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Wood addition in the hatchery and river environments affectspost-releaseperformance of overwintering brown trout
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013). Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan. (Naturresurs rinnande vatten)ORCID iD: 0000-0002-4417-6636
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013). (Naturresurs rinnande vatten)ORCID iD: 0000-0002-8738-8815
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013). (Naturresurs rinnande vatten)
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013). (Naturresurs rinnande vatten)
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2018 (English)In: Freshwater Biology, ISSN 0046-5070, E-ISSN 1365-2427, Vol. 64, no 1, p. 71-80Article in journal (Refereed) Published
Abstract [en]

1. Habitat structural complexity affects the behaviour and physiology of individuals,and responses to the environment can be immediate or influence performancelater in life through delayed effects.

2. Here, we investigated how structural enrichment, both pre-release in the hatcheryrearing environment and post-release in the wild, influenced winter growthand site fidelity of brown trout stocked into side channels of a regulated river.

3. Experiencing structural enrichment in the rearing environment during 3 months inautumn had no pre-release effect on growth, but a delayed positive effect afterrelease during the subsequent winter. Moreover, trout recaptured in wood-treatedsections of the side channels had grown more than trout recaptured in controlsections. Wood enrichment in the side channels also increased overwinter sitefidelity.

4. These results show that adding structure during a relatively short period may altergrowth trajectories, and adding wood to side channels is a cost-effective methodto enhance winter habitat carrying capacity for juvenile salmonids in regulatedrivers.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018. Vol. 64, no 1, p. 71-80
Keywords [en]
growth, habitat complexity, restoration, site fidelity, stream wood
National Category
Ecology
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-69976DOI: 10.1111/fwb.13195ISI: 000453853500006OAI: oai:DiVA.org:kau-69976DiVA, id: diva2:1259254
Funder
Knowledge Foundation, ProSpekt 15-20160021Available from: 2018-10-29 Created: 2018-10-29 Last updated: 2019-03-07Bibliographically approved

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Watz, JohanCalles, OlleCarlsson, NiclasNilsson, Per AndersNyqvist, Daniel

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