Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015
Pacific salmon hatcheries support important commercial fisheries for Pink Salmon (Oncorhynchus gorbuscha) and Chum Salmon (O. keta) in Prince William Sound (PWS), Alaska. State policy mandates that hatchery-produced fish not negatively impact natural populations, which can occur in mixed fisheries a...
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Knowledge Network for Biocomplexity
2020
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dataone:urn:uuid:44ffe74b-5448-4d12-9019-fa82b07c6661 2024-06-03T18:47:06+00:00 Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 E. Eric Knudsen Peter S. Rand Kristen B. Gorman David R. Bernard William D. Templin Prince William Sound, Alaska ENVELOPE(-148.86859,-145.50986,61.1958,60.097713) BEGINDATE: 2013-05-15T00:00:00Z ENDDATE: 2015-09-30T00:00:00Z 2020-08-20T00:00:00Z https://search.dataone.org/view/urn:uuid:44ffe74b-5448-4d12-9019-fa82b07c6661 unknown Knowledge Network for Biocomplexity Alaska Chum Salmon ecological interactions hatcheries Pink Salmon Prince William Sound Oncorhynchus gorbuscha Oncorhynchus keta Dataset 2020 dataone:urn:node:KNB 2024-06-03T18:16:43Z Pacific salmon hatcheries support important commercial fisheries for Pink Salmon (Oncorhynchus gorbuscha) and Chum Salmon (O. keta) in Prince William Sound (PWS), Alaska. State policy mandates that hatchery-produced fish not negatively impact natural populations, which can occur in mixed fisheries and via ecological and genetic interactions. Therefore, we quantified the spatial and temporal overlap of natural- and hatchery-origin 1) as they migrated into PWS and 2) in PWS spawning streams. Intensive sampling during 2013-2015, combined with ancillary agency harvest and hatchery composition data, also allowed us to estimate the hatchery, natural, and total run sizes. Estimated annual proportions of hatchery fish in the pre-harvest run ranged from 0.55 (SE = 0.01) to 0.86 (SE = 0.03) for Pink Salmon and from 0.51 (SE = 0.03) to 0.73 (SE = 0.02) for Chum Salmon. Proportions of hatchery fish across all sampled PWS spawning streams were much lower: ranging from 0.05 (SE = 0.03) to 0.15 (SE = 0.07) for Pink Salmon and from 0.03 (SE = 0.03) to 0.09 (SE = 0.03) for Chum Salmon. In both species, relatively high in-stream proportions of hatchery fish tended to be geographically localized, while many streams exhibited low proportions. The estimated total PWS runs were 50-142 million Pink Salmon and 2.3-5.4 million Chum Salmon. Commercial fisheries harvested 94-99% of hatchery-origin fish of both species and 27-50% of natural-origin Pink Salmon and 17-20% of natural-origin Chum Salmon. Despite very high harvest rates on hatchery-produced fish, an estimated 0.8-4.5 million hatchery Pink Salmon and 30-90 thousand hatchery Chum Salmon strayed into PWS spawning streams. Our findings provide context for research on the relative productivity of hatchery- and natural-origin salmon spawning in streams, density-dependent survival, improvements in fidelity to hatchery release sites, influence of hatchery production on escapement management and policy, and refinements in harvest management precision in PWS. Dataset Oncorhynchus gorbuscha Pink salmon Alaska Knowledge Network for Biocomplexity (via DataONE) Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Pacific ENVELOPE(-148.86859,-145.50986,61.1958,60.097713) |
institution |
Open Polar |
collection |
Knowledge Network for Biocomplexity (via DataONE) |
op_collection_id |
dataone:urn:node:KNB |
language |
unknown |
topic |
Alaska Chum Salmon ecological interactions hatcheries Pink Salmon Prince William Sound Oncorhynchus gorbuscha Oncorhynchus keta |
spellingShingle |
