In this case, respiration is automatic; a tail kick reflex keeps the blowhole above the water if necessary.  In some parts of the world, such as Taiji in Japan and the Faroe Islands, dolphins are traditionally considered food and are killed in harpoon or drive hunts. Whistle repertoire analysis of the short beaked Common Dolphin, "Dynamics of Dolphin Porpoising Revisited", "Bubble Ring Play of Bottlenose Dolphins (, Amazing footage of a dog playing with a dolphin off the coast of Ireland, "Apparently Dolphins in Australia Like to Get Stoned by Chewing on Toxic Blowfish", "Do Stoned Dolphins Give 'Puff Puff Pass' A Whole New Meaning? CS1 maint: multiple names: authors list (. The clicks are directional and are for echolocation, often occurring in a short series called a click train. , Bottlenose dolphins have been found to have signature whistles, a whistle that is unique to a specific individual. Pesticides, heavy metals, plastics, and other industrial and agricultural pollutants that do not disintegrate rapidly in the environment concentrate in predators such as dolphins. , Various species of dolphin have been known to engage in sexual behavior up to and including copulation with dolphins of other species.  Captivity usually bears little resemblance to wild habitat, and captive whales' social groups are foreign to those found in the wild. These ancient whales are the predecessors of modern whales, stretching back to their first ancestor that spent their lives near (rarely in) the water. Mahi-mahi are attracted to Sargassum, floating brown algae that serve as both a hiding place and source of food. The click rate increases when approaching an object of interest. They are distinguished by dazzling colors - golden on the sides, and bright blues and greens on the sides and back. Spawning can occur at body lengths of 20 cm (7.9 in). , Various species of dolphins are kept in captivity. , Organizations such as the Mote Marine Laboratory rescue and rehabilitate sick, wounded, stranded or orphaned dolphins while others, such as the Whale and Dolphin Conservation and Hong Kong Dolphin Conservation Society, work on dolphin conservation and welfare. Joe Raedle/Getty Images News/Getty Images, International Game Fish Association: Dolphinfish, Florida Museum of Natural History: Dolphinfish. Also widely called dorado (not to be confused with Salminus brasiliensis, a fresh water fish) and dolphin, it is one of two members of the family Coryphaenidae, the other being the pompano dolphinfish. Whereas apes can merely touch the mark on themselves with their fingers, cetaceans show less definitive behavior of self-awareness; they can only twist and turn themselves to observe the mark. Dolphins are sometimes hunted in places such as Japan, in an activity known as dolphin drive hunting. For thousands of years, Arctic people have depended on whale meat. Dolphin fish, though, are fish; they don't have wombs and they don't look like dolphins. Bottlenose dolphins are the most common species of dolphin kept in dolphinariums as they are relatively easy to train, have a long lifespan in captivity and have a friendly appearance. Sport fishermen seek them due to their beauty, size, food quality, and healthy population. Male dolphins are called "bulls", females "cows" and young dolphins are called "calves".  When playing with objects or small animals, common behavior includes carrying the object or animal along using various parts of the body, passing it along to other members of the group or taking it from another member, or throwing it out of the water. Because dolphins are generally associated in groups, communication is necessary. For instance, people on the tropical island of St. Vincent in the Caribbean can legally hunt and eat dolphins. As a result, this species sleeps in very short bursts which last between 4 and 60 seconds.  Dolphins send out high frequency clicks from an organ known as a melon. Now, they are sought by commercial fishermen on their own merits. , Queensland's shark culling program, which has killed roughly 50,000 sharks since 1962, has also killed thousands of dolphins as bycatch. , Archaeoceti is a parvorder comprising ancient whales. Phalanthus was another legendary character brought safely to shore (in Italy) on the back of a dolphin, according to Pausanias. But they share the same name and cause plenty of confusion. Fly-casters may especially seek frigatebirds to find big mahi-mahis, and then use a bait-and-switch technique. This is accomplished by driving a pod together with boats and usually into a bay or onto a beach. Mahi-mahi is not species of dolphin or even a relative of dolphins-- it is a water-breathing, ray-finned fish distantly releated to the perch.  They showed dolphins real-time footage of themselves, recorded footage, and another dolphin. In humans, the middle ear works as an impedance equalizer between the outside air's low impedance and the cochlear fluid's high impedance.
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