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.

Date (Publication) Date (Publication): 2005

Cited responsible party

Organisation name	Individual name	Role
Pacific Environmental Institute	C.D. Levings	Point de recherche Principal investigator
Department of Biological Sciences University of Calgary	William A. Nelson	Point de recherche Principal investigator
Department of Biological Sciences University of Calgary	Andrew J. Paul	Point de recherche Principal investigator

Forme de la présentation Presentation form: Document numérique

Digital document

Name: American Fisheries Society

Issue identification: Population demography of white sturgeon

Purpose: 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.

Etat Status: Finalisé

Completed

Global Change Master Directory (GCMD) Science Keywords v15.9

Earth Science > Biological Classification > Animals/Vertebrates > Fish > Ray-finned Fishes > Sturgeons/Paddlefishes

DFO Areas

North Pacific Ocean > Fraser River and BC Interior

Language: English

Encodage des caractères Character set: Utf8

UTF8

Catégorie ISO Topic category

Océans

Oceans

Environment description: 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		Distributeur Distributor

OnLine resource

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

Niveau Hierarchy level: Jeu de données

Dataset

Statement: 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

Identifiant de la fiche File identifier: 6dd10167-1296-48f7-bf85-02d7ed67d2d7 XML

Metadata language: eng

Jeu de caractères Character set: Utf8

UTF8

Type de ressource Hierarchy level: Jeu de données

Dataset

Date des métadonnées 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		Auteur Author

Other language

Language	Character encoding
Français French	Utf8 UTF8
Anglais English	Utf8 UTF8

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