Blar i Brage IMR på forfatter "Krafft, Bjørn Arne"
-
Distribution and biomass estimation of Antarctic krill (Euphausia superba) off the South Orkney Islands during 2011-2020
Skaret, Georg; Macaulay, Gavin; Pedersen, Ronald; Wang, X.; Klevjer, Thor A.; Krag, L.A.; Krafft, Bjørn Arne (Peer reviewed; Journal article, 2023)Antarctic krill is a key species in the Southern Ocean and subject to the most extensive fishery in the Antarctic. The Norwegian Institute of Marine Research has conducted acoustic-trawl monitoring of krill off the South ... -
Employing a trawl independent multi-compartment towing rig to study selectivity of crustaceans in trawls
Krag, Ludvig Ahm; Krafft, Bjørn Arne; Engås, Arill; Herrmann, Bent (Conference object, 2016-09-22) -
Evaluation of Antarctic krill biomass and distribution off the South Orkney Islands 2011-2015
Skaret, Georg; Krafft, Bjørn Arne; Calise, Lucio; Watkins, J; Pedersen, Ronald; Godø, Olav Rune (;WG-EMM-15/54, Research report, 2015-06-22)Annual acoustic trawl surveys for krill monitoring have been carried out by the Institute of Marine research, Norway near the South Orkney Islands since 2011. The survey has been conducted early in the fishing season ... -
Exploitation of Antarctic krill Euphausia superba by three air-breathing predators with contrasting foraging strategies – implications for fisheries feedback management
Lowther, Andrew D.; Godø, Olav Rune; Kovacs, Kit; Krafft, Bjørn Arne; Lydersen, Christian; Staniland, Iain; Trathan, Phil; Watkins, Jon l (Conference object, 2016)SCAR Open Science Conference, Kuala Lumpur 2016 -
Feeding Hotspots and Distribution of Fin and Humpback Whales in the Norwegian Sea From 2013 to 2018.
Løviknes, Sunniva; Jensen, Knut Helge; Krafft, Bjørn Arne; Anthonypillai, Valentine; Nøttestad, Leif (Peer reviewed; Journal article, 2021)Fin whales (Balaenoptera physalus) and humpback whales (Megaptera novaeangliae) are commonly found in the Norwegian Sea during the summer months. Records from around 1995 to 2004 show that their distribution patterns were ... -
Identifying seasonal distribution patterns of fin whales across the Scotia Sea and the Antarctic Peninsula region using a novel approach combining habitat suitability models and ensemble learning methods
Viquerat, Sacha; Waluda, Claire M.; Kennedy, Amy S.; Jackson, Jennifer A.; Hevia, Marta; Carroll, Emma L.; Buss, Danielle L.; Burkhardt, Elke; Thain, Scott; Smith, Patrick; Secchi, Eduardo R.; Santora, Jarrod A.; Reiss, Christian; Lindstrøm, Ulf Ove; Krafft, Bjørn Arne; Gittins, George; Dalla Rosa, Luciano; Biuw, Martin; Herr, Helena (Peer reviewed; Journal article, 2022)Following their near extirpation by industrial whaling of the 20th century, the population status of Southern Hemisphere fin whales (SHFW) remains unknown. Systematic surveys estimating fin whale abundance in the Southern ... -
Instrumentation and handling effects on Antarctic fur seals (Arctocephalus gazella)
Blanchet, Marie Ann; Lydersen, Christian; Biuw, Erik Martin; Bruin, N; Hofmeyr, Greg; Krafft, Bjørn Arne; Kovacs, Kit M. (Journal article; Peer reviewed, 2014-02-21)The use of biologging instruments has greatly improved our understanding of the behaviour, physiology and ecology of free-ranging marine mammals. However, handling wild animals and attaching instruments to streamlined ... -
Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
Hill, Simeon; Atkinson, Angus; Darby, Chris; Fielding, Sophie; Krafft, Bjørn Arne; Godø, Olav Rune; Skaret, Georg; Trathan, Phil N.; Watkins, Jon L. (CCAMLR;WG-EMM-16/21, Conference object, 2016-06-15)This paper is a revised version of WG-EMM-15/28, which uses a question and answer format to explain the management of the Antarctic krill (Euphausia superba) fishery in the subareas 48.1 to 48.4, and current knowledge about ... -
Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
Hill, Simeon L; Atkinson, Angus; Darby, Chris; Fielding, Sofie; Krafft, Bjørn Arne; Godø, Olav Rune; Skaret, Georg; Trathan, Philip; Watkins, John (Peer reviewed; Journal article, 2016) -
KRILLBASE: A circumpolar database of Antarctic krill and salp numerical densities, 1926-2016
Atkinson, Angus; Hill, Simeon L; Pakhomov, Evgeny A; Siegel, Volker; Anadon, Ricardo; Chiba, Sanae; Daly, Kendra L.; Downie, Rod; Fielding, Sophie; Fretwell, Peter T.; Gerrish, Laura; Hosie, Graham W; Jessopp, Mark J; Kawaguchi, So; Krafft, Bjørn Arne; Loeb, Valerie; Nishikawa, Jun; Peat, Helen J; Reiss, Christian S; Ross, Robin M; Quetin, Langdon B; Schmidt, Katrin; Steinberg, Deborah K; Subramaniam, Roshni C; Tarling, Geraint A.; Ward, Peter (Peer reviewed; Journal article, 2017) -
KRILLBASE: a circumpolar database of Antarctic krill and salp numerical densities, 1926-2016
