Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic
The marine mammals catch rate of pelagic trawling in the North-east Atlantic has not previously been assessed by direct observation. A study was funded by the European Commission to collect information on the catches of fish and mammals by several pelagic trawl fisheries from England, France, Irelan...
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ftarchimer:oai:archimer.ifremer.fr:2340 2023-05-15T17:38:20+02:00 Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic Morizur, Yvon Tregenza, Nick Heessen, Henck Berrow, Simon 1997-10-03 application/pdf https://archimer.ifremer.fr/doc/1997/acte-2340.pdf https://archimer.ifremer.fr/doc/00000/2340/ eng eng CM. 1997 / Q : 05 https://archimer.ifremer.fr/doc/1997/acte-2340.pdf https://archimer.ifremer.fr/doc/00000/2340/ info:eu-repo/semantics/openAccess restricted use Netherlands France Eire ANE Atlantic Stenella Dicentrarchus labrax Merluccius Thunnus Trachurus trachurus Phoca vitulina Clupea harengus Fish catch statistics Midwater trawls text Conference article info:eu-repo/semantics/conferenceObject 1997 ftarchimer 2021-09-23T20:14:37Z The marine mammals catch rate of pelagic trawling in the North-east Atlantic has not previously been assessed by direct observation. A study was funded by the European Commission to collect information on the catches of fish and mammals by several pelagic trawl fisheries from England, France, Ireland and Netherlands. This paper presents a summary of the results, as far as the by catch of marine mammals is concerned, between 1994-1995. It was not possible to carry out observations of all the pelagic trawl fisheries but a total of eleven fisheries were investigated in this study. In one fishery (Irish herring (Thunnus) trawling), four grey seals (Phoca vitulina) were caught in separate trawls during slightly more than 100 hours trawling. Cetaceans (dolphins) were incidentally caught in four pelagic fisheries (Dutch horsemackerel, (Trachurus trachurus) French tuna, (Thunnus) French hake, (Merluccius) French sea bass trawling Dicentrachus labrax). Eleven different trawls caught a total of eighteen dolphins (Stenella). These catches were observed during 1300 hours of deployment of the trawls. Visual inspection of pelagic trawl emptied using fish pumps was thought to be unreliable for the detection of cetacean bycatch. The extent of observation and number of observed bycatches is however too small to make a reliable assessment of overall by catch rates. In those fisheries where cetacean bycatch occurred rates were between 1.1 and 1.5 cetaceans per 100 hours of trawling. Conference Object North East Atlantic Phoca vitulina Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Hake ENVELOPE(15.612,15.612,66.797,66.797) |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Netherlands France Eire ANE Atlantic Stenella Dicentrarchus labrax Merluccius Thunnus Trachurus trachurus Phoca vitulina Clupea harengus Fish catch statistics Midwater trawls |
spellingShingle |
Netherlands France Eire ANE Atlantic Stenella Dicentrarchus labrax Merluccius Thunnus Trachurus trachurus Phoca vitulina Clupea harengus Fish catch statistics Midwater trawls Morizur, Yvon Tregenza, Nick Heessen, Henck Berrow, Simon Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic |
topic_facet |
Netherlands France Eire ANE Atlantic Stenella Dicentrarchus labrax Merluccius Thunnus Trachurus trachurus Phoca vitulina Clupea harengus Fish catch statistics Midwater trawls |
description |
The marine mammals catch rate of pelagic trawling in the North-east Atlantic has not previously been assessed by direct observation. A study was funded by the European Commission to collect information on the catches of fish and mammals by several pelagic trawl fisheries from England, France, Ireland and Netherlands. This paper presents a summary of the results, as far as the by catch of marine mammals is concerned, between 1994-1995. It was not possible to carry out observations of all the pelagic trawl fisheries but a total of eleven fisheries were investigated in this study. In one fishery (Irish herring (Thunnus) trawling), four grey seals (Phoca vitulina) were caught in separate trawls during slightly more than 100 hours trawling. Cetaceans (dolphins) were incidentally caught in four pelagic fisheries (Dutch horsemackerel, (Trachurus trachurus) French tuna, (Thunnus) French hake, (Merluccius) French sea bass trawling Dicentrachus labrax). Eleven different trawls caught a total of eighteen dolphins (Stenella). These catches were observed during 1300 hours of deployment of the trawls. Visual inspection of pelagic trawl emptied using fish pumps was thought to be unreliable for the detection of cetacean bycatch. The extent of observation and number of observed bycatches is however too small to make a reliable assessment of overall by catch rates. In those fisheries where cetacean bycatch occurred rates were between 1.1 and 1.5 cetaceans per 100 hours of trawling. |
format |
Conference Object |
author |
Morizur, Yvon Tregenza, Nick Heessen, Henck Berrow, Simon |
author_facet |
Morizur, Yvon Tregenza, Nick Heessen, Henck Berrow, Simon |
author_sort |
Morizur, Yvon |
title |
Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic |
title_short |
Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic |
title_full |
Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic |
title_fullStr |
Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic |
title_full_unstemmed |
Incidental mammal catches in pelagic trawl fisheries of the North East Atlantic |
title_sort |
incidental mammal catches in pelagic trawl fisheries of the north east atlantic |
publisher |
CM. 1997 / Q : 05 |
publishDate |
1997 |
url |
https://archimer.ifremer.fr/doc/1997/acte-2340.pdf https://archimer.ifremer.fr/doc/00000/2340/ |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Hake |
geographic_facet |
Hake |
genre |
North East Atlantic Phoca vitulina |
genre_facet |
North East Atlantic Phoca vitulina |
op_relation |
https://archimer.ifremer.fr/doc/1997/acte-2340.pdf https://archimer.ifremer.fr/doc/00000/2340/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
_version_ |
1766138726675644416 |