A group of tagged minke whales forage off the coast of the West Antarctic Peninsula.
Duke Marine Robotics and Remote Sensing. Taken under NMFS permit #23095.
Antarctic minke whales are elusive and hard to track – but a new study of their behaviour offers clues to their evolution and the limits of their filter-feeding behaviour.
Harbour porpoises are the most common toothed whale in the turbine-rich North Sea.
Onutancu/Shutterstock
Vera Weisbecker, Flinders University and Jeroen Smaers, Stony Brook University (The State University of New York)
Some animals, such as California sea lions, have small brains relative to their body size, but are still impressively intelligent, showing brain evolution is even more complex than it appears.
A humpback whale near the Antarctic ice.
Dr Olga Shpak
The cetacean brain has a specialised thermogenic system that helps the animal’s brain to produce enough heat to maintain a functional brain temperature.
The long tusk of the male narwhal earned these whales their fanciful nickname. But there’s more to these Arctic mammals than their unique spiral tooth.
Canada’s Parliamentary debate around captive whales and dolphins touched on the animals’ intellectual and social properties.
(Shutterstock)
As the field of animal law continues growing, so does public awareness of the problems with inconsistent ways that Canadian law protects some animals, while leaving others behind.
Researchers have found evidence of the same brain pathologies in dolphins that are present in the brains of humans who died with Alzheimer’s. What might this suggest about Alzheimer’s in humans?
A pod of spinner dolphins in the Red Sea.
Alexander Vasenin/wikimedia
As the vaquita porpoise heads towards extinction, new management measures in Mexico still may have missed the point – affecting not one but two critically endangered marine species.
Some dolphins live close to the shore, where they regularly encounter humans. This is affecting their numbers.
Simon Elwen
Globally, a quarter of whale and dolphin species are endangered. Though South African dolphin populations are generally in good heath, the humpback dolphin is cause for concern.