Oct 31 2023
“Ghosting” in the Animal Kingdom
Turns out rejection is just as hard in the animal kingdom as in real life. Female frogs in particular have developed clever strategies to escape the relentless advances of male frogs during the mating season. A recent study published in the journal Royal Society Open Science reveals their tactics, which include evasive maneuvers and even faking their own deaths to avoid mating.
Carolin Dittrich, a postdoctoral researcher at the Konrad Lorenz Institute of Ethology in Vienna, discovered the phenomenon while studying European frogs’ mating habits. These frogs typically lead solitary lives, except during the two-week period in spring when they gather for an intense mating event known as explosive breeding.
Male frogs may sometimes grab onto a female already with a partner or multiple partners, creating a chaotic and potentially dangerous “mating ball.” While researching, Dr. Dittrich observed female frogs faking death during mating encounters. These frogs would go limp, splay their limbs out, and appear lifeless when a male grabbed them. After a few minutes, the male would give up and move on, at which point the “dead” female would revive and swim away. Approximately one-third of the females employed this tactic.
The female frogs also rolled in the water to shake off their male suitors and mimicked the calls males make when grabbed by other males to divert attention away from themselves.
The strategies proved effective, with 25 out of 54 females successfully escaping their persistent suitors. These findings challenge the perception that female frogs are passive in breeding events. Furthermore, the research dispelled the notion that male frogs use body size as a criterion for mate selection, as they seem to “grab whatever they can” in their frantic pursuit of mating partners.