A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Out in the open : behavior’s effect on predation risk and thermoregulation by aposematic caterpillars (2020)

Nielsen, M. E., & Mappes, J. (2020). Out in the open : behavior’s effect on predation risk and thermoregulation by aposematic caterpillars. Behavioral Ecology, 31(4), 1031-1039. https://doi.org/10.1093/beheco/araa048

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Nielsen, Matthew E.; Mappes, Johanna

Lehti tai sarja: Behavioral Ecology

ISSN: 1045-2249

eISSN: 1465-7279

Julkaisuvuosi: 2020

Volyymi: 31

Lehden numero: 4

Artikkelin sivunumerot: 1031-1039

Kustantaja: Oxford University Press

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1093/beheco/araa048

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/69783

Tiivistelmä

Warning coloration should be under strong stabilizing selection but often displays considerable intraspecific variation. Opposing selection on color by predators and temperature is one potential explanation for this seeming paradox. Despite the importance of behavior for both predator avoidance and thermoregulation, its role in mediating selection by predators and temperature on warning coloration has received little attention. Wood tiger moth caterpillars, Arctia plantaginis, have aposematic coloration, an orange patch on the black body. The size of the orange patch varies considerably: individuals with larger patches are safer from predators, but having a small patch is beneficial in cool environments. We investigated microhabitat preference by these caterpillars and how it interacted with their coloration. We expected caterpillar behavior to reflect a balance between spending time exposed to maximize basking and spending time concealed to avoid detection by predators. Instead, we found that caterpillars preferred exposed locations regardless of their coloration. Whether caterpillars were exposed or concealed had a strong effect on both temperature and predation risk, but caterpillars in exposed locations were both much warmer and less likely to be attacked by a bird predator (great tits, Parus major). This shared optimum may explain why we observed so little variation in caterpillar behavior and demonstrates the important effects of behavior on multiple functions of coloration.

YSO-asiasanat: varoitusväri; eläinten käyttäytyminen; lämmönsäätely; saalistus; täpläsiilikäs; talitiainen

Vapaat asiasanat:  aposematism; Arctia plantaginis; color; microhabitat preference; Parus major; thermoregulation

Liittyvät organisaatiot

OKM-raportointi: Kyllä

VIRTA-lähetysvuosi: 2020

JUFO-taso: 2