This article needs additional citations for verification .(February 2012) |
Red-bellied lemur | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Primates |
Suborder: | Strepsirrhini |
Family: | Lemuridae |
Genus: | Eulemur |
Species: | E. rubriventer |
Binomial name | |
Eulemur rubriventer I. Geoffroy, 1850 [3] | |
Distribution of E. rubriventer [1] | |
Synonyms | |
|
The red-bellied lemur (Eulemur rubriventer) is a medium-sized strepsirrhine primate with a luxuriant chestnut brown coat. This lemur is endemic to eastern Madagascan rainforests and is distinguished by patches of white skin below the eyes, giving rise to a "teardrop" effect, particularly conspicuous in the male. [4]
The species, first identified in 1850, exhibits diurnal behaviour and marked sexual dimorphism. The red-bellied lemur has been studied extensively since the mid-1980s, primarily in Ranomafana National Park. [5] [6] This lemur species is designated as vulnerable according to the IUCN Red List, due to threats endangering habitats from slash-and-burn agriculture in Madagascar.
The various Malagasy names for the red-bellied lemur include tongo, tagona, halomena, kirioka, and soamiera. In the French scientific literature (Madagascar's second official language is French, due to prior colonisation by France), the species is called lémur à ventre rouge.[ citation needed ]
Being sexually dimorphic, the male of the species exhibits a medium-long, dense dorsal coat of intense chestnut brown. Ventrally, he is lighter and redder in hue, while his tail, muzzle and head are black. For the female, the dorsal area and tail resemble the male, whereas the ventral fur is a contrasting white-cream colour. Facial markings are similar to the male, except that "tear drops" are less exaggerated and spiry thick cheek hairs of the male are absent. Whereas the genus Eulemur relatives may exhibit ear tufts or a furry beard, these features are absent for E. rubriventer, which has thickened fur around its ears, lending a fuller facial appearance.[ citation needed ]
The adult red-bellied lemur has a length of 34 to 40 cm (13 to 16 in) (excluding tail) and a tail length which is almost twenty percent longer than the body itself; that is, body plus tail length may attain a total length of almost 1 m (3 ft 3 in). Typical body mass of a mature individual ranges from 1.6 to 2.4 kg (3.5 to 5.3 lb). [7] The male has scent glands atop his head. Lifespans may easily exceed 20 years for both sexes.[ citation needed ]
E. rubriventer occurs as far north as the Tsaratanana Massif at an elevation of 2,400 m (7,900 ft), then southerly to the Manampatrana River in a narrow strip of eastern Madagascar rainforest. [3] In previous eras, its range extended further south to the Mananara River. This species is distributed thinly and is restricted only to intact rainforest; it does not occur at all on the Masolala Peninsula.[ citation needed ]
The red-bellied lemur is sympatric with four other Eulemur species: in the extreme north of its range, the white-headed lemur E. albifrons; at mid-range, the common brown lemur E. fulvus; and in its southern range, the red-fronted brown lemur E. rufus and the gray-headed lemur E. cinereiceps. E. rubriventer is, however, easily distinguished from these relatives by the male's distinctive white eye "tear drops" and the rich darkness of the fur of both sexes. A distinction of appearance occurs within E. rubriventer in that northern range males (e.g. Mantadia National Park north) have a more distinctive reddish belly than the southern range counterparts, as in Ranomafana National Park. [8]
The forest type within the red-bellied lemur's range is characterized by dense evergreen vegetation, with a canopy of 25 to 35 m (82 to 115 ft). Typical canopy genera include Dalbergia , Diospyros , Ocotea , Symphonia , and Tambourissa ; emergents of Canarium , Albizia and Neobrochoneura acuminata are also present. The eastern lowland forests also have a rich diversity of Pandanus , bamboo, and epiphytic orchid species.[ citation needed ]
The red-bellied lemur aggregates in monogamous groups ranging from two to 10 individuals. It is one of the few lemurs to be recognized as cathemeral, having both diurnal and nocturnal activity patterns. The home range is estimated to be 25 to 35 acres (10 to 14 ha) with a typical density of five animals per acre. Groups are typically cohesive as they move within their home range, foraging on over 30 species of plants. Considered by some to be a frugivore, it also feeds on leaves, nectar, and flowers of many plant species; this lemur is believed to be a useful and efficient seed disperser.[ citation needed ]
A typical and maximum frequency of births is one offspring per female per year, with initial year infant mortality around 50%. Births normally occur in October and November (early summer in this Southern Hemisphere habitat). The young use their prehensile instincts to attach to the mother and father alternately for the first 33 to 37 days of life. At this point, the mother often refuses further transport services, whilst the father may continue to provide such for another 9 weeks.[ citation needed ]
Modern feeding habits have expanded the species' diet to the introduced "Chinese" (actually Brazilian) guava ( Psidium cattleyanum ). Groups of the red-bellied lemur have become somewhat habituated to humans along certain trail areas in Ramomafana National Park (around Belle Vue) starting in May and June, and much rarer in some lower trail areas of Montadia National Park starting in April. In both instances, the species exhibits a tame behaviour to approaching humans who are silent and walk softly. The animals will descend from the trees to within 2–3 m (6.6–9.8 ft), staring back at the humans with equal curiosity allowing themselves to be photographed as they cling to vertical trunks of saplings, and occasionally engaging in a terrestrial scamper.[ citation needed ]
E. rubriventer occurs in five national parks and seven special reserves in eastern Madagascar, but is classified as vulnerable (IUCN Red List) due to ongoing habitat reduction from slash-and-burn farming, illegal logging, and even hunting. The species is the subject of current study in its natural habitat as well as in captivity in research centers such as the Duke Lemur Center.
