journal article
Feb 15, 2022
Premature Mortality Observations among Alaska’s Pacific Salmon During Record Heat and Drought in 2019
Abstract
Abstract
Widespread mortality of Pacific salmon Oncorhynchus spp. returning to spawn in Alaska coincided with record-breaking air temperatures and prolonged drought in summer 2019. Extreme environmental conditions are expected to happen more frequently with rapid climate change and challenge the notion that Alaska could indefinitely provide abundant, cool freshwater habitat for Pacific salmon. A total of 110 geographically widespread opportunistic observations of premature mortality (carcasses) were collected from a variety of sources. Premature mortalities were documented for Pink Salmon Oncorhynchus gorbuscha, Sockeye Salmon O. nerka, Chum Salmon O. keta, Chinook Salmon O. tshawytscha, and Coho Salmon O. kisutch. Additionally, observations of Pink Salmon returning to spawn in Prince William Sound streams in 2019, obtained from systematic aerial surveys conducted annually, revealed low migration success in 87% of rain-driven streams (n = 30), 52% of snow-driven streams (n = 65), and only 18% of glacier-driven streams (n = 11). Salmon mortality observations were consistent with death due to heat stress resulting from high water temperatures or drought caused hypoxia and stranding. Developing a better understanding of how broad-scale climate patterns manifest at the stream scale can help us determine whether a major shift in Pacific salmon productivity is underway and inform fisheries management plans to better mitigate future risks.
Widespread mortality of Pacific salmon Oncorhynchus spp. returning to spawn in Alaska coincided with record-breaking air temperatures and prolonged drought in summer 2019. Extreme environmental conditions are expected to happen more frequently with rapid climate change and challenge the notion that Alaska could indefinitely provide abundant, cool freshwater habitat for Pacific salmon. A total of 110 geographically widespread opportunistic observations of premature mortality (carcasses) were collected from a variety of sources. Premature mortalities were documented for Pink Salmon Oncorhynchus gorbuscha, Sockeye Salmon O. nerka, Chum Salmon O. keta, Chinook Salmon O. tshawytscha, and Coho Salmon O. kisutch. Additionally, observations of Pink Salmon returning to spawn in Prince William Sound streams in 2019, obtained from systematic aerial surveys conducted annually, revealed low migration success in 87% of rain-driven streams (n = 30), 52% of snow-driven streams (n = 65), and only 18% of glacier-driven streams (n = 11). Salmon mortality observations were consistent with death due to heat stress resulting from high water temperatures or drought caused hypoxia and stranding. Developing a better understanding of how broad-scale climate patterns manifest at the stream scale can help us determine whether a major shift in Pacific salmon productivity is underway and inform fisheries management plans to better mitigate future risks.
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References
44
[1]
ACRC (Alaska Climate Research Center) (2020)
[2]
Amaya "Physical drivers of the summer 2019 north Pacific marine heatwave" Nature Communications (2020) 10.1038/s41467-020-15820-w
[3]
Beamer "Hydrologic impacts of changes in climate and glacier extent in the Gulf of Alaska watershed" Water Resources Research (2017) 10.1002/2016wr020033
[4]
Biela "Evidence of prevalent heat stress in Yukon River Chinook Salmon" Canadian Journal of Fisheries and Aquatic Sciences (2020) 10.1139/cjfas-2020-0209
[5]
V. R. (2021)
[6]
Bowerman "Pacific salmon prespawn mortality: patterns, methods, and study design considerations" Fisheries (2016) 10.1080/03632415.2016.1245993
[7]
Brenner (2020)
[8]
Brenner (2021)
[9]
Carey "Egg retention of high-latitude Sockeye Salmon (Oncorhynchus nerka) in the Pilgrim River, Alaska, during the Pacific marine heatwave of 2014–2016" Polar Biology (2021) 10.1007/s00300-021-02902-8
[10]
Crozier "Snake River Sockeye and Chinook Salmon in a changing climate: implications for upstream migration survival during recent extreme and future climates" PLOS One (2020) 10.1371/journal.pone.0238886
[11]
Dahlke "Thermal bottlenecks in the life cycle define climate vulnerability of fish" Science (2020) 10.1126/science.aaz3658
[12]
Donnelly "A manipulative thermal challenge protocol for adult salmonids in remote field settings" Conservation Physiology (2020) 10.1093/conphys/coaa074
[13]
Eliason "Differences in thermal tolerance among Sockeye Salmon populations" Science (2011) 10.1126/science.1199158
[14]
Fisher (2019)
[15]
Fisher (2019)
[16]
Goniea "Behavioral thermoregulation and slowed migration by adult fall Chinook Salmon in response to high Columbia River water temperatures" Transactions of the American Fisheries Society (2006) 10.1577/t04-113.1
[17]
Hinch "Exceptionally high mortality of adult female salmon: a large-scale pattern and a conservation concern" Canadian Journal of Fisheries and Aquatic Sciences (2021) 10.1139/cjfas-2020-0385
[18]
Hinzman "Evidence and implications of recent climate change in Northern Alaska and other Arctic regions" Climatic Change (2005) 10.1007/s10584-005-5352-2
[19]
P. J. (1990)
[20]
Jones "Watershed-scale climate influences productivity of Chinook Salmon populations across southcentral Alaska" Global Change Biology (2020) 10.1111/gcb.15155
[21]
Keefer "Condition-dependent en route migration mortality of adult Chinook Salmon in the Willamette river main stem" North American Journal of Fisheries Management (2017) 10.1080/02755947.2016.1269032
[22]
Littell "Alaska snowpack response to climate change: statewide snowfall equivalent and snowpack water scenarios" Water (2018) 10.3390/w10050668
[23]
McCullough (1999)
[24]
Morella (2021)
[25]
Mueter "Opposite effects of ocean temperature on survival rates of 120 stocks of Pacific salmon (Oncorhynchus spp.) in northern and southern areas" Canadian Journal of Fisheries and Aquatic Sciences (2002) 10.1139/f02-020
[26]
Murphy "Die-offs of pre-spawn adult Pink Salmon and Chum Salmon in southeastern Alaska" North American Journal of Fisheries Management (1985) 10.1577/1548-8659(1985)5<302:dopaps>2.0.co;2
[27]
Nilsson "Extreme events in streams and rivers in arctic and subarctic regions in an uncertain future" Freshwater Biology (2015) 10.1111/fwb.12477
[28]
O’Reilly "Rapid and highly variable warming of lake surface waters around the globe" Geophysical Research Letters (2015)
[29]
Patterson "The influence of water temperature on time to surface for adult Sockeye Salmon carcasses and the limitations in estimating salmon carcasses in the Fraser River, British Columbia" North American Journal of Fisheries Management (2007) 10.1577/m06-098.1
[30]
The Randolph Glacier Inventory: a globally complete inventory of glaciers
W. Tad Pfeffer, Anthony A. Arendt, Andrew Bliss et al.
Journal of Glaciology
2014
10.3189/2014jog13j176
[31]
Pitman "Glacier retreat and Pacific salmon" BioScience (2020) 10.1093/biosci/biaa015
[32]
Post "The polar regions in a 2°C warmer world. Science" Advances (2019)
[33]
Quinn (2018)
[34]
Rand "Effects of river discharge, temperature, and future climates on energetics and mortality of adult migrating Fraser River Sockeye Salmon" Transactions of the American Fisheries Society (2006) 10.1577/t05-023.1
[35]
Russo "Magnitude of extreme heat waves in present climate and their projection in a warming world" Journal of Geophysical Research: Atmospheres (2014)
[36]
Schoen "Future of Pacific salmon in the face of environmental change: lessons from one of the world’s remaining productive Salmon regions" Fisheries (2017) 10.1080/03632415.2017.1374251
[37]
Sergeant "High salmon density and low discharge create periodic hypoxia in coastal rivers" Ecosphere (2017) 10.1002/ecs2.1846
[38]
Sergeant "A classification of streamflow patterns across the coastal Gulf of Alaska" Water Resources Research (2020) 10.1029/2019wr026127
[39]
Shaftel "Thermal diversity of salmon streams in the Matanuska-Susitna Basin, Alaska" Journal of the American Water Resources Association (2020) 10.1111/1752-1688.12839
[40]
Strange "Upper thermal limits to migration in adult Chinook Salmon: evidence from the Klamath River Basin" Transactions of the American Fisheries Society (2010) 10.1577/t09-171.1
[41]
Strange "Migration strategies of adult Chinook Salmon runs in response to diverse environmental conditions in the Klamath River Basin" Transactions of the American Fisheries Society (2012) 10.1080/00028487.2012.716010
[42]
Tillotson "Climate and conspecific density trigger pre-spawning mortality in Sockeye Salmon (Oncorhynchus nerka)" Fisheries Research (2017) 10.1016/j.fishres.2016.12.013
[43]
Valentin "Hydrologic regime changes in a high-latitude glacierized watershed under future climate conditions" Water (2018)
[44]
Westley "Documentation of en route mortality of summer Chum Salmon in the Koyukuk River, Alaska and its potential linkage to the heatwave of 2019" Ecology and Evolution (2020) 10.1002/ece3.6751
Metrics
61
Citations
44
References
Details
- Published
- Feb 15, 2022
- Vol/Issue
- 47(4)
- Pages
- 157-168
- License
- View
Authors
Cite This Article
Vanessa R. Biela, Christopher J Sergeant, Michael P Carey, et al. (2022). Premature Mortality Observations among Alaska’s Pacific Salmon During Record Heat and Drought in 2019. Fisheries, 47(4), 157-168. https://doi.org/10.1002/fsh.10705
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