Blar i Havforskningsinstituttet på emneord "demersal fish"
Viser treff 1-20 av 61
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Analysis of spatial variability of Georges Bank haddock (Melanogrammus aeglefinus) from trawl survey data using a linear regression model with spatial interaction
(ICES CM Documents;1990/D:36, Working paper, 1990)A regression model with spatially autocorrelated errors is used to test if there is systematic spatial variation across the study area in haddock catch per tow data from the NEFC annual fall survey from 1963 - 1987. A ... -
Botnfiskundersøkingar i Barentshavet (norsk sone) vinteren 1997
(Fisken og havet, Research report, 1997)Eit kombinert akustikk- og botntråltokt med sikte på å kartleggja utbreiing, mengde og vekst hos torsk, hyse, blåkveite og uerartene er gjennomført sidan 1981 i Barentshavet. Vinteren 1997 vart dekkinga svært mangelfull ... -
Botnfiskundersøkingar i Barentshavet (redusert område) vinteren 1998
(Fisken og havet, Research report, 1998)A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January- March) since 1981 in the Barents Sea. The target ... -
Botnfiskundersøkingar i Barentshavet vinteren 1996
(Fisken og havet, Research report, 1996)A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January- March) since 198 1 in the Barents Sea. The ... -
Botnfiskundersøkingar i Barentshavet vinteren 1999
(Fisken og havet, Research report, 1999)A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January- March) since 1981 in the Barents Sea. The ... -
Bunnfiskundersøkelser i Barentshavet sommeren 1995
(Fisken og havet, Research report, 1996)The report presents the results from the first in a series of surveys which the Institute of Marine Research (IMR) has inititated in order to monitor the stocks of demersal fish in the Barents Sea area. The survey was ... -
Bunnfiskundersøkelser i Barentshavet vinteren 1993
(Rapport fra senter for marine ressurser;Nr. 14 - 1993, Working paper, 1993) -
Bunnfiskundersøkelser i Barentshavet vinteren 1994
(Fisken og havet, Research report, 1994)A combined acoustic and bottom trawl survey aiming at obtaining indices of abundance and estimates of length and weight at age has been carried out each winter since 1981 in the Barents Sea. The target species are cod ... -
Bunnfiskundersøkelser i Barentshavet vinteren 1995
(Fisken og havet, Research report, 1995)Et kombinert akustikk- og bunntråltokt med sikte på å framskaffe mål for tallrikhet og utbredelse hos torsk, hyse, blåkveite og uerartene, samt lengde og vekt ved alder for torsk og hyse, er gjennomført siden 1981. ... -
Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience
(Journal article; Peer reviewed, 2007-12)Acoustic data are recorded continuously during the winter survey for demersal fish in the Barents Sea. This paper presents a method for using the information from the acoustic recordings between trawl stations in an attempt ... -
Demersal Fish Assemblages and Spatial Diversity Patterns in the Arctic-Atlantic Transition Zone in the Barents Sea
(Journal article; Peer reviewed, 2012-04-17)Direct and indirect effects of global warming are expected to be pronounced and fast in the Arctic, impacting terrestrial, freshwater and marine ecosystems. The Barents Sea is a high latitude shelf Sea and a boundary area ... -
Distribution, Population Biology, and Trophic Ecology of the Deepwater Demersal Fish Halosauropsis macrochir (Pisces: Halosauridae) on the Mid-Atlantic Ridge
(Journal article; Peer reviewed, 2012-02-22)Halosauropsis macrochir ranked amongst the most abundant and widespread demersal fishes on the mid-Atlantic Ridge of the North Atlantic (Iceland-Azores) with greatest abundance at 1700–3500 m. All sizes, ranging from 10–76 ... -
In situ determination of bottom trawl ground gear contact
(ICES CM documents, Working paper, 2001)Exact definition of towed distance with proper ground gear contact is an essential parameter in bottom trawl swept area estimates of fish abundance. Errors in this key parameter may lead to a first order bias in abundance ... -
Investigations on demersal fish in the Barents Sea in winter 1977
(ICES CM Documents;1977/F:23, Working paper, 1977) -
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 ... -
Preliminary report of the Norwegian groundfish survey at Bear Island and west-Spitsbergen in the autumn 1983
(ICES CM Documents;1984/G:46, Working paper, 1984)This report describes the results from a stratified bottom trawl survey carried out by R/V "Eldjarn" and M/Tr "Bøtrål 4" in the period 6 September to 1 October 1983. Cod were most abundant in the Bear Island area and ... -
Preliminary results from the winter 2000 demersal fish survey in the Barents Sea
(Working paper, 2000) -
Report of Division IIIA Demersal Stocks Working Group [Copenhagen, 25 February - 4 March, 1991]
(ICES CM Documents;1991/Assess:9, Working paper, 1991) -
Report of Division IIIA Demersal Stocks Working Group [Copenhagen, 28 February - 7 March, 1990]
(ICES CM Documents;1990/Assess:10, Working paper, 1990)