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dc.contributor.authorEggers, Florianeng
dc.contributor.authorSlotte, Arileng
dc.contributor.authorLibungan, Lisa Anneeng
dc.contributor.authorJohannessen, Arneeng
dc.contributor.authorKvamme, Cecilieeng
dc.contributor.authorMoland, Eveneng
dc.contributor.authorOlsen, Esben Molandeng
dc.contributor.authorNash, Richard David Marriotteng
dc.date.accessioned2015-02-25T12:03:10Z
dc.date.available2015-02-25T12:03:10Z
dc.date.issued2014-11-05eng
dc.identifier.issn1932-6203en_US
dc.identifier.urihttps://hdl.handle.net/1956/9434
dc.description.abstractGillnet sampling and analyses of otolith shape, vertebral count and growth indicated the presence of three putative Atlantic herring (Clupea harengus L.) populations mixing together over the spawning season February–June inside and outside an inland brackish water lake (Landvikvannet) in southern Norway. Peak spawning of oceanic Norwegian spring spawners and coastal Skagerrak spring spawners occurred in March–April with small proportions of spawners entering the lake. In comparison, spawning of Landvik herring peaked in May–June with high proportions found inside the lake, which could be explained by local adaptations to the environmental conditions and seasonal changes of this marginal habitat. The 1.85 km2 lake was characterized by oxygen depletion occurring between 2.5 and 5 m depth between March and June. This was followed by changes in salinity from 1–7‰ in the 0–1 m surface layer to levels of 20–25‰ deeper than 10 m. In comparison, outside the 3 km long narrow channel connecting the lake with the neighboring fjord, no anoxic conditions were found. Here salinity in the surface layer increased over the season from 10 to 25‰, whereas deeper than 5 m it was stable at around 35‰. Temperature at 0–5 m depth increased significantly over the season in both habitats, from 7 to 14°C outside and 5 to 17°C inside the lake. Despite differences in peak spawning and utilization of the lake habitat between the three putative populations, there was an apparent temporal and spatial overlap in spawning stages suggesting potential interbreeding in accordance with the metapopulation concept.en_US
dc.language.isoengeng
dc.publisherPLoSen_US
dc.relation.ispartof<a href="http://hdl.handle.net/1956/17678" target="blank">Population structure and dynamics of Atlantic herring. A case study of herring inhabiting marginal habitats in Landvikvannet and its vicinity</a>en_US
dc.rightsAttribution CC BYeng
dc.rights.urihttp://creativecommons.org/licenses/by/4.0eng
dc.titleSeasonal dynamics of atlantic herring (Clupea harengus L.) populations spawning in the vicinity of marginal habitatsen_US
dc.typePeer reviewed
dc.typeJournal article
dc.date.updated2015-02-25T11:59:01Z
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2014 2014 Eggers et alen_US
dc.source.articlenumbere111985
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0111985
dc.identifier.cristin1178125
dc.source.journalPLoS ONE
dc.source.409
dc.source.1411


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