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dc.contributor.authorHüppe, Lukas
dc.contributor.authorPayton, Laura
dc.contributor.authorLast, Kim
dc.contributor.authorWilcockson, David
dc.contributor.authorErshova, Elizaveta
dc.contributor.authorMeyer, Bettina
dc.date.accessioned2020-10-29T09:44:15Z
dc.date.available2020-10-29T09:44:15Z
dc.date.issued2020-07-15
dc.description.abstractThe circadian clock provides a mechanism for anticipating environmental cycles and is synchronized by temporal cues such as daily light/dark cycle or photoperiod. However, the Arctic environment is characterized by several months of Midnight Sun when the sun is continuously above the horizon and where sea ice further attenuates photoperiod. To test if the oscillations of circadian clock genes remain in synchrony with subtle environmental changes, we sampled the copepod <i>Calanus finmarchicus</i>, a key zooplankter in the north Atlantic, to determine <i>in situ</i> daily circadian clock gene expression near the summer solstice at a southern (74.5° N) sea ice-free and a northern (82.5° N) sea ice-covered station. Results revealed significant oscillation of genes at both stations, indicating the persistence of the clock at this time. While copepods from the southern station showed oscillations in the daily range, those from the northern station exhibited an increase in ultradian oscillations. We suggest that in <i>C. finmarchicus</i>, even small daily changes of solar altitude seem to be sufficient to entrain the circadian clock and propose that at very high latitudes, in under-ice ecosystems, tidal cues may be used as an additional entrainment cue.en_US
dc.identifier.citationHüppe, Payton, Last, Wilcockson, Ershova, Meyer. Evidence for oscillating circadian clock genes in the copepod Calanus finmarchicus during the summer solstice in the high Arctic. Biology Letters. 2020;16:20200257(7):1-5en_US
dc.identifier.cristinIDFRIDAID 1829417
dc.identifier.doi10.1098/rsbl.2020.0257
dc.identifier.issn1744-9561
dc.identifier.issn1744-957X
dc.identifier.urihttps://hdl.handle.net/10037/19706
dc.language.isoengen_US
dc.publisherThe Royal Societyen_US
dc.relation.journalBiology Letters
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleEvidence for oscillating circadian clock genes in the copepod Calanus finmarchicus during the summer solstice in the high Arcticen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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