Browsing ICES CM documents authored by IMR scientists (1949-2011) by Title
Now showing items 3096-3115 of 3138
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Verified acoustic identification of Atlantic mackerel
(ICES CM documents, Working paper, 2004)Calibrated, digitised data from simultaneously working multi-frequency echo sounders with nearly identical and overlapping acoustic beams have been used to generate new, synthetic echograms where only targets identified ... -
Vertical distribution (0–1000 m) of gelatinous zooplankton and particulate matter (60ìm<<5mm) along the Mid Atlantic ridge in the North Atlantic. Potential impact of appendicularians on particle aggregation
(ICES CM documents;2007/F:04, Working paper, 2007) -
Vertical distribution and feeding of cod larvae in relation to occurrence and size of prey organisms
(ICES CM Documents;1977/L:33, Working paper, 1977) -
Vertical distribution and population structure of copepods along the northern Mid-Atlantic Ridge
(ICES CM documents;2007/F:07, Working paper, 2007)The Mid-Atlantic Ridge (MAR) between 40°N (Azores) and 63°N (Iceland) is the largest topographic feature in the North Atlantic Ocean. Despite generally limited surface production, there is evidence that the mid-ocean ridges ... -
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 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 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 ... -
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 ... -
Viral haemorrhagic septicaemia in Norway—possible interactions between farmed and wild fish
(ICES CM documents;2010/J:09, Working paper, 2010) -
Vital population rates across multiple spatial scales: A geostatistical analysis
(ICES CM documents;2005/L:01, Working paper, 2005)Population and community level processes change across multiple spatial scales. Understanding these patterns and the factors that drive them are essential for the development of spatial approaches in fisheries management. ... -
Voice controlled form filling
(ICES CM Documents;1991/C:22, Working paper, 1991)During field work in the sea - in particular when collecting data like weight, length, sex, stadium, etc. from fish samples, the observations are first manually noted in a standardized sampling form. One popular form ... -
Vulnerability to predation of small cod (Gadus morhua) that escape from a trawl
(ICES CM Documents;1995/B:15, Working paper, 1995)Studies of the vulnerability to gear damage of fish that have been caught in a trawl but have escaped through the codend meshes have focussed on determining survival rates. This study examines the risk of predation in ... -
Water fluxes through the Barents Sea
(ICES CM Documents;1995/Mini:10, Working paper, 1995)The physical oceanographic conditions in the Barents Sea depend mainly on the variability in the Atlantic inflow from the Norwegian Sea and the inflow of Arctic water from the Kara Sea and the Arctic Ocean. The transport ... -
Water movements in the central part of the Norwegian Sea based on recent material
(ICES CM Documents;1964/138, Working paper, 1964) -
Weaning trials with cod fry on artificial diets
(ICES CM Documents;1990/F:47, Working paper, 1990)Three experiments with different size groups of cod fry, 13, 49 and 465 mg wet-weight were offered 6 different artificial diets. The experiments lasted for 28 days. Growth, and for the medium size-group chemical composition ... -
WebGR – storing images of biological material and creating a framework to promote the implementation of sound statistical analysis in age calibration
(ICES CM documents;2009/N:09, Working paper, 2009)The objective of the WebGR project is to develop a set of web services to support the organisation and data analysis of calibration workshops, both for age and maturity information, implemented in a coherent tool installable ... -
WESTHER: A multidisciplinary approach to the identification of herring (Clupea harengus L.) stock components west of the British Isles using biological tags and genetic markers.
(ICES CM documents;2005/K:01, Working paper, 2005)A considerable amount of research has been carried out on the complex of commercially important herring stocks to the west of the British Isles, from the south-west of Ireland and the Celtic Sea to the north-west of Scotland. ... -
Whales and seals marked in the northeast Atlantic in 1974
(ICES CM documents, Working paper, 1974) -
What controls the spatial distribution of spawning anchovy in the Bay of Biscay? : a multi-model approach
(ICES CM documents;2010/G:05, Working paper, 2010)Spawning is an important phase for short-lived species like anchovy (Engraulis encrasicolus) as it ensures the renewal of the population through the recruitment process. Data from the PELGAS (PELagiques GAScogne) surveys, ... -
When acoustics is not enough – towards a measurement of sandeel availability
(ICES CM documents;2009/I:16, Working paper, 2009)Experimental surveys in the peak feeding season of sandeel (April-May) show that the abundance and geographical distribution of schooling lesser sandeels (Ammodytes marinus) can be acoustically measured, but the density ...