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dc.contributor.authorVollset, Knut Wiik
dc.contributor.authorFolkvord, Arild
dc.contributor.authorBrowman, Howard I.
dc.date.accessioned2011-06-23T09:34:14Z
dc.date.available2011-06-23T09:34:14Z
dc.date.issued2011-02-13
dc.identifier.issn0025-3162
dc.identifier.urihttp://hdl.handle.net/11250/108587
dc.description.abstractThe ability to forage at low light intensities can be of great importance for the survival of fish larvae in a pelagic environment. Three-dimensional silhouette imaging was used to observe larval cod foraging and swimming behaviour at three light intensities (dusk ~1.36 × 10ˉ³ W/m², night ~1.38 × 10ˉ4 W/m² and darkness ~3.67 × 10ˉ6 W/m²) at 4 different ages from 6 to 53 days post-hatch (dph). At 6 dph, active pursuit of prey was only observed under dusk conditions. Attacks, and frequent orientations, were observed from 26 dph under night conditions. This was consistent with swimming behaviour which suggested that turn angles were the same under dusk and night conditions, but lower in darkness. Cod at 53 dph attacked prey in darkness and turn angles were not different from those under other light conditions. This suggests that larvae are still able to feed at light intensities of 3.67 × 10ˉ6 W/m². We conclude that larval cod can maintain foraging behaviour under light intensities that correspond to night-time at depths at which they are observed in the field, at least if they encounter high-density patches of prey such as those that they would encounter at thin layers or fronts.en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.subjectcod larvaeen_US
dc.subjecttorskelarveren_US
dc.subjectfish behaviouren_US
dc.subjectfiskeatferden_US
dc.titleForaging behaviour of larval cod (Gadus morhua) at low light intensitiesen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485en_US
dc.source.pagenumber1125-1133en_US
dc.source.volume158
dc.source.journalMarine Biology
dc.source.issue5
dc.identifier.doihttp://dx.doi.org/10.1007/s00227-011-1635-5


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