Effects of Time of Sampling on Oocyst Detection and Effects of Age and Experimentally Elevated Testosterone on Prevalence of Coccidia in Male Dark-eyed Juncos

Hudman et al tested whether male Dark-eyed Juncos with experimentally elevated testosterone would be more likely to harbor coccidia, which are protozoan parasites that may cause the disease coccidiosis. Hudman et al found no evidence that treatment with testosterone or an individual's age affected the likelihood that it would harbor coccidia, and thus they found no evidence to support a tradeoff between reproduction and survival.