Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "trål"
Now showing items 21-40 of 40
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Report of the International Bottom Trawl Survey Working Group (IBTSWG) [28 March – 1 April 2011 ICES Headquarters, Copenhagen]
(ICES CM documents;2011/SSGESST:06, Working paper, 2011) -
Report of the Planning Group on the North-east Atlantic Continental Slope Survey (PGNEACS) [9–11 June 2009 Tromsø, Norway]
(ICES CM documents;2009/LRC:03, Working paper, 2009) -
Report of the Study Group on Grid Sorting Systems in Trawls, Beam Trawls, and Seine Nets [Woods Hole, USA, 13- 14 April, 1996]
(ICES CM Documents;1996/B:1, Working paper, 1996) -
Report of the Study Group on Survey Trawl Gear for the IBTS Western and Southern Areas (SGSTG) [11- 13 February, 2004, Santander, Spain]
(ICES CM Documents;2004/B:1, Working paper, 2004) -
Report of the Study Group on Survey Trawl Standardisation (SGSTS) [16–18 April 2005, Rome, Italy]
(ICES CM Documents;2005/B:02, Working paper, 2005) -
Report of the Study Group on Survey Trawl Standardisation (SGSTS) [19-20 April 2007 Galway, Ireland]
(ICES CM documents;2007/FTC:04, Working paper, 2007) -
Report of the Study Group on Survey Trawl Standardisation (SGSTS) [23-24 April 2008 Tórshavn, Faroe Islands]
(ICES CM documents;2008/FTC:04, Working paper, 2008) -
Report of the Study Group on Survey Trawl Standardisation (SGSTS) [by correspondence]
(ICES CM documents;2009/FTC:09, Working paper, 2009) -
Report of the Working Group on Research and Engineering Aspects of Fishing Gear, Vessels and Equipment [8-9 May 1977, Bergen, Norway]
(ICES CM Documents;1978/B:4, Working paper, 1978) -
Sampling Atlantic salmon in the NE Atlantic during summer: methods of capture and distribution of catches
(ICES CM Documents;1996/M:12, Working paper, 1996)In July/ August 1991 the Institute of Marine Research (IMR, Norway) performed a pairtrawling (two boat trawl) experiment with a surface trawl to catch young herring in the northem Norwegian Sea. 34 postsmolts and two 1- ... -
Scale damage and survival of cod and haddock escaping from a demersal trawl
(ICES CM Documents;1991/B:44, Working paper, 1991)Cod (Gadus morhua L.) and haddock (Melanogrammus aeglefinus L.) escaping through the meshes of a cod-end (135 mm diamond meshes) or through a metal grid sorting device mounted in the foremost part of the cod-end, were ... -
Some information about CPUE in the Norwegian NEA-saithe trawl fishery
(Working paper, 2010-02) -
Survival of saithe (Pollachius virens L.) escaping through trawl meshes
(ICES CM Documents;1992/B:29, Working paper, 1992)A pilot study to estimate the survival of saithe escaping from a cod-end with 145 mm diamond meshes was done in April-May 1992 north of the Faroes. Escaped fish were collected in fine meshed net cages (2x2x5m aluminium ... -
Swept area variation with depth and its influence on stratified trawl surveys indices on Arcto-Norwegian cod
(ICES CM Documents;1986/D:18, Working paper, 1986)Stratified trawl surveys have been carried out in the Barents Sea and the Svalbard areas since 1981. Based on the assumption of a constant area swept by the trawl during a standard trawl haul at any depth, swept area ... -
The effect of different sweep lengths on length composition of bottom sampling trawl catches
(ICES CM Documents;1987/B:16, Working paper, 1987)Abundance estimates of North-east Arctic cod and haddock are given annually on the basis of combined bottom trawl and acoustic surveys. Both survey methods use data from bottom trawl catches in the calculations. The ... -
The measurement error of marine survey catches: the bottom trawl case
(ICES CM Documents;2001/P:6, Working paper, 2001)We have formulated a model for analyzing the measurement error of marine survey abundance estimates using data from parallel surveys (trawl haul or acoustic measurement). The measurement error is defined as the component ... -
Trawl sampling of small pelagic species off Angola. Effects of avoidance, towing speed, tow duration and time of day
(ICES CM Documents;1997/W:12, Working paper, 1997)A series of pelagic trawl sampling trials on pelagic species distributed near surface off Angola were conducted by R/V «Dr. Fridtjof Nansen» operating a medium sized pelagic trawl with a vertical opening of about 20 m. ... -
Variabilities in stomach contents of cod, collected by demersal and pelagic trawl in the southern part of the Barents Sea
(ICES CM Documents;1990/G:3, Working paper, 1990)Samples of Northeast Arctic cod stomachs were collected separately on demersal and pelagic stations at the same date in February 1986 and were analysed for length group 30-40cm. The results indicate that the mean value ... -
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 ... -
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 ...