LYCOS RETRIEVER 
Dolphins (Ecotourism)
built 177 days ago
Dolphins (Ecotourism) also shows up in the Retriever categories:
Dolphins (Movie) , and more.
Dolphins (Movie) , and more.
When chased by a speedboat, Dolphins have been clocked at speeds of 26.3 km/hr, which they maintained for about 1500 meters, leaping constantly. Energetic studies have shown, that the most efficient travelling speed for Dolphins is between6.0 - 8.2 km/hr. There have been reports of Dolphins travelling at much higher speeds, but these refer to Dolphins being pushed along by the bow wave of a speeding boat. They were getting a free ride. It is possible that Dolphins can reach speeds over 15 knots during very short bursts (like in preparation for a high jump), but they can't maintain that speed.
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Dolphins are in great threat from a wide variety of objects and actions within the water. Dolphins and other marine life often get caught up in fishing lines, and have difficulty with Stainless Steel hooks caught in their mouths. Rubbish and other waste products can ... be swallowed by Dolphins, causing pain. They also often have difficulty getting out of the way of speed boats and jet skis.
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Dolphins have a disproportionately large horizontal tail, known as a fluke. The flukes contain no bones and are mostly made up of connective and muscular tissues, forming a tough assemblage of muscles and fiber. Tendons of the muscles in the flukes are so developed that even the most violent muscular activity will not break the spinal column.
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This prompted speculation that Dolphins had their own language and might even have individual “names”. However, the theory was controversial among whale and Dolphin researchers, and until now, there had been no means of testing it.
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Dolphins once were hunted commercially, especially for the small quantity of valuable oil extracted from parts of the head and used to lubricate delicate watch mechanisms. Cheaper oils have now been found from other sources, and dolphins are no longer hunted for this reason. Many dolphins... become accidentally trapped and drowned in tuna nets; between 1959 and 1972 an estimated 4.8 million dolphins died in this way. Under pressure from animal rights activists and United States consumers, both domestic and international tuna canners have refused to accept shipments from fishing fleets that do not protect dolphins. Concern has also been expressed about the treatment of dolphins on display in public aquariums and in "swim with the dolphins" programs. The Marine Mammal Protection Act of 1972, amended in 1988 and 1992, was passed to prevent exploitation of dolphins and related aquatic animals.
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Most Dolphins live in the ocean and the ocean water is too salty for them to drink. If they would drink sea water, they would actually use more water trying to get rid of the salt than they drank in the first place. Most of their water they get from their food (fish and squid). Also, when they metabolise (burn) their fat, water is released in the process. Their kidneys are ... adapted to retaining as much water as possible. Although they live in water, they have live as desert animals, since they have no direct source of drinkable water.
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Dolphins (Ecotourism)