, N.
  • Heessen, H.
  • Berrow, S.
  • Pouvreau, S.
Abstract
    Unintentional catches of dolphins were recorded in four of the investigated fisheries (Dutch horsemackerel, French tuna, French hake and French sea bass) at a rate of 1 dolphin per 100 tow hours; Grey seals were caught in the Irish herring fishery at a rate of 4 individuals per 100 tow hours. The fish catches showed a high selectivity in several pelagic fisheries with a low discard rate (< 20 % by weight of the total catch) and a high percentage of the target species (> 50 % by weight) in the catch. However in some fisheries poor selectivity was observed particularly in the French hake fishery (with discards equal to 50 % of the total catch) and in the French black bream fisheries where legal targeted individuals amounted less than 30 % by weight in the total catch. This might be improved by appropriate technical measures such a minimum mesh size appriopriate according to the target species.
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