Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications
The Penobscot River Restoration Project (PRRP), to be completed in 2016, involved an extensive plan of dam removal, increases in hydroelectric capacity, and fish passage modifications to increase habitat access for diadromous species. As part of the PRRP, GreatWorks and Veazie dams were removed, mak...
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ftbioone:10.1080/19425120.2016.1185063 2024-06-02T08:03:28+00:00 Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications Lisa K. Izzo George A. Maynard Lisa K. Izzo George A. Maynard world 2016-09-28 text/HTML https://doi.org/10.1080/19425120.2016.1185063 en eng American Fisheries Society doi:10.1080/19425120.2016.1185063 All rights reserved. https://doi.org/10.1080/19425120.2016.1185063 Text 2016 ftbioone https://doi.org/10.1080/19425120.2016.1185063 2024-05-07T00:51:43Z The Penobscot River Restoration Project (PRRP), to be completed in 2016, involved an extensive plan of dam removal, increases in hydroelectric capacity, and fish passage modifications to increase habitat access for diadromous species. As part of the PRRP, GreatWorks and Veazie dams were removed, making Milford Dam the first impediment to federally endangered Atlantic Salmon Salmo salar. Upstream habitat access for Atlantic Salmon is dependent upon successful and timely passage at Milford Dam because nearly all suitable spawning habitat is located upstream. In 2014 and 2015, a total of 73 adult salmon were radio-tagged to track their upstream movements through the Penobscot River to assess potential delays at (1) the dam remnants, (2) the confluence of the Stillwater Branch and the main stem of the Penobscot River below the impassableOrono Dam, and (3) the Milford Damfish lift (installed in 2014). Movement rates through the dam remnants and the Stillwater confluence were comparable to open river reaches. Passage efficiency of the fish lift was high in both years (95% and 100%). However, fish experienced long delays at Milford Dam, with approximately one-third of fish taking more than a week to pass in each year, well below the Federal Energy Regulatory Commission passage standard of 95%within 48 h. Telemetry indicates most fish locate the fishway entrance within 5 h of arrival and were observed at the entrance at all hours of the day. These data indicate that overall transit times through the lower river were comparable to reported movement rates prior to changes to the Penobscot River due to the substantial delays seen at Milford Dam. The results of this study show that while adult Atlantic Salmon locate the new fish lift entrance quickly, passage of these fish was significantly delayed under 2014–2015 operations. Text Atlantic salmon Salmo salar BioOne Online Journals Marine and Coastal Fisheries 8 1 448 461 |
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The Penobscot River Restoration Project (PRRP), to be completed in 2016, involved an extensive plan of dam removal, increases in hydroelectric capacity, and fish passage modifications to increase habitat access for diadromous species. As part of the PRRP, GreatWorks and Veazie dams were removed, making Milford Dam the first impediment to federally endangered Atlantic Salmon Salmo salar. Upstream habitat access for Atlantic Salmon is dependent upon successful and timely passage at Milford Dam because nearly all suitable spawning habitat is located upstream. In 2014 and 2015, a total of 73 adult salmon were radio-tagged to track their upstream movements through the Penobscot River to assess potential delays at (1) the dam remnants, (2) the confluence of the Stillwater Branch and the main stem of the Penobscot River below the impassableOrono Dam, and (3) the Milford Damfish lift (installed in 2014). Movement rates through the dam remnants and the Stillwater confluence were comparable to open river reaches. Passage efficiency of the fish lift was high in both years (95% and 100%). However, fish experienced long delays at Milford Dam, with approximately one-third of fish taking more than a week to pass in each year, well below the Federal Energy Regulatory Commission passage standard of 95%within 48 h. Telemetry indicates most fish locate the fishway entrance within 5 h of arrival and were observed at the entrance at all hours of the day. These data indicate that overall transit times through the lower river were comparable to reported movement rates prior to changes to the Penobscot River due to the substantial delays seen at Milford Dam. The results of this study show that while adult Atlantic Salmon locate the new fish lift entrance quickly, passage of these fish was significantly delayed under 2014–2015 operations. |
author2 |
Lisa K. Izzo George A. Maynard |
format |
Text |
author |
Lisa K. Izzo George A. Maynard |
spellingShingle |
Lisa K. Izzo George A. Maynard Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications |
author_facet |
Lisa K. Izzo George A. Maynard |
author_sort |
Lisa K. Izzo |
title |
Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications |
title_short |
Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications |
title_full |
Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications |
title_fullStr |
Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications |
title_full_unstemmed |
Upstream Movements of Atlantic Salmon in the Lower Penobscot River, Maine Following Two Dam Removals and Fish Passage Modifications |
title_sort |
upstream movements of atlantic salmon in the lower penobscot river, maine following two dam removals and fish passage modifications |
publisher |
American Fisheries Society |
publishDate |
2016 |
url |
https://doi.org/10.1080/19425120.2016.1185063 |
op_coverage |
world |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
https://doi.org/10.1080/19425120.2016.1185063 |
op_relation |
doi:10.1080/19425120.2016.1185063 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1080/19425120.2016.1185063 |
container_title |
Marine and Coastal Fisheries |
container_volume |
8 |
container_issue |
1 |
container_start_page |
448 |
op_container_end_page |
461 |
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1800747986525880320 |