News tagged with dolphins
Dolphins learn from each other to beg for food from humans
(Phys.org) -- Dolphins may learn harmful or undesirable behaviors, such as begging for food from humans, from each other, Murdoch University researchers have discovered.
May 28, 2012 |
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Mercury in dolphins: Study compares toxin levels in captive and wild sea mammals
Amid growing concerns about the spread of harmful mercury in plants and animals, a new study by researchers from The Johns Hopkins University and The National Aquarium has compared levels of the chemical in ...
May 21, 2012 |
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Navy study: Sonar, blasts might hurt more sea life
(AP) -- The U.S. Navy may hurt more dolphins and whales by using sonar and explosives in Hawaii and California under a more thorough analysis that reflects new research and covers naval activities in a wider ...
May 11, 2012 |
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Healthcare for the US Navy's animal warriors could help people stay healthier
Military patrol dogs with your keen sense of smell, step aside. The U.S. Navy has enlisted the biological sonar and other abilities of bottlenose dolphins and California sea lions to protect harbors from enemy swimmers, detect ...
May 09, 2012 |
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World?s most northerly bottlenose dolphin population stable, report concludes
The world's most northerly resident population of bottlenose dolphins is stable and may even be increasing, according to new research.
May 02, 2012 |
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Japan 'Cove' town plans dolphin park
The dolphin-hunting Japanese town of Taiji, made infamous by the Oscar-winning documentary "The Cove", plans to open a marine mammal park where visitors can swim with the creatures, a media report said.
May 01, 2012 |
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Calif. rescuers hope dolphin finds way back to sea
(AP) -- A wayward dolphin that has spent two days in a narrow wetlands channel along the southern California coast was on its way out to the ocean Saturday when it suddenly turned tail and swam back to shallow ...
Apr 29, 2012 |
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Official: Dolphin deaths in Peru still a mystery
(AP) -- Peruvian authorities are still trying to unravel the mystery of why hundreds of dolphins ended up dead on beaches in the country over the past 2 1/2 months.
Apr 21, 2012 |
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Peru investigates deaths of almost 900 dolphins
Officials in Peru said Thursday they are investigating what caused the deaths of nearly 900 dolphins that have washed up on its northern coast over the past four months.
Apr 19, 2012 |
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Agency stops seismic tests; worries about dolphins
(AP) -- With sick and dead dolphins turning up along Louisiana's coast, federal regulators are curbing an oil and natural gas exploration company from doing seismic tests known to disturb marine mammals.
Apr 02, 2012 |
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Male dolphins build complex teams for social success
(PhysOrg.com) -- Male dolphins not only form a series of complex alliances based on their close relatives and friends but these alliances also form a shifting mosaic of overlapping geographic ranges within ...
Mar 28, 2012 |
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Size matters: Large Marine Protected Areas work for dolphins
Ecologists in New Zealand have shown for the first time that Marine Protected Areas – long advocated as a way of protecting threatened marine mammals – actually work. Their study, based on 21 years' ...
Mar 27, 2012 |
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Study shows some Gulf dolphins severely ill
Bottlenose dolphins in Barataria Bay, Louisiana, are showing signs of severe ill health, according to NOAA marine mammal biologists and their local, state, federal and other research partners.
Mar 26, 2012 |
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CITES seeks tougher limits on coral, shark, dolphin trade
UN wildlife trade regulator CITES said Wednesday that tougher limits should be imposed on trade of aquatic species such as corals, dolphins and sturgeons to protect them from extinction.
Mar 22, 2012 |
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Southern link offers hope for critically endangered Maui's dolphins
There are estimated to be just 55 adult and juvenile Maui’s dolphins according to a joint study by The University of Auckland, Department of Conservation and Oregon State University. With appropriate protections, however, ...
Mar 14, 2012 |
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Dolphin
Dolphins are marine mammals that are closely related to whales and porpoises. There are almost forty species of dolphin in seventeen genera. They vary in size from 1.2 m (4 ft) and 40 kg (90 lb) (Maui's Dolphin), up to 9.5 m (30 ft) and 10 tonnes (9.8 LT; 11 ST) (the Orca or Killer Whale). They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating fish and squid. The family Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about ten million years ago, during the Miocene. Dolphins are considered to be amongst the most intelligent of animals and their often friendly appearance and seemingly playful attitude have made them popular in human culture.
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