Journal
PARASITOLOGY RESEARCH
Volume 122, Issue 11, Pages 2599-2607Publisher
SPRINGER
DOI: 10.1007/s00436-023-07958-5
Keywords
Sex-biased parasitism; Ectoparasites; Ixodes ricinus; Siphonaptera; Apodemus; Small mammals
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This study investigated the presence and potential causes of sex bias in ectoparasite infestations in yellow-necked mice. The results showed that male mice had a higher tick burden compared to females, but this difference was driven by their body mass rather than their sex. Additionally, the abundance of ticks and fleas infesting yellow-necked mice varied over time.
We investigated the presence and potential causes of sex bias in ectoparasite infestations in the yellow-necked mouse Apodemus flavicollis. We compared the natural tick and flea burdens of male and female mice in a temperate beech forest and assessed whether the observed differences were driven by host sex or body mass. We found that males were more heavily infested by ticks compared to female mice. However, this difference was driven by host body mass, and not sex itself. Host body mass positively correlated with flea loads, but there was no evidence of sex bias in flea abundance. In addition, the abundance of both ticks and fleas infesting yellow-necked mice changed over time, both seasonally (month to month) and annually (year to year). Our results underscore the importance of the sexual size dimorphism and the parasite taxon as the primary factors that influence the occurrence of sex-biased parasitism in small mammals.
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