Reduced Fecundity in Wood Frogs due to Warmer Winters

by Anna Alquitela

From 2006 to 2012, Michael Benard conducted research at a field station in southeastern Michigan where he used drift fences and pitfall traps to capture both adult and metamorphosing wood frogs (Rana sylvatica) at six wetlands (Benard 2014). Benard’s goal was to determine if a relationship exists between date of breeding and winter temperature and precipitation, and between the female reproductive rate (fecundity) and winter temperature and precipitation. Using these data, he was also able to discern if breeding dates affect changes in metamorphosis timing, length of the larval period, weight at metamorphosis, and larval survival. Continue reading