Lemuridae is a family of strepsirrhine primates native to Madagascar and the Comoros. They are represented by the Lemuriformes in Madagascar with one of the highest concentration of the lemurs. One of five families commonly known as lemurs. These animals were once thought to be the evolutionary predecessors of monkeys and apes, but this is no longer considered correct. They are formally referred to as lemurids.
Lemurs are wet-nosed primates of the superfamily Lemuroidea, divided into 8 families and consisting of 15 genera and around 100 existing species. They are endemic to the island of Madagascar. Most existing lemurs are small, have a pointed snout, large eyes, and a long tail. They chiefly live in trees and are active at night.
The Madagascar lowland forests or Madagascar humid forests are a tropical moist broadleaf forest ecoregion found on the eastern coast of the island of Madagascar, home to a plant and animal mix that is 80 to 90% endemic, with the forests of the eastern plain being a particularly important location of this endemism. They are included in the Global 200 list of outstanding ecoregions.
The ruffed lemurs of the genus Varecia are strepsirrhine primates and are the largest extant lemurs within the family Lemuridae. Like all living lemurs, they are found only on the island of Madagascar. Formerly considered to be a monotypic genus, two species are now recognized: the black-and-white ruffed lemur, with its three subspecies, and the red ruffed lemur.
True lemurs, also known as brown lemurs, are the lemurs in genus Eulemur. They are medium-sized primates that live exclusively on Madagascar.
The crowned lemur is a lemur that is 31–36 cm (12–14 in) long and weighs 2 kg (4.4 lb). Its tail is about 42–51 cm (17–20 in) long.
The eastern woolly lemur, also known as the eastern avahi or Gmelin's woolly lemur, is a species of woolly lemur native to eastern Madagascar, where it lives in the wet tropical rainforest at low elevations along the eastern coast of the island or they can also inhabit the northern tip of the island with other species. The woolly lemur name refers to their thick, tightly curled hair, whereas their generic name avahi refers to their high-pitched defensive call. The eastern woolly lemur almost has an owl-look with its large eyes, small rounded head, and ears that are mostly hidden. This nocturnal animal weighs 1.0–1.3 kg (2.2–2.9 lb) and reaches a length of 27–29 cm (11–11 in) with a tail of 33–37 cm (13–15 in). Its diet consists mainly of leaves and buds with fruits, flowers, and bark.
The black lemur is a species of lemur from the family Lemuridae. Like all lemurs, it is endemic to Madagascar. Originally, the species was thought to have two subspecies, Eulemur macaco macaco and Eulemur macaco flavifrons, both of which were elevated to species status by Mittermeier et al. in 2008 to Eulemur macaco and Eulemur flavifrons respectively. The most startling difference between the two species is the eye colour; Eulemur flavifrons, the blue-eyed black lemur, has blue eyes, while Eulemur macaco, the black lemur, has brown or orange eyes, and also has ear tufts.
Masoala National Park, in northeast Madagascar, is the largest of the island's protected areas. Most of the park is situated in Sava Region and a part in Analanjirofo. Created in 1997, the park protects 2,300 square kilometres of rainforest and 100 square kilometres of marine parks. The Masoala Peninsula is exceptionally diverse due to its large size, and variety of habitats. Altogether, the park protects tropical rainforest, coastal forest, flooded forest, marsh, and mangrove. Three marine parks protect coral reefs and a dazzling array of marine life.
