Blar i Brage IMR på forfatter "Røstad, Anders"
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Behavior of individual mesopelagic fish in acoustic scattering layers of Norwegian fjords
Kaartvedt, Stein; Torgersen, Thomas; Klevjer, Thor A.; Røstad, Anders; Devine, Jennifer A. (Journal article; Peer reviewed, 2008-05-22)Mesopelagic acoustic scattering layers (SLs) in 2 fjords were studied from a stationary research vessel. Diel vertical movements of SLs were assessed by hull-mounted transducers, while in situ behavior of individuals ... -
Diel vertical migration and individual behavior of nekton beyond the ocean's twilight zone
Kaartvedt, Stein; Røstad, Anders; Christiansen, Svenja; Klevjer, Thor Aleksander (Peer reviewed; Journal article, 2020)Diel vertical migration (DVM) is normally limited to the upper 1000 m. However, the use of ship-borne and stationary submerged echosounders in the Red Sea unveiled consistent formation of daytime patches extending to ... -
Flexible behaviour in a mesopelagic fish (Maurolicus muelleri)
Klevjer, Thor Aleksander; Røstad, Anders; Aksnes, Dag Lorents; Kaartvedt, Stein (Peer reviewed; Journal article, 2021)Variability of mesopelagic scattering layers is often attributed to environmental conditions or multi-species layer composition. Yet, little is known about variation in behaviour among the individuals forming scattering ... -
Flexible behaviour in a mesopelagic fish (Maurolicus muelleri)
Christiansen, Svenja; Klevjer, Thor Aleksander; Røstad, Anders; Aksnes, Dag Lorents; Kaartvedt, Stein (Peer reviewed; Journal article, 2021)Variability of mesopelagic scattering layers is often attributed to environmental conditions or multi-species layer composition. Yet, little is known about variation in behaviour among the individuals forming scattering ... -
Large scale patterns in vertical distribution and behaviour of mesopelagic scattering layers
Klevjer, Thor A.; Irigoien, Xabier; Røstad, Anders; Fraile-Nuez, Eugenio; Benítez-Barrios, Verónica María; Kaartvedt, Stein (Journal article; Peer reviewed, 2016-01-27)Recent studies suggest that previous estimates of mesopelagic biomasses are severely biased, with the new, higher estimates underlining the need to unveil behaviourally mediated coupling between shallow and deep ocean ... -
Piscivorous fish patrol krill swarms
Kaartvedt, Stein; Røstad, Anders; Fiksen, Øyvind; Melle, Webjørn; Torgersen, Thomas; Breien, M. T.; Klevjer, Thor A. (Journal article; Peer reviewed, 2005-09-01)Dense swarms of the krill Meganyctiphanes norvegica in the Norwegian Sea were patrolled by large, piscivorous fish, which apparently use the krill swarms as feeding grounds in their hunt for planktivores. For the krill, ...