Population Growth and Demography of White Sturgeon in the Lower Fraser River
White sturgeon were formerly abundant in the lower Fraser River of British Columbia, but have been dramatically reduced by overfishing and habitat loss. Significant efforts have been put into collecting baseline abundance and demographic data over the past decade.
Here we fit an age-based model for white sturgeon to the available length-frequency data from slough and river habitats. Our analysis of the parameterized model indicates that the white sturgeon population in the lower Fraser River was declining through the 1980s and into the 1990s. We estimate a growth rate in the range of λ=0.90 to λ=0.96, which corresponds to a 4%−10% decrease in the population each year. Thus, we infer that improving juvenile survival in the slough habitats is key to conserving this white sturgeon population.
Simple
- Date (Publication)
- 2005
- Cited responsible party
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Organisation name Individual name Electronic mail address Role Pacific Environmental Institute
C.D. Levings
Principal investigator Department of Biological Sciences University of Calgary
William A. Nelson
Principal investigator Department of Biological Sciences University of Calgary
Andrew J. Paul
Principal investigator
- Presentation form
- Digital document
- Name
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American Fisheries Society
- Issue identification
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Population demography of white sturgeon
- Purpose
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Here we fit an age-based model for white sturgeon to the available length-frequency data from slough and river habitats in the lower Fraser River.
- Credit
-
We thank Chris Perrin, Marvin Rosenau, and David Lane for providing us access
to the data, and Mike Parsley and Selina Heppell for their thoughtful comments on an earlier draft
of the manuscript. WAN received support from a CRC chair to Ed McCauley and from the DFO Science
Branch. AJP received support through the G8 Legacy Chair in
Wildlife Ecology.
- Status
- Completed
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Global Change Master Directory (GCMD) Science Keywords v15.9
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Earth Science > Biological Classification > Animals/Vertebrates > Fish > Ray-finned Fishes > Sturgeons/Paddlefishes
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DFO Areas
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North Pacific Ocean > Fraser River and BC Interior
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- Language
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English
- Character set
- UTF8
- Topic category
-
- Oceans
- Environment description
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3.33 Mb
))
- Begin
- 1995
- End
- 2000
- Distribution format
-
Name Version electronic
none
- Distributor contact
-
Organisation name Individual name Electronic mail address Role Pacific Salmon Foundation
Isobel Pearsall
Distributor
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://www.dfo-mpo.gc.ca/science/data-donnees/index-eng.html DFO Science website
WWW:DOWNLOAD-1.0-http--download
https://soggy2.zoology.ubc.ca/geonetwork/srv/api/records/6dd10167-1296-48f7-bf85-02d7ed67d2d7/attachments/6dd10167-1296-48f7-bf85-02d7ed67d2d7.pdf 6dd10167-1296-48f7-bf85-02d7ed67d2d7.pdf WWW:DOWNLOAD-1.0-http--download
https://soggy2.zoology.ubc.ca/geonetwork/srv/api/records/6dd10167-1296-48f7-bf85-02d7ed67d2d7/attachments/6dd10167-1296-48f7-bf85-02d7ed67d2d7.xlsx 6dd10167-1296-48f7-bf85-02d7ed67d2d7.xlsx
- Hierarchy level
- Dataset
- Statement
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Levings produced paper copy. Fraser scanned with Fujitsu Scansnap s1500 (ABBY Finereader OCR software). Data was extracted through Adobe Reader conversion and manual entry into MS Excel.
Metadata
- File identifier
- 6dd10167-1296-48f7-bf85-02d7ed67d2d7 XML
- Metadata language
-
eng
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-12-19T00:17:48.319Z
- Metadata standard name
-
North American Profile of ISO19115:2003 - Geographic information - Metadata
- Metadata standard version
-
NAP - CAN/CGSB-171.100-2009
- Metadata author
-
Organisation name Individual name Electronic mail address Role Pacific Salmon Foundation
Charles-David Clayton
Author
- Other language
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Language Character encoding French UTF8 English UTF8
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