Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater
Groundwater may create refuges for Atlantic salmon egg survival during low flows in regulated rivers and thus play an important role for survival during winter. To investigate the links between the survival of salmon embryos and hyporheic hydrological processes during permanent winter drawdown, a 10...
Published in: | Hydrobiologia |
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Online Access: | http://hdl.handle.net/11250/2480294 https://doi.org/10.1007/s10750-014-2043-x |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2480294 2023-05-15T15:30:47+02:00 Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater Casas-Mulet, Roser Alfredsen, Knut Brabrand, Åge Saltveit, Svein Jakob 2015 http://hdl.handle.net/11250/2480294 https://doi.org/10.1007/s10750-014-2043-x eng eng Springer Verlag Norges forskningsråd: 193818 Hydrobiologia. 2015, 743 (1), 269-284. urn:issn:0018-8158 http://hdl.handle.net/11250/2480294 https://doi.org/10.1007/s10750-014-2043-x cristin:1159569 269-284 743 Hydrobiologia 1 Journal article Peer reviewed 2015 ftntnutrondheimi https://doi.org/10.1007/s10750-014-2043-x 2019-09-17T06:53:33Z Groundwater may create refuges for Atlantic salmon egg survival during low flows in regulated rivers and thus play an important role for survival during winter. To investigate the links between the survival of salmon embryos and hyporheic hydrological processes during permanent winter drawdown, a 100-m-long and 50-m-wide gravel area in a regulated river, the River Suldalslågen, was used for an experimental study. Surface and subsurface water levels were monitored with 2-min time resolution by means of water pressure sensors placed in pipes. Temperature, conductivity and dissolved oxygen were also measured. Eight cylindrical boxes, each with two compartments (at 10- and 30-cm depth, respectively) containing 50 Atlantic salmon eggs, were placed in the river bed substrate of both the drawdown zone and the permanently wetted area as a reference. They were regularly checked for survival during winter from January to May, coinciding with egg development period for this river. Survival rates in boxes in the dewatered river bed were between 8 and 78% during winter, compared to 80 to 99% in the reference wetted area. The main driver for egg survival in the dewatered area was groundwater with sufficient oxygen levels. acceptedVersion This is a post-peer-review, pre-copyedit version of an article published in [Hydrobiologia]. The final authenticated version is available online at: https://link.springer.com/article/10.1007%2Fs10750-014-2043-x Article in Journal/Newspaper Atlantic salmon Salmo salar NTNU Open Archive (Norwegian University of Science and Technology) Hydrobiologia 743 1 269 284 |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Groundwater may create refuges for Atlantic salmon egg survival during low flows in regulated rivers and thus play an important role for survival during winter. To investigate the links between the survival of salmon embryos and hyporheic hydrological processes during permanent winter drawdown, a 100-m-long and 50-m-wide gravel area in a regulated river, the River Suldalslågen, was used for an experimental study. Surface and subsurface water levels were monitored with 2-min time resolution by means of water pressure sensors placed in pipes. Temperature, conductivity and dissolved oxygen were also measured. Eight cylindrical boxes, each with two compartments (at 10- and 30-cm depth, respectively) containing 50 Atlantic salmon eggs, were placed in the river bed substrate of both the drawdown zone and the permanently wetted area as a reference. They were regularly checked for survival during winter from January to May, coinciding with egg development period for this river. Survival rates in boxes in the dewatered river bed were between 8 and 78% during winter, compared to 80 to 99% in the reference wetted area. The main driver for egg survival in the dewatered area was groundwater with sufficient oxygen levels. acceptedVersion This is a post-peer-review, pre-copyedit version of an article published in [Hydrobiologia]. The final authenticated version is available online at: https://link.springer.com/article/10.1007%2Fs10750-014-2043-x |
format |
Article in Journal/Newspaper |
author |
Casas-Mulet, Roser Alfredsen, Knut Brabrand, Åge Saltveit, Svein Jakob |
spellingShingle |
Casas-Mulet, Roser Alfredsen, Knut Brabrand, Åge Saltveit, Svein Jakob Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
author_facet |
Casas-Mulet, Roser Alfredsen, Knut Brabrand, Åge Saltveit, Svein Jakob |
author_sort |
Casas-Mulet, Roser |
title |
Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
title_short |
Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
title_full |
Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
title_fullStr |
Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
title_full_unstemmed |
Survival of eggs of Atlantic salmon (Salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
title_sort |
survival of eggs of atlantic salmon (salmo salar) in a drawdown zone of a regulated river influenced by groundwater |
publisher |
Springer Verlag |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/2480294 https://doi.org/10.1007/s10750-014-2043-x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
269-284 743 Hydrobiologia 1 |
op_relation |
Norges forskningsråd: 193818 Hydrobiologia. 2015, 743 (1), 269-284. urn:issn:0018-8158 http://hdl.handle.net/11250/2480294 https://doi.org/10.1007/s10750-014-2043-x cristin:1159569 |
op_doi |
https://doi.org/10.1007/s10750-014-2043-x |
container_title |
Hydrobiologia |
container_volume |
743 |
container_issue |
1 |
container_start_page |
269 |
op_container_end_page |
284 |
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1766361229175029760 |