Communication is costly in Heaviside's Dolphins
Posted by: University of Pretoria
20 July 2018
Research led by scientists at the University of Pretoria (UP) has shed light on an evolutionary arms race with a twist. This research, conducted by Morgan J. Martin, a PhD student from UP has found that the small Heaviside’s dolphins (Cephalorhynchus heavisidii) selectively switch between cryptic, high frequency, echolocation sounds used to search for prey, and lower frequency communication sounds which help to maintain their highly social lifestyle. However, this switch may come at the risk of being heard by their key predator - killer whales (Orcinus orca).