The eastern lesser bamboo lemur, also known as the gray bamboo lemur, the gray gentle lemur, and the Mahajanga lemur is a small lemur endemic to Madagascar, with three known subspecies. As its name suggests, the eastern lesser bamboo lemur feeds mainly on bamboo. The lemurs of the genus Hapalemur have more manual dexterity and hand–eye coordination than most lemurs. They are vertical climbers and jump from stalk to stalk in thick bamboo forests.
The diademed sifaka, or diademed simpona, is an endangered species of sifaka, one of the lemurs endemic to certain rainforests in eastern Madagascar. Along with the indri, this species is one of the two largest living lemurs, with an average weight of 6.5 kg and a total adult length of approximately 105 centimetres (41 inches), half of which is its tail. Russell Mittermeier, one of the contemporary authorities on lemurs, describes the diademed sifaka as "one of the most colorful and attractive of all the lemurs", having a long and silky coat. P. diadema is also known by the Malagasy names simpona, simpony and ankomba joby. The term "diademed sifaka" is also used as a group species designation formerly encompassing four distinct subspecies.
The blue-eyed black lemur, also known as the Sclater's lemur, is a species of true lemur. It can attain a body length of 39–45 cm (15–18 in), a tail length of 51–65 cm (20–26 in), a total length of 90–100 cm (35–39 in), and a weight of 1.8–1.9 kg (4.0–4.2 lb). Being a primate, it has strong hands with palms like a human, which have a rubbery texture to give it a firm grip on branches. Its tail is longer than its body and is non-prehensile.
The common brown lemur is a species of lemur in the family Lemuridae. It is found in Madagascar and has been introduced to Mayotte.
The collared brown lemur, also known as the red-collared brown lemur or red-collared lemur, is a medium-sized strepsirrhine primate and one of twelve species of brown lemur in the family Lemuridae. It is only found in south-eastern Madagascar. Like most species of lemur, it is arboreal, moving quadrupedally and occasionally leaping from tree to tree. Like other brown lemurs, this species is cathemeral, lives in social groups, primarily eats fruit, exhibits sexual dichromatism, and does not demonstrate female dominance. The species is listed as Endangered by the International Union for Conservation of Nature (IUCN) and is threatened primarily by habitat loss.
The silky sifaka is a large lemur characterized by long, silky, white fur. It has a very restricted range in northeastern Madagascar, where it is known locally as the simpona. It is one of the rarest mammals on Earth. The silky sifaka is one of nine sifaka species, and one of four former subspecies of diademed sifaka (P. diadema). Studies in 2004 and 2007 compared external proportions, genetics, and craniodental anatomy supporting full species status, which has generally been accepted.
Ambatovaky Special Reserve is a tropical rainforest and wildlife reserve in the north-east of Madagascar. It is designated by Bird Life International as an Important Bird Area for the large number of endemic species of birds.
Ambohitantely Special Reserve is a 5,600-hectare (14,000-acre) wildlife reserve of Madagascar.
The red lemur, also known as the rufous brown lemur or northern red-fronted lemur, is a species of lemur from Madagascar. Until 2001, the species E. rufus was considered a subspecies of the common brown lemur, E. fulvus, after which it was classified as its own species. In December 2008, the species was split into two separate species, the red lemur, E. rufus, distributed in dry lowland forests in northwestern Madagascar, and the red-fronted lemur, E. rufifrons, distributed in southwest and eastern Madagascar. The species split was based on genetic and morphological evidence. Mitochondrial DNA analysis indicates that E. rufifrons may be more closely related to the common brown lemur, white-headed lemur and Sanford's brown lemur than it is to E. rufus.
Milne-Edwards's sifaka, or Milne-Edwards's simpona, is a large arboreal, diurnal lemur endemic to the eastern coastal rainforest of Madagascar. Milne-Edwards's sifaka is characterized by a black body with a light-colored "saddle" on the lower part of its back. It is closely related to the diademed sifaka, and was until recently considered a subspecies of it. Like all sifakas, it is a primate in the family Indriidae.
The Lavasoa dwarf lemur is a small, nocturnal strepsirrhine primate and a species of lemur that is endemic to three small, isolated patches of forest on the southern slopes of the Lavasoa Mountains in southern Madagascar. Fewer than 50 individuals are thought to exist. Its habitat lies in a transitional zone between three ecoregions: dry spiny bush, humid littoral forest, and humid forest. First collected in 2001 and thought to be a subpopulation of the furry-eared dwarf lemur (C. crossleyi), it was not formally described until 2013. It is one of six species of dwarf lemur, though the research that identified it also suggested the existence of many more new species.