Browsing by Author "Krafft, Bjørn A."
Now showing items 1-13 of 13
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Antarctic krill and apex predators in the South Orkney Islands area 2011, surveyed with the commercial fishing vessel Saga Sea
Krafft, Bjørn A.; Skaret, Georg; Calise, Lucio (Rapport fra Havforskningen;Nr. 6-2011, Working paper, 2011-05) -
Antarctic krill and apex predators in the South Orkney Islands area 2012, surveyed with the commercial fishing vessel Juvel
Skaret, Georg; Krafft, Bjørn A.; Trathan, Phil (Rapport fra Havforskningen;Nr. 9-2013, Working paper, 2013-04) -
Antarctic krill and ecosystem monitoring survey at South Orkney Islands in 2015, and assessing escape mortality of krill in trawls
Skaret, Georg; Krafft, Bjørn A.; Krag, Ludvig A.; Pedersen, Ronald (Rapport fra Havforskningen;9-2015, Working paper, 2015-05) -
Antarctic krill swarm characteristics in the Southeast Atlantic sector of the Southern Ocean
Krafft, Bjørn A.; Skaret, Georg; Knutsen, Tor; Melle, Webjørn; Klevjer, Thor A.; Søiland, Henrik (Journal article; Peer reviewed, 2012-09-28)Knowledge about swarm dynamics and underlying causes is essential to understand the ecology and distribution of Antarctic krill Euphausia superba. We collected acoustic data and key environmental data continuously across ... -
CClME North West Africa ecosystem survey. Guinea - Morocco 20 October - 21 December 2011
Krakstad, Jens-Otto; Michalsen, Kathrine; Alvheim, Oddgeir; Zaera, Diana; Bagøien, Espen; Krafft, Bjørn A.; García-Isarch, E.; Ramil, F.; Van Waerbeek, K. (Reports on surveys with the R/V Dr Fridtjof Nansen;2011410, Report, 2011) -
CCLME North West Africa ecosystem survey. Guinea - Morocco 5 May - 22 July 2012
Krakstad, Jens-Otto; Michalsen, Kathrine; Høines, Åge; Alvheim, Oddgeir; Zaera, Diana; Olsen, Magne; Bernandes, I.; Bagøien, Espen; Krafft, Bjørn A.; Ramos, A.; García-Isarch, E.; Muñoz, E.; Ramil, F.; Robinson, P. (Reports on surveys with the R/V Dr Fridtjof Nansen;2012404, Report, 2012) -
Distribution of Antarctic krill and apex predators at South Orkney Islands in 2014, and assessing escape mortality of krill in trawls
Krafft, Bjørn A.; Krag, Ludvig A.; Klevjer, Thor A.; Skaret, Georg; Pedersen, Ronald (Rapport fra Havforskningen;Nr. 10-2014, Working paper, 2014) -
Distribution of sex and age groups of ringed seals Pusa hispida in the fast-ice breeding habitat of Kongsfjorden, Svalbard
Krafft, Bjørn A.; Kovacs, Kit M.; Lydersen, Christian (Journal article; Peer reviewed, 2007-04-16)Spatial distribution of various age- and sex groups of ringed seals (N = 94; 19 adult males, 33 adult females and 42 subadults) was studied in their fast-ice breeding habitat in Kongsfjorden, Svalbard, during May 2004. ... -
Impact of climate change on Antarctic krill
Flores, Humberto; Atkinson, A.; Kawaguchi, So; Krafft, Bjørn A.; Milinevsky, Gennadi; Nicol, Stewart; Reiss, Christian; Tarling, Geraint Andrew; Werner, R.; Rebolledo, E. Bravo; Cirelli, V.; Cuzin-Roudy, J.; Fielding, Sophie; Groeneveld, J.J.; Haraldsson, Matilda; Lombana, Alfonso V.; Marschoff, Enrique R.; Meyer, Bettina; Pakhomov, Evgeny A.; Rombola, Emilce; Schmidt, Katrin; Siegel, Volker; Teschke, Mathias; Tonkes, Henrieke; Toullec, Jean-Yves; Trathan, Philip N.; Tremblay, Nelly; Van de Putte, Anton Pieter; van Franeker, Jan Andries; Werner, Thorsten (Journal article; Peer reviewed, 2012-07-03)Antarctic krill Euphausia superba (hereafter ‘krill’) occur in regions undergoing rapid environmental change, particularly loss of winter sea ice. During recent years, harvesting of krill has in - creased, possibly ... -
Prey selection of offshore killer whales Orcinus orca in the Northeast Atlantic in late summer: spatial associations with mackerel
Nøttestad, Leif; Sivle, Lise Doksæter; Krafft, Bjørn A.; Langård, Lise; Anthonypillai, Valantine; Bernasconi, Matteo; Langøy, Herdis; Fernö, Anders (Journal article; Peer reviewed, 2014-03-03)The traditional perception of prey species preference of killer whales Orcinus orca L. in the Northeast Atlantic has, to a large extent, been linked to herring Clupea harengus L. Few studies have investigated the feeding ... -
Size Selection of Antarctic Krill (Euphausia superba) in Trawls
Krag, Ludvig A.; Herrmann, Bent; Iversen, Svein A.; Engås, Arill; Nordrum, Sigve; Krafft, Bjørn A. (Journal article; Peer reviewed, 2014-08-08)Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl’s ability ... -
Studies of Antarctic krill, krill predators and trawl gear at South Orkney Islands, 2013
Krafft, Bjørn A.; Skaret, Georg; Krag, Ludvig A.; Trathan, Phil; Ying, Yiping (Rapport fra Havforskningen;Nr. 8-2013, Working paper, 2013) -
Time budgets and at-sea behaviour of lactating female Antarctic fur seals Arctocephalus gazella at Bouvetøya
Biuw, Martin; Krafft, Bjørn A.; Hofmeyr, G.J. Greg; Lydersen, Christian; Kovacs, Kit M. (Journal article; Peer reviewed, 2009-06-18)We present the first data on attendance patterns, at-sea movements and diving behaviour of Antarctic fur seals breeding at Bouvetøya (Bouvet Island), Southern Ocean. While other colonies have been extensively studied, this ...