Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka )
A major introduced run of sockeye salmon (Oncorhynchus nerka) at Frazer Lake, Kodiak Island, Alaska, is perpetuated by an Alaska steeppass fishway at a 10-m-high falls on the outlet river. Experimental modifications of the fishway, which was inadequate by 1970 as the salmon run increased, improved s...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/f87-008 http://www.nrcresearchpress.com/doi/pdf/10.1139/f87-008 |
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crcansciencepubl:10.1139/f87-008 2023-12-17T10:32:58+01:00 Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) Blackett, Roger F. 1987 http://dx.doi.org/10.1139/f87-008 http://www.nrcresearchpress.com/doi/pdf/10.1139/f87-008 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 44, issue 1, page 66-76 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/f87-008 2023-11-19T13:38:20Z A major introduced run of sockeye salmon (Oncorhynchus nerka) at Frazer Lake, Kodiak Island, Alaska, is perpetuated by an Alaska steeppass fishway at a 10-m-high falls on the outlet river. Experimental modifications of the fishway, which was inadequate by 1970 as the salmon run increased, improved salmon entry and passage. Sockeye passage over 4 yr was nearly equivalent in a steeppass of 60 m continuous length (22% slope) and an adjoining steeppass with three resting pools, but significant year-to-year differences in passage occurred between steeppasses. Resting tanks were beneficial for holding slower or descending salmon without blocking passage of other salmon. An average entry of 142 sockeye in 15 min was achieved by guiding all salmon along a weir to an entrance tank with a vertical slot orifice. Chutes installed in the entry end of the steeppasses created a high-velocity stream for attraction and decreased salmon dropout from the entrance tank. Salmon passage in the original steeppasses with three resting pools was greater than in new (1979) steeppasses with a single resting pool. In 1985, sockeye passage of 2925/h and 46 806/d exceeded fishway capacity requirements. Article in Journal/Newspaper Kodiak Alaska Canadian Science Publishing (via Crossref) Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Weir ENVELOPE(177.167,177.167,-84.983,-84.983) High Falls ENVELOPE(-57.765,-57.765,49.525,49.525) Canadian Journal of Fisheries and Aquatic Sciences 44 1 66 76 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Blackett, Roger F. Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
A major introduced run of sockeye salmon (Oncorhynchus nerka) at Frazer Lake, Kodiak Island, Alaska, is perpetuated by an Alaska steeppass fishway at a 10-m-high falls on the outlet river. Experimental modifications of the fishway, which was inadequate by 1970 as the salmon run increased, improved salmon entry and passage. Sockeye passage over 4 yr was nearly equivalent in a steeppass of 60 m continuous length (22% slope) and an adjoining steeppass with three resting pools, but significant year-to-year differences in passage occurred between steeppasses. Resting tanks were beneficial for holding slower or descending salmon without blocking passage of other salmon. An average entry of 142 sockeye in 15 min was achieved by guiding all salmon along a weir to an entrance tank with a vertical slot orifice. Chutes installed in the entry end of the steeppasses created a high-velocity stream for attraction and decreased salmon dropout from the entrance tank. Salmon passage in the original steeppasses with three resting pools was greater than in new (1979) steeppasses with a single resting pool. In 1985, sockeye passage of 2925/h and 46 806/d exceeded fishway capacity requirements. |
format |
Article in Journal/Newspaper |
author |
Blackett, Roger F. |
author_facet |
Blackett, Roger F. |
author_sort |
Blackett, Roger F. |
title |
Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) |
title_short |
Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) |
title_full |
Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) |
title_fullStr |
Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) |
title_full_unstemmed |
Development and Performance of an Alaska Steeppass Fishway for Sockeye Salmon ( Oncorhynchus nerka ) |
title_sort |
development and performance of an alaska steeppass fishway for sockeye salmon ( oncorhynchus nerka ) |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/f87-008 http://www.nrcresearchpress.com/doi/pdf/10.1139/f87-008 |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) ENVELOPE(177.167,177.167,-84.983,-84.983) ENVELOPE(-57.765,-57.765,49.525,49.525) |
geographic |
Sockeye Weir High Falls |
geographic_facet |
Sockeye Weir High Falls |
genre |
Kodiak Alaska |
genre_facet |
Kodiak Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 44, issue 1, page 66-76 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f87-008 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
44 |
container_issue |
1 |
container_start_page |
66 |
op_container_end_page |
76 |
_version_ |
1785586819926065152 |