ON SEX-SPECIFIC DISPERSAL AND MATING TACTICS IN THE COMMON EIDER SOMATERIA MOLLISSIMA AS INFERRED FROM THE GENETIC STRUCTURE OF BREEDING COLONIES

AbstractThe common eider is a colony breeding seaduck with extreme female philopatry. Molecular genetic techniques (mtDNA sequencing and microsatellite analysis) were applied on Baltic eiders to infer sex-specific dispersal and mating tactics among breeding colonies with different seasonal migration...

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Bibliographic Details
Published in:Behaviour 1999, Vol.136 (9), p.1145-1155
Main Authors: Tiedemann, Ralph, Von Kistowski, Kristin G, Noer, Henning
Format: Article
Language:English
Subjects:
Breeding
Evolutionary genetics
Gene flow
Genetic variation
Geographic origins
Haplotypes
Mating behavior
Microsatellites
Mitochondrial DNA
Molecular genetics
Somateria mollissima
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Summary:AbstractThe common eider is a colony breeding seaduck with extreme female philopatry. Molecular genetic techniques (mtDNA sequencing and microsatellite analysis) were applied on Baltic eiders to infer sex-specific dispersal and mating tactics among breeding colonies with different seasonal migration behaviour, i.e. sedentary, short distance migratory, and long distance migratory. MtDNA patterns show pronounced differentiation among colonies in maternally inherited traits. The estimated number of exchanged females per generation was 1.0-1.4. Smaller colonies showed a lower level of genetic variation in mtDNA. Microsatellite patterns suggest male-mediated gene flow to be sufficient for preventing inbreeding even in smaller colonies. However, though eiders of different geographic origin mix on wintering grounds, where mating occurs, mate choice is not random: The bias towards mates of similar geographic origin might reflect a different time of arrival at the wintering ground for eiders of different origin, together with the adaptive significance of early pair formation.
ISSN:0005-7959
1568-539X
DOI:10.1163/156853999501801