European Directory of Marine Environmental Data (EDMED)

Data set information

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General
Data set name

Grey seals: pup production and population size (1960-1992)

Data holding centreSea Mammal Research Unit
CountryUnited Kingdom  United Kingdom
Time periodFrom 1960 to 1992 (annual surveys)
OngoingNo
Geographical area

Inner Hebrides, Outer Hebrides, Orkney, Isle of May, Loch Eriboll (i.e. all the main grey seal breeding sites in the UK)

Observations 
Parameters

Seal abundance; Seal reproduction; Seal behaviour; Seal mortality

Instruments

Cameras

Description 
Summary

Annual grey seal surveys are conducted during the breeding season, from late September through late November. During this time, all the main breeding colonies in Britain (in the Inner and Outer Hebrides, Orkney and the Isle of May) are photographed using an image motion compensated 5 inch format aerial camera mounted in the NERC aircraft. Each breeding site is photographed between 3 and 5 times over a six week period. Numbers of pups are counted from photographs using a microfiche reader. Pup production is derived from the distribution of these pup counts over the course of the breeding season. Numbers of adults are derived from pup production figures. Breeding colonies elsewhere on the UK are surveyed by local conservation groups at the Farnes, Wales and Donna Nook in Lincolnshire.

OriginatorsSea Mammal Research Unit
Availability 
OrganisationSea Mammal Research Unit
AvailabilityBy negotiation
ContactProf.. Mike Fedak
Address

Sea Mammal Research Unit
University of St Andrews Gatty Marine Laboratory
St Andrews
Fife
KY16 8LB
United Kingdom

Telephone+44 1223 311354
Emailm.fedak@smru.st-andrews.ac.uk
Administration 
Collating centreBritish Oceanographic Data Centre
Local identifier1055003
Global identifier760
Last revised2009-10-15