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NMML Small Cetacean (coastal) Aerial Survey 1999, Gulf of Alaska
Entry ID: seamap117

Abstract: The National Marine Mammal Laboratory (NMML) conducted an aerial
survey for small cetaceans from 5 June to 4 July 1999 in Bristol Bay and along
southwestern Alaska Peninsula (out to the 1829 m (1000 fm) depth contour). A
total of 8,522 km were surveyed in a Dehavilland Twin Otter at 152.5 m (500 ft)
altitude and 185 km/hr (100 kts). Two overlapping sawtooth lines were ... View entire text

Purpose: The current study (1997-99) will provide new abundance estimates for
each stock of harbor porpoise, and Dall's porpoise.

SUPPLEMENTAL INFORMATION: Although the previous harbor porpoise surveys (1991-
1993) used a vessel platform for the inside waters of Southeast Alaska
(Dahlheim et al. 1992, 1993, 1994), the current survey was conducted entirely
from ... View entire text
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Description: Access data from the OBIS and OBIS-SEAMAP websites.
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Geographic Coverage
Spatial coordinates   
  N: 59.07   S: 53.93   E: -157.07   W: -164.77

Data Set Citation
Dataset Originator/Creator: National Marine Mammal Laboratory
Dataset Title: NMML Small Cetacean (coastal) Aerial Survey 1999, Gulf of Alaska
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2004-06-10 15:26:46.835071-04
Dataset Release Place:
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital data
Online Resource:
Parent DIF
This description is a member of a collection. The collection is described in

Temporal Coverage
Start Date: 1999-06-11
Stop Date: 1999-07-04
Data Resolution
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
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
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.
Data Set Progress
Data Center
OBIS Spatial Ecological Analysis of Megavertebrate Populations Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 919-613-8062
Email: phalpin at
Contact Address:
Duke University
Box 90328
City: Durham
Province or State: NC
Postal Code: 27708
Country: USA
Distribution Format: Shapefile
Phone: 919-613-8021
Fax: 919-684-8741
Email: efujioka at
Contact Address:
Box 90328
City: Durham
Province or State: NC
Postal Code: 27708
Country: USA
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Creation and Review Dates
DIF Creation Date: 2007-01-22
Last DIF Revision Date: 2017-08-24