Blar i ICES CM documents authored by IMR scientists (1949-2011) på emneord "stock assessment"
Viser treff 641-660 av 660
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The predation of cod on capelin 1983 -1988
(ICES CM Documents;1988/G:55, Working paper, 1988) -
The recovery of the Barents Sea capelin (Mallotus villosus) from a larval point of view
(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.
(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
(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
(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
(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 CM Documents;1991/Assess:25, Working paper, 1991) -
Timely evaluation of stock status based on scientific surveys, an update
(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
(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
(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
(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.)
(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 ... -
Using artificial neural networks to combine acoustic and trawl data in the Barents and North Seas
(ICES CM documents, Working paper, 2004)Groundfish have a wide and variable distribution making the use of trawling alone a highly inadequate sampling method. Trawl data provide species identification and numbers over a very small area and habitat type while ... -
Validating three methods for making probability statements in fisheries forecasts.
(ICES CM documents, Working paper, 2000)We report on a test of three methods that have been used by ICES in making probability statements about fisheries forecasts to management agencies (XSA/WGMTERM, ICA/ICP, and a stochastic projection method that was first ... -
Vessel heave, and index for air bubble attenuation corrections
(ICES CM Documents;1991/B:37, Working paper, 1991)The possible use of vessel heave as a correction indicator for air bubble attenuation of acoustic signals from hull mounted transducers is investigated. Vessel heave was monitored along with the echo energy from the air ... -
Working Group on the Assessment of Demersal Stocks in the North Sea and Skagerrak [Copenhagen, 6- 14 October, 1992]
(ICES CM Documents;1993/Assess:5, Working paper, 1993) -
Working Group on the Assessment of Mackerel, Horse Mackerel, Sardine and Anchovy [Copenhagen, 22- 30 June, 1992]
(ICES CM Documents;1992/Assess:17, Working paper, 1992) -
Working Group on the Assessment of the Stocks of Sardine, Horse Mackerel, Anchovy [Copenhagen, 18- 27 June, 1991]
(ICES CM Documents;1991/Assess:22, Working paper, 1991) -
Workshop on Methods of Forecasting Herring Catches in Division IIIA and the North Sea [Lysekil, 10- 13 March, 1992]
(ICES CM Documents;1992/H:5, Working paper, 1992) -
Yield curves of North Sea herring
(ICES CM Documents;1972/H:8, Working paper, 1972)