Show simple item record

dc.contributor.authorKlemetsen, Anders
dc.contributor.authorAase, Berit Margrethe
dc.contributor.authorAmundsen, Per-Arne
dc.date.accessioned2021-01-25T14:13:41Z
dc.date.available2021-01-25T14:13:41Z
dc.date.issued2020-07-22
dc.description.abstractLittoral chydorids were sampled with a bottom sledge in Takvatn, a 15 km2 north Norwegian oligotrophic lake with poor vegetation. Three out of eight recorded species of chydorids were common, with abundance minima in late summer and maxima in autumn. Eurycercus lamellatus (O.F. Müller, 1776) and Acroperus harpae (Baird, 1835) were monocyclic, whereas Chydorus sphaericus (O.F. Müller, 1776) was seemingly acyclic. Females of E. lamellatus appeared in early June and grew to maximum sizes of 2–2.5 mm in early August. Parthenogenesis started in late July and two summer generations could be distinguished by size distributions. Gamogenesis took place in September. Acroperus harpae females appeared in early June and grew to maximum sizes of around 0.7 mm in early August. Parthenogenesis started in early July and gamogenesis took place in September and October. Parthenogenetic females of C. sphaericus appeared already at ice-break and had constant sizes of around 0.4 mm through the entire season. Males or ephippial females were not observed. The acyclic life history may be an adaptation to the challenging environment of this subarctic lake. Summer generations could not be distinguished in the two small-sized species, but both populations reached high abundances in autumn. The abundance of E. lamellatus increased from August, but then decreased, possibly as a result of fish predation. We argue that the present results are typical for large oligotrophic lakes in subarctic Europe.en_US
dc.identifier.citationKlemetsen A, Aase BM, Amundsen P-A. Diversity, abundance, and life histories of littoral chydorids (Cladocera: Chydoridae) in a subarctic European lake. Journal of Crustacean Biology. 2020;40(5):534-543en_US
dc.identifier.cristinIDFRIDAID 1868525
dc.identifier.doi10.1093/jcbiol/ruaa048
dc.identifier.issn0278-0372
dc.identifier.issn1937-240X
dc.identifier.urihttps://hdl.handle.net/10037/20480
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.relation.journalJournal of Crustacean Biology
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.titleDiversity, abundance, and life histories of littoral chydorids (Cladocera: Chydoridae) in a subarctic European lakeen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record