News tagged with dolphins
Worm seeks worm: Researchers find chemical cues driving aggregation in nematodes
(PhysOrg.com) -- Scientists have long seen evidence of social behavior among many species of animals, both on the earth and in the sea. Dolphins frolic together, lions live in packs, and hornets construct ...
Jan 12, 2012 |
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New study finds dolphins produce sounds in a similar way to humans
(PhysOrg.com) -- It has long been thought that dolphins produce sounds by means of "whistles," but a new analysis of a data gathered in the late 1970s has revealed that instead, dolphins make sounds by means ...
Sep 09, 2011 |
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Elephants are quick learners, offer helping hand
Elephants quickly learn to lend each other a helping hand - ah, make that a helping trunk.
Mar 07, 2011 |
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Scientists say dolphins should be treated as non-human persons
(PhysOrg.com) -- Scientists studying dolphin behavior have suggested they could be the most intelligent creatures on Earth after humans, saying the size of their brains in relation to body size is larger than ...
Jan 06, 2010 |
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Dolphins maintain round-the-clock visual vigilance
Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine Mammal Program explains that they are able to send half of their brains to sleep while the other half remains ...
May 01, 2009 |
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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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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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Dolphin whistles are unfit for porpoise
Bottlenose dolphins have whistles which they use to exclusively greet other members of their species, marine biologists in Scotland reported on Wednesday.
Feb 29, 2012 |
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Rare Chinese white dolphin gets DNA bank
A Hong Kong conservation group said Saturday it has set up a DNA bank for the rare Chinese white dolphin, also known as the pink dolphin, in a bid to save the mammals facing a sharp population decline.
Jan 15, 2012 |
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The Ichthyosaurs survived longer than was thought
(PhysOrg.com) -- The discovery of a new species of ichthyosaurs considerably changes our understanding of the evolution and the extinction of these dinosaur age sea reptiles, according to a study published ...
Other Sciences / Archaeology & Fossils
Jan 05, 2012 |
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Pregnancy is a drag for bottlenose dolphins
Lumbering around during the final weeks before delivery is tough for any pregnant mum. Most females adjust their movements to compensate for the extreme physical changes that accompany the later stages of ...
Nov 24, 2011 |
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Go fish! Scientist trains goldfish for object perception research (w/ video)
The fictitious storybook character Dr. Doolittle was known for talking with animals.
Oct 25, 2011 |
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Researcher discovers male bottlenose dolphins using social network to secure a mate
(PhysOrg.com) -- Marine biologist Jo Wiszniewski has observed a fascinating approach to mating among the Port Stephens Indo-Pacific bottlenose dolphins.
Oct 25, 2011 |
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New dolphin species discovered in Australia
Researchers in Australia have discovered that dolphin colonies living around Melbourne are a species unlike any other in the world, they revealed on Thursday.
Sep 15, 2011 |
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Ingenious fishing method may be spreading through dolphins
(PhysOrg.com) -- Researchers from Murdoch University believe a recently documented method of fishing may be spreading throughout a population of dolphins.
Aug 24, 2011 |
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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.
For more information about Dolphin, read the full article at
Wikipedia.
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