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Current Dolphins News and Events, Dolphins News Articles.
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The freediving champions of the dolphin world
New research explains how some populations of bottlenose dolphins can dive to almost 1,000 meters while avoiding decompression sickness. The new hypothesis suggests that lung architecture and the management of blood flow allow bottlenose dolphins to access oxygen in the lungs while preventing uptake of nitrogen which would cause the bends. The findings act as a starting point to understand how environmental changes and anthropogenic interaction may impact the future of the species. (2018-07-17)

Hearing tests on wild whales
Scientists published the first hearing tests on a wild population of healthy marine mammals. The tests on beluga whales in Bristol Bay, AK, revealed that the whales have sensitive hearing abilities and the number of animals that experienced extensive hearing losses was far less than what scientists had anticipated. (2018-06-20)

Threatened whales and dolphins recognize predatory killer whales from their alarming calls
Some killer whales prey on aquatic mammals while others, which prey on fish alone, pose on threat; so how do aquatic mammals know when they are at risk from killer whales? A new study shows that pilot whales and Risso's dolphins flea from a subset of orca calls that have many of the acoustic characteristics of mammal alarm calls, including human screams, which could warn them that the predators intend to strike. (2018-06-12)

Dolphins deliberately killed for use as bait in global fisheries
Ahead of World Oceans Day, new research exposes the practice of killing of aquatic mammals, including some listed as endangered, for the express purpose of securing bait for global fisheries. The practice is widespread globally, but most common in Latin America and Asia. The study reveals there is little information on the impact of this harvesting on targeted mammal populations and urges increased monitoring. (2018-06-07)

In male dolphin alliances, 'everybody knows your name'
It's not uncommon in dolphin society for males to form long-lasting alliances with other males, sometimes for decades. Now, after studying bottlenose dolphins in Shark Bay, Australia, for more than 30 years, researchers reporting in Current Biology on June 7 find that these males retain individual vocal labels rather than sharing a common call with their cooperative partners. (2018-06-07)

Study of sleeping fur seals provides insight into the function of REM sleep
All land mammals and birds have two types of sleep: rapid eye movement (REM) and non-REM (also called slow-wave sleep). Earlier evidence had suggested that REM sleep is essential for physical and mental well-being and learning, but the underlying function of REM sleep has been a mystery. Now researchers reporting in Current Biology on June 7 have new insight into the function of REM sleep, based on studies of an unlikely animal: the fur seal. (2018-06-07)

Individual 'names' reveal complex relationships in male bottlenose dolphins
Male bottlenose dolphins retain their individual 'names' well into adulthood. Similar to humans, this plays a central role in forming and maintaining complex social relationships, recent findings carried out by researchers at the universities of Zurich and Western Australia suggest. Dolphins form long-lasting alliances in which they give each other mutual support. (2018-06-07)

Honey bees can zero in on the advanced concept of zero
The honey bee has joined the ranks of dolphins, parrots, primates and preschool children, in demonstrating the ability to distinguish zero on the numerical spectrum. (2018-06-07)

Dolphin algorithm could lead to better medical ultrasounds
Millions of years of evolutionary fine-tuning have made dolphins phenomenally good at using echolocation to orient themselves, find food and communicate with one another. But how do they actually do it? New research from Lund University in Sweden shows that they emit two intertwined ultrasound beam components at different frequencies -- and with slightly different timing. (2018-05-31)

New tool improves fishing efficiency and sustainability
New software targets most abundant fishing grounds and reduces catch of unwanted or protected species using satellite data, maps and observations. (2018-05-30)

New study investigates dolphin liberation in Korea
A international team of researchers, affiliated with South Korea's Ulsan National Institute of Science and Technology (UNIST) has carried out a scientific investigation on dolphin liberation in South Korea. (2018-05-27)

Diverse and abundant megafauna documented at new Atlantic US Marine National Monument
Airborne marine biologists were dazzled by the diversity and abundance of large, unusual and sometimes endangered marine wildlife on a recent trip to the Northeast Canyons and Seamounts National Marine Monument, about 150 miles southeast of Cape Cod. (2018-05-16)

