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Beluga whales dive deeper, longer to find food in Arctic

Tue, 20 Feb 2018 16:12:16 EST ~ Beluga whales that spend summers feeding in the Arctic are diving deeper and longer to find food than in earlier years, when sea ice covered more of the ocean for longer periods, according to a new analysis. Find out more...

Noise from ships scares porpoises

Tue, 20 Feb 2018 14:34:45 EST ~ Porpoises communicate with each other using sounds. Therefore, they are highly sensitive to noise, such as ship noise. A new study shows that porpoises flee from and stop feeding when disturbed by heavy ship noise. Find out more...

Monitoring bacteria on whale skin

Wed, 14 Feb 2018 14:58:05 EST ~ Just like with humans, the skin on marine mammals serves as an important line of defense against pathogens in their environment. A new study sheds light on the skin microbiome -- a group of microorganisms that live on skin -- in healthy humpback whales, which could aid in future efforts to monitor their health. Find out more...

Snapping shrimp may act as 'dinner bell' for gray whales off Oregon coast

Tue, 13 Feb 2018 12:04:43 EST ~ Scientists have for the first time captured the sounds of snapping shrimp off the Oregon coast and think the loud crackling from the snapping of their claws may serve as a dinner bell for eastern Pacific gray whales. Find out more...

Recordings spout secrets behind blue whale behavior

Mon, 12 Feb 2018 12:58:13 EST ~ Researchers are using underwater microphones to interpret and characterize the calls of blue whales swimming through Southern California's oceans, revealing new insights into the behavior of these endangered marine mammals. Find out more...

Ancient dolphin species Urkudelphis chawpipacha discovered in Ecuador

Fri, 22 Dec 2017 09:03:40 EST ~ An extinct dolphin species likely from the Oligocene has been discovered. The fossil is one of the few fossil dolphins from the equator, and is a reminder that Oligocene cetaceans may have ranged widely in tropical waters. Find out more...

West African dolphin now listed as one of Africa's rarest mammals

Fri, 22 Dec 2017 09:03:29 EST ~ A group of scientists now considers a little-known dolphin that only lives along the Atlantic coasts of Western Africa to be among the continent's most endangered mammals, a list that includes widely recognized species such as gorillas, African wild dogs, and black rhinos. Find out more...

Boat traffic threatens the survival of Panama's Bocas Del Toro dolphins

Fri, 22 Dec 2017 09:03:07 EST ~ Bottlenose dolphins in Panama's Bocas Del Toro Archipelago should be designated as endangered say the authors of a new study. Biologists have discovered that the roughly 80 dolphins in the archipelago do not interbreed with other Caribbean bottlenose dolphins. Their low numbers jeopardize their long-term survival, which is threatened by increasing local boat traffic that killed at least seven dolphins in 2012. Find out more...

New algorithm recognizes distinct dolphin clicks in underwater recordings

Thu, 07 Dec 2017 14:17:46 EST ~ Scientists have developed a new algorithm that can identify distinct dolphin click patterns among millions of clicks in recordings of wild dolphins. This approach could potentially help distinguish between dolphin species in the wild. Find out more...

Heart monitors on wild narwhals reveal alarming responses to stress

Thu, 07 Dec 2017 14:17:26 EST ~ Stress from human disturbances could cause behavioral responses in narwhals that are inconsistent with their physiological capacities, researchers say. They found that narwhals released after entanglement in nets and outfitted with heart monitors performed a series of deep dives, swimming hard to escape, while their heart rates dropped to unexpectedly low levels of three to four beats per minute. Find out more...