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New government marine wildlife code to help reduce dolphin disturbance

The launch today by UK Government of new guidance on how to act responsibly around...

UK government to extend ivory ban to stop the sale of orca teeth

Following the UK ban on the import, export and dealing of elephant ivory in 2022,...

Dead whale beauty products to be sold in Japanese vending machine stores

Antarctic minke whale alongside Japanese whaling ship. Photo © Jeremy Sutton-Hibbert Japanese whale hunting company,...

Arrests made following illegal whale meat smuggling from Japan to South Korea

Customs authorities in Busan, South Korea, have arrested six people for allegedly smuggling at least...

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.

About George Berry

George is a member of WDC's Communications team and website coordinator.