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dc.contributor.authorDommasnes, Are
dc.contributor.authorRey, Francisco
dc.contributor.authorRøttingen, Ingolf
dc.date.accessioned2012-09-03T18:17:45Z
dc.date.available2012-09-03T18:17:45Z
dc.date.issued1992
dc.identifier.citationThis report is not to be cited without prior reference to the authorsno_NO
dc.identifier.urihttp://hdl.handle.net/11250/104968
dc.description.abstractSince 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.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1992/H:16
dc.subjectoxygen levelno_NO
dc.subjectoksygennivåno_NO
dc.subjectherringno_NO
dc.subjectsildno_NO
dc.titleReduced oxygen concentrations in herring wintering areasno_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497no_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452no_NO
dc.source.pagenumber10 s.no_NO


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