петак, 20. новембар 2015.

LEMUR

LEMUR


Lemurs are primates and prosimians (not monkeys). The word "lemur" comes from the Latin word lemures, which means "ghosts". This name refers to many of the nocturnal lemur species and their large eyes. Lemur may be any member of the four lemuriform families, but it is also the genus of one of the lemuriform species. There are two so-called flying lemurs, but they are not real lemurs.

Lemurs live only on the island of Madagascar and some smaller islands next to it, for example the Comoros. They weigh from 30g to the 10kg. Larger species have all become extinct since human groups moved to Madagascar. Usually, the smaller lemurs are active at night (nocturnal), and the larger ones are active during the day (diurnal).

Lemurs are white and black with a ring tail. They are about 1.5 meters tall and weigh about 2 to 3.5 kilograms. They move quietly, usually at night, sometimes letting out eerie wailing cries, which some people think is the reason why they got their names.


Lemurs mostly eat fruit, leaves, and other plant parts. They live in family groups of 5 to 42 members which is called a troop. Females are dominant and remain in the same troop for life. Males move between troops. The female's gestation period lasts four to five months, and they usually have between one and two babies. Lemur mothers nurse their babies until they are about four months old. Then they begin to feed the babies solid food such as fruit. Lemurs spend most of their time in the trees. Some are fantastic leapers, flinging themselves from tree to tree. Lemurs live for about 27 years.



Lemurs communicate with a variety of hoots. They will also send messages with scents (smells). When a male lemur wants to scare another male away, he first rubs its tail on the smelly glands under its arms and then waves the tail in the other male's face. These are called "stink fights".


Today, there are about 32-35 living lemur species. All lemurs are endangered species, because people destroy their habitat and hunt them.

Lavasoa dwarf lemur
Grey bamboo lemur
Ring-tailed lemur
Aye-aye
Black-and-white ruffed lemur
Silky sifaka


In addition to being listed as endangered in 2014 by the IUCN, the ring-tailed lemur has been listed since 1977 by CITES under Appendix I,which makes trade of wild-caught specimens illegal. Although there are more endangered species of lemur, the ring-tailed lemur is considered a flagship species due to its recognizability.


Three factors threaten ring-tailed lemurs. First and foremost is habitat destruction. Starting nearly 2,000 years ago with the introduction of humans to the island, forests have been cleared to produce pasture and agricultural land.Extraction of hardwoods for fuel and lumber, as well mining and overgrazing, have also taken their toll. Today, it is estimated that 90% of Madagascar's original forest cover has been lost. Rising populations have created even greater demand in the southwest portion of the island for fuel wood, charcoal, and lumber. Fires from the clearing of grasslands, as well as slash-and-burn agriculture destroy forests. Another threat to the species is harvesting either for food (bush meat) or pets. Finally, periodic drought common to southern Madagascar can impact populations already in decline. In 1991 and 1992, for example, a severe drought caused an abnormally high mortality rate among infants and females at the Beza Mahafaly Special Reserve. Two years later, the population had declined by 31% and took nearly four years to start to recover.



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