Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, Tysfjord, and Ofotfjord, in northem Norway in December 1996. The basic method is that of echo integration, with compensation for acoustic extinction. Physical capture has been effected by means of the...
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Online Access: | http://hdl.handle.net/11250/105723 |
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ftimr:oai:imr.brage.unit.no:11250/105723 2023-05-15T18:41:23+02:00 Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 Ostrowski, Marek Foote, Kenneth G. Røttingen, Ingolf Slotte, Aril 1997 application/pdf http://hdl.handle.net/11250/105723 eng eng ICES ICES CM Documents;1997/FF:13 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105723 24 s. herring sild stock assessment bestandsberegning spawning stock gytebestand sampling prøvetaking VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Working paper 1997 ftimr 2021-09-23T20:15:55Z The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, Tysfjord, and Ofotfjord, in northem Norway in December 1996. The basic method is that of echo integration, with compensation for acoustic extinction. Physical capture has been effected by means of the Multisampler pelagic trawl, which allows remote opening and closing of each of three codends at arbitrary depths. This has shown essentially thorough mixing of the dominant year classes except in the two fjord arms, where the samples contained a larger proportion of older fish (1983 year class). Geostatistics has been employed to describe the spatial structure and to provide an estimate of variance. Data quality control procedures have been performed and are described. Report Tysfjord Institute for Marine Research: Brage IMR Norway Tysfjord ENVELOPE(16.374,16.374,68.097,68.097) Vestfjord ENVELOPE(-28.750,-28.750,70.500,70.500) |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
herring sild stock assessment bestandsberegning spawning stock gytebestand sampling prøvetaking VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
spellingShingle |
herring sild stock assessment bestandsberegning spawning stock gytebestand sampling prøvetaking VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Ostrowski, Marek Foote, Kenneth G. Røttingen, Ingolf Slotte, Aril Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 |
topic_facet |
herring sild stock assessment bestandsberegning spawning stock gytebestand sampling prøvetaking VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
description |
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, Tysfjord, and Ofotfjord, in northem Norway in December 1996. The basic method is that of echo integration, with compensation for acoustic extinction. Physical capture has been effected by means of the Multisampler pelagic trawl, which allows remote opening and closing of each of three codends at arbitrary depths. This has shown essentially thorough mixing of the dominant year classes except in the two fjord arms, where the samples contained a larger proportion of older fish (1983 year class). Geostatistics has been employed to describe the spatial structure and to provide an estimate of variance. Data quality control procedures have been performed and are described. |
format |
Report |
author |
Ostrowski, Marek Foote, Kenneth G. Røttingen, Ingolf Slotte, Aril |
author_facet |
Ostrowski, Marek Foote, Kenneth G. Røttingen, Ingolf Slotte, Aril |
author_sort |
Ostrowski, Marek |
title |
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 |
title_short |
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 |
title_full |
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 |
title_fullStr |
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 |
title_full_unstemmed |
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996 |
title_sort |
abundance estimation of norwegian spring spawning herring wintering in the vestfjord system, december 1996 |
publisher |
ICES |
publishDate |
1997 |
url |
http://hdl.handle.net/11250/105723 |
long_lat |
ENVELOPE(16.374,16.374,68.097,68.097) ENVELOPE(-28.750,-28.750,70.500,70.500) |
geographic |
Norway Tysfjord Vestfjord |
geographic_facet |
Norway Tysfjord Vestfjord |
genre |
Tysfjord |
genre_facet |
Tysfjord |
op_source |
24 s. |
op_relation |
ICES CM Documents;1997/FF:13 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105723 |
_version_ |
1766230874777452544 |