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Dolphins and Whales News -- ScienceDaily

Climate change is a threat to dolphins' survival - An unprecedented marine heatwave had long-lasting negative impacts on both survival and birth rates on the iconic dolphin population in Shark Bay, Western Australia. Researchers have now documented that climate change may have more far-reaching consequences for the conservation of marine mammals than previously thought.
Deep time tracking devices: Fossil barnacles reveal prehistoric whale migrations - Long-distance migrations are common for large whales, but when in their evolutionary past did whales begin to migrate and why? Scientists looked for these answers in fossil whale barnacles.
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.