Atkinson, Angus; Hill, Simeon L; Pakhomov, Evgeny A; siegel, volker; Anadon, Ricardo; Chiba, Sanae; Daly, Kendra L; Downie, Rod; Fretwell, Peter T.; Gerrish, Laura; Hosie, Graham W; Jessopp, Mark J; kawaguchi, so; Krafft, Bjørn Arne; Loeb, Valerie; Nishikawa, Jun; Peat, Helen J; Reiss, Christian S; Ross, Robin M; Quetin, Langdon B; Schmidt, Katrin; Steinberg, Deborah K; Subramaniam, Roshni C; Tarling, Geraint A.; Ward, Peter (Peer reviewed; Journal article, 2016) -
Mapping of fish spawning in the North Sea — Report of the KINO-2 project for 2018
Mateos-Rivera, Alejandro; Mozfar, Bahar; Skern-Mauritzen, Rasmus; Dahle, Geir; Wehde, Henning; Kleppe, Lisbeth; Sundby, Svein; Thorsen, Anders; Seliussen, Bjørghild Breistein; Asplin, Lars; Aguirre, Gaston Ezequiel; Isari, Stamatina; Krafft, Bjørn Arne (Rapport fra havforskningen, Research report, 2019)Increased and updated knowledge of reproductive strategies of fish is crucial to optimize the temporal and spatial planning for conducting seismic surveys; in order to reduce its potential negative ecosystems impacts. The ... -
Mapping of Fish Spawning in the North Sea; Report of the “KINO-2” Project for 2019
Mateos-Rivera, Alejandro; Mozfar, Bahar; Skern, Rasmus; Dahle, Geir; Wehde, Henning; Kleppe, Lisbeth; Sundby, Svein; Thorsen, Anders; Asplin, Lars; Isari, Stamatina; Krafft, Bjørn Arne (Rapport fra havforskningen;2020 - 2, Research report, 2020)Increased and updated knowledge of reproductive strategies of fish is crucial to optimize the temporal and spatial planning for conducting seismic surveys; in order to reduce its potential negative ecosystems impacts. The ... -
Multinational large scale krill synoptic survey in CCAMLR Area 48 in 2019-survey plan and protocol for consideration by SG-ASAM 2018
Krafft, Bjørn Arne; Bergstad, Odd Aksel; Knutsen, Tor; Skaret, Georg; Macaulay, Gavin (CCAMLR;SG-ASAM-18/07, Research report, 2018)The objective for the Multinational Large-Scale Krill Synoptic Survey in CCAMLR area 48 3 in 2019 is to provide an updated estimate of the biomass of Antarctic krill (Euphausia 4 superba) used in models to estimate sustainable ... -
Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea)
Krag, Ludvig Ahm; Krafft, Bjørn Arne; Herrmann, Bent; Skov, Peter V. (Peer reviewed; Journal article, 2021)When caught in a trawl, some individuals interacting with the fishing gear may escape, but such interactions may lead to physiological trauma that causes direct delayed mortality and/or increased vulnerability to predation. ... -
Protocols for trawl sampling, recording of biological data, and hydrography for the 2019 international synoptic krill survey in Area 48
Knutsen, Tor; Krafft, Bjørn Arne; Renner, Angelika; Skaret, Georg; macaulay, gavin; Bergstad, Odd Aksel (CCAMLR;WG-EMM-18/23, Research report, 2018)Experience gained through participation in international programmes like BIOMASS and the CCAMLR 2000 Survey has demonstrated that standardization of equipment and methods is one of the most crucial steps for any successful ... -
Quantifying the escape mortality of trawl caught Antarctic krill (Euphausia superba)
Krafft, Bjørn Arne; Krag, Ludvig Ahm; Engås, Arill; Nordrum, Sigve; Bruheim, Inge; Herrmann, Bent (CCAMLR;WG-EMM-16/04, Conference object, 2016) -
Quantifying the Escape Mortality of Trawl Caught Antarctic Krill (Euphausia superba)
Krafft, Bjørn Arne; Krag, Ludvig Ahm; Engås, Arill; Nordrum, Sigve; Bruheim, Yngve; Herrmann, Bent (Journal article; Peer reviewed, 2016-09-13)Antarctic krill (Euphausia superba) is an abundant fishery resource, the harvest levels of which are expected to increase. However, many of the length classes of krill can escape through commonly used commercial trawl mesh ... -
Recent changes in distribution and relative abundance of cetaceans in the Norwegian Sea and their relationship with potential prey
Nøttestad, Leif; Krafft, Bjørn Arne; Anthonypillai, Valentine; Bernasconi, Matteo; Langård, Lise; Mørk, Herdis Langøy; Fernö, Anders (Journal article; Peer reviewed, 2015) -
Report from a krill focused survey with RV Kronprins Haakon and land-based predator work in Antarctica during 2018/2019
Krafft, Bjørn Arne; Bakkeplass, Kjell Gunnar; Berge, Terje; Biuw, Martin; Erices, Julio Alberto; Jones, Elizabeth Marie; Knutsen, Tor; Kubilius, Rokas; Kvalsund, Merete; Lindstrøm, Ulf; Macaulay, Gavin; Renner, Angelika; Rey, Alina; Søiland, Henrik; Wienerroither, Rupert; Ahonen, Heidi; Goto, Jade; Hoem, Nils; Huerta, Magdelena; Höfer, Juan; Iden, Oda; Jouanneau, William; Kruger, Lucas; Liholt, Håvard; Lowther, Andy; Makhado, Azwianewi B.; Mestre, Mireia; Narvestad, Audun; Oosthuisen, Chris; Rodrigues, Jose; Øyerhamn, Rune (Rapport fra havforskningen;2019 - 21, Research report, 2019)The primary objective for this krill research activity was twofold 1) to conduct a survey that provides updated estimates of the biomass and distribution of krill which are used in models to estimate sustainable yield in ...