Alaska Chum Salmon ecological interactions hatcheries Pink Salmon Prince William Sound Oncorhynchus gorbuscha Oncorhynchus keta E. Eric Knudsen Peter S. Rand Kristen B. Gorman David R. Bernard William D. Templin Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 |
topic_facet |
Alaska Chum Salmon ecological interactions hatcheries Pink Salmon Prince William Sound Oncorhynchus gorbuscha Oncorhynchus keta |
description |
Pacific salmon hatcheries support important commercial fisheries for Pink Salmon (Oncorhynchus gorbuscha) and Chum Salmon (O. keta) in Prince William Sound (PWS), Alaska. State policy mandates that hatchery-produced fish not negatively impact natural populations, which can occur in mixed fisheries and via ecological and genetic interactions. Therefore, we quantified the spatial and temporal overlap of natural- and hatchery-origin 1) as they migrated into PWS and 2) in PWS spawning streams. Intensive sampling during 2013-2015, combined with ancillary agency harvest and hatchery composition data, also allowed us to estimate the hatchery, natural, and total run sizes. Estimated annual proportions of hatchery fish in the pre-harvest run ranged from 0.55 (SE = 0.01) to 0.86 (SE = 0.03) for Pink Salmon and from 0.51 (SE = 0.03) to 0.73 (SE = 0.02) for Chum Salmon. Proportions of hatchery fish across all sampled PWS spawning streams were much lower: ranging from 0.05 (SE = 0.03) to 0.15 (SE = 0.07) for Pink Salmon and from 0.03 (SE = 0.03) to 0.09 (SE = 0.03) for Chum Salmon. In both species, relatively high in-stream proportions of hatchery fish tended to be geographically localized, while many streams exhibited low proportions. The estimated total PWS runs were 50-142 million Pink Salmon and 2.3-5.4 million Chum Salmon. Commercial fisheries harvested 94-99% of hatchery-origin fish of both species and 27-50% of natural-origin Pink Salmon and 17-20% of natural-origin Chum Salmon. Despite very high harvest rates on hatchery-produced fish, an estimated 0.8-4.5 million hatchery Pink Salmon and 30-90 thousand hatchery Chum Salmon strayed into PWS spawning streams. Our findings provide context for research on the relative productivity of hatchery- and natural-origin salmon spawning in streams, density-dependent survival, improvements in fidelity to hatchery release sites, influence of hatchery production on escapement management and policy, and refinements in harvest management precision in PWS. |
format |
Dataset |
author |
E. Eric Knudsen Peter S. Rand Kristen B. Gorman David R. Bernard William D. Templin |
author_facet |
E. Eric Knudsen Peter S. Rand Kristen B. Gorman David R. Bernard William D. Templin |
author_sort |
E. Eric Knudsen |
title |
Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 |
title_short |
Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 |
title_full |
Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 |
title_fullStr |
Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 |
title_full_unstemmed |
Hatchery-origin stray rates and total run characteristics for Pink Salmon and Chum Salmon returning to Prince William Sound, Alaska in 2013-2015 |
title_sort |
hatchery-origin stray rates and total run characteristics for pink salmon and chum salmon returning to prince william sound, alaska in 2013-2015 |
publisher |
Knowledge Network for Biocomplexity |
publishDate |
2020 |
url |
https://search.dataone.org/view/urn:uuid:44ffe74b-5448-4d12-9019-fa82b07c6661 |
op_coverage |
Prince William Sound, Alaska ENVELOPE(-148.86859,-145.50986,61.1958,60.097713) BEGINDATE: 2013-05-15T00:00:00Z ENDDATE: 2015-09-30T00:00:00Z |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-148.86859,-145.50986,61.1958,60.097713) |
geographic |
Keta Pacific |
geographic_facet |
Keta Pacific |
genre |
Oncorhynchus gorbuscha Pink salmon Alaska |
genre_facet |
Oncorhynchus gorbuscha Pink salmon Alaska |
_version_ |
1800876072398487552 |