Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning?
Abstract: Repeat salmonid spawners may make large contributions to total recruitment and long term population stability. Despite their potential importance, relatively little is known about this phase of the life history for anadromous populations and nothing has been reported for landlocked populat...
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ftunivmassamh:oai:scholarworks.umass.edu:fishpassage_conference-1962 2023-05-15T15:31:34+02:00 Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? Nyqvist, Daniel Calles, Olle Bergman, Eva Hagelin, Anna Greenberg, Larry 2015-06-25T00:00:00Z https://scholarworks.umass.edu/fishpassage_conference/2015/June24/34 unknown ScholarWorks@UMass Amherst https://scholarworks.umass.edu/fishpassage_conference/2015/June24/34 International Conference on Engineering and Ecohydrology for Fish Passage Aquaculture and Fisheries Hydraulic Engineering text 2015 ftunivmassamh 2022-01-09T19:28:37Z Abstract: Repeat salmonid spawners may make large contributions to total recruitment and long term population stability. Despite their potential importance, relatively little is known about this phase of the life history for anadromous populations and nothing has been reported for landlocked populations. Here, we studied post-spawning behavior and survival of landlocked Atlantic salmon in relation to downstream dam passage in the River Klarälven, Sweden. Eight hydropower stations separate the feeding grounds in Lake Vänern from the spawning grounds in the River Klarälven, and no measures to facilitate downstream migration are present in the river. Forty-nine percent of the salmon survived spawning and initiated downstream migration. Females and small fish had higher post-spawning survival than males and large fish. The post-spawners migrated downstream in autumn and spring and remained relatively inactive in the river during winter. Downstream migration speed in the free flowing part of the river was highly variable but averaged 9.30 km/day. Most fish passed the first hydropower station via upwardopening spill gates after a median residence time in the forebay of 25 min. However, no tagged fish survived passage of all eight hydropower stations to reach Lake Vänern. This result underscores the need for remedial measures to increase the survival of downstream migrating kelts. Text Atlantic salmon Salmo salar University of Massachusetts: ScholarWorks@UMass Amherst |
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University of Massachusetts: ScholarWorks@UMass Amherst |
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Aquaculture and Fisheries Hydraulic Engineering |
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Aquaculture and Fisheries Hydraulic Engineering Nyqvist, Daniel Calles, Olle Bergman, Eva Hagelin, Anna Greenberg, Larry Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? |
topic_facet |
Aquaculture and Fisheries Hydraulic Engineering |
description |
Abstract: Repeat salmonid spawners may make large contributions to total recruitment and long term population stability. Despite their potential importance, relatively little is known about this phase of the life history for anadromous populations and nothing has been reported for landlocked populations. Here, we studied post-spawning behavior and survival of landlocked Atlantic salmon in relation to downstream dam passage in the River Klarälven, Sweden. Eight hydropower stations separate the feeding grounds in Lake Vänern from the spawning grounds in the River Klarälven, and no measures to facilitate downstream migration are present in the river. Forty-nine percent of the salmon survived spawning and initiated downstream migration. Females and small fish had higher post-spawning survival than males and large fish. The post-spawners migrated downstream in autumn and spring and remained relatively inactive in the river during winter. Downstream migration speed in the free flowing part of the river was highly variable but averaged 9.30 km/day. Most fish passed the first hydropower station via upwardopening spill gates after a median residence time in the forebay of 25 min. However, no tagged fish survived passage of all eight hydropower stations to reach Lake Vänern. This result underscores the need for remedial measures to increase the survival of downstream migrating kelts. |
format |
Text |
author |
Nyqvist, Daniel Calles, Olle Bergman, Eva Hagelin, Anna Greenberg, Larry |
author_facet |
Nyqvist, Daniel Calles, Olle Bergman, Eva Hagelin, Anna Greenberg, Larry |
author_sort |
Nyqvist, Daniel |
title |
Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? |
title_short |
Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? |
title_full |
Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? |
title_fullStr |
Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? |
title_full_unstemmed |
Session C9: Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo Salar) in a Regulated River: Is There Potential for Repeat Spawning? |
title_sort |
session c9: post-spawning survival and downstream passage of landlocked atlantic salmon (salmo salar) in a regulated river: is there potential for repeat spawning? |
publisher |
ScholarWorks@UMass Amherst |
publishDate |
2015 |
url |
https://scholarworks.umass.edu/fishpassage_conference/2015/June24/34 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
International Conference on Engineering and Ecohydrology for Fish Passage |
op_relation |
https://scholarworks.umass.edu/fishpassage_conference/2015/June24/34 |
_version_ |
1766362081858158592 |