Blar i Brage IMR på forfatter "Krag, Ludvig Ahm"
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Antarctic krill (Euphausia superba) exhibit positive phototaxis to white LED light
Krafft, Bjørn Arne; Krag, Ludvig Ahm (Peer reviewed; Journal article, 2021)The use of light-emitting diodes (LEDs) is increasingly used in fishing gears and its application is known to trigger negative or positive phototaxis (i.e., swimming away or toward the light source, respectively) for some ... -
Antarctic krill and ecosystem monitoring survey at South Orkney Islands in 2016
Krafft, Bjørn Arne; Skaret, Georg; Krag, Ludvig Ahm; Rustand, Torborg; Pedersen, Ronald (Rapport fra havforskningen;20-2016, Research report, 2016)Small scaled Russian exploratory fishing for krill in the Southern Ocean began in the late 1960s. During the 1970s the fisheries increased and annual catches of krill have exhibited a number of fluctuations since the ... -
Antarctic krill and ecosystem monitoring survey off the South Orkney Islands in 2018
Krafft, Bjørn Arne; Skaret, Georg; Krag, Ludvig Ahm; Pedersen, Ronald (Rapport fra havforskningen;16-2018, Research report, 2018)Environmental monitoring along set transect lines off South Orkney Islands, Southern Ocean. Executed annual surveys (since 2011) to collect acoustic and biological data on krill, other macro zooplankton and data on krill ... -
Antarctic krill and ecosystem monitoring survey off the South Orkney islands in 2018
Krafft, Bjørn Arne; Skaret, Georg; Krag, Ludvig Ahm; Pedersen, Ronald (CCAMLR;WG-EMM-18/P03, Research report, 2018) -
Assessment of mortality of Antarctic krill (Euphausia superba) escaping from a trawl
Krafft, Bjørn Arne; Krag, Ludvig Ahm (Conference object, 2016) -
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig
Krag, Ludvig Ahm; Krafft, Bjørn Arne; Engås, Arill; Herrmann, Bent (Peer reviewed; Journal article, 2018)For the development of efficient trawls to minimize catch loss, escape mortality and potential negative ecosystem impacts from the fishery, the understanding about trawl selectivity processes are crucial. Small crustaceans ... -
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) -
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. ... -
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 ... -
Size selection of Antarctic krill (Euphausia superba) in a commersial codend and trawl body
Herrmann, Bent; Krag, Ludvig Ahm; Krafft, Bjørn Arne (Journal article; Peer reviewed, 2018)During fishing, many fish species are able to avoid the net walls of the trawl body and so the majority of size selection occurs in the codend of the net. Antarctic krill (Euphausia superba) are regarded as true planktonic ... -
South Orkney Island 2016 Antarctic krill and ecosystem monitoring
Krafft, Bjørn Arne; Skaret, Georg; Krag, Ludvig Ahm; Rustand, Torborg; Pedersen, Ronald (CCAMLR;WG-EMM-16/P03, Conference object, 2016) -
Summer distribution and demography of Antarctic krill Euphausia superba Dana, 1852 (Euphausiacea) at the South Orkney Islands, 2011–2015
Krafft, Bjørn Arne; Knutson, T; Krag, Ludvig Ahm; Jensen, Knut Helge; Skaret, Georg; Krakstad, Jens-Otto; Larsen, Stuart; Melle, Webjørn Raunsgård; Iversen, Svein Arnholt; Godø, Olav Rune (Journal article; Peer reviewed, 2018)We carried out a survey of Antarctic krill (Euphausia superbaDana, 1850) from 2011 to 2015 to establish a long-term, time-series dataset of distribution, abundance, and demography for this species in the South Orkney Islands ...