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A fine scale study finds limited evidence of kin clustering in a grey seal colony

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Author(s)

V. F. Poland, Patrick Pomeroy, S.D. Twiss, Jefferson Alden Graves

School/Research organisations

Abstract

Microsatellites were used to investigate fine-scale spatial and temporal genetic structure of a gray seal breeding colony, using samples collected throughout the colony (1997) and more extensive local sampling (2000-2002). Previous behavior of breeding seals on North Rona, including philopatry and high breeding site fidelity, suggested female kin may cluster together. However, low F-ST scores indicated no genetic differentiation between the major breeding aggregations in different regions of the colony. Nevertheless, the pairwise relatedness of mothers within regions was significantly higher than the relatedness of mothers between regions. Evidence of kin clustering occurred within one region in the colony. Within this region, mothers' pairwise relatedness decreased significantly with increasing distance between pupping sites. Pairwise relatedness of neighboring females within this region was also higher than expected. Conversely, in the other regions mothers that were considered likely to have social interactions, based on their spatial and temporal proximity, were not more related to each other than random. Therefore, sustained scale (> 500 m), but not at finer scales. This suggests that long-term associations of mothers on North Rona detected previously are unlikely to be formed solely by close kin.

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Details

Original languageEnglish
Pages (from-to)371-387
Number of pages17
JournalMarine Mammal Science
Volume24
Issue number2
Early online date21 Apr 2008
DOIs
Publication statusPublished - Apr 2008

    Research areas

  • Genetic structure, Microsatellites, Gray seal, Halichoerus grypus, Relatedness, Kin clustering

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