Winter temperature affects the prevalence of ticks in an Arctic seabird.

• Published in: PLoS ONE
• Main Author: Sébastien Descamps
• Format: Article in Journal/Newspaper
• Language: English
• Published: Public Library of Science (PLoS) 2013
• Subjects: Medicine; R; Science; Q; Arctic; Norway; Svalbard; brünnich's guillemot; Uria lomvia; uria
• Online Access: https://doi.org/10.1371/journal.pone.0065374; https://doaj.org/article/036f8c6b1a094cc6ba23659054127a1a

The Arctic is rapidly warming and host-parasite relationships may be modified by such environmental changes. Here, I showed that the average winter temperature in Svalbard, Arctic Norway, explained almost 90% of the average prevalence of ticks in an Arctic seabird, the Brünnich's guillemot Uria lomvia. An increase of 1°C in the average winter temperature at the nesting colony site was associated with a 5% increase in the number of birds infected by these ectoparasites in the subsequent breeding season. Guillemots were generally infested by only a few ticks (≤5) and I found no direct effect of tick presence on their body condition and breeding success. However, the strong effect of average winter temperature described here clearly indicates that tick-seabird relationships in the Arctic may be strongly affected by ongoing climate warming.