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The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.
Dugong skeleton displayed at Philippine National Museum. Dugongidae's body weight ranges from 217 to 307 kg for juveniles, 334 to 424 kg for subadults, and 435 to 568.5 kg for adults. Oral temperatures for individual dugongs is determined from 24° to 34.2 °C. Heart rate readings are from 40 to 96 bpm and vary between individual dugongs.
Dugongs generally gather in groups of less than a dozen individuals for one to two days. Since they congregate in turbid waters, little is known about their reproductive behavior. The males are often seen with scars, and the tusks on dugongs grow in first for males, suggesting they are important in lekking.
This list of Latin and Greek words commonly used in systematic names is intended to help those unfamiliar with classical languages to understand and remember the scientific names of organisms. The binomial nomenclature used for animals and plants is largely derived from Latin and Greek words, as are some of the names used for higher taxa , such ...
The manatee's tail is paddle-shaped, and is the clearest visible difference between manatees and dugongs; a dugong tail is fluked, similar in shape to that of a whale. The manatee is unusual among mammals in having just six cervical vertebrae , [ 11 ] a number that may be due to mutations in the homeotic genes . [ 12 ]
When the common name of the organism in English derives from an indigenous language of the Americas, it is given first. In biological nomenclature , organisms receive scientific names , which are formally in Latin , but may be drawn from any language and many have incorporated words from indigenous language of the Americas.
Living organisms are known by scientific names. These binomial names can vary greatly in length, and some of them can become very long depending on the meanings they try to convey. This list of longest species names lists the longest scientific binomials. [1] Species in this list are grouped by length of their name.
The most important criterion was that each species was to have only one English name throughout the world, which was to be different from all other names. [ 1 ] : 3–5 The result, published in 2006, was a 199-page list of species, [ 1 ] : 12–211 arranged taxonomically, [ 1 ] : 2 and a 46-page index, [ 1 ] : 213–259 giving both English and ...