Update on abundance of Gulf of Maine/Bay of Fundy harbor porpoises

Palka, Debra L., 1959-

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Update on abundance of Gulf of Maine/Bay of Fundy harbor porpoises

1996
By Palka, Debra L., 1959-
Series: Northeast Fisheries Science Center reference document ; 96-04

[PDF-261.67 KB]

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Details:

Personal Author:

Palka, Debra L., 1959-
Corporate Authors:

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

NMFS (National Marine Fisheries Service) ; NEFSC (Northeast Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; NEFSC (Northeast Fisheries Science Center) Less -
Description:

Abundance of harbor porpoises in the Gulf of Maine/Bay of Fundy during summer 1995 was estimated using techniques developed for the 1991 and 1992 abundance estimates. Line transect sighting survey methods were used so that the probability of detecting an animal on the track line, g(0), was included in the abundance estimate. The 1995 estimated total abundance was 74,000 (95% CI= 40,900 to 109,100; %CV= 20%). This estimate is 51% more than the 1991 estimate, and 9% more than the 1992 estimate. For reference, abundance estimates from 1991 and 1992 were 37,500 (CV= 28.8%; 95% CI= 26,700 to 86,000) and 67,500 (CV= 23.1%; 95% CI= 32,900 to 104,600), respectively. All of these annual abundance estimates may be negatively biased due to several factors including ship avoidance and environmental conditions. The magnitude of these biases are not known.
Content Notes:

by Debra Palka.

"March 1996."

System requirements: Adobe Acrobat Reader.

Includes bibliographical references (pages 21-23).
Keywords:

[+]

Animal Populations Counting Estimates Harbor Porpoise Mathematical Models
Series:

Northeast Fisheries Science Center reference document ; 96-04
Document Type:

Miscellaneous
Place as Subject:

Maine, Gulf of ; Fundy, Bay of

Maine, Gulf of ; Fundy, Bay of Less -
Rights Information:

Public Domain
Compliance:

Library
Main Document Checksum:

[+]

urn:sha256:5576574eae810ad43c554c30cd19debf82ec53e298d3175fca8c1d0e3a6c0340
Download URL:

https://repository.library.noaa.gov/view/noaa/4008/noaa_4008_DS1.pdf
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Update on abundance of Gulf of Maine/Bay of Fundy harbor porpoises

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