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SMRU Grey Seal Tracking in the North Sea, 1991-1993
Entry ID: seamap71

Abstract: The movements of 14 grey seals Halichoerus grypus Fab. caught at the Farnes in north-east England (12) and Abertay in eastern Scotland (2) between August 1991 and July 1993 were investigated using Argos Satellite Relay Data Loggers (SRDL). The data are a spreadsheet of points representing seal locations. The low and irregular uplink rate from an SRDL on a seal to the Argos satellites can result in ... View entire text

Purpose: Grey seals Halichoerus grypus Fab. are large, numerous marine top predators. The British population in 1994 was estimated to be 108,000 individuals and it has been steadily increasing since. Fears concerning competition with fisheries have prompted calls for control measures under the UK Conservation of Seals Act 1970. However little is known about the areas where grey seals forage or of the ... 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: 62.35   S: 50.69   E: 3.95   W: -18.89

Data Set Citation
Dataset Originator/Creator: Sea Mammal Research Unit (SMRU)
Dataset Title: SMRU Grey Seal Tracking in the North Sea, 1991-1993
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2004-03-11 13:13:58.956105-05
Dataset Release Place:
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital data
Online Resource:
Parent DIF
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Temporal Coverage
Start Date: 1991-08-22
Stop Date: 1993-12-25
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 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.
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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Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2008-01-08
Last DIF Revision Date: 2018-02-16