Reduced oxygen concentrations in herring wintering areas
Since 1987 the major part of the adult Norwegian spring spawning herring stock has been wintering in the Ofotfjord and the Tysfjord, two tributaries to the Vestfjord in northern Norway. The herring enter the fjords in August-September, and leave again in January, to start their spawning migration. T...
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ftimr:oai:imr.brage.unit.no:11250/104968 2023-05-15T17:43:27+02:00 Reduced oxygen concentrations in herring wintering areas Dommasnes, Are Rey, Francisco Røttingen, Ingolf 1992 application/pdf http://hdl.handle.net/11250/104968 eng eng ICES ICES CM Documents;1992/H:16 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/104968 10 s. oxygen level oksygennivå herring sild VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 Working paper 1992 ftimr 2021-09-23T20:14:47Z Since 1987 the major part of the adult Norwegian spring spawning herring stock has been wintering in the Ofotfjord and the Tysfjord, two tributaries to the Vestfjord in northern Norway. The herring enter the fjords in August-September, and leave again in January, to start their spawning migration. The Institute of Marine Research has had regular surveys in the area in November each year since 1975, in which the herring population present has been measured acoustically. Since 1976 environmental parameters have also been recorded, including temperature, salinity, and oxygen and nitrate concentrations. This time series shows a gradual decrease in oxygen concentration in the Ofotfjord since 1987, when the herring started wintering in the fjord. High concentrations of herring are found in areas with oxygen concentrations as low as 1-2 ml1^-1. This paper presents and discusses the available data. Report Northern Norway 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 |
oxygen level oksygennivå herring sild VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 |
spellingShingle |
oxygen level oksygennivå herring sild VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 Dommasnes, Are Rey, Francisco Røttingen, Ingolf Reduced oxygen concentrations in herring wintering areas |
topic_facet |
oxygen level oksygennivå herring sild VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 |
description |
Since 1987 the major part of the adult Norwegian spring spawning herring stock has been wintering in the Ofotfjord and the Tysfjord, two tributaries to the Vestfjord in northern Norway. The herring enter the fjords in August-September, and leave again in January, to start their spawning migration. The Institute of Marine Research has had regular surveys in the area in November each year since 1975, in which the herring population present has been measured acoustically. Since 1976 environmental parameters have also been recorded, including temperature, salinity, and oxygen and nitrate concentrations. This time series shows a gradual decrease in oxygen concentration in the Ofotfjord since 1987, when the herring started wintering in the fjord. High concentrations of herring are found in areas with oxygen concentrations as low as 1-2 ml1^-1. This paper presents and discusses the available data. |
format |
Report |
author |
Dommasnes, Are Rey, Francisco Røttingen, Ingolf |
author_facet |
Dommasnes, Are Rey, Francisco Røttingen, Ingolf |
author_sort |
Dommasnes, Are |
title |
Reduced oxygen concentrations in herring wintering areas |
title_short |
Reduced oxygen concentrations in herring wintering areas |
title_full |
Reduced oxygen concentrations in herring wintering areas |
title_fullStr |
Reduced oxygen concentrations in herring wintering areas |
title_full_unstemmed |
Reduced oxygen concentrations in herring wintering areas |
title_sort |
reduced oxygen concentrations in herring wintering areas |
publisher |
ICES |
publishDate |
1992 |
url |
http://hdl.handle.net/11250/104968 |
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 |
Northern Norway Tysfjord |
genre_facet |
Northern Norway Tysfjord |
op_source |
10 s. |
op_relation |
ICES CM Documents;1992/H:16 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/104968 |
_version_ |
1766145526281011200 |