Browsing Brage IMR by Author "Bjørge, Arne"
Now showing items 1-20 of 20
-
Baleen whale distributions and prey associations in the Barents Sea
Skern-Mauritzen, Mette; Johannesen, Edda; Bjørge, Arne; Øien, Nils (Journal article; Peer reviewed, 2011-03-28)We investigated the spatial associations between minke Balaenoptera acutorostrata, fin B. physalus and humpback Megaptera novaeangliae whales and their prey in the Barents Sea in late summer of 2003 to 2007. During these ... -
Comparative habitat use and foraging behaviour of harbour seals and grey seals in Western Norway
Bjørge, Arne (ICES CM Documents;1995/N:1, Working paper, 1995)Adult harbour seals at Froan nature reserve, Central Norway, were tagged with VHF radio tags and depthvelocity, hart rate and stomach temperature sensors combined with ultrasonic transmitters. An automatic shore based ... -
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 ... -
Diet of the harbour seal, Phoca vitulina, in the Hvaler area in 1990 and 1991, compared to the abundance of fish in the area
Olsen, Marianne; Bjørge, Arne (ICES CM Documents;1992/N:19, Working paper, 1992)The harbour seal, Phoca vitulina, occurs in small groups along the entire coast of Norway. It is thought to interact with the commercial fisheries, both as predator and as final host for parasitic nematodes infecting ... -
Dispersal and By-Catch Mortality in Grey, Halichoerus grypus, and Harbour, Phoca vitulina, Seals Tagged at the Norwegian coast
Bjørge, Arne; Øien, Nils; Hartvedt, Siri; Bekkby, Trine (ICES CM documents, Working paper, 2000)The results of the study presented here are submitted to a refereed journal for consideration. The review and printing process may not be completed at the time of the 2000 ICES Annual Science Conference and the subsequent ... -
Geographic variation and acoustic structure of the underwater vocalization of harbor seal (Phoca vitulina) in Norway, Sweden and Scotland
Bjørgesæter, Anders; Ugland, Karl Inne; Bjørge, Arne (Journal article; Peer reviewed, 2004)The male harbor seal (Phoca vitulina) produces broadband nonharmonic vocalizations underwater during the breeding season. In total, 120 vocalizations from six colonies were analyzed to provide a description of the acoustic ... -
Gjenfangster i Norge av havert merket i Storbritannia
Bjørge, Arne; McConnell, Bernie (Fisken og havet, Research report, 1986)Since tagging of grey seals in Great Britain was initiated in 1951, a total of 61 seals has been recovered in coastal Norwegian waters. Most of the recovered seals had been tagged at the Orkney (35 recoveries) and the ... -
Harbor porpoise (Phocoena phocoena) in Norwegian waters
Bjørge, Arne; Aarefjord, Hilde; Kaarstad, Sølvi; Kleivane, Lars; Øien, Nils (ICES CM Documents;1991/N:16, Working paper, 1991)Recordings made on the Norwegian Sighting Survey 1988 and the North Atlantic Sighting Survey 1988 (NASS-89) indicate a divided off shore distribution during summer for harbour porpoises in Norwegian waters, with a southern ... -
Harbour seal Phoca vitulina habitat use and interactions with fisheries as explored by a combined GIS and population energetics model
Bjørge, Arne; Bekkby, Trine; Bakkestuen, Vegard; Framstad, Erik (ICES CM documents, Working paper, 2000) -
An isopod as intermediate host of cod-worm
Bjørge, Arne (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1979)Ten cod (Gadus morhua), caught at 30-50 m depth in the Froan area (64°N) on the Norwegian coast in October 1977, held an average of 53 cod-worm (Phocanema decipiens) larvae in their muscles. Stomach contents included ... -
Marine Mammals
Bjørge, Arne; Lydersen, Christian; Skern-Mauritzen, Mette; Wiig, Øystein (Fisken og havet, særnummer;2-2010, Research report, 2010-05) -
Nytt forskingsprogram om kyst- og fjordøkologi : New research programme focusing on coastal and fjord ecosystems
Bjørge, Arne (Havforskningsnytt, Working paper, 2008)The northern kelp forests in Porsangerfjorden have been significantly degraded by the large numbers of sea urchins grazing on the kelp plants. Meanwhile, in Hardangerfjorden, sugar kelp is becoming much scarcer and the ... -
Parasitic nematodes in stomachs of grey seals, Halichoerus grypus, and common seals, Phoca vitulina, along the Norwegian coast.
Bjørge, Arne (ICES CM Documents;1984/N:3, Working paper, 1984)The nematode infestation in stomachs of 55 grey and 127 common seals were examined in the period 1976-1980. The seals were caught in Norwegian coastal waters between 62° and 67° North. In 48 adult grey seals the infestation ... -
Reduksjon av tareskogen på Helgelandskysten
Sivertsen, Knut; Bjørge, Arne (Fisken og havet, Research report, 1980)Reduced densities of Laminaria have been reported from coastal waters in Sør-Trøndelag, Nord-Trøndelag and Nordland counties. A provisional study of algal vegetation and benthic fauna was made by diving west of Vega in ... -
Sjøens pattedyr 2010
Bjørge, Arne; Lydersen, Christian; Skern-Mauritzen, Mette; Wiig, Øystein (Fisken og havet, særnummer;2-2010, Research report, 2010-07) -
Statusrapport for Havforskningsinstituttets overvåkning av kystsel
Bjørge, Arne; Øien, Nils (Rapport, Working paper, 1999-10) -
Telling av steinkobbe ved Hvaler i 1983
Bjørge, Arne; Fagerheim, Kjell Arne; Mørkved, Brynjar (Fisken og havet, Research report, 1983)A survey was carried out on 10 August 1983 in order to count common seals, and all suitable haul out sites in the outer Hvaler area were examined. A total of 255 common seals were recorded in the area. The observed ... -
The relationship between seal abundance and cod worm (Phocanema decipiens) infestation in cod in Norwegian coastal waters
Bjørge, Arne (ICES CM Documents;1985/N:4, Working paper, 1985)A sample of 52 cods, Gadus morhua, caught close to a grey seal, Halichoerus grypus, haul out site, and a total of 652 cods from 18 commercial catches (average sample size 36 cods) were examined with regard to cod worm ... -
Undersøkelser av steinkobbe og havert i Rogaland og Finnmark i 1981
Bjørge, Arne; Bergflødt, Bjørn; Fagerheim, Kjell Arne; Øritsland, Torger; Skadsheim, Arnfinn (Fisken og havet, Research report, 1982)The outer coastline from Bømlafjorden to Jæren and Lysefjorden in Rogaland were surveyed 29 May-5 June. Another survey was carried out on the coast of Finnmark from Varangerfjorden to Sørøya 26 June-7 July 1981. In ... -
Variation in stomach temperature as indicator of meal size in harbour seal, Phoca vitulina
Bekkby, Trine; Bjørge, Arne (ICES CM Documents;1995/N:12, Working paper, 1995)To understand the role of the marine mammals as components in foodwebs, it is important to know the composition frequency and size of their meals. Marine mammals have a core body temperature of about 37°C, and feed mainly ...