Browsing ICES CM documents authored by IMR scientists (1949-2011) by Author "Skjoldal, Hein Rune"
Now showing items 1-12 of 12
-
Acoustic visualization of large scale macroplankton and micronekton distributions across the Norwegian shelf and slope of the Norwegian Sea.
Melle, Webjørn; Kaartvedt, Stein; Knutsen, Tor; Dalpadado, Padmini; Skjoldal, Hein Rune (ICES CM Documents;1993/L:44, Working paper, 1993)We present results from acoustical (38 kHz split beam) surveys, biological sampling (trawling, zooplankton nets), and measurements of physical parameters (salinity, temperature, currents) across and along the shelf ... -
Feeding and migration of Norwegian spring spawning herring in the Norwegian Sea
Melle, Webjørn; Røttingen, Ingolf; Skjoldal, Hein Rune (ICES CM Documents;1994/R:9, Working paper, 1994)After spawning on the shelf off Møre, Western Norway, the spawning stock of Norwegian spring spawning herring migrates to the Norwegian Sea for feeding. Simultaneously, the adolescent part of the stock leaves the wintering ... -
A Framework for Communicating Qualities of Indicators
Hauge, Kjellrun Hiis; Heldal, Hilde Elise; Olsen, Erik; Skjoldal, Hein Rune (ICES CM documents, Working paper, 2003)There is a growing focus on ecosystem-based indicators and what qualities they need to satisfy. However, the qualities and the characteristics of the already existing indicators vary substantially. Due to both scientific ... -
Growth of capelin in relation to zooplankton biomass in the Barents Sea
Gjøsæter, Harald; Skjoldal, Hein Rune; Hassel, Arne (ICES CM Documents;1995/P:5, Working paper, 1995)Growth of capelin in the Barents Sea stock has been found to vary considerably both between years and between different parts of the distribution area. The aim of this paper is to compare such growth variations with ... -
Impact of grazin from capelin (Mallotus villosus) on zooplankton: a case study in the northern Barents Sea in August 1985
Hassel, Arne; Skjoldal, Hein Rune; Gjøsæter, Harald; Loeng, Harald; Omli, Lena (ICES CM Documents;1991/L:62, Working paper, 1991)The distribution of capelin was mapped in the area east of Hopen. Zooplankton was sampled with Juday net and 1m^2 MOCNESS sampler, and analyzed with respect to hydrography and capelin abundance. The capelin "front" ... -
Plankton biomass, production and variability in the Norwegian Sea ecosystem
Melle, Webjørn; Rey, Francisco; Ellertsen, Bjørnar; Skjoldal, Hein Rune (ICES CM documents, Working paper, 2004) -
Preliminary report from the sea-going workshop in Norway June 1993 on intercomparison and evaluation of methods for sampling and determination of zooplankton distribution and biomass
Skjoldal, Hein Rune; Wiebe, Peter H.; Knutsen, Tor; Postel, Lutz (ICES CM Documents;1993/L:45, Working paper, 1993)A sea-going workshop was arranged from 2 to 13 June 1993 in Storfjorden at Møre on the west coast of Norway. The workshop was a two-ship operation involving the Norwegian R/V "Johan Hjort" and the German R/V "A.V. Humboldt". ... -
Reproduction of zooplankton in relation to initiation of spring phytoplankton bloom in the Barents Sea
Melle, Webjørn; Skjoldal, Hein Rune; Hassel, Arne; Rey, Francisco (ICES CM Documents;1987/L:30, Working paper, 1987)The phytoplankton spring bloom development and zooplankton reproduction were investigated in April 1986 in the central and northern Barents Sea. Different stages of phytoplankton bloom development were found, reflecting ... -
Seasonal development of plankton in the Barents Sea: A conceptual model
Rey, Francisco; Skjoldal, Hein Rune; Hassel, Arne (Working paper, 1987)Capelin (Mallotus villosus) is a small salmonid fish that forms the basis of one of the most important fisheries in the Barents Sea. Relatively large variations in growth of capelin prompted ecological investigations ... -
Spawning and development of Calanus spp. in the Barents Sea
Skjoldal, Hein Rune; Melle, Webjørn (ICES CM Documents;1994/L:22, Working paper, 1994)From 1986 to 1988 eight cruises were conducted in the Barents Sea, covering Atlantic water in central parts of the Sea and meltwater and Arctic water in the Polar front region. During the cruises hydrography, ... -
The Jutland Current: Nutrients and physical oceanographic conditions in late autumn 1989
Aure, Jan; Svendsen, Einar; Rey, Francisco; Skjoldal, Hein Rune (ICES CM Documents;1990/C:35, Working paper, 1990)Hydrography, currents, nutrients, water transparency, in situ chlorophyll fluorescence and primary production were studied during a cruise with R/V "G.O. Sars" to the west coast of Denmark, Skagerrak and Kattegat from ... -
Underwater optics and behavioral responses of krill to presence of fish predators affect fish-plankton interactions
Kaartvedt, Stein; Skjoldal, Hein Rune; Melle, Webjørn; Knutsen, Tor (ICES CM Documents;1993/L:43, Working paper, 1993)In clear oceanic waters off the Norwegian shelf and in outer shelf waters, mesopelagic fish (Maurolicus muelleri) were located at approximately 200 m by day. Across a front into water of lower light penetration, M. ...