[Keyword='res marins']
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SWFSC Cetacean Acoustic Detection and Dive Interval Studies (1601)
Entry ID:
seamap217
Summary
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. CURRENTNESS REFERENCE: ground condition SPATIAL REFERENCE INFORMATION - GEODETIC MODEL Horizontal Datum Name: D_WGS_1984 Ellipsoid Name: WGS_1984 Semi-major Axis: 6378137.000000 Denominator of Flattening Ratio: 298.257224
Related URL
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.nmfs.noaa.gov/
Parent DIF
Temporal Coverage
Start Date:
1995-09-06
Stop Date:
1995-11-07
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
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
Data Center
Distribution
Distribution Format:
Shapefile
Personnel
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
Publications/References
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. Creation and Review Dates
DIF Creation Date:
2007-04-11
Last DIF Revision Date:
2008-01-13
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