Distribution of overwintering Calanus in the North Norwegian Sea
During winter 2003 and 2004, zooplankton and hydrographic data were collected in the northern parts of the Norwegian Sea (68–72° N, 8–17° E) west of the Norwegian shelf break at depths down to 1800 m. The results cover both inter and intra annual changes of hydrography and distribution of Calanus sp...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2006
|
Subjects: | |
Online Access: | https://doaj.org/article/e1a28dafa1164aa688a51d45b36c864f |
id |
ftdoajarticles:oai:doaj.org/article:e1a28dafa1164aa688a51d45b36c864f |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:e1a28dafa1164aa688a51d45b36c864f 2023-05-15T15:48:02+02:00 Distribution of overwintering Calanus in the North Norwegian Sea A. Edvardsen J. M. Pedersen D. Slagstad T. Semenova A. Timonin 2006-01-01T00:00:00Z https://doaj.org/article/e1a28dafa1164aa688a51d45b36c864f EN eng Copernicus Publications http://www.ocean-sci.net/2/87/2006/os-2-87-2006.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/e1a28dafa1164aa688a51d45b36c864f Ocean Science, Vol 2, Iss 2, Pp 87-96 (2006) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2006 ftdoajarticles 2022-12-31T10:34:00Z During winter 2003 and 2004, zooplankton and hydrographic data were collected in the northern parts of the Norwegian Sea (68–72° N, 8–17° E) west of the Norwegian shelf break at depths down to 1800 m. The results cover both inter and intra annual changes of hydrography and distribution of Calanus spp. For the whole survey area, average seawater temperature down to 1000 m was higher in 2004 than in the same period in 2003. For the upper 500 m the difference was ca. 1°C. Calanus finmarchicus dominated at ca. 75% of the total copepod abundance. Typical abundance of C. finmarchicus in the survey area was 30 000–40 000 m −2 . C. hyperboreus was found deeper than C. finmarchicus while other copepods were found at the depth of C. finmarchicus or shallower. From January to February 2004, the peak of abundance of C. finmarchicus and C. hyperboreus shifted approximately 300 m upwards indicating that ascent from overwintering depth took place at a speed of 10 m d −1 during this period. In general, high abundance of copepods was found adjacent to the shelf slope while oceanic areas had low and intermediate abundance. In the southern part of the survey area, location of high and low copepod abundance shifted both between and within years. In the northern part of the survey area where the shelf slope is less steep, copepods was present at intermediate and high abundance during all surveys. Article in Journal/Newspaper Calanus finmarchicus Norwegian Sea Copepods Directory of Open Access Journals: DOAJ Articles Norwegian Sea |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 A. Edvardsen J. M. Pedersen D. Slagstad T. Semenova A. Timonin Distribution of overwintering Calanus in the North Norwegian Sea |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
During winter 2003 and 2004, zooplankton and hydrographic data were collected in the northern parts of the Norwegian Sea (68–72° N, 8–17° E) west of the Norwegian shelf break at depths down to 1800 m. The results cover both inter and intra annual changes of hydrography and distribution of Calanus spp. For the whole survey area, average seawater temperature down to 1000 m was higher in 2004 than in the same period in 2003. For the upper 500 m the difference was ca. 1°C. Calanus finmarchicus dominated at ca. 75% of the total copepod abundance. Typical abundance of C. finmarchicus in the survey area was 30 000–40 000 m −2 . C. hyperboreus was found deeper than C. finmarchicus while other copepods were found at the depth of C. finmarchicus or shallower. From January to February 2004, the peak of abundance of C. finmarchicus and C. hyperboreus shifted approximately 300 m upwards indicating that ascent from overwintering depth took place at a speed of 10 m d −1 during this period. In general, high abundance of copepods was found adjacent to the shelf slope while oceanic areas had low and intermediate abundance. In the southern part of the survey area, location of high and low copepod abundance shifted both between and within years. In the northern part of the survey area where the shelf slope is less steep, copepods was present at intermediate and high abundance during all surveys. |
format |
Article in Journal/Newspaper |
author |
A. Edvardsen J. M. Pedersen D. Slagstad T. Semenova A. Timonin |
author_facet |
A. Edvardsen J. M. Pedersen D. Slagstad T. Semenova A. Timonin |
author_sort |
A. Edvardsen |
title |
Distribution of overwintering Calanus in the North Norwegian Sea |
title_short |
Distribution of overwintering Calanus in the North Norwegian Sea |
title_full |
Distribution of overwintering Calanus in the North Norwegian Sea |
title_fullStr |
Distribution of overwintering Calanus in the North Norwegian Sea |
title_full_unstemmed |
Distribution of overwintering Calanus in the North Norwegian Sea |
title_sort |
distribution of overwintering calanus in the north norwegian sea |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doaj.org/article/e1a28dafa1164aa688a51d45b36c864f |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Calanus finmarchicus Norwegian Sea Copepods |
genre_facet |
Calanus finmarchicus Norwegian Sea Copepods |
op_source |
Ocean Science, Vol 2, Iss 2, Pp 87-96 (2006) |
op_relation |
http://www.ocean-sci.net/2/87/2006/os-2-87-2006.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/e1a28dafa1164aa688a51d45b36c864f |
_version_ |
1766383030490890240 |