Profiles

Malin Hasselgren

Malin Hasselgren

PhD student

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Works at Department of Zoology
Email malin.hasselgren@zoologi.su.se
Visiting address Svante Arrheniusväg 18 B
Room D 512
Postal address Zoologiska institutionen: Ekologi 106 91 Stockholm

Publications

A selection from Stockholm University publication database
  • 2018. Malin Hasselgren (et al.). Proceedings of the Royal Society of London. Biological Sciences 285 (1875)

    Isolation of small populations can reduce fitness through inbreeding depression and impede population growth. Outcrossing with only a few unrelated individuals can increase demographic and genetic viability substantially, but few studies have documented such genetic rescue in natural mammal populations. We investigate the effects of immigration in a subpopulation of the endangered Scandinavian arctic fox (Vulpes lagopus), founded by six individuals and isolated for 9 years at an extremely small population size. Based on a long-term pedigree (105 litters, 543 individuals) combined with individual fitness traits, we found evidence for genetic rescue. Natural immigration and gene flow of three outbred males in 2010 resulted in a reduction in population average inbreeding coefficient (f), from 0.14 to 0.08 within 5 years. Genetic rescue was further supported by 1.9 times higher juvenile survival and 1.3 times higher breeding success in immigrant first-generation offspring compared with inbred offspring. Five years after immigration, the population had more than doubled in size and allelic richness increased by 41%. This is one of few studies that has documented genetic rescue in a natural mammal population suffering from inbreeding depression and contributes to a growing body of data demonstrating the vital connection between genetics and individual fitness.

Show all publications by Malin Hasselgren at Stockholm University

Last updated: April 28, 2020

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