The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea
The year class strength of Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea is extremely variable. One of the key indicators for a possible strong year class is water temperature since good year classes may be produced in warm years while they seldom if ever occur in cold years. Water temper...
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ftimr:oai:imr.brage.unit.no:11250/105765 2023-05-15T15:38:19+02:00 The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea Helle, Kristin Pennington, Michael 1997 application/pdf http://hdl.handle.net/11250/105765 eng eng ICES ICES CM Documents;1997/T:32 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105765 16 s. cod torsk juveniles yngel zooplankton dyreplankton biomass biomasse distribution utbredelse VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Working paper 1997 ftimr 2021-09-23T20:14:15Z The year class strength of Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea is extremely variable. One of the key indicators for a possible strong year class is water temperature since good year classes may be produced in warm years while they seldom if ever occur in cold years. Water temperature alone is not sufficient to produce a good year class. Thus it is conjectured that when there is a strong flow of Atlantic water from the Norwegian Sea into the Barents Sea it not only warms the water but transports large quantities of zooplankton and hence provides better survival conditions for cod. Survey data from the Barents Sea for the years 1977 through 1984 are examined to determine the relation between zooplankton abundance and the spatial distribution of juvenile cod and to investigate if zooplankton abundance is associated with the flow of Atlantic water. For all years, more zooplankton on average were found in areas with cod than in those without cod. Total zooplankton abundance increased significantly in the Barents Sea concurrently with an increased inflow of Atlantic waters in 1981. Report Barents Sea Gadus morhua Norwegian Sea Institute for Marine Research: Brage IMR Barents Sea Norwegian Sea |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
cod torsk juveniles yngel zooplankton dyreplankton biomass biomasse distribution utbredelse VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
spellingShingle |
cod torsk juveniles yngel zooplankton dyreplankton biomass biomasse distribution utbredelse VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Helle, Kristin Pennington, Michael The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea |
topic_facet |
cod torsk juveniles yngel zooplankton dyreplankton biomass biomasse distribution utbredelse VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
description |
The year class strength of Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea is extremely variable. One of the key indicators for a possible strong year class is water temperature since good year classes may be produced in warm years while they seldom if ever occur in cold years. Water temperature alone is not sufficient to produce a good year class. Thus it is conjectured that when there is a strong flow of Atlantic water from the Norwegian Sea into the Barents Sea it not only warms the water but transports large quantities of zooplankton and hence provides better survival conditions for cod. Survey data from the Barents Sea for the years 1977 through 1984 are examined to determine the relation between zooplankton abundance and the spatial distribution of juvenile cod and to investigate if zooplankton abundance is associated with the flow of Atlantic water. For all years, more zooplankton on average were found in areas with cod than in those without cod. Total zooplankton abundance increased significantly in the Barents Sea concurrently with an increased inflow of Atlantic waters in 1981. |
format |
Report |
author |
Helle, Kristin Pennington, Michael |
author_facet |
Helle, Kristin Pennington, Michael |
author_sort |
Helle, Kristin |
title |
The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea |
title_short |
The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea |
title_full |
The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea |
title_fullStr |
The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea |
title_full_unstemmed |
The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea |
title_sort |
relation between the spatial distribution of early juvenile cod (gadus morhua l.) and zooplankton biomass in the barents sea |
publisher |
ICES |
publishDate |
1997 |
url |
http://hdl.handle.net/11250/105765 |
geographic |
Barents Sea Norwegian Sea |
geographic_facet |
Barents Sea Norwegian Sea |
genre |
Barents Sea Gadus morhua Norwegian Sea |
genre_facet |
Barents Sea Gadus morhua Norwegian Sea |
op_source |
16 s. |
op_relation |
ICES CM Documents;1997/T:32 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105765 |
_version_ |
1766369159013203968 |