Blar i Published in cooperation with others på forfatter "Øritsland, Torger"
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Aerial and visual surveys to estimate harp seal pup production in the Greenland Sea
Øien, Nils; Øritsland, Torger (ICES CM documents, Working paper, 1993)In March-April 1991 a combined expedition using fixed-wing aircraft and ship-borne helicopter was carried out to estimate harp seal pup production in the Greenland Sea (the West Ice). Photographs were taken from the ... -
Current problems and research related to interactions between marine mammals and fisheries in Norwegian coastal and adjacent waters
Bjørge, Arne; Christensen, Ivar; Øritsland, Torger (ICES CM documents, Working paper, 1981)Current research and provisional results on the food items and feeding rates of killer whales, minke whales, grey seals, common seals and harp seals are presented. Commercial fish species constitute the major part of the ... -
Feeding habits of northeast atlantic harp seal (Phoca groenlandica) along the summer ice edge of the Barents Sea
Lydersen, Christian; Angantyr, Lars Anker; Wiig, Øystein; Øritsland, Torger (ICES CM documents, Working paper, 1989)Stomachs from 58 harp seals Phoca groenlandica from the northern parts of the Barents Sea were collected between August 20 and September 5 1987. Fiftysix of the stomachs contained identifiable contents. The amphipod ... -
Norway: Seals. In: Marine mammals Committee
Øritsland, Torger (ICES CM documents, Working paper, 1974) -
Norway: Seals. In: Marine Mammals Committee
Øritsland, Torger (ICES CM documents, Working paper, 1978) -
Norwegian Seal Research
Øritsland, Torger (ICES CM documents, Working paper, 1967) -
Publication of catch statistics and routine biological data for North Atlantic seals.
Øritsland, Torger (ICES CM documents, Working paper, 1974) -
Recent age compositions and aberrant migration patterns of the Barents Sea stock of harp seals Phoca groenlandica
Nilssen, Kjell Tormod; Haug, Tore; Øritsland, Torger; Lindblom, Lotta; Kjellqwist, Sten Anders (ICES CM Documents;1996/N:4, Working paper, 1996)Since 1978, and in particular in 1986-1988, large numbers of harp seals Phoca groenlandica have invaded coastal waters of North Norway during winter and spring. After 1988 the harp seal invasions have been restricted to ... -
Tagging and recoveries of grey seals Halichoerus grypus in north Norway and on the Murman Coast, Russia
Henriksen, Gunnar; Haug, Tore; Kondakov, Andrej; Nilssen, Kjell Tormod; Øritsland, Torger (ICES CM documents, Working paper, 1996)A total of 787 grey seal pups were tagged between Vestfjorden in North Norway and the White Sea in North West Russia from 1989 to 1994. A majority of them (542) were tagged at the Ainov archipelago on the Murman coast. ... -
Trends in growth and reproductive parameters of Barents Sea harp seals
Kjellqwist, Sten Anders; Haug, Tore; Øritsland, Torger (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 ... -
Using mark-recapture methods to estimate pup production of harp seals (Phoca groenlandica) in the Greenland Sea
Øien, Nils; Øritsland, Torger (ICES CM documents, Working paper, 1992)During the period 1968-1991 16,917 harp seal pups have been tagged in the Greenland Sea. From 1976 until 1991, there have been 468 recoveries. 73 of these, mostly drowned in fishing gear or part of Inuit catches at Greenland, ... -
Whales and seals marked in the northeast Atlantic in 1974
Christensen, Ivar; Øritsland, Torger (ICES CM documents, Working paper, 1974)