Lac Alaotra bamboo lemur

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Lac Alaotra bamboo lemur
Hapalemur alaotrensis JJLM.JPG
Lac Alaotra bamboo lemur near Lake Alaotra
CITES Appendix I (CITES) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Strepsirrhini
Family: Lemuridae
Genus: Hapalemur
Species:
H. alaotrensis
Binomial name
Hapalemur alaotrensis
Rumpler, 1975 [3]
Hapalemur alaotrensis range map.svg
Distribution of H. alaotrensis [1]

The Lac Alaotra bamboo lemur (Hapalemur alaotrensis), also known as the Lac Alaotra gentle lemur, Alaotran bamboo lemur, Alaotran gentle lemur, Alaotra reed lemur, [4] or locally as the bandro, is a bamboo lemur. It is endemic to the reed beds in and around Lac Alaotra, in northeast Madagascar. It is about 40 cm (16 in) long, with a similar length tail, and is a brownish-gray colour. It is the only bamboo lemur to live in and feed on papyrus reeds, and other reeds and grasses, and some authorities argue that it should be regarded as a subspecies of the eastern lesser bamboo lemur (Hapalemur griseus). The population of this lemur has been declining because of habitat destruction and the International Union for Conservation of Nature has rated it as being "critically endangered".

Contents

Taxonomy

Lac Alaotra bamboo lemur at Jersey Zoo Alaotra-Bambuslemur bei Durrell.JPG
Lac Alaotra bamboo lemur at Jersey Zoo

The classification of the bandro is disputed, with some classifying it as a subspecies of Hapalemur griseus , [1] while others see it as a separate species. [3] Current genetic data do not support species status. [5] Mitochondrial DNA sequences from the two populations H. g. griseus and H. g. alaotrensis are interspersed with each other on the phylogenetic tree. [6] Moreover, average genetic distances between the two subspecies are within the range of within-taxon comparisons and not in the range of between-taxon comparisons. A final assessment of species versus subspecies status requires filling in gaps in sampling and the use of nuclear loci. GenBank, the universal repository for genetic sequence information, has not accepted the species status of the Aloatran lemur and lists it as a subspecies. [7]

Description

The tail and body of the Lac Alaotra bamboo lemur are both 40 cm (16 in) on average, and it weighs 1.1–1.4 kg (2.4–3.1 lb), with males slightly larger than females. [8] Its dense, woolly fur is a gray-brown on the back, lighter gray on the face and chest, and chestnut brown on the head and neck. [8]

Ecology

This lemur is the only primate specifically adapted to living in papyrus reeds. Unlike other bamboo lemurs, the Lac Alaotra bamboo lemur does not eat bamboo; instead, it feeds on the stems of papyrus reeds, shoots of the grass Phragmites communis , and two other species of grasses ( Echinochloa crus-galli and Leersia hexandra ). [9]

Status

The population of Lac Alaotra bamboo lemur is declining as suitable habitat around the lake is being destroyed and converted to rice fields. Other threats include the burning of the marshland and hunting of the lemurs for food and the pet trade. The International Union for Conservation of Nature has rated this lemur as being "critically endangered", but a new 42,478 hectare protected area was created around the lake in 2007 which should provide some protection for the lemurs. The Durrell Wildlife Conservation Trust has a Lac Alaotra bamboo lemur conservation program, and some captive breeding is being done in zoos. [1] The species is listed in CITES Appendix I. [2]

Threats

Conversion of the marsh habitat to rice fields poses a severe threat to the survival of the Hapalemur alaotrensis species. While the remaining marshlands are resistant to conversion due to regular flooding, the potential implementation of a major drainage project in the region could significantly jeopardize the species' existence. [1] Burning of the remaining marshlands is a common practice for fishing and cattle grazing, leading to increased aquatic plants that choke fishing areas. This cycle of burning not only poses a direct threat to the lemurs but also limits marsh regeneration after flooding, exacerbating the challenges faced by the Hapalemur alaotrensis population. [1] Hunting for food and capturing lemurs for pets have significantly contributed to the decline in Hapalemur alaotrensis numbers. Local communities employ various hunting and trapping methods, including direct pursuit by dogs, harpooning, snares, and habitat burning. With over 1,000 lemurs hunted annually in certain years, anthropogenic pressures remain a considerable threat to the species' survival. [1]

Related Research Articles

<span class="mw-page-title-main">Lemuridae</span> Family of lemurs

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.

<span class="mw-page-title-main">Lemur</span> