Status of common thresher sharks, Alopias vulpinus, along the west coast of North America

Teo, Steven Lip Heng; Rodriguez, Emiliano Garcia; Sosa-Nishizaki, Oscar

doi:10.7289/V5/TM-SWFSC-557

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Status of common thresher sharks, Alopias vulpinus, along the west coast of North America

2016

By Teo, Steven Lip Heng ; Rodriguez, Emiliano Garcia ; Sosa-Nishizaki, Oscar ;

Series: NOAA technical memorandum NMFS

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Personal Author:

Teo, Steven Lip Heng ; Rodriguez, Emiliano Garcia ; Sosa-Nishizaki, Oscar ;

Corporate Authors:

Southwest Fisheries Science Center (U.S.) ;

NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center) ;

Description:

"In this assessment, common thresher sharks along the west coast of North America are assumed to be a single, well-mixed stock. This assumption is supported by their genetics, tagging data, and seasonal movements. The mitochondrial genetic sequences of common thresher sharks from California waters are not significantly different from Oregon-Washington waters but both are significantly different from other sampling locations, noting that there have not been any published comparisons with samples from Mexico. There is also no evidence of pupping and nursery grounds outside of the SCB. Tags from common thresher sharks tagged in the SCB have been returned from California, USA, and Baja California, Mexico. There is also unlikely to be substantial interchange of individuals between this stock and other common thresher shark stocks because the geographically closest stock is likely to be along the west coast of Chile"--Executive summary. [ ]

Content Notes:

Steven L. H. Teo, Emiliano Garcia Rodriguez, Oscar Sosa-Nishizaki. doi:10.7289/V5/TM-SWFSC-557 (http://dx.doi.org/10.7289/V5/TM-SWFSC-557) "March 2016." System requirements: Adobe Acrobat Reader. Includes bibliographical references (pages58-62)

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Series:

NOAA technical memorandum NMFS ; NOAA-TM-NMFS-SWFSC ; 557;

DOI:

http://doi.org/10.7289/V5/TM-SWFSC-557

Document Type:

Technical Memorandum ;

Place as Subject:

Pacific Coast (North America) ;

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Public Domain

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Status of common thresher sharks, Alopias vulpinus, along the west coast of North America

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