[Source_Name: Short_Name='DHC-6']
NMML Harbor Porpoise Aerial Survey, SE Alaska, Replicate 1, 1993
Entry ID: seamap139

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Summary
Abstract: On 1 to 26 June 1993, as part of a larger study, Alaska harbor
porpoise (Phocoena phocoena) abundance was investigated during an aerial survey
from Prince William Sound to Dixon Entrance. Employing a Twin Otter as the
survey platform, the first of three identical saw-tooth tracklines was flown at
an altitude of 152.2 m (500ft) and at an airspeed of 100 kn. Line-transect
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Purpose: Although harbor porpoises, Phocoena phocoena, are known to occur
throughout Alaska waters (Fiscus et al. 1976; Leatherwood and Reeves 1978;
Lawry et al. 1982; Leatherwood et al. 1983), few estimates of abundance exist.
In 1991, the National Marine Mammal Laboratory initiated a 3-yr study on Alaska
harbor porpoises. The objectives of this program were to: 1) Obtain minimum
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Geographic Coverage
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Spatial coordinates   
  N: 60.58   S: 54.48   E: -132.27   W: -147.53

Data Set Citation
Dataset Originator/Creator: National Marine Mammal Laboratory
Dataset Title: NMML Harbor Porpoise Aerial Survey, SE Alaska, Replicate 1, 1993
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2004-08-09 16:51:05.956453-04
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital data
Online Resource: http://nmml.afsc.noaa.gov/
Parent DIF
This data set description is a member of a collection. The collection is described in
OBIS-SEAMAP
Temporal Coverage
Start Date: 1993-06-02
Stop Date: 1993-06-26
Location Keywords
Data Resolution
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
Science Keywords
ISO Topic Category
Platform
DHC-6 > DeHavilland Twin Otter Ancillary Description
Project
Access Constraints ACCESS CONSTRAINTS: Open public unless otherwise noted.

DISTRIBUTION LIABILITY: Not to hold OBIS-SEAMAP liable for errors in the data.
While we have made every effort to ensure the quality of the database, we
cannot guarantee the accuracy of these datasets. Also please refer to Use
Constraints.
Use Constraints Not to use data contained in OBIS-SEAMAP in any publication, product, or
commercial application without prior written consent of the original data
provider. To cite both the data provider and OBIS-SEAMAP appropriately after
approval of use is obtained. Also please refer to Distribution Liability.
Ancillary Keywords
Data Set Progress
COMPLETE
Originating Center
Data Center
OBIS Spatial Ecological Analysis of Megavertebrate Populations Supplemental Info
Data Center URL: http://seamap.env.duke.edu/

Data Center Personnel
Name: PATRICK N. HALPIN
Phone: 919-613-8062
Email: phalpin at duke.edu
Contact Address:
Duke University
Box 90328
City: Durham
Province or State: NC
Postal Code: 27708
Country: USA
Distribution
Distribution Format: Shapefile
Personnel
EI FUJIOKA
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: 919-613-8021
Fax: 919-684-8741
Email: efujioka at duke.edu
Contact Address:
LSRC A321
Box 90328
City: Durham
Province or State: NC
Postal Code: 27708
Country: USA
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Publications/References
M. Dahlheim et al. Harbor porpoise (Phocoena phocoena) abundance in Alaska:
Bristol Bay to Southeast Alaska, 1991-1993. 2000. Marine Mammal Science. 16(1):
28-45.
Creation and Review Dates
DIF Creation Date: 2007-01-22
Last DIF Revision Date: 2008-08-29

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