Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972
In June—July 1972 R. V. «G. O. Sars» carried out a survey in the northern North Sea, Skagerrak and the adjacent waters of the Norwegian Sea. The general features of the hydrography was determined, the relative abundance of fish estimated by means of echo integrator readings and the fish species iden...
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Havforskningsinstituttet
1974
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ftimr:oai:imr.brage.unit.no:11250/113051 2023-05-15T16:11:17+02:00 Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 Investigations on hydrography, plankton and fish distribution in the North Sea and the Norwegian Sea in June-July 1972 Iversen, Svein A. Jakupsstovu, Stein Hjalti Lahn-Johannessen, John Danielssen, Didrik S. 1974 861699 bytes application/pdf http://hdl.handle.net/11250/113051 nob nob Havforskningsinstituttet Fisken og havet urn:issn:0071-5638 http://hdl.handle.net/11250/113051 s.32-45 Research report 1974 ftimr 2021-09-23T20:15:43Z In June—July 1972 R. V. «G. O. Sars» carried out a survey in the northern North Sea, Skagerrak and the adjacent waters of the Norwegian Sea. The general features of the hydrography was determined, the relative abundance of fish estimated by means of echo integrator readings and the fish species identified by bottom trawl and mid water trawl samples. The disribution and relative abundance of plankton, fish eggs and larvae was investigated in the northern North Sea and Skagerrak. The North Sea and Skagerrak area may be divided into three subareas reflecting significant differences in the hydrographic conditions, viz. the Norwegian Deeps (A), the Danish coast (B) and the northern North Sea plateau (C). Plankton concentrations were highest in two separated eddies of surface water located to the west of the Norwegian Deeps and characterized by relatively low temperatures. The distribution of the dominating fish species was found to be fairly closely related to particular water masses. Blue whiting and also greater silver smelt were abundent in the deeper parts of the Norwegian Deeps. Dense concentrations of adult Norway pout as well as the 0-group were found in the slow moving cooled water masses in the central part of the northern North Sea. In the Norwegian Sea the distribution of blue whiting was restricted to the thermocline between O'^ and 2^C. The densest concentrations were observed along the continental slope from the Faroes towards eastern Iceland. Report Faroes Iceland Norskehav* Norwegian Sea Institute for Marine Research: Brage IMR Nordsjøen ENVELOPE(11.435,11.435,64.710,64.710) Norway Norwegian Sea |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
Norwegian Bokmål |
description |
In June—July 1972 R. V. «G. O. Sars» carried out a survey in the northern North Sea, Skagerrak and the adjacent waters of the Norwegian Sea. The general features of the hydrography was determined, the relative abundance of fish estimated by means of echo integrator readings and the fish species identified by bottom trawl and mid water trawl samples. The disribution and relative abundance of plankton, fish eggs and larvae was investigated in the northern North Sea and Skagerrak. The North Sea and Skagerrak area may be divided into three subareas reflecting significant differences in the hydrographic conditions, viz. the Norwegian Deeps (A), the Danish coast (B) and the northern North Sea plateau (C). Plankton concentrations were highest in two separated eddies of surface water located to the west of the Norwegian Deeps and characterized by relatively low temperatures. The distribution of the dominating fish species was found to be fairly closely related to particular water masses. Blue whiting and also greater silver smelt were abundent in the deeper parts of the Norwegian Deeps. Dense concentrations of adult Norway pout as well as the 0-group were found in the slow moving cooled water masses in the central part of the northern North Sea. In the Norwegian Sea the distribution of blue whiting was restricted to the thermocline between O'^ and 2^C. The densest concentrations were observed along the continental slope from the Faroes towards eastern Iceland. |
format |
Report |
author |
Iversen, Svein A. Jakupsstovu, Stein Hjalti Lahn-Johannessen, John Danielssen, Didrik S. |
spellingShingle |
Iversen, Svein A. Jakupsstovu, Stein Hjalti Lahn-Johannessen, John Danielssen, Didrik S. Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 |
author_facet |
Iversen, Svein A. Jakupsstovu, Stein Hjalti Lahn-Johannessen, John Danielssen, Didrik S. |
author_sort |
Iversen, Svein A. |
title |
Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 |
title_short |
Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 |
title_full |
Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 |
title_fullStr |
Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 |
title_full_unstemmed |
Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972 |
title_sort |
hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i nordsjøen og norskehavet i juni - juli 1972 |
publisher |
Havforskningsinstituttet |
publishDate |
1974 |
url |
http://hdl.handle.net/11250/113051 |
long_lat |
ENVELOPE(11.435,11.435,64.710,64.710) |
geographic |
Nordsjøen Norway Norwegian Sea |
geographic_facet |
Nordsjøen Norway Norwegian Sea |
genre |
Faroes Iceland Norskehav* Norwegian Sea |
genre_facet |
Faroes Iceland Norskehav* Norwegian Sea |
op_source |
s.32-45 |
op_relation |
Fisken og havet urn:issn:0071-5638 http://hdl.handle.net/11250/113051 |
_version_ |
1765996416529858560 |