SWFSC Cetacean Acoustic Detection and Dive Interval Studies (1601)
Entry ID: seamap217

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Abstract: This study was conducted by the NOAA Southwest Fisheries Science
Center primarily in the southern Gulf of California aboard NOAA research ship
McArthur from early September to early November 1995 for a total of
approximately 6,000 kilometers surveyed. The project focused on two potential
approaches to improve abundance estimates of long-diving whales: (1) acoustic
detection of diving animals, and (2) collecting dive interval data on those
species to serve as a basis for a model-based abundance correction factor. This
dataset provides the time-date and geographical coordinates, by species/stock,
of all cetaceans detected during the survey, as well as the daily and
intra-daily start and end points of the line-transect survey.

Purpose: The primary purpose of this research was to learn how to better
estimate the abundance of long-diving whales during ship line-transect surveys.
These whale species, including beaked whales and dwarf and pygmy sperm whales,
dive for such long periods of time that there is a high probability that they
will never surface within the visual range of observers searching from a moving
survey vessel with 25X binoculars.


Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
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Description: Access data from the OBIS and OBIS-SEAMAP websites.
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Caption:  Cetacean Studies
Geographic Coverage
Spatial coordinates   
  N: 32.24   S: 20.5   E: -105.3   W: -117.39

Data Set Citation
Dataset Originator/Creator: NOAA Southwest Fisheries Science Center (SWFSC)
Dataset Title: SWFSC Cetacean Acoustic Detection and Dive Interval Studies (1601)
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2004-09-16 16:05:15.243998-04
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital data
Online Resource: http://swfsc.noaa.gov/
Parent DIF
This data set description is a member of a collection. The collection is described in

Temporal Coverage
Start Date: 1995-09-06
Stop Date: 1995-11-07
Data Resolution
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
SHIPS Ancillary Description
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: http://seamap.env.duke.edu/

Data Center Personnel
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 Format: Shapefile
Phone: 919-613-8021
Fax: 919-684-8741
Email: efujioka at duke.edu
Contact Address:
Box 90328
City: Durham
Province or State: NC
Postal Code: 27708
Country: USA
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Barlow, Jay, Karin A. Forney, A.V. Saunder, J. Urban-Ramirez. A Report of
Cetacean Acoustic Detection and Dive Interval Studies (Caddis) Conducted in the
Southern Gulf of California, 1995. 1997. NOAA-TM-NMFS-SWFSC-250.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-04-11
Last DIF Revision Date: 2014-03-13
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