Age-dependent genetic structure of arctic foxes in Svalbard

被引:0
作者
Dorothée Ehrich
Lindsey Carmichael
Eva Fuglei
机构
[1] University of Tromsø,Department of Arctic and Marine Biology
[2] University of Alberta,Department of Biological Sciences
[3] Norwegian Polar Institute,undefined
来源
Polar Biology | 2012年 / 35卷
关键词
Kin structure; Age structure; Relatedness; Dispersal; Harvesting;
D O I
暂无
中图分类号
学科分类号
摘要
Arctic foxes are highly mobile arctic predators with a very weak population genetic structure over large parts of their range. Less is, however, known about the more local genetic structure within regions. Here, we analyze genotypes at 12 microsatellite loci for 561 arctic foxes trapped in the high-arctic archipelago Svalbard and investigate the genetic structure in three different age classes. Significant linkage disequilibrium, deficit of heterozygotes, genetic differentiation, and a decrease in relatedness with distance among animals trapped in their first winter suggested that some litter mates remain in proximity of each other during the first winter. This pattern was stronger for females than for males, indicating male-biased juvenile dispersal, and weaker for older animals. There was no genetic differentiation among adult foxes harvested in different hunting areas. The foxes from the protected area around Hornsund were however more differentiated than expected based on geographic distance alone, suggesting a possible disrupting effect of harvest on the spatial genetic structure in the rest of Svalbard. Our results also indicated a possible kin structure among adult females, suggesting natal philopatry, but further investigations will be needed to reach firm conclusions concerning kin structure in arctic foxes.
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页码:53 / 62
页数:9
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