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dc.contributor.authorEldøy, Sindre Håvarstein
dc.contributor.authorDavidsen, Jan Grimsrud
dc.contributor.authorThorstad, Eva Bonsak
dc.contributor.authorWhoriskey, Frederick G.
dc.contributor.authorAarestrup, Kim
dc.contributor.authorNæsje, Tor
dc.contributor.authorRønning, Lars
dc.contributor.authorSjursen, Aslak Darre
dc.contributor.authorRikardsen, Audun H.
dc.contributor.authorArnekleiv, Jo Vegar
dc.date.accessioned2018-09-11T12:53:09Z
dc.date.available2018-09-11T12:53:09Z
dc.date.issued2017-09-15
dc.description.abstractThe vertical behaviour of 44 veteran sea trout <i>Salmo trutta</i> (275–580 mm) in different marine fjord habitats (estuary, pelagic, near shore with and without steep cliffs) was documented during May–February by acoustic telemetry. The swimming depth of <i>S. trutta</i> was influenced by habitat, time of day (day v. night), season, seawater temperature and the body length at the time of tagging. Mean swimming depth during May–September was 1·7 m (individual means ranged from 0·4 to 6·4 m). Hence, <i>S. trutta</i> were generally surface oriented, but performed dives down to 24 m. Mean swimming depth in May–September was deeper in the near‐shore habitats with or without steep cliffs (2·0 m and 2·5 m, respectively) than in the pelagic areas (1·2 m). May–September mean swimming depth in all habitats was slightly deeper during day (1·9 m) than at night (1·2 m), confirming that <i>S. trutta</i> conducted small‐scale diel vertical movements. During summer, <i>S. trutta</i> residing in near‐shore habitat progressively moved deeper over the period May (mean 1·1 m) to August (mean 4·0 m) and then reoccupied shallower areas (mean 2·3 m) during September. In winter (November and February), individuals residing in the innermost part of the fjords were found at similar average depths as they occupied during the summer (mean 1·3 m). The swimming depths of <i>S. trutta</i> coincide with the previously known surface orientation of salmon lice <i>Lepeophtheirus salmonis</i>. Combined with previous studies on horizontal use of <i>S. trutta</i>, this study illustrates how <i>S. trutta</i> utilize marine water bodies commonly influenced by anthropogenic factors such as aquaculture, harbours and marine constructions, marine renewable energy production or other human activity. This suggests that the marine behaviour of <i>S. trutta</i> and its susceptibility to coastal anthropogenic factors should be considered in marine planning processes.en_US
dc.description.sponsorshipHemne Municipality County Governor of Sør‐Trøndelag Sør‐Trøndelag County Authority Norwegian Environment Agency Lake Rovatnet Landowners Association Trønder Energi AS Aqua Gen AS Dalhousie University (Ocean Tracking Network) Norwegian Institute for Nature Research DTU Aqua UiT The Arctic University of Norway NTNU University Museumen_US
dc.descriptionThis is the peer reviewed version of the following article: Eldøy, S.H., Davidsen, J.G., Thorstad, E.B., Whoriskey, F.G., Aarestrup, K., Næsje, T.F., ... Arnekleiv, J.V. (2017). Marine depth use of sea trout Salmo trutta in fjord areas of Central Norway. Journal of Fish Biology, 91, 1268-1283. https://doi.org/10.1111/jfb.13463, which has been published in final form at <a href=https://doi.org/10.1111/jfb.13463> https://doi.org/10.1111/jfb.13463</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.en_US
dc.identifier.citationEldøy, S.H., Davidsen, J.G., Thorstad, E.B., Whoriskey, F.G., Aarestrup, K., Næsje, T.F., ... Arnekleiv, J.V. (2017). Marine depth use of sea trout Salmo trutta in fjord areas of Central Norway. Journal of Fish Biology, 91, 1268-1283. https://doi.org/10.1111/jfb.13463en_US
dc.identifier.cristinIDFRIDAID 1487100
dc.identifier.doi10.1111/jfb.13463
dc.identifier.issn0022-1112
dc.identifier.issn1095-8649
dc.identifier.urihttps://hdl.handle.net/10037/13754
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Fish Biology
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/MILJØFORSK/255110/Norway/Consequences of land-use change and human activity on anadromous salmonids and the ecosystem services that they provide/CHASES/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectacoustic telemetryen_US
dc.subjectbrown trouten_US
dc.subjectmarine migrationen_US
dc.subjectmigratory behaviouren_US
dc.subjectswimming depthen_US
dc.titleMarine depth use of sea trout Salmo trutta in fjord areas of Central Norwayen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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