The pit and other skull features suggest that the ancient toothed whale
sent calls out into the water to echolocate objects.
The researchers knew that some sounds get to the ears of a toothed whale
through a structure called the acoustic window.
Now, Danish researchers show that the biosonar of toothed whales
and bats share surprisingly many similarities - even though they live in very different environments and vary extremely in size.
eat animals such as penguins, seals, and large fish.
are deep divers that hunt for food using echolocation--they emit sounds that bounce off objects and return to the whale, giving a "picture" of the preys shape, size, and whereabouts.
Also, the frequency is too low to be heard well by most ocean echolocators--the dolphins and toothed whales
that use sound to navigate and find food.
Rather, this particular toothed whale
seems more closely related to the baleen whales, despite noticeable outward differences, they report in the Jan.
Washington, March 16 ( ANI ): Researchers have said that a fossilized whale skull found outside Charleston, South Carolina shows all the tell-tales signs that are related to echolocation in today's toothed whales
, dolphins, and porpoises.
The recent discovery was named "Papahu taitapu" and known as the first of its kind to have the closest relationship to modern dolphins and toothed whales
AUCKLAND (CyHAN)- New Zealand scientists said Wednesday have identified a previously unknown type of fossil dolphin that could be the ancestor of modern dolphins and toothed whales
The sperm whale is the largest of the toothed whales
Sea lions, fur seals, toothed whales
, and other marine mammals can get caught on the hooks or tangled in the lines.
To our knowledge, the only other example of a specialized sound-producing organ in mammals that is independent of the larynx are the phonic lips that toothed whales
use to generate echolocation clicks," Charlton says.
For decades, scientists have known that dolphins and other toothed whales
have specialized fats in their heads that efficiently convey sound waves from the ocean to their internal ears.
Adam Grogan, the RSPCA's senior scientific wildlife officer added: "Unfortunately scientific research from the results of post-mortems of beached toothed whales
has led vets to conclude that these species have little chance of survival after stranding and that the most humane course of action is euthanasia to prevent further suffering.