Dolphins :: essays research papers

DolphinsDolphins ar mammals closely connect to whales and porpoises. Dolphins construct a powerful and streamlined body. They are found in all seas and oceans.Dolphins can be told apart from porpoises by their nose, which is beaklike, and in like manner their conical teeth. Porpoises have a flatter nose, sharper teeth, and amore secure body. in that location are 32 known species of dolphinfishs. The bottle-nosed dolphin isoften the species employ in aquatic shows. The common dolphin inspired manyMediterranean folk lores. Both of the dolphins above appear in open waters, comm that around cruise ships. They like to show off around the boat.There are also freshwater dolphins that live in rivers of Asia and SouthAmerica. The Buffeo dolphin has been spotted up to 1250 miles up he Amazon River.The buffeo is the modestest of all dolphins averaging almost 4 feet. Thebottlenose is closer to 10 feet. The killer whale, which is also considered adolphin, can grow to be 30 feet long. The pilot whale is also considered adolphin.Dolphins were at one time track down by commercial boats for the small amount of money ofoil that can be extracted from their body. This oil is used to lubricate smallparts in watches. Cheaper oils have been found, so dolphins are not hunted forthis reason anymore. Dolphins can be caught in tuna nets by accident. Sincedolphins have to breath at the surface they drown in tuna nets. It is estimatedthat 4.8 one million million million dolphins were killed in tuna nets from 1959 to 1972. Underpressure from animal rights activists tuna consumers go forth not accept tuna fromcanners that do not protect dolphins. animal(prenominal) rights activists also believe thatdolphins shouldnt be in captivity for use in aquatic shows.Dolphins eat a lot of food in a day, usually about one third of theirbody weight. A dolphins fodder consists of mostly fish and squid. Dolphins canswim very fast, so they are able to easily catch their food. The dolphin has 200to 250 sharp teeth. Dolphins go along schools of fish in groups. The Pacificwhite-sided species is estimated to travel in groups with tens of thousands ofmembers, while on the other hand bottlenose dolphins travel in groups thatcontain only a few members.Dolphin, like whales, breathe through a blowhole in the top of theirhead. While traveling dolphins break the surface once every two minutes. Whendolphins exhale water is sometimes thrown from the blowhole. afterwards exhaling thedolphins inhale and disappear into the ocean. A dolphins lungs are adapted toresist the strong-arm problems that are caused by quick changes in pressure.