Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration
Diadromous fish populations have incurred precipitous declines across the globe. Among many stressors, these species are threatened by anthropogenic barriers that impede movement, alter riverine habitat, and augment predator communities. In this study, we used acoustic transmitters (n = 220) with pr...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | https://hdl.handle.net/11368/3071220 https://doi.org/10.1139/cjfas-2023-0175 https://cdnsciencepub.com/doi/10.1139/cjfas-2023-0175 |
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ftunitriestiris:oai:arts.units.it:11368/3071220 2024-09-15T17:55:56+00:00 Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration Mensinger, Matthew A. Hawkes, James P. Goulette, Graham S. Mortelliti, Alessio Blomberg, Erik J. Zydlewski, Joseph D. Mensinger, Matthew A. Hawkes, James P. Goulette, Graham S. Mortelliti, Alessio Blomberg, Erik J. Zydlewski, Joseph D. 2024 https://hdl.handle.net/11368/3071220 https://doi.org/10.1139/cjfas-2023-0175 https://cdnsciencepub.com/doi/10.1139/cjfas-2023-0175 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:001103808600001 volume:81/2024 issue:1 firstpage:38 lastpage:51 numberofpages:14 journal:CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES https://hdl.handle.net/11368/3071220 doi:10.1139/cjfas-2023-0175 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85183896386 https://cdnsciencepub.com/doi/10.1139/cjfas-2023-0175 info:eu-repo/semantics/closedAccess predation salmon dam telemetry migration info:eu-repo/semantics/article 2024 ftunitriestiris https://doi.org/10.1139/cjfas-2023-0175 2024-08-29T05:06:02Z Diadromous fish populations have incurred precipitous declines across the globe. Among many stressors, these species are threatened by anthropogenic barriers that impede movement, alter riverine habitat, and augment predator communities. In this study, we used acoustic transmitters (n = 220) with predation and temperature sensors to characterize Atlantic salmon (Salmo salar) smolt predation risk in the Penobscot River, Maine, USA. Across two seasons, we documented 79 predation events through a 170 km migratory pathway, which included three hydropower projects and a large estuary. We detected tagged smolts that were predated by fish (n = 42), marine mammals (n = 28), and birds (n = 9). Using a multistate mark-recapture framework, we estimated that 46% of smolts were predated during downstream migration, which accounted for at least 55% of all mortality. Relative predation risk was greatest through impoundments and the lower estuary, where on average, predation rates were 4.8-fold and 9.0-fold greater than free-flowing reaches, respectively. These results suggest that predation pressure on Atlantic salmon smolts is exacerbated by hydropower projects and that predation in the lower estuary may be greater than expected. Article in Journal/Newspaper Atlantic salmon Salmo salar Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) Canadian Journal of Fisheries and Aquatic Sciences 81 1 38 51 |
institution |
Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
predation salmon dam telemetry migration |
spellingShingle |
predation salmon dam telemetry migration Mensinger, Matthew A. Hawkes, James P. Goulette, Graham S. Mortelliti, Alessio Blomberg, Erik J. Zydlewski, Joseph D. Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration |
topic_facet |
predation salmon dam telemetry migration |
description |
Diadromous fish populations have incurred precipitous declines across the globe. Among many stressors, these species are threatened by anthropogenic barriers that impede movement, alter riverine habitat, and augment predator communities. In this study, we used acoustic transmitters (n = 220) with predation and temperature sensors to characterize Atlantic salmon (Salmo salar) smolt predation risk in the Penobscot River, Maine, USA. Across two seasons, we documented 79 predation events through a 170 km migratory pathway, which included three hydropower projects and a large estuary. We detected tagged smolts that were predated by fish (n = 42), marine mammals (n = 28), and birds (n = 9). Using a multistate mark-recapture framework, we estimated that 46% of smolts were predated during downstream migration, which accounted for at least 55% of all mortality. Relative predation risk was greatest through impoundments and the lower estuary, where on average, predation rates were 4.8-fold and 9.0-fold greater than free-flowing reaches, respectively. These results suggest that predation pressure on Atlantic salmon smolts is exacerbated by hydropower projects and that predation in the lower estuary may be greater than expected. |
author2 |
Mensinger, Matthew A. Hawkes, James P. Goulette, Graham S. Mortelliti, Alessio Blomberg, Erik J. Zydlewski, Joseph D. |
format |
Article in Journal/Newspaper |
author |
Mensinger, Matthew A. Hawkes, James P. Goulette, Graham S. Mortelliti, Alessio Blomberg, Erik J. Zydlewski, Joseph D. |
author_facet |
Mensinger, Matthew A. Hawkes, James P. Goulette, Graham S. Mortelliti, Alessio Blomberg, Erik J. Zydlewski, Joseph D. |
author_sort |
Mensinger, Matthew A. |
title |
Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration |
title_short |
Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration |
title_full |
Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration |
title_fullStr |
Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration |
title_full_unstemmed |
Dams facilitate predation during Atlantic salmon (Salmo salar) smolt migration |
title_sort |
dams facilitate predation during atlantic salmon (salmo salar) smolt migration |
publishDate |
2024 |
url |
https://hdl.handle.net/11368/3071220 https://doi.org/10.1139/cjfas-2023-0175 https://cdnsciencepub.com/doi/10.1139/cjfas-2023-0175 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:001103808600001 volume:81/2024 issue:1 firstpage:38 lastpage:51 numberofpages:14 journal:CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES https://hdl.handle.net/11368/3071220 doi:10.1139/cjfas-2023-0175 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85183896386 https://cdnsciencepub.com/doi/10.1139/cjfas-2023-0175 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1139/cjfas-2023-0175 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
81 |
container_issue |
1 |
container_start_page |
38 |
op_container_end_page |
51 |
_version_ |
1810432151299031040 |