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Microsatellite variation in grey seals (Halichoerus grypus) shows evidence of genetic differentiation between two British breeding colonies
Although grey seals are known to range over very large areas outside the breeding season, site fidelity of adults and philopatry of pups for these breeding colonies must be sufficiently common to have effects, through genetic drift, at the sub‐population level. Expand
Philopatry, Site Fidelity and Local Kin Associations within Grey Seal Breeding Colonies
Grey seals born and marked by tagging and cohort brands at colonies on North Rona, Outer Hebrides and at the Isle of May, Firth of Forth since 1981 have shown philopatry, suggesting the possibility of highly related groups within colonies. Expand
Where have all the fathers gone? An extensive microsatellite analysis of paternity in the grey seal (Halichoerus grypus)
It is concluded that aquatic mating may play a much larger role in the grey seal than has previously been thought. Expand
Finding fathers: spatio‐temporal analysis of paternity assignment in grey seals (Halichoerus grypus)
The authors found little evidence of unidentified male strategies at North Rona, Scotland, whereas further examination of mechanisms of female choice may be productive, and nearly all paternities assigned agreed with expectation based upon detailed knowledge of the spatio‐temporal patterns of individuals during the breeding season. Expand
Dispersion and site fidelity of breeding male grey seals (Halichoevus grypus) on North Rona, Scotland
The daily locations of socially active male grey seals were recorded during three successive breeding seasons on North Rona (Outer Hebrides, Scotland). Areas of occupancy were defined for 38Expand
Male mating success and paternity in the grey seal, Halichoerus grypus: a study using DNA fingerprinting
Overall, DNA typed males were more dominant, maintained positions amongst the females for longer, and accounted for disproportionately more paternities than untyped males, however, the reproductive success of the typed males is not as great as their behavioural domination of copulatory opportunities would suggest. Expand
Evidence for Mate Fidelity in the Gray Seal
Genetic analysis of pups born on the island of North Rona, Scotland, reveals large numbers of full siblings, although dominant males father disproportionately few of these. Expand
Finescale topographical correlates of behavioural investment in offspring by female grey seals, Halichoerus grypus
Topographical influences on the behaviour of breeding female grey seals are examined by quantifying topography at a subseal size resolution using submetre resolution digital terrain models of two sites within a rocky breeding colony to compare observed differences in female behaviour. Expand
The impact of climatic variation on the opportunity for sexual selection
Evidence of a direct effect of local climatic variation on the intensity of sexual selection is provided, by showing a clear correlation between local weather conditions and inter-annual changes in the degree of polygamy in a long-term study of colonially breeding grey seals. Expand
Expansion of a grey seal ( Halichoerus grypus ) breeding colony: changes in pupping site use at the Isle of May, Scotland
Comparison with other colonies suggests that the spatial scale of site fidelity is related to the scale of topographic variation within the breeding site, which acts to limit local animal density. Expand