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NMML Harbor Porpoise Aerial Survey, SE Alaska, 1991
Entry ID: seamap142

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Summary
Abstract: On 15 August 1991, as part of a larger study, Alaska harbor porpoise
(Phocoena phocoena) abundance was investigated during an aerial survey of
waters off southeastern Alaska. A Twin Otter was used to fly a single sawtooth
trackline at an altitude of 152.2 m (500ft) and at an airspeed of 100 kn.
Line-transect methodology was used, and only those observations made during
optimal conditions were analyzed. Density of harbor porpoises was calculated
using line transect estimates based on perpendicular distances of sightings to
the cruise track of the airplane.

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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Caption:  Long-term Vegetation Assessment in Wyoming
 
Geographic Coverage
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Spatial coordinates   
  N: 45.0   S: 40.95   E: -103.84   W: -111.26

Data Set Citation
Dataset Originator/Creator: Hunt, E. R., Jr. and M. M. Barlow.
Dataset Title: Long-term Vegetation Assessment in Wyoming using Landsat Multi Spectral Scanner (MSS) Data
Dataset Release Date: 1997
Dataset Release Place: Laramie, Wyoming
Dataset Publisher: Wyoming Geographic Information Science Center
Data Presentation Form: Satellite Imagery
Online Resource: http://www.wygisc.uwyo.edu/wbn/mss.html
Temporal Coverage
Start Date: 1972-01-01
Stop Date: 1992-12-31
Location Keywords
Data Resolution
Latitude Resolution: 1
Longitude Resolution: 1
Horizontal Resolution Range: 30 meters - < 100 meters
Science Keywords
ISO Topic Category
Platform
LANDSAT Ancillary Description
LANDSAT-1 Ancillary Description
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Instrument
MSS > Multispectral Scanner Ancillary Description
Access Constraints None
Use Constraints None
Ancillary Keywords
Data Set Progress
COMPLETE
Originating Center
Data Center
Wyoming Geographic Information Science Center, University of Wyoming Supplemental Info
Data Center URL: http://www.wygisc.uwyo.edu/

Data Center Personnel
Name: WYGISC TECHNICAL COORDINATOR
Phone: 307-766-2532
Fax: 307-766-2744
Contact Address:
WYGISC
1000 E University Ave Dept 4008
City: Laramie
Province or State: WY
Postal Code: 82071
Country: USA
Distribution
Distribution Media: Online
Fees: No fees
Personnel
MARGO BERENDSEN
Role: DIF AUTHOR
Phone: 307-766-2751
Email: meh at uwyo.edu
Contact Address:
Wyoming Geographic Information Science Center
University of Wyoming
1000 E. University Ave.
City: Laramie
Province or State: WY
Postal Code: 82071
Country: USA
Creation and Review Dates
DIF Creation Date: 2004-06-03
Last DIF Revision Date: 2008-07-22

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