A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Artificial selection for predatory behaviour results in dietary niche differentiation in an omnivorous mammal (2022)

Hämäläinen, A., Kiljunen, M., Koskela, E., Koteja, P., Mappes, T., Rajala, M., & Tiainen, K. (2022). Artificial selection for predatory behaviour results in dietary niche differentiation in an omnivorous mammal. Proceedings of the Royal Society B : Biological Sciences, 289(1970), Article 20212510. https://doi.org/10.1098/rspb.2021.2510

JYU-tekijät tai -toimittajat

Kiljunen, Mikko
Koskela, Esa
Mappes, Tapio
Tiainen, Katariina

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Hämäläinen, Anni; Kiljunen, Mikko; Koskela, Esa; Koteja, Pawel; Mappes, Tapio; Rajala, Milla; Tiainen, Katariina

Lehti tai sarja: Proceedings of the Royal Society B : Biological Sciences

ISSN: 0962-8452

eISSN: 1471-2954

Julkaisuvuosi: 2022

Ilmestymispäivä: 09.03.2022

Volyymi: 289

Lehden numero: 1970

Artikkelinumero: 20212510

Kustantaja: The Royal Society

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1098/rspb.2021.2510

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/81991

Tiivistelmä

The diet of an individual is a result of the availability of dietary items and the individual's foraging skills and preferences. Behavioural differences may thus influence diet variation, but the evolvability of diet choice through behavioural evolution has not been studied. We used experimental evolution combined with a field enclosure experiment to test whether behavioural selection leads to dietary divergence. We analysed the individual dietary niche via stable isotope ratios of nitrogen (δ15N) and carbon (δ13C) in the hair of an omnivorous mammal, the bank vole, from four lines selected for predatory behaviour and four unselected control lines. Predatory voles had higher hair δ15N values than control voles, supporting our hypothesis that predatory voles would consume a higher trophic level diet (more animal versus plant foods). This difference was significant in the early but not the late summer season. The δ13C values also indicated a seasonal change in the consumed plant matter and a difference in food sources among selection lines in the early summer. These results imply that environmental factors interact with evolved behavioural tendencies to determine dietary niche heterogeneity. Behavioural selection thus has potential to contribute to the evolution of diet choice and ultimately the species' ecological niche breadth.

YSO-asiasanat: eläinten käyttäytyminen; ravinto; erikoistuminen; ekologinen lokero; isotooppianalyysi; metsämyyrä

Vapaat asiasanat: bank vole; diet choice; predatory behaviour; specialization; stable isotopes; trophic niche

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