Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris?
Abstract This study investigates the effect of large woody debris (LWD) on the abundance of juvenile Atlantic salmon ( Salmo salar , L.) and anadromous brown trout ( Salmo trutta , L.) in semi‐alluvial side channels of the river Aurlandselva (Norway) using point electrofishing and microhabitat mappi...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | http://dx.doi.org/10.1002/rra.4263 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.4263 |
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crwiley:10.1002/rra.4263 2024-06-02T08:03:39+00:00 Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? Bretzel, Joachim B. Pulg, Ulrich Geist, Juergen 2024 http://dx.doi.org/10.1002/rra.4263 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.4263 en eng Wiley http://creativecommons.org/licenses/by/4.0/ River Research and Applications ISSN 1535-1459 1535-1467 journal-article 2024 crwiley https://doi.org/10.1002/rra.4263 2024-05-03T10:41:43Z Abstract This study investigates the effect of large woody debris (LWD) on the abundance of juvenile Atlantic salmon ( Salmo salar , L.) and anadromous brown trout ( Salmo trutta , L.) in semi‐alluvial side channels of the river Aurlandselva (Norway) using point electrofishing and microhabitat mapping. Not the presence of LWD, but stream bed shelter availability and the distance to spawning grounds affected the fish abundance (fish/point), independent of other habitat components. LWD showed only an effect on fish abundance when in interaction with other habitat components. This discrepancy can be explained by the availability of cavities in the shelter‐rich coarse substrate which provide sufficient cover and territory for juvenile fish at the given carrying capacity of river Aurlandselva. Whilst LWD may be most effective to provide shelter in lowland streams (bed slope <0.005), maintaining or restoring shelter‐rich coarse substrates should be considered a key priority in steeper salmonid rivers and associated semi‐fluvial streams. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Fish Point ENVELOPE(-56.465,-56.465,49.900,49.900) Norway River Research and Applications |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract This study investigates the effect of large woody debris (LWD) on the abundance of juvenile Atlantic salmon ( Salmo salar , L.) and anadromous brown trout ( Salmo trutta , L.) in semi‐alluvial side channels of the river Aurlandselva (Norway) using point electrofishing and microhabitat mapping. Not the presence of LWD, but stream bed shelter availability and the distance to spawning grounds affected the fish abundance (fish/point), independent of other habitat components. LWD showed only an effect on fish abundance when in interaction with other habitat components. This discrepancy can be explained by the availability of cavities in the shelter‐rich coarse substrate which provide sufficient cover and territory for juvenile fish at the given carrying capacity of river Aurlandselva. Whilst LWD may be most effective to provide shelter in lowland streams (bed slope <0.005), maintaining or restoring shelter‐rich coarse substrates should be considered a key priority in steeper salmonid rivers and associated semi‐fluvial streams. |
format |
Article in Journal/Newspaper |
author |
Bretzel, Joachim B. Pulg, Ulrich Geist, Juergen |
spellingShingle |
Bretzel, Joachim B. Pulg, Ulrich Geist, Juergen Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? |
author_facet |
Bretzel, Joachim B. Pulg, Ulrich Geist, Juergen |
author_sort |
Bretzel, Joachim B. |
title |
Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? |
title_short |
Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? |
title_full |
Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? |
title_fullStr |
Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? |
title_full_unstemmed |
Juvenile salmonid abundance in a diamictic semi‐fluvial stream in Norway—does stream bed shelter beat large woody debris? |
title_sort |
juvenile salmonid abundance in a diamictic semi‐fluvial stream in norway—does stream bed shelter beat large woody debris? |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/rra.4263 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.4263 |
long_lat |
ENVELOPE(-56.465,-56.465,49.900,49.900) |
geographic |
Fish Point Norway |
geographic_facet |
Fish Point Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
River Research and Applications ISSN 1535-1459 1535-1467 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/rra.4263 |
container_title |
River Research and Applications |
_version_ |
1800748245050195968 |