dc.contributor.author | Lakka, Hanna-Kaisa | |
dc.contributor.author | Eloranta, Antti | |
dc.contributor.author | Hesthagen, Trygve H. | |
dc.contributor.author | Saksgård, Randi J. | |
dc.contributor.author | Power, Michael | |
dc.date.accessioned | 2021-02-19T11:56:06Z | |
dc.date.available | 2021-02-19T11:56:06Z | |
dc.date.created | 2021-02-01T11:42:13Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Aquatic Sciences. 2020, 82 (4), . | en_US |
dc.identifier.issn | 1015-1621 | |
dc.identifier.uri | https://hdl.handle.net/11250/2729210 | |
dc.description.abstract | Lepidurus arcticus (the Arctic tadpole shrimp) is a vulnerable keystone species in Arctic and alpine water bodies where its occurrence and population size may influence the viability and life history traits of resident salmonids. Using data from a Norwegian mountain hydropower reservoir, Aursjoen, we illustrate how reduced availability of L. arcticus as prey resulted in the reduced condition, growth and delayed maturation of resident brown trout (Salmo trutta). We further link changes in the relative abundance of L. arcticus as prey to changing reservoir conditions, e.g. water level changes in the spring period, thereby establishing an indirect link between reservoir operation regimes and brown trout population traits. While no evidence for decreased brown trout survival was found, the results indicate that alternative brown trout prey resources, i.e. the small chydorid cladoceran Eurycercus lamellatus, do not appear to have successfully offset the caloric loss from reduced consumption of large-sized L. arcticus. Although the fundamental explanation for the observed L. arcticus collapse remains largely unknown, the present findings provide strong evidence that this vulnerable crustacean species can affect the abundance, viability and life history traits of valued resident salmonid populations in oligotrophic alpine lakes and reservoirs exposed to climate- and hydropower-driven changes in water levels and temperature. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Springer | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Impacts of reduced Lepidurus arcticus availability on brown trout life history traits in a mountain reservoir | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.subject.nsi | VDP::Zoologiske og botaniske fag: 480 | en_US |
dc.subject.nsi | VDP::Zoology and botany: 480 | en_US |
dc.source.pagenumber | 11 | en_US |
dc.source.volume | 82 | en_US |
dc.source.journal | Aquatic Sciences | en_US |
dc.source.issue | 4 | en_US |
dc.identifier.doi | 10.1007/s00027-020-00751-x | |
dc.identifier.cristin | 1884914 | |
dc.relation.project | Norges forskningsråd: 228714 | en_US |
dc.relation.project | Andre: University of Jyväskylä | en_US |
dc.relation.project | Andre: Fylkesmannen i Oppland | en_US |
dc.description.localcode | This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |