Preliminary estimates of harbor porpoise abundance in California from 1999 and 2002

Carretta, James V.; Forney, Karin A.

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Preliminary estimates of harbor porpoise abundance in California from 1999 and 2002

2004
By Carretta, James V. ; Forney, Karin A.
Series: Administrative report LJ ; 04-01

[PDF-177.61 KB]

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Personal Author:

Carretta, James V. ; Forney, Karin A.

Carretta, James V. ; Forney, Karin A. Less -
Corporate Authors:

Southwest Fisheries Science Center (U.S.)
NOAA Program & Office:

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

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center) Less -
Description:

Abundance estimates of harbor porpoise in California waters based on 1999 and 2002 summer/autumn aerial line-transect surveys are presented. Pooled estimates of abundance (CVs in parentheses) for both survey years by area are: Morro Bay, N= 1,656 (0.39); Monterey Bay, N = 1,613 (0.42); San Francisco-Russian River, N = 8,521 (0.38); and Northern California, N = 12,889 (0.38). A total of 24,679 (0.37) porpoise are estimated in California waters, the highest total to date from aerial line-transect surveys in this region. An updated abundance for the Northern California/Southern Oregon stock will not be available until results from 2002/2003 surveys in southern Oregon are available. No statistically significant differences in abundance were found for the periods 1997-99 and 1999-2002 for any of the stocks/areas.
Content Notes:

James V. Carretta, Karin A. Forney.

"January 2004."

System requirements: Adobe Acrobat Reader.

Includes bibliographical references (pages 8-9).
Keywords:

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Estimates Harbor Porpoise Population Research
Series:

Administrative report LJ ; 04-01
Document Type:

Administrative Report
Place as Subject:

California
Rights Information:

Public Domain
Compliance:

Library
Main Document Checksum:

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urn:sha256:d479cce532cfe97743d37b0bd439f782c3651986158fe717065f9491aac26a1a
Download URL:

https://repository.library.noaa.gov/view/noaa/4653/noaa_4653_DS1.pdf
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Preliminary estimates of harbor porpoise abundance in California from 1999 and 2002

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