Blar i Havforskningsinstituttet på emneord "harp seal"
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A study of genetic variation in northeast Atlantic harp seals (Pagophilus groenlandicus)
(ICES CM Documents;1991/N:5, Working paper, 1991)16 enzymes were examined for genetic studies of the harp seal population structure in the Northeast Atlantic. Muscle and liver samples were collected in the West Ice off Jan Mayen and in the Eastern Barents Sea in 1987, ... -
Diet of harp seals (Phoca groenlandica) feeding between the breeding and moulting seasons in the southern Barents and White Seas
(ICES CM Documents;1993/N:8, Working paper, 1993)The harp seal Phoca groenlandica is the most abundant seal species in the Barents Sea. In order to evaluate the ecological importance of the species, diet studies have recently been carried out at various times of the ... -
Estimating Abundance of Seals in a Drifting Environment: 2005: Pup Production of Harp Seals, Pagophilus groenlandicus, in the Northwest Atlantic
(ICES CM Documents;2005/R:06, Working paper, 2005)Photographic and visual aerial surveys to determine current pup production of northwest Atlantic harp seals were conducted off Newfoundland and Labrador (the “Front”), and in the Gulf of St. Lawrence during March 2004. ... -
Estimation of harp seal pup production in the Greenland Sea using spatial analysis on aerial survey data
(ICES CM documents, Working paper, 2005)From 14 March to 6 April 2002 aerial surveys were carried out in the Greenland Sea packice to assess the pup production of the Greenland Sea population of harp seals Pagophilus groenlandicus. One xed-wing twin-engined ... -
Estimation of Pup Production of Hooded and Harp Seals in the Greenland Sea in 2007: Reducing Uncertainty Using Generalized Additive Models
(Journal article; Peer reviewed, 2010-02-11)The pup production of the Greenland Sea populations of hooded and harp seals were assessed in aerial surveys using two aircrafts for reconnaissance flights and photographic surveys along transects over the whelping areas ... -
Fatty acids in harp seal blubber do not necessarily reflect their diet
(Journal article; Peer reviewed, 2011-03-28)The predator–prey relationship with respect to fatty acids (FAs) was studied in 57 harp seals Pagophilus groenlandicus and 16 potential prey species collected simultaneously in the northwestern Barents Sea in May–June 2006. ... -
Field studies of harp seal (Phoca Groenlandica) distribution and feeding ecology in the Barents Sea in september 1990
(ICES CM Documents;1991/N:3, Working paper, 1991)The harp seal Phoca groenlandica is the most abundant seal species in the Barents Sea, and it may be a significant predator on other marine resources in this area. In order to evaluate the ecological role of harp seals, ... -
Functional relationship between harp seal body condition and available prey in the Barents Sea
(Journal article; Peer reviewed, 2013-06-12)The Barents Sea ecosystem has undergone substantial ecological fluctuations over the past 40 yr, including large variations in the abundance of capelin Mallotus villosus, herring Clupea harrengus, krill Thysanoessa sp. and ... -
Grønlandssel
(Havets ressurser og miljø, Chapter, 2007)The Northeast Atlantic stocks of harp seals are commercially exploited by Norway and Russia. The stocks are assessed every second year by the Joint ICES/NAFO Working Group on Harp and Hooded Seals. The assessments are ... -
Grønlandssel - eit vandrande flokkdyr
(Havforskningstema, Working paper, 1998) -
Grønlandssel i Nordatlanteren
(Havforskningsnytt, Working paper, 1994) -
Harp seal (Phoca Groenlandica) invasions in north Norwegian coastal waters: A preliminary report on age composition and feeding habits
(ICES CM Documents;1990/N:6, Working paper, 1990)Since 1978 large numbers of harp seals (Phoca groenlandica) have invaded areas of North Norway in winter and spring. In 1987 and 1988 dramatic increases occurred both in magnitude and geographic extent of these seal ... -
Ishavssel: fangst, bestandssituasjon, og forskning. 2011
(Working paper, 2011-10-19)Spørsmål knyttet til forvaltning og fangst av ishavsselene grønlandssel og klappmyss blir tradisjonelt drøftet i en felles arbeidsgruppe nedsatt innafor rammen av Den Blandete Norsk-Russiske Fiskerikommisjonen. Arbeidsgruppas ... -
Ishavssel: fangst, bestandssituasjon, og forskning. 2012
(Working paper, 2012-10-31)Spørsmål knyttet til forvaltning og fangst av ishavsselene grønlandssel og klappmyss blir tradisjonelt drøftet i en felles arbeidsgruppe nedsatt innafor rammen av Den Blandete Norsk-Russiske Fiskerikommisjonen. Arbeidsgruppas ... -
Ishavssel: Fra ungeproduksjon til kvote
(Havforskningsnytt, Working paper, 2004) -
Norsk fangst og undersøkelse av sel i 1994 (Norwegian catches and investigations of seals in 1994)
(Fisken og havet, Research report, 1995)Four Norwegian vessels caught a total of 17621 harp and 492 hooded seals in the West Ice (Greenland Sea) and the East Ice (Barents Sea) in 1994. The Norwegian Marine Mamma1 Research Programme was brought to an end in an ... -
Norsk fangst og undersøkelse av sel i 1995 (Norwegian catches and investigations of seals in 1995)
(Fisken og havet, Research report, 1996)Three Norwegian vessels caught a total of 15070 harp and 933 hooded seals in the West Ice (Greenland Sea) and the East Ice (Barents Sea) in 1995. These catches include 945 weaned pups and 22 adult harp seals taken under ... -
Preliminary data on feeding and condition of Barents Sea harp seals (Phoca Groenlandica) throughout the year
(ICES CM Documents;1992/N:5, Working paper, 1992)In order to evaluate the ecological role of the most abundant seal species in the Barents Sea, the harp seal Phoca groenlandica, field studies have been carried out in September 1990, in February, March/April, June and ... -
Prey consumtion by Barents sea harp seals in the period 1990-2005
(ICES CM documents, Working paper, 2006)The Barents Sea ecosystem has experienced major fluctuations in species abundance in the past 20-30 years. The mechanisms behind these fluctuations are complex and arise from numerous interactions between species and the ... -
Recent age compositions and aberrant migration patterns of the Barents Sea stock of harp seals Phoca groenlandica
(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 ...