Friday, October 7, 2011

Life of Atlantic Humpbacked Dolphin

Life of Sea | Atlantic Humpbacked Dolphin (Sousa teuszii) | Atlantic humpbacked dolphin is found in the eastern Atlantic Ocean, the Western Sahara, south to southern Angola. This species prefers shallow coastal waters, rivers, canals and estuaries. This is a somewhat solitary species have been observed traveling and feeding alone, however, small groups of 3-7 and larger groups of 20-25 have also been reported, these groups generally consist of young dolphins.  
 
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Cetacea
Suborder: Odontoceti
Family: Delphinidae
Genus: Sousa
Species: S. teuszii

The most distinctive feature of this species is its distinctive humped appearance when it breaks the ocean surface to breathe. This is caused by the large hump or ridge on the back of the dolphin, from which the dorsal fin forward. The  Atlantic humpbacked dolphin has a robust body of mammals, mostly slate gray on the sides and back and light gray on the bottom. It has a long, narrow, distinct beak, broad flippers that are rounded at the top, and a broad tail, deep cut in the central. Atlantic humpbacked dolphin males are larger than females. 
 
Because of their geographic location in Africa in the near regions of civil war,  Atlantic humpbacked dolphins have not been widely studied. Atlantic humpbacked dolphins 26-31 pairs of same teeth, peg-like teeth in each jaw. The differences in counting teeth and vertebrae, along with its geographical location, the main distinguishing characteristics between the teuszii Sousa and the closely related Indo-Pacific humpbacked dolphins, Sousa chinensis. 
Atlantic humpbacked dolphin is known to be slower than other species in the Delphinidae family swim. They dive for periods up to three minutes and are known to jump out of the water. Other common characteristics include Delphinidae, their high brain-to-body mass ratio, which is higher than that of other mammals and think that an indication of intelligence. Like other dolphins, they are equipped with sonar to locate prey out and communicate. 
Off the coast of Mauritania outside, this species has established an equitable partnership with the local fishermen. The dolphins herd schools of fish closer to shore when spotted by fishermen, it proposes the fishermen as the fish and feed the dolphins free.  Atlantic humpbacked dolphins feed on schooling fish such as herring, sea bream, sardines and mullet. When feeding in a group, they herd their prey close to the ground, making it harder for the prey to escape. Like other dolphin species,  Atlantic humpbacked dolphins are at risk of being caught in fishing nets, remote, and proximity to the coast makes them trapped in 'anti-shark "external nets designed to protect beach goers. Coastal development is reducing the habitat of these species also cause decrease in the population. 

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