Mapping movements of ocean creatures great and small
Big data shows that large marine vertebrates move differently, but consistently, through coastal and ocean waters. (2018-05-13)

Smart skin for flexible monitoring
An electronic tag that stretches and flexes while it records location and environmental data can monitor marine animals in their natural habitat. (2018-05-03)

River dolphins are declining steeply in the Amazon basin
Populations of freshwater dolphins in the Amazon basin are in steep decline, dropping by half about every decade at current rates, according to a study published May 2, 2018, in the open-access journal PLOS ONE by Vera da Silva from Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil, and colleagues. (2018-05-02)

Baby fish led astray by high CO2 in oceans
Baby fish will find it harder to reach secure shelters in future acidified oceans -- putting fish populations at risk, new research from the University of Adelaide has concluded. (2018-04-11)

UEA research paints underwater pictures with sound
Silent marine robots that record sounds underwater are allowing researchers to listen to the oceans as never before. While pilot whales make whistles, buzzes and clicks, pods of hunting dolphins create high-pitched echolocation clicks and larger species such as sperm whales make louder, slower clicks. As well as eavesdropping on marine life, the recordings can be used to measure sea-surface wind speed and monitor storms. The research will be presented at the General Assembly of the European Geosciences Union, Vienna. (2018-04-10)

Dolphins tear up nets as fish numbers fall
Fishing nets suffer six times more damage when dolphins are around - and overfishing is forcing dolphins and fishermen ever closer together, new research shows. (2018-03-29)

Themed issue lays foundation for emerging field of collective movement ecology
Collective movement is one of the great natural wonders on Earth and has long captured our imaginations. But there's a lot we don't understand about how collective movement drives -- and is driven by -- broader ecological and evolutionary processes. A special themed issue gathers contributions from a range of researchers working in the emerging field of collective movement ecology, which is poised to dive into some of these outstanding questions. (2018-03-26)

Marine charities net more than iconic fishery: Massachusetts
Massachusetts boasts one of the most iconic fisheries in the US, but new research suggests that protecting marine coastlines has surpassed commercial fishing as an economic driver. The study is the first to calculate the economic value of coastal preservation in Massachusetts. The research finds these efforts contributed $179 million to the state's economy in 2014, more than finfish landings ($105 million) and whale-watching ($111 million). (2018-03-08)

Guidelines needed for use of therapy animals in mental health treatment
Therapy animals are used in the treatment of both mental and physical health issues, however this important form of therapy is not regulated, which leaves it open to misuse and misunderstanding by those who deliver it and the wider community. (2018-03-07)

No-fishing zones help endangered penguins
Small no-fishing zones around colonies of African penguins can help this struggling species, new research shows. (2018-01-16)

West African dolphin now listed as one of Africa's rarest mammals
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, according to WCS (Wildlife Conservation Society) and the IUCN's (International Union for Conservation of Nature) Cetacean Specialist Group. (2017-12-21)

Boat traffic threatens the survival of Panama's Bocas Del Toro dolphins
Bottlenose dolphins in Panama's Bocas Del Toro Archipelago should be designated as endangered say the authors of a new study. Biologists working at the Smithsonian Tropical Research Institute 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. (2017-12-21)

New ancient dolphin species Urkudelphis chawpipacha discovered in Ecuador
A new dolphin species likely from the Oligocene was discovered and described in Ecuador, according to a study published Dec. 20, 2017 in the open-access journal PLOS ONE by Yoshihiro Tanaka from the Osaka Museum of Natural History, Japan, and colleagues. (2017-12-20)

Dolphin and bear studies have paved the way to improved population forecasting
A new article by a UNSW Sydney-led team challenges the validity of current methods for forecasting the persistence of slow-growing species for conservation purposes, and provides a better approach to reducing the threat of extinction. (2017-12-10)

New algorithm recognizes distinct dolphin clicks in underwater recordings
Scientists have developed a new algorithm that can identify distinct dolphin click patterns among millions of clicks in recordings of wild dolphins. This approach, presented in PLOS Computational Biology by Kaitlin Frasier of Scripps Institution of Oceanography, California, and colleagues, could potentially help distinguish between dolphin species in the wild. (2017-12-07)

