• shareshare
  • link
  • cite
  • add
auto_awesome_motion View all 3 versions
Publication . Other literature type . Article . 2018

Distribution of overwintering Calanus in the North Norwegian Sea.

Edvardsen, A.; Pedersen, J. M.; Slagstad, D.; Semenova, T.; Timonin, A.;
Open Access
Published: 15 Jan 2018
Publisher: European Geosciences Union
Country: Norway

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.


VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497, VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452, VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Systematisk zoologi: 487, VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Hydrologi: 454, VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoogeografi: 486

28 references, page 1 of 3

Backhaus, J. O., Harms, I. H., Krause, M., and Heath, M. R.: An hypothesis concerning the space-time succession of Calanus finmarchicus in the northern North Sea, ICES J. Mar. Sci., 51, 169- 180, 1994.

Bryant, A. D., Hainbucher, D., and Heath, M.: Basin-scale advection and population persistence of Calanus finmarchicus, Fisheries Oceanogr., 7, 235-244, 1998.

Campbell, R. W. and Dower, J. F.: Role of lipids in the maintenance of neutral buoyancy by zooplankton, Mar. Ecology-Progress Series, 263, 93-99, 2003.

Gislason, A.: Life-cycle strategies and seasonal migrations of oceanic copepods in the Irminger Sea, Hydrobiologia, 503, 195- 209, 2003. [OpenAIRE]

Gislason, A. and Astthorsson, O. S.: Winter distribution, ontogenetic migration, and rates of egg production of Calanus finmarchicus southwest of Iceland, ICES J. Mar. Sci., 57, 1727- 1739, 2000. [OpenAIRE]

Halvorsen, E., Tande, K. S., Edvardsen, A., Slagstad, D., and Pedersen, O. P.: Habitat selection of overwintering Calanus finmarchicus in the NE Norwegian Sea and shelf waters off Northern Norway in 2000-02, Fisheries Oceanogr., 12, 339-351, 2003.

Heath, M.: The ascent migration of Calanus finmarchicus from the overwintering depths in the Faroe-Shetland Channel, Fisheries Oceanogr., 8, 84-99, 1999.

Heath, M., Backhaus, J., Richardson, K., McKenzie, E., Slagstad, D., Beare, D., Dunn, J., Fraser, J., Gallego, A., Hainbucher, D., Hay, S., Jo´nasdo´ttir, S., Madden, H., Mardaljevic, J., and Schacht, A.: Climate fluctuations and the spring invasion of the North Sea by Calanus finmarchicus, Fisheries Oceanogr., 8, 163- 176, 1999.

Heath, M. R., Fraser, J. G., Gislason, A., Hay, S. J., Jo´nasdo´ttir, S. H., and Richardson, K.: Winter distribution of Calanus finmarchicus in the Northeast Atlantic, ICES J. Mar. Sci., 57, 1628- 1635, 2000.

Heath, M. R., Boyle, P. R., Gislason, A., Gurney, W. S. C., Hay, S. J., Head, E. J. H., Holmes, S., Ingvarsdo´ttir, A., Jo´nasdo´ttir, S. H., Lindeque, P., Pollard, R. T., Rasmussen, J., Richards, K., Richardson, K., Smerdon, G., and Speirs, D.: Comparative ecology of over-wintering Calanus finmarchicus in the northern North Atlantic, and implications for life-cycle patterns, ICES J. Mar. Sci., 61, 698-708, 2004. [OpenAIRE]

Download fromView all 2 sources
Ocean Science (OS)
Other literature type . 2018