Browsing Brage IMR by Title
Now showing items 11258-11277 of 11576
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Vertical distribution of cod, haddock and redfish; Impact on bottom trawl and acoustic surveys in the Barents Sea
(ICES CM Documents;1997/Y:16, Working paper, 1997)At a selected location in the Barents Sea acoustic observations, bottom- and pelagic trawl catch data were collected over a 10 day period. A large proportion of the fish were in the acoustic dead zone during the sampling ... -
Vertical distribution of cod, haddock and redfish; impact on bottom trawl and acoustic surveys in the Barents Sea
(PINRO-IMR Symposium, Conference object, 1997)At a selected location in the Barents Sea acoustic observations, bottom- and pelagic trawl catch data were collected over a 10 day period. A large proportion of the fish were in the acoustic dead zone during the sampling ... -
Vertical distribution of fish and krill beneath water of varying optical properties
(Journal article; Peer reviewed, 1996-06-06)The distribution of acoustical scattering layers of fish and krill changed markedly in concert with fluctuating fluorescence (chlorophyll a) in upper waters, possibly due to a varying 'shadow effect'. Beneath clear waters ... -
Vertical distribution of inorganic nanoparticles in a Norwegian fjord
(Peer reviewed; Journal article, 2023)Due to the analytical challenges of detecting and quantifying nanoparticles in seawater, the data on distributions of NPs in the marine environment is limited to qualitative studies or by ensemble measurements subject to ... -
Vertical distribution of pelagic fish eggs in relation to species, spawning behaviour and wind conditions
(ICES CM Documents;1981/G:77, Working paper, 1981)1. The mean reduction of egg diameter from March to April is from 1.45 to 1.39 mm and 1.44 to 1.38 mm for artificially and naturally spawned eggs of Arcto-Norwegian cod, respectively. This means a reduction of volume of ... -
Vertical distribution, behavior, chemical composition and metabolism of Stauroteuthis syrtensis (Octopoda: Cirrata) in the northwest Atlantic
(Journal article; Peer reviewed, 2009-02-03)The cirrate octopod Stauroteuthis syrtensis is a mesopelagic species commonly collected in the North Atlantic. Individuals were observed at depths >600 m and typically within 100 m of the bottom in three ~900 m deep canyons ... -
Vertical dynamics and reproductive behaviour of farmed and wild Atlantic cod Gadus morhua
(Journal article; Peer reviewed, 2009-09-04)Rapid development of fish mariculture and efforts to restock depleted populations have raised concerns about the effects on wild populations and the risk of genetic introgression from hybridisation. Reproduction of many ... -
Vertical dynamics and reproductive behaviour of farmed and wild Atlantic cod Gadus morhua
(Journal article; Peer reviewed, 2009-09-04)Rapid development of fish mariculture and efforts to restock depleted populations have raised concerns about the effects on wild populations and the risk of genetic introgression from hybridisation. Reproduction of many ... -
Vertical dynamics and reproductive behaviour of farmed and wild Atlantic cod Gadus morhua
(Journal article; Peer reviewed, 2009-09-04)Rapid development of fish mariculture and efforts to restock depleted populations have raised concerns about the effects on wild populations and the risk of genetic introgression from hybridisation. Reproduction of many ... -
Vertical entrance into a trawl of Barents Sea gadoids as studied with a two level fish trawl
(ICES CM Documents;1985/B:46, Working paper, 1985)Catch figures of different demersal species(cod, haddock, saithe etc.) in the cod-ends of a two level trawl were examined using variable height of the separating panel (0.5, 0.75, 1.0 and 1.5 m). Cod enters the trawl ... -
Vertical migration in adult Atlantic cod (Gadus morhua)
(Journal article; Peer reviewed, 2007-11-21)We investigate the trade-offs associated with vertical migration and swimming speed of Atlantic cod (Gadus morhua) using an adaptive individual-based model. Simulations with varying distribution and occurrence of prey, ... -
Vertical migrations of a deep-sea fish and its prey
(Journal article; Peer reviewed, 2014-05-23)It has been speculated that some deep-sea fishes can display large vertical migrations and likely doing so to explore the full suite of benthopelagic food resources, especially the pelagic organisms of the deep scattering ... -
Vertical salmon lice behaviour as a response to environmental conditions and its influence on regional dispersion in a fjord system
(Journal article; Peer reviewed, 2014-06-04)The salmon louse Lepeophtheirus salmonis is a major parasite of salmon, and is able to travel between farms during its pelagic phases. We investigated the spatial dispersion of L. salmonis planktonic stages in the ... -
Vertikalfordeling av fiskeyngel utenfor Nord-Norge i juni-august [HELP 40]
(help, Research report, 1991)l perioden 1977-91 ble utbredelsen av fiskeyngel langs kysten undersøkt i juni-august med en pelagisk trål i de øvre 50 m. l perioden 1977-81 bie dette gjort med todelte trekk hvorav det ene ble "tatt i overflaten med ... -
Veslefrikk og Gullfaks råoljer. Effekter på torskeegg og -Iarver ved kort eksponeringstid til lave korisentrasjoner av vannløslig fraksjon
(Working paper, 1992)Det er utført korttids eksponering av torskeegg og -larver til den vannløslige fraksjonen, WSF, av Gullfaks og Veslefrikk råolje. Torskeeggene ble eksponert på forskjellige utviklingsstadier, i forskjellige oljekonsentrasjoner ... -
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 ... -
Vestfjordundersøkelsene 1978, 1, Ferskvannsbudsjett og vindforhold
(Fisken og havet, Research report, 1982)Mean monthly values of freshwater run off to the different parts of Vestfjorden has been computed. About 90 per cent of the run off comes from the eastern side of the fjord. There is a pronounced yearly amplitude of the ... -
Vestlandstoktene 1954 - 1968
(Fisken og havet - Serie B, Working paper, 1974) -
Veterinary drug use in United States net pen Salmon aquaculture: Implications for drug use policy
(Peer reviewed; Journal article, 2020)Aquaculture now produces nearly half of the seafood consumed globally. Atlantic salmon (Salmo salar) is one of the top aquaculture products and the most valuable farmed marine finfish species in the United States (U.S.). ...