Heart monitors on wild narwhals reveal alarming responses to stress
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. (2017-12-07)

Virtual reality makes journalism immersive, realism makes it credible
Virtual reality technology may help journalists pull an audience into their stories, but they should avoid being too flashy, or their credibility could suffer, according to a team of researchers. (2017-12-07)

Tsunami reveals human noise pollution in Hawaiian waters
Spinner dolphins in bays along Hawaii's Kona Coast are subjected to underwater sound levels more than 16 times louder than natural due to noise pollution from ecotourism, sonar exercises and other human activities in the bays, a Duke University-led study finds. A tsunami struck the islands' coastal waters during the study and temporarily halted most human activities there, providing scientists with a rare comparative glimpse into what the bays sound like without these disruptions. (2017-10-30)

Climate shifts shorten marine food chain off California
Environmental disturbances such as El Niño shake up the marine food web off Southern California, new research shows, countering conventional thinking that the hierarchy of who-eats-who in the ocean remains largely constant over time. (2017-10-19)

Dolphin diets suggest extreme changes in the ocean may shorten food chains
Extreme marine conditions like El Niño are associated with shorter food chain length in the California Current ecosystem, a new analysis reports. The finding counters previous evidence for long-term stability and ecosystem resilience in nitrogen cycling and food web structure off the (2017-10-18)

Whales and dolphins have rich 'human-like' cultures and societies
Whales and dolphins (cetaceans) live in tightly-knit social groups, have complex relationships, talk to each other and even have regional dialects -- much like human societies. A major new study, published today in Nature Ecology & Evolution, has linked the complexity of Cetacean culture and behavior to the size of their brains. (2017-10-16)

Scientists discover species of dolphin that existed along South Carolina coast
Continuing to uncover fossil evidence along the coast of South Carolina, researchers, led by a faculty member at College of Charleston, have discovered a species of extinct dolphin. (2017-08-23)

Studies reveal worrisome trend for health of wild dolphins
Twelve years of data on the health of two Atlantic bottlenose dolphin populations paints a grim reality concerning the wellbeing of the Atlantic Ocean. The research compiles findings from Georgia Aquarium, Harbor Branch Oceanographic Institution at Florida Atlantic University and contributing partners as part of the Health and Environmental Risk Assessment Project (HERA) from 2003-2015. It informs researchers about the health of dolphins and prompted additional studies on how the environment may impact human health. (2017-08-23)

A dolphin diet
The health of dolphin populations worldwide depends on sustained access to robust food sources. (2017-08-02)

How dolphins inspired a potentially life-saving method for treating trauma victims
University at Buffalo researchers have successfully tested face cooling to prevent steep drops in blood pressure during simulated blood loss, a prehospital intervention that EMTs and battlefield medics could one day use to save lives. (2017-07-17)

Undersea robot reveals 'schools' of animals in deep scattering layers
Throughout the world ocean, animals congregate at certain depths. A new paper in Limnology and Oceanography shows that, rather than consisting of a random mixture of animals, these deep-scattering layers contain discrete groups of squids, fishes, and crustaceans. (2017-07-10)

A twist in the tail: Flying fish give clues to 'tandem wing' airplane design
Ribbon halfbeak are a species of fish with the ability to fly above the sea surface -- but unlike true 'flying fish', they lack the necessary hind wing fins. So how do they fly? Dr. Yoshinobu Inada from Tokai University, Japan says, 'Investigating the design of ribbon halfbeak could provide useful information for the optimal design of tandem wing airplanes.' (2017-07-04)

Extinct early whales listened like their relatives on land, fossil evidence shows
Whales show surprisingly vast differences in hearing ability. Baleen whales tune into infrasonic sounds to communicate over long distances. Toothed whales do just the opposite, relying on ultrasonic frequencies too high for humans to hear. Now researchers reporting in Current Biology on June 8 have fossil evidence from extinct early whale species to suggest that those differences in hearing arose only after whales evolved into the fully aquatic animals we know today. (2017-06-08)

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