Horizontal transmission of a murine retrovirus is driven by males within semi‐natural enclosures

Douglas H. Cornwall, James S. Ruff, Elizabeth R. Zachary, Chloe P. Young, Kathleen M. Maguire, Rachel J. Painter, Sophie M. Trujillo, Wayne K. Potts Pathogen life history is complex and consists of many challenges. One key challenge is transmitting from one host to another. The mode of transmission, or how a pathogen moves between hosts, helps determine both the likelihood of successful infection and the … Continue reading Horizontal transmission of a murine retrovirus is driven by males within semi‐natural enclosures

Free-ranging male and female American alligator (Alligator mississippiensis) in courtship (Credit: Kristen Zemaitis).

The immune costs of testosterone: can males break even?

Ezenwa, Vanessa; LaVere, Ashley; Hamlin, Heather; Lowers, Russell; Parrott, Benjamin When you think about animal courtship, you may picture an ostentatious male strutting around to impress a group of females, like a peacock displaying its tail feathers; or two males fighting for a female’s favor, like two rams butting heads to show their strength. Although elaborate displays and acts of aggression may help a male … Continue reading The immune costs of testosterone: can males break even?