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Downstream migration and multiple dam passage by Atlantic salmon smolts
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).ORCID-id: 0000-0002-3098-0594
S.O. Conte Anadromous Fish Research Center USGS-Leetown Science Center.
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).ORCID-id: 0000-0002-3191-7140
U.S. Fish and Wildlife Service.
Visa övriga samt affilieringar
2017 (Engelska)Ingår i: North American Journal of Fisheries Management, ISSN 0275-5947, E-ISSN 1548-8675, Vol. 4, nr 37, s. 816-828Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The purpose of this study was to investigate behavior and survival of radio-tagged wild and hatchery-reared landlocked Atlantic Salmon Salmo salar smolts as they migrated past three hydropower dams equipped with fish bypass solutions in the Winooski River, Vermont. Among hatchery-reared smolts, those released early were more likely to initiate migration and did so after less delay than those released late. Once migration was initiated, however, the late-released hatchery smolts migrated at greater speeds. Throughout the river system, hatchery-reared fish performed similarly to wild fish. Dam passage rates varied between the three dams and was highest at the dam where unusually high spill levels occurred throughout the study period. Of the 50 fish that did migrate downstream, only 10% managed to reach the lake. Migration success was low despite the presence of bypass solutions, underscoring the need for evaluations of remedial measures; simply constructing a fishway is not synonymous with providing fish passage.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2017. Vol. 4, nr 37, s. 816-828
Nyckelord [en]
SALAR SMOLTS; CHINOOK SALMON; FISH PASSAGE; JUVENILE SALMONIDS; DELAYED MORTALITY; COLUMBIA RIVER; SNAKE RIVER; HYDROPOWER SYSTEM; TRUTTA SMOLTS; K+ ATPASE
Nationell ämneskategori
Ekologi
Forskningsämne
Biologi
Identifikatorer
URN: urn:nbn:se:kau:diva-46900DOI: 10.1080/02755947.2017.1327900ISI: 000407192600012OAI: oai:DiVA.org:kau-46900DiVA, id: diva2:1038775
Tillgänglig från: 2016-10-19 Skapad: 2016-10-19 Senast uppdaterad: 2018-09-10Bibliografiskt granskad
Ingår i avhandling
1. Atlantic salmon in regulated rivers: Migration, dam passage, and fish behavior
Öppna denna publikation i ny flik eller fönster >>Atlantic salmon in regulated rivers: Migration, dam passage, and fish behavior
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Karlstad: Karlstads universitet, 2016. s. 41
Serie
Karlstad University Studies, ISSN 1403-8099 ; 42
Nyckelord
fish migration; fish passage; downstream migration; kelt; smolt
Nationell ämneskategori
Biologiska vetenskaper
Forskningsämne
Biologi
Identifikatorer
urn:nbn:se:kau:diva-46903 (URN)978-91-7063-725-4 (ISBN)
Disputation
2016-12-09, Nyquistsalen 9C 203, Universitetsgatan 2, Karlstad, 10:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2016-11-15 Skapad: 2016-10-19 Senast uppdaterad: 2019-07-12Bibliografiskt granskad

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North American Journal of Fisheries Management
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Totalt: 194 träffar
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