Change search
ReferencesLink to record
Permanent link

Direct link
Hydropower dam approach and passage by Atlantic salmon kelts
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences.ORCID iD: 0000-0002-3098-0594
Karlstad University, Faculty of Social and Life Sciences, Department of Biology.ORCID iD: 0000-0002-3191-7140
(English)Manuscript (preprint) (Other academic)
National Category
Natural Sciences
URN: urn:nbn:se:kau:diva-46902OAI: diva2:1038778
Available from: 2016-10-19 Created: 2016-10-19 Last updated: 2016-12-07
In thesis
1. Atlantic salmon in regulated rivers: Migration, dam passage, and fish behavior
Open this publication in new window or tab >>Atlantic salmon in regulated rivers: Migration, dam passage, and fish behavior
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Hydropower dams block migration routes and disrupt longitudinal connectivity in rivers, thereby posing a threat to migratory fish species. Various fish passage solutions have been implemented to improve connectivity with varying success. A well-functioning passage solution must ensure safe and timely passage routes that are used by a substantial portion of the migrating fish. In this thesis, I report the results from telemetry studies where the behavior and survival of migrating Atlantic salmon spawners, post-spawners and smolts have been evaluated in relation to hydropower dam passage. I evaluate downstream passage performance at dams with no passage solutions in the River Klarälven, and with simple passage solutions in in the Winooski River. In the River Ätran, I study both upstream- and downstream passage performance at a dam with sophisticated passage solutions based on the best available technology. In addition, I have studied the survival and behavior of post-spawners and hatchery-released smolts.

A substantial portion of the spawners survived spawning and initiated downstream migration. Most males migrated downstream in autumn following spawning, whereas females tended to stay in the river until spring. For hatchery-reared smolts, early release was associated with faster initiation of migration and higher survival compared to late release. Multiple dam passage resulted in high mortality for both smolts and kelts. For smolts, dam passage, even with simple passage solutions, was associated with substantial delay and mortality. High spill levels were linked to high survival and short delay for downstream migrating salmon. The best available passage solution, which consisted of a nature-like fishway and a low sloping intake rack to guide fish to a bypass, resulted in rapid passage of a large portion of the adult migrants.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2016. 41 p.
Karlstad University Studies, ISSN 1403-8099 ; 42
fish migration; fish passage; downstream migration; kelt; smolt
National Category
Biological Sciences
Research subject
urn:nbn:se:kau:diva-46903 (URN)978-91-7063-725-4 (ISBN)
Public defence
2016-12-09, Nyquistsalen 9C 203, Universitetsgatan 2, Karlstad, 10:15 (English)
Available from: 2016-11-15 Created: 2016-10-19 Last updated: 2016-12-15Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Nyqvist, DanielGreenberg, Larry
By organisation
Department of Environmental and Life SciencesDepartment of Biology
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

Total: 36 hits
ReferencesLink to record
Permanent link

Direct link