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Our climate report highlights dramatic impacts on whales and dolphins

A new WDC report highlights the dramatic effect on whales and dolphins from climate change,...
© New England Aquarium and Canadian Whale Institute under DFO Canada SARA permit

Scientists unveil new names for 19 North Atlantic right whales

December 6, 2023 - Contact: Regina Asmutis-Silvia, Whale and Dolphin Conservation, (508) 451-3853, [email protected] Pam...
© Clearwater Marine Aquarium Research Institute, taken under NOAA permit #26919. Funded by United States Army Corps of Engineers

Birth announcement! First right whale calf of the 2024 calving season spotted

November 29, 2023 - On November 28th, researchers from the Clearwater Marine Aquarium Research Institute...
© Peter Flood

Two New England-based nonprofits awarded nearly $400k federal grant

© Peter Flood November 20, 2023 - Contact: Jake O'Neill, Conservation Law Foundation, (617) 850-1709,...

Early whales hearing similar to land animals

Whales and dolphins are renowned for their sensitive hearing but new research published in Current Biology suggests this was not always the case.

Using a CT scanner, scientists examined the fossils of two whales discovered during the last century in Togo, Africa. The whales were around 43-46 million years old, and while they lived in the sea, they still had legs which allowed them access to the land. Even though they would have been feeding on fish, they had not yet developed the ability to echolocate, used by modern-day toothed whales and dolphins.

Examination of their inner ears indicates these early whales could not yet pick up the extremes of high or low frequency sounds their descendants can. The separation into toothed and baleen whales occured around 35 million years ago and while it seems likely their specialised hearing evolved after this, the scientists have not ruled the possibility of discovering a common ancestor with highly developed hearing.

M. Mourlam and M. Orliac. Infrasonic and Ultrasonic Hearing Evolved after the Emergence of Modern Whales. Current Biology. Published online June 8, 2017. doi: 10.1016/j.cub.2017.04.061.