Browsing Brage IMR by Subject "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925"
Now showing items 181-200 of 732
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Measuring the effect of changes in catchability on the variance of marine survey abundance indices
(ICES CM Documents;1992/D:9, Working paper, 1992)The average catch per tow by a research vessel survey is often used as an index of abundance. An estimate of the variance of such indices that is based only on the between station variability in catch may underestimate ... -
Measuring uncertainty in trawl surveys: implementation in DATRAS
(ICES CM documents, Working paper, 2006)Abstract The basic data from several ICES coordinated trawl and beam trawl surveys in the Baltic Sea, the North Sea, the area west of Scotland and France are stored in the DATRAS database in the ICES Secretariat; every ... -
Merking av rusefanget torsk i områdene Smøla-Helgeland
(Fisken og havet;1964 - Nr. 2, Journal article, 1964)The recaptures of trap net caught cod tagged during January and February 195G and 1957 and November 1957 in different localities along the Norwegian Coast (Fig. l) have been studied. On the tagging localities the cod migrate ... -
Metodeutvikling for bestandestimering av hval. Sluttrapport til NFFR.
(Working paper, 1991-06)Innledning: For å få et bestandsanslag for nordøstatlantisk vågehval har en de siste årene konsentrert seg om å gjennomføre linjetransekttellinger. Det største linjetransekttelletoktet fra norsk side ble gjennomført ... -
Migration of western mackerel to the North Sea 1973 - 1988
(ICES CM Documents;1989/H:20, Working paper, 1989)The latest years, it is evident that most of the mackerel present in the North Sea belongs to the Western stock, since the yearly catches by far exceed the presumed size of the North Sea stock. The Norwegian tagging ... -
Milliardtap, Terje Jensen?
(Others, 2008-10-29) -
Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine
(Journal article; Peer reviewed, 2010-10)A new method was used to study the effect of crowding and subsequent slipping from a purse seine on the mortality of Atlantic mackerel (Scomber scombrus L.). Mackerel were allowed to swim from a purse seine through a ... -
Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine
(Journal article; Peer reviewed, 2010-10)A new method was used to study the effect of crowding and subsequent slipping from a purse seine on the mortality of Atlantic mackerel (Scomber scombrus L.). Mackerel were allowed to swim from a purse seine through a ... -
Mortality of North Sea herring that is crowded and subsequently slipped from a purse seine
(ICES CM documents;2009/M:16, Working paper, 2009)Catch regulation by slipping whole or parts of the catch has traditionally been used in NE-Atlantic purse seine fisheries for pelagic species if the catches are considered too big or the quality or size of the fish is ... -
Natural fish behaviour and catchability of groundfish
(ICES CM Documents;1994/G:14, Working paper, 1994)Imprecision in estimates of abundance and population parameters obtained from trawl surveys could be reduced if the sources of variability were understood and properly described. Fish behaviour in relation to sampling ... -
Near-bottom sampling with bottom and pelagic trawls
(ICES CM Documents;1987/B:15, Working paper, 1987)The Institute of Marine Research, Bergen, has carried out combined bottom trawl and acoustic surveys for cod and haddock in the Barents Sea - Svalbard area since 1981. These investigations have demonstrated clearly that ... -
Nesten fritt for tobis [Tore Johannessen uttaler seg om gytebestanden]
(Others, 2008-08-20) -
Norge er lavest på minstemålet [Odd Smedstad uttaler seg i Fiskaren om minstemål, maskevidde og kvoter]
(Fiskaren;, Others, 2008-03-07) -
Norske pigghåundersøkelser i 1963
(Fisken og havet;1964 - Nr. 4, Journal article, 1964)The present article is an account of the Norwegian investigations of the spur-dog in 1963. The results of the tagging experiments are considered with respect to the distribution of the recaptures in time and localities. A ... -
Norwegian acoustic survey of North East Arctic cod on the spawning grounds off Lofoten
(ICES CM Documents;1997/Y:18, Working paper, 1997)An acoustic survey of the spawning stock of North East Arctic Cod off Lofoten has been performed annually in March-April since 1982. The estimates for 1985-1997 have been recalculated and mean length and weight at age ... -
Norwegian and international regulations in the Norwegian whaling for minke whales, Balanoptera Acutorostrata, and small whales
(ICES CM Documents;1976/N:18, Working paper, 1976) -
The Norwegian industrial trawl fishery in the North Sea.
(ICES CM Documents;1978/G:15, Working paper, 1978)Linear programming is used to demonstrate a way to maximise the total catch in a mixed fishery. Constraints are set by quotas, as well as requirements that the total catch should not be too unevenly distributed between ... -
Norwegian investigations on the deep sea shrimp (Pandalus borealis) in the Barents Sea in 1982
(ICES CM Documents;1982/K:12, Working paper, 1982)