Female Dolphins 'Remember' Aggressive Males

Female bottlenose dolphins possess a remarkable ability to identify and avoid aggressive males, relying on their unique signature whistles and memories of past interactions. New research suggests that reproductively available females actively track individual male behavior over time. They show a pronounced avoidance response to the calls of males known for more coercive mating tactics. This behavior highlights a complex social intelligence, allowing females to make informed decisions during mating seasons.

The study, conducted with Indo-Pacific bottlenose dolphins in Western Australia, observed that males often form alliances to herd females into "consortships," which can be physically demanding and disruptive. These mating events may involve aggressive behaviors like biting or charging, causing injury and lost foraging time for females. The findings underscore that female dolphins are not passive participants, but rather actively use information about male personalities to navigate these encounters and potentially choose partners for reproduction.