Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety?
Loss of connectivity in riverine systems due to construction of hydropower dams has resulted in a worldwide decline of anadromous salmonid species such as Atlantic salmon (Salmo salar L.) and sea trout (Salmo trutta L.). The future of these species depend on the presence of available spawning habita...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2020
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ftumeauniv:oai:DiVA.org:umu-174689 2023-10-09T21:49:56+02:00 Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? Kan en bubbelbarriär avleda nedvandrandesalmonidkelt till säkerhet? Nordin, Jonathan 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-174689 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-174689 info:eu-repo/semantics/openAccess bubble barrier non-physical barrier fish passage fish migration hydropower bubbelbarriär icke-fysisk fiskledare lax öring fiskvandring vattenkraft Ecology Ekologi Student thesis info:eu-repo/semantics/bachelorThesis text 2020 ftumeauniv 2023-09-22T13:53:06Z Loss of connectivity in riverine systems due to construction of hydropower dams has resulted in a worldwide decline of anadromous salmonid species such as Atlantic salmon (Salmo salar L.) and sea trout (Salmo trutta L.). The future of these species depend on the presence of available spawning habitat in freshwater river systems. Modern research and mitigation efforts mainly focus on ensuring a successful upstream passage past dams e.g. fish ladders. Atlantic salmon and sea trout are iteroparous, and are thus able to spawn repeatedly during their lifetime. Individuals surviving upstream migration and spawning generally face a hazardous journey back to their marine feeding grounds. In this large scale natural field study I evaluate the possibility of using a bubble barrier as a non-physical structure to guide downstream migrating kelt past the turbines at a large hydropower station in northern Sweden. Results from this study clearly show that kelt effectively can be diverted using a bubble barrier in daylight conditions with a mean water velocity of 1.1 m s-1 (p=0,01). From a fishway managers perspective, increasing survival of salmonid kelt is a substantial step towards achieving a viable population with increased numbers of repeat spawners and large individuals. This study presents new results in a sparsely explored subject; the diversion of post-spawn salmonid migrants using non-physical barriers. Bachelor Thesis Atlantic salmon Northern Sweden Salmo salar Umeå University: Publications (DiVA) |
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Open Polar |
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Umeå University: Publications (DiVA) |
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ftumeauniv |
language |
English |
topic |
bubble barrier non-physical barrier fish passage fish migration hydropower bubbelbarriär icke-fysisk fiskledare lax öring fiskvandring vattenkraft Ecology Ekologi |
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bubble barrier non-physical barrier fish passage fish migration hydropower bubbelbarriär icke-fysisk fiskledare lax öring fiskvandring vattenkraft Ecology Ekologi Nordin, Jonathan Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? |
topic_facet |
bubble barrier non-physical barrier fish passage fish migration hydropower bubbelbarriär icke-fysisk fiskledare lax öring fiskvandring vattenkraft Ecology Ekologi |
description |
Loss of connectivity in riverine systems due to construction of hydropower dams has resulted in a worldwide decline of anadromous salmonid species such as Atlantic salmon (Salmo salar L.) and sea trout (Salmo trutta L.). The future of these species depend on the presence of available spawning habitat in freshwater river systems. Modern research and mitigation efforts mainly focus on ensuring a successful upstream passage past dams e.g. fish ladders. Atlantic salmon and sea trout are iteroparous, and are thus able to spawn repeatedly during their lifetime. Individuals surviving upstream migration and spawning generally face a hazardous journey back to their marine feeding grounds. In this large scale natural field study I evaluate the possibility of using a bubble barrier as a non-physical structure to guide downstream migrating kelt past the turbines at a large hydropower station in northern Sweden. Results from this study clearly show that kelt effectively can be diverted using a bubble barrier in daylight conditions with a mean water velocity of 1.1 m s-1 (p=0,01). From a fishway managers perspective, increasing survival of salmonid kelt is a substantial step towards achieving a viable population with increased numbers of repeat spawners and large individuals. This study presents new results in a sparsely explored subject; the diversion of post-spawn salmonid migrants using non-physical barriers. |
format |
Bachelor Thesis |
author |
Nordin, Jonathan |
author_facet |
Nordin, Jonathan |
author_sort |
Nordin, Jonathan |
title |
Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? |
title_short |
Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? |
title_full |
Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? |
title_fullStr |
Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? |
title_full_unstemmed |
Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety? |
title_sort |
highway to hell: can a bubble barrier guide descending salmonid kelt to safety? |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-174689 |
genre |
Atlantic salmon Northern Sweden Salmo salar |
genre_facet |
Atlantic salmon Northern Sweden Salmo salar |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-174689 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1779312993287274496 |