Seasonal migrations, body temperature fluctuations, and infection dynamics in adult amphibians

PeerJ
David R DaversaJaime Bosch

Abstract

Risks of parasitism vary over time, with infection prevalence often fluctuating with seasonal changes in the annual cycle. Identifying the biological mechanisms underlying seasonality in infection can enable better prediction and prevention of future infection peaks. Obtaining longitudinal data on individual infections and traits across seasons throughout the annual cycle is perhaps the most effective means of achieving this aim, yet few studies have obtained such information for wildlife. Here, we tracked spiny common toads (Bufo spinosus) within and across annual cycles to assess seasonal variation in movement, body temperatures and infection from the fungal parasite, Batrachochytrium dendrobatidis (Bd). Across annual cycles, toads did not consistently sustain infections but instead gained and lost infections from year to year. Radio-tracking showed that infected toads lose infections during post-breeding migrations, and no toads contracted infection following migration, which may be one explanation for the inter-annual variability in Bd infections. We also found pronounced seasonal variation in toad body temperatures. Body temperatures approached 0 °C during winter hibernation but remained largely within the thermal toleranc...Continue Reading

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Citations

Jun 21, 2019·The Journal of Animal Ecology·Allison K ShawSandra A Binning
Mar 3, 2020·The Journal of Animal Ecology·Allison K Shaw, Sandra A Binning
Jun 13, 2019·Diseases of Aquatic Organisms·Karie A Altman, Thomas R Raffel
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Mar 5, 2021·Biological Reviews of the Cambridge Philosophical Society·Robert Poulin, Daniela de Angeli Dutra
Sep 16, 2021·Journal of Wildlife Diseases·David A Narváez-NarváezAlexander Genoy-Puerto

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Methods Mentioned

BETA
PCR

Software Mentioned

StatSoft
Eclo ExpressThermo
Statistica

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