Browsing Published in cooperation with others by Author "Ulltang, Øyvind"
Now showing items 1-19 of 19
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A possible reorganization of the assessments in the northern part of the ICES area
Ulltang, Øyvind (ICES CM Documents;1985/Assess:21, Working paper, 1985) -
ACFM comments on stock assessment working group reports: A supplement (for working groups) to the ACFM reports of November 1984 and May 1985
Ulltang, Øyvind (ICES CM Documents;1985/Assess:20, Working paper, 1985) -
ACFM comments on stock assessment working group reports: A supplement (for working groups) to the ACFM reports of November 1985 and May 1986
Ulltang, Øyvind (ICES CM Documents;1986/Assess:24, Working paper, 1986) -
ACFM comments on stock assessment working group reports: A supplement (for working groups) to the ACFM reports of November 1986 and May 1987
Ulltang, Øyvind (ICES CM Documents;1987/Assess:25, Working paper, 1987) -
The collapse of the Norwegian spring spawning stock
Dragesund, Olav; Ulltang, Øyvind (ICES CM Documents;1972/H:11, Working paper, 1972) -
The effects of regulations of the mackerel fishery in the North Sea
Hamre, Johannes; Ulltang, Øyvind (ICES CM Documents;1972/H:30, Working paper, 1972) -
Further studies on stock size fluctuations and rate of exploitation of the Norwegian spring spawning herring, 1950 - 1971
Dragesund, Olav; Ulltang, Øyvind (ICES CM Documents;1973/H:19, Working paper, 1973) -
Migrations and stock size of herring in the northern North Sea in 1966; analyses of Norwegian tagging experiments
Bakken, Erling; Ulltang, Øyvind (ICES CM Documents;1972/H:29, Working paper, 1972)8000 herring were tagged with internal steel tags in the summer of 1966; 4000 were released in the north-eastern North Sea and 4000 east of Shetland. On the basis of returned tags during the first year after tagging, ... -
The relation between fishing mortality on juveniles and total yield of Arcto-Norwegian cod
Ulltang, Øyvind (ICES CM Documents;1973/F:41, Working paper, 1973) -
Report from mesh selection experiments on Pandalus borealis in Norwegian waters
Thomassen, Tore; Ulltang, Øyvind (ICES CM Documents;1975/K:51, Working paper, 1975) -
Report on the Norwegian sampling programme for industrial catches of herring, mackerel and capelin
Hamre, Johannes; Ulltang, Øyvind; Østvedt, Ole Johan (ICES CM Documents;1974/H:27, Working paper, 1974) -
Review of the handling of predation data and data on eventual changes in weight at age and age at first maturity by different assessment working groups
Ulltang, Øyvind (ICES CM Documents;1984/Assess:22, Working paper, 1984) -
Risk analysis and biological knowledge
Ulltang, Øyvind (ICES CM Documents;1993/D:16, Working paper, 1993)The paper adresses the question whether we fully utilize the growth in biological knowledge in fish stock assessments and risk analyses. For illustrative purposes, repeated references are made to the assessment of the ... -
Some aspects of fishing patterns in relation to fishery management
Ulltang, Øyvind (ICES CM Documents;1975/H:52, Working paper, 1975) -
Some comments to the problem of adjusting TACs to mesh size changes.
Ulltang, Øyvind (ICES CM Documents;1979/G:56, Working paper, 1979)Mesh assessments are usually carried out by calculating "short term losses" and "long term gains" expected from a change in the minimum legal mesh size, assuming no change in total fishing effort or its distribution by ... -
Sources of errors in and limitations of Virtual Population Analysis (Cohort analysis)
Ulltang, Øyvind (ICES CM Documents;1976/H:40, Working paper, 1976) -
Stock size fluctuations and rate of exploitation of the Norwegian spring-spawning herring, 1950 - 1974
Dragesund, Olav; Ulltang, Øyvind (ICES CM Documents;1975/H:47, Working paper, 1975) -
Updated simulations of development in stock size and pup production for harp seals in the Greenland Sea 1946-1993, and corresponding catch and stock projections.
Ulltang, Øyvind (Working paper, 1993)Applying the same model as in Ulltang (1989a, b), the development in stock size and pup production of the Greenland Sea hatp seal population is simulated for the period 1946-1993, assuming a pup production of 50000 in 1991 ... -
Yield curves of North Sea herring
Ulltang, Øyvind (ICES CM Documents;1972/H:8, Working paper, 1972)