Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "bestandsberegning"

The recovery of the Barents Sea capelin (Mallotus villosus) from a larval point of view

Fossum, Petter (ICES CM Documents;1991/H:13, Working paper, 1991)

The recovery of the Barents Sea Capelin is studied with larval surveys in the period 1986-91. Very few larvae were found in 1986,1987 and 1988, but the abundance of capelin larvae increased from 1989 back to the ...

The squid Todarodes sagittatus (Lamarck) investigations in Norwegian coastal and bank waters, July 1983 -January 1984, and west of the British Isles, March -April 1984.

Wiborg, Kristian Fredrik; Beck, Inger Marie (ICES CM Documents;1984/K:20, Working paper, 1984)

During the second half of 1983 Todarodes sagittatus invaded the coast of Norway to the same extent as in 1982. Materials for investigation were obtained from research cruises near Shetland in July, on the Viking Bank ...

The status of grey seals (Halichoerus grypus) in Norway

Wiig, Øystein (ICES CM Documents;1985/N:8, Working paper, 1985)

Information on the past and present distribution of grey seals in Norway is reviewed. The distribution of breeding seals is discontinous with the highest abundance now found between 63°N and 68°N and a concentration in ...

The use of data storage tags to study cod natural behaviour and availability to abundance surveys in the Barents Sea

Godø, Olav Rune; Michalsen, Kathrine (ICES CM Documents;1997/W:18, Working paper, 1997)

Vertical movements of fish stocks can be studied by means of acoustic data from surveys, and diurnal related cycles in behaviour is often reported. To what extent the movements observed by this method reflect behaviour ...

The use of personal knowledge in stock assessment

Hauge, Kjellrun Hiis (ICES CM Documents;1998/T:16, Working paper, 1998)

The focus on the precautionary approach, sustainable fisheries and ecological management requires knowledge about the uncertainty of stock assessments. An increasing number of working groups in the ICES system ...

The Working Group on Methods of Fish Stock Assessment [Newfoundland, 20- 27 June, 1991]

ICES (ICES CM Documents;1991/Assess:25, Working paper, 1991)

Timely evaluation of stock status based on scientific surveys, an update

Pennington, Michael; Nakken, Odd (ICES CM documents, Working paper, 2006)

Trawl avoidance as a source of error in estimates of the prevalence of Icthyophonus hoferi disease in Norwegian spring spawning herring (Clupea harengus L.) in the feeding area

Kvalsvik, Kurt; Skagen, Dankert W. (ICES CM Documents;1995/H:8, Working paper, 1995)

Summary: Results are presented from a survey in the Norwegian Sea in the summer 1993, where the abundance and distribution of herring was investigated, using a high resolution sonar and pelagic trawling at the surface. ...

Trawl sampling of small pelagic species off Angola. Effects of avoidance, towing speed, tow duration and time of day

Luyeye, Nkosi; Coetzee, Janet; Boyer, D.; Misund, Ole Arve (ICES CM Documents;1997/W:12, Working paper, 1997)

A series of pelagic trawl sampling trials on pelagic species distributed near surface off Angola were conducted by R/V «Dr. Fridtjof Nansen» operating a medium sized pelagic trawl with a vertical opening of about 20 m. ...

The Tuna Tagging Experiments in Norwegian Waters

Hamre, Johannes (ICES CM Documents; 1959/Scombriform Fish Committee:92, Working paper, 1959)

The use of Medium-Term Forecasts in advice and management decisions for the stock of Norwegian spring spawning herring (Clupea harengus L.)

Bogstad, Bjarte; Røttingen, Ingolf; Sandberg, Per; Tjelmeland, Sigurd (ICES CM documents, Working paper, 2000)

Medium-term simulations on the stock development of Norwegian spring-spawning herring (Clupea harengus L.) have been carried out since 1994 by the ICES «Atlanto-Scandian Herring and Capelin Working Group», in 1996 renamed ...