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Repeated breaches tire the animal, so less of the body clears the water each time. [9] Ultimately, the reasons for breaching are unknown; however, there is evidence to support a range of hypotheses. Whales are more likely to breach when they are in groups, suggesting that it is a non-verbal signal to other group members during social behaviour.
It might be that killer whales have learned to stay away from shallow waters, and that heading to the shallows offers the smaller animals some protection from predators. However, killer whales in Península Valdés , Argentina, and the Crozet Islands in the Indian Ocean have learned how to operate in shallow waters, particularly in their ...
The family of beaked whales includes some very cryptic and inaccessible animals, and they are considered to be deep-diving foragers mainly based on stomach contents. Tagging studies by Hooker and Baird, (1999) show that the northern bottlenose whale , Hyperoodon ampullatus , is capable of diving to depths more than 1500 m with durations of over ...
The mystery as to why a beluga whale appeared off the coast of Norway wearing a harness may finally have been solved. The tame white whale, which locals named Hvaldimir, made headlines five years ...
Whales, dolphins used since the Cold War The use of marine animals for military purposes traces back to the Cold War as both the U.S. and U.S.S.R. used dolphins to protect ships and harbors as ...
Research has recently shown that beaked and blue whales are sensitive to mid-frequency active sonar and move rapidly away from the source of the sonar, a response that disrupts their feeding and can cause mass strandings. [2] Some marine animals, such as whales and dolphins, use echolocation or "biosonar" systems to locate predators and prey.
A harness-wearing beluga whale that may have been trained by the Russian navy has reappeared off Sweden's coast.. The "spy" whale was first reported in April 2019, when he was discovered near ...
Sperm whales have the largest brain mass of any animal on Earth, averaging 8,000 cm 3 (490 in 3) and 7.8 kg (17 lb) in mature males. [23] The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. [24] In some whales, however, it is less than half that of humans: 0.9% versus 2.1%. [citation needed]