Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report.
Historically, salmon stocks from the Columbia River and Snake River formed one of the most valuable fisheries on the west coast of North America. However, salmon and steelhead returns sharply declined during the 1980s and 1990s to reach nearly 1 million fish. Although several factors may be responsi...
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ftosti:oai:osti.gov:962202 2023-07-30T04:07:30+02:00 Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. Trudel, Marc Tucker, Strahan Morris, John 2014-10-10 application/pdf http://www.osti.gov/servlets/purl/962202 https://www.osti.gov/biblio/962202 https://doi.org/10.2172/962202 unknown http://www.osti.gov/servlets/purl/962202 https://www.osti.gov/biblio/962202 https://doi.org/10.2172/962202 doi:10.2172/962202 13 HYDRO ENERGY BIOMASS CLIMATES COLUMBIA RIVER COLUMBIA RIVER BASIN COPEPODS FEEDING FISHERIES FOOD CHAINS HIGH SEAS LIFE CYCLE MITIGATION NUTRIENTS PHYTOPLANKTON PLANKTON SALMON ZOOPLANKTON 2014 ftosti https://doi.org/10.2172/962202 2023-07-11T08:47:30Z Historically, salmon stocks from the Columbia River and Snake River formed one of the most valuable fisheries on the west coast of North America. However, salmon and steelhead returns sharply declined during the 1980s and 1990s to reach nearly 1 million fish. Although several factors may be responsible for the decline of Columbia River salmon and steelhead, there is increasing evidence that these drastic declines were primarily attributable to persistently unfavorable ocean conditions. Hence, an understanding of the effects of ocean conditions on salmon production is required to forecast the return of salmon to the Columbia River basin and to assess the efficacy of mitigation measures such as flow regulation on salmon resources in this system. The Canadian Program on High Seas Salmon has been collecting juvenile salmon and oceanographic data off the west coast of British Columbia and Southeast Alaska since 1998 to assess the effects of ocean conditions on the distribution, migration, growth, and survival of Pacific salmon. Here, we present a summary of the work conducted as part of the Canada-USA Salmon Shelf Survival Study during the 2008 fiscal year and compare these results with those obtained from previous years. The working hypothesis of this research is that fast growth enhances the marine survival of salmon, either because fast growing fish quickly reach a size that is sufficient to successfully avoid predators, or because they accumulate enough energy reserves to better survive their first winter at sea, a period generally considered critical in the life cycle of salmon. Sea surface temperature decreased from FY05 to FY08, whereas, the summer biomass of phytoplankton increased steadily off the west coast of Vancouver Island from FY05 to FY08. As in FY07, zooplankton biomass was generally above average off the west coast of Vancouver Island in FY08. Interestingly, phytoplankton and zooplankton biomass were higher in FY08 than was expected from the observed nutrient concentration that year. This suggests ... Other/Unknown Material Alaska Copepods SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Canada Pacific British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
13 HYDRO ENERGY BIOMASS CLIMATES COLUMBIA RIVER COLUMBIA RIVER BASIN COPEPODS FEEDING FISHERIES FOOD CHAINS HIGH SEAS LIFE CYCLE MITIGATION NUTRIENTS PHYTOPLANKTON PLANKTON SALMON ZOOPLANKTON |
spellingShingle |
13 HYDRO ENERGY BIOMASS CLIMATES COLUMBIA RIVER COLUMBIA RIVER BASIN COPEPODS FEEDING FISHERIES FOOD CHAINS HIGH SEAS LIFE CYCLE MITIGATION NUTRIENTS PHYTOPLANKTON PLANKTON SALMON ZOOPLANKTON Trudel, Marc Tucker, Strahan Morris, John Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. |
topic_facet |
13 HYDRO ENERGY BIOMASS CLIMATES COLUMBIA RIVER COLUMBIA RIVER BASIN COPEPODS FEEDING FISHERIES FOOD CHAINS HIGH SEAS LIFE CYCLE MITIGATION NUTRIENTS PHYTOPLANKTON PLANKTON SALMON ZOOPLANKTON |
description |
Historically, salmon stocks from the Columbia River and Snake River formed one of the most valuable fisheries on the west coast of North America. However, salmon and steelhead returns sharply declined during the 1980s and 1990s to reach nearly 1 million fish. Although several factors may be responsible for the decline of Columbia River salmon and steelhead, there is increasing evidence that these drastic declines were primarily attributable to persistently unfavorable ocean conditions. Hence, an understanding of the effects of ocean conditions on salmon production is required to forecast the return of salmon to the Columbia River basin and to assess the efficacy of mitigation measures such as flow regulation on salmon resources in this system. The Canadian Program on High Seas Salmon has been collecting juvenile salmon and oceanographic data off the west coast of British Columbia and Southeast Alaska since 1998 to assess the effects of ocean conditions on the distribution, migration, growth, and survival of Pacific salmon. Here, we present a summary of the work conducted as part of the Canada-USA Salmon Shelf Survival Study during the 2008 fiscal year and compare these results with those obtained from previous years. The working hypothesis of this research is that fast growth enhances the marine survival of salmon, either because fast growing fish quickly reach a size that is sufficient to successfully avoid predators, or because they accumulate enough energy reserves to better survive their first winter at sea, a period generally considered critical in the life cycle of salmon. Sea surface temperature decreased from FY05 to FY08, whereas, the summer biomass of phytoplankton increased steadily off the west coast of Vancouver Island from FY05 to FY08. As in FY07, zooplankton biomass was generally above average off the west coast of Vancouver Island in FY08. Interestingly, phytoplankton and zooplankton biomass were higher in FY08 than was expected from the observed nutrient concentration that year. This suggests ... |
author |
Trudel, Marc Tucker, Strahan Morris, John |
author_facet |
Trudel, Marc Tucker, Strahan Morris, John |
author_sort |
Trudel, Marc |
title |
Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. |
title_short |
Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. |
title_full |
Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. |
title_fullStr |
Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. |
title_full_unstemmed |
Canada-USA Salmon Shelf Survival Study, 2007-2008 Annual Report. |
title_sort |
canada-usa salmon shelf survival study, 2007-2008 annual report. |
publishDate |
2014 |
url |
http://www.osti.gov/servlets/purl/962202 https://www.osti.gov/biblio/962202 https://doi.org/10.2172/962202 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) |
geographic |
Canada Pacific British Columbia |
geographic_facet |
Canada Pacific British Columbia |
genre |
Alaska Copepods |
genre_facet |
Alaska Copepods |
op_relation |
http://www.osti.gov/servlets/purl/962202 https://www.osti.gov/biblio/962202 https://doi.org/10.2172/962202 doi:10.2172/962202 |
op_doi |
https://doi.org/10.2172/962202 |
_version_ |
1772820892756213760 |