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A HEBRIDEAN BREEDING COLONY OF GREY SEALS, HALICHOERUS GRYPUS (FAB.), WITH COMPARATIVE NOTES ON THE GREY SEALS OF RAMSEY ISLAND, PEMBROKESHIRE
Author(s) -
Hewer H. R.
Publication year - 1957
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1096-3642.1957.tb00255.x
Subject(s) - geography , table (database) , population , welsh , terrain , fishery , archaeology , cartography , biology , demography , sociology , computer science , data mining
Summary. An account is given of the various phases of breeding behaviour of both cows and bulls on the island of Shillay, Outer Hebrides. Attention is drawn to unique features of combat between the bulls both before and after taking up territorial positions. The influence of the terrain available upon the behaviour of the seals of all ages is emphasised and comparisons made with other Scottish and Welsh colonies. An attempt is made to draw up a Life‐table compatible with the known vital statistics. The more serious gaps in our knowledge of the population dynamics of this species are noted.