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Dolphins and Whales News -- ScienceDaily

Review of noise impacts on marine mammals yields new policy recommendations - Marine mammals are particularly sensitive to noise pollution because they rely on sound for so many essential functions, including communication, navigation, finding food, and avoiding predators. An expert panel has now published a comprehensive assessment of the available science on how noise exposure affects hearing in marine mammals, providing scientific recommendations for noise exposure criteria that could have far-reaching regulatory implications.
Scientists find mystery killer whales off Cape Horn, Chile - In January 2019, scientists working off the tip of southern Chile got their first live look at what might be a new species of killer whale. Genetic samples will help determine whether this animal, with its distinctly different color pattern and body shape, is indeed new to science.
Male bottlenose dolphins form bachelor groups with their relatives - New research has analysed the behavior of 12 dolphin social groups in South Australia's Coffin Bay region and shows males who team up in groups of two to five to form beneficial alliances may have more success.
Migrating blue whales rely on memory more than environmental cues to find prey - Blue whales reach their massive size by relying on their exceptional memories to find historically productive feeding sites rather than responding in real time to emerging prey patches, a new study concludes.
Beaked whales' incredible diving abilities confirmed - A new study provides the first record of the diving behavior of Cuvier's beaked whales in US Atlantic waters. The species is Earth's deepest-diving mammal but spends very little recovery time at the surface. The new data, from 5,926 dives recorded off Cape Hatteras, N.C., shows them routinely diving more than a mile while holding their breath for over an hour. These whales push the limits of mammalian physiology.