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.
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| Trefwoorden |
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, France [Marine Regions]; ANE, Kanaal [Marine Regions]; ANE, Nederland [Marine Regions]; ANE, North East Atlantic [Marine Regions]; ANE, United Kingdom [Marine Regions]
Marien/Kust |
| 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 |
| Auteurs | | Top |
- Morizur, Y.
- Tregenza, N.
- Heessen, H.
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| 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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