Category Archives: Animal Gate

‘Make like a bat’: Two ears attuned to high frequencies help people find objects using echoes

The ability that some people have to use echoes to determine the position of an otherwise silent object, in a similar way to bats and dolphins, requires good high-pitch hearing in both ears, according to new research. This builds on recent research that demonstrated conclusively that some sighted and blind people could use echoes in this way. What wasn’t clear until now was how important high-frequency hearing in both ears is.

Warm-blooded fishes swim faster and farther than cold-blooded counterparts

Marine scientists have long known that some species of fish possess a unique physiological characteristic — a web of arteries and veins lying very close together — that enables them to raise their internal temperatures higher than that of the water surrounding them. Now, a new study has demonstrated that species possessing the ability to warm their core — a process called endothermy — are able to swim two and a half times faster than those whose body temperature doesn’t change.

Solomon Islands dolphin hunts cast spotlight on small cetacean survival

A new study on the impact of ‘drive-hunting’ dolphins in the Solomon Islands is casting a spotlight on the increasing vulnerability of small cetaceans around the world. From 1976 to 2013, more than 15,000 dolphins were killed by villagers in Fanalei alone, where a single dolphin tooth can fetch the equivalent of 70 cents — an increase in value of five times just in the last decade.