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Trawl drag area and netting geometry
(ICES CM Documents;1979/B:26, Working paper, 1979)The bag of a trawlnet is considered as an elliptical cone, its wings as merely forward extensions of this cone. The dimensions of the cone are derived from the measured wingend spread and the headline height (gape) of ... -
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. ... -
Trends in growth and reproductive parameters of Barents Sea harp seals
(Working paper, 1993)Data from reproductive organs of Barents Sea harp seals Phoca groenlandica with corresponding age determinations have been analysed in combined samples collected during three periods: 1963-1972, 1976-1985 and 1990-1993. A ... -
Trial of a New, Split-beam Echo Sounder
(ICES CM Documents;1984/B:21, Working paper, 1984)The first at-sea trial of a new, split-beam echo sounder, the SIMRAD ES380 system, is described following a review of the split-beam principle, outline of its realization in hardware and software, and description of ... -
Trophic ecology of deepwater fishes associated with the continental slope of the eastern Norwegian Sea
(ICES CM Documents;1998/O:51, Working paper, 1998)In June 1995 and 1996 demersal fishes on the continental slope of the eastem Norwegian Sea were sampled to study distribution patterns and community structure. The diets of the more abundant slope species were characterised ... -
Trophic interactions affecting a key ecosystem component: a multi-stage analysis of the recruitment of the Barents Sea capelin
(ICES CM documents;2009/ C:07, Working paper, 2009) -
Trophic relationships and feeding-dependent growth in the North-East Arctic cod
(PINRO-IMR Symposium, Conference object, 1992) -
The Tuna Tagging Experiments in Norwegian Waters
(ICES CM Documents; 1959/Scombriform Fish Committee:92, Working paper, 1959) -
Types and frequency of malformations and mortality in eggs of Arcto-Norwegian cod: A field study
(ICES CM Documents;2001/N:12, Working paper, 2001)Embryological studies on living cod eggs in NUNC-trays showed that spontaneous malformations during embryo development are lethal. They are called natural egg mortality in contrast to external lethal factors, as ... -
An ultrasonic current meter
(ICES CM Documents;1971/C:24, Working paper, 1971) -
Ultrasonic tags reveal seasonal movements in red king crab (Paralithodescamtschaticus)
(ICES CM Documents;2010/K:14, Working paper, 2010-09-22)The red king crab was introduced to the Barents Sea in the 1960s and has spread widely both in Norwegian and in Russian waters, entailing a need to acquire knowledge of the biology and behaviour of the crab in these areas. ... -
Understanding environmental control on fish stocks and progress toward their inclusion in fish stock assessment
(ICES Marine Science Symposia, Conference object, 2002)The need to understand the impact of the environment on the fluctuations in fisheries yield in the Northeast Atlantic was a major motivation for the creation of ICES. From the very beginning, two main research tasks were ... -
Underwater optics and behavioral responses of krill to presence of fish predators affect fish-plankton interactions
(ICES CM Documents;1993/L:43, Working paper, 1993)In clear oceanic waters off the Norwegian shelf and in outer shelf waters, mesopelagic fish (Maurolicus muelleri) were located at approximately 200 m by day. Across a front into water of lower light penetration, M. ... -
Update of mark-recapture estimates of harp seal pup production in the Greenland Sea
(Working paper, 1993) -
Updated simulations of development in stock size and pup production for harp seals in the Greenland Sea 1946-1993, and corresponding catch and stock projections.
(Working paper, 1993)Applying the same model as in Ulltang (1989a, b), the development in stock size and pup production of the Greenland Sea hatp seal population is simulated for the period 1946-1993, assuming a pup production of 50000 in 1991 ... -
Upwelling incubators for eggs of the Atlantic halibut (Hippoglossus hippoglossus L.)
(ICES CM Documents;1987/F:20, Working paper, 1987)Incubators with upwelling water for eggs of the Atlantic Halibut are described. Tending and fate of the eggs where monitored, with special emphasis on egg mortality and bacterial activity. Bacterial activity in ... -
Use and selection of prey by harp seals during summer in the northern Barents Sea
(ICES CM documents, Working paper, 2005)The aim of this study was analyse harp seals prey use and selection during summer in Svalbard waters. A total of 41, 34 and 58 (including 24 faeces samples) from animals were sampled in 1996, 1997 and 2004. Krill was the ... -
The use of a digital computer in fisheries research
(ICES CM Documents;1971/B:16, Working paper, 1971) -
Use of a reference fleet of fishing vessels for collection of data [presentation]
(IMR/PINRO Joint Report Series;2/2005, Conference object, 2005) -
Use of a reference fleet of fishing vessels for collection of data [presentation]
(IMR/PINRO Joint Report Series;2/2005, Conference object, 2005)