Wednesday, November 2, 2011

Life of Spotted Eagle Ray

Life of Sea | Spotted Eagle Ray (Aetobatus narinari) | Spotted eagle ray or white-spotted eagle ray, a cartilaginous fish of the eagle ray family. Spotted eagle rays are often found in shallow coastal waters such as bays and coral reefs but may cross oceanic basins. She is sometimes estuaries. They swim near the surface, sometimes leaping from the water, or near the bottom. They often form large schools during non-breeding season. The Spotted eagle ray is distributed worldwide in tropical coastal waters. It can be found worldwide in tropical regions, including the Gulf of Mexico, Hawaii, Atlantic Africa, Indian Ocean, Oceania and the Pacific coast of America and is found in shallow waters of a depth of 80 meters.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Chondrichthyes
Order:     Myliobatiformes
Family:     Myliobatidae
Genus:     Aetobatus
Species:     A. narinari

The Spotted eagle ray has a long snout, flat and round, a large head and a pectoral disc with sharply curved, angular corners, and no tail, jaws usually with single row of flat, chevron-shaped teeth. Each tooth has a crescent-shaped plate joined into a band. They usually have a large number of white spots on black or blue disk, white below. Long whip-like tail, with a long spine near the base, behind small dorsal fin. The total length of a mature spotted eagle ray can reach 5 meters. The tail is longer than the other rays. It may be 2-6 poisonous spines on the tail.

Spotted eagle rays feed on mollusks and crustaceans, especially malacostracans. The rays eat bivalves, which are animals with two shells, and gastropods such as snails. Spotted eagle ray feed on hermit crabs. These rays also eat shrimp, octopus, and a few small fish. Studies have shown no differences in the dietary habits of men and women or in rays from different regions. The Spotted eagle ray, along with many other rays, often victims of sharks, such as the tiger shark, lemon shark, the bull shark, the silver tip shark and the great hammerhead shark.

A male, or sometimes more than one, a woman will pursue. When the male approaches the female, he uses his upper teeth to grab her dorsal plate. The male than female roles taken over by grabbing her pectoral fin. After she was on her belly, the man will be a branch into the female. They will be connected Venter to Venter. The coverage process can last anywhere thirty to ninety seconds. The spotted eagle ray ovoviviparously develops, that is, the eggs hatch and feed from an internal yolk sac until birth.

The movement of Spotted eagle rays are influenced by the tides. A tracking study showed that Spotted eagle ray was active during high water. These rays have a number of characteristic behaviors, such as digging with their snout in the sand of the ocean. As you do this, a cloud of sand around the radius and the sand spits out his gills. The spotted eagle ray also has two motions, the abdomen and pectoral fins are moved rapidly up and down. They often do this one to five times in a row. As for jumping, there are two kinds of jumps.  

One is a vertical jump, where the jet propels itself vertically from the water immediately and then again in the same way. A form of travel is called loose aggregation. This occurs when three to sixteen rays swimming in a separate group, with occasional interaction between the beams. The common school consists of six or more rays swimming in the same direction at exactly the same speed.

The dorsal spots are the Spotted eagle ray an aquarium attraction, but because of its large size it is probably no longer than at public aquariums. There is no target fishery for the spotted eagle ray, but it is often eaten Accidental bycatch.The rays are mainly caught as prisoners in Southeast Asia and Africa. They are also often in the commercial marine life aquarium trade and are used very often. As a Manta Ray in captivity is considered a problem in the vicinity of the molluscs, however, the beam is often slain, there have been many attempts to help protect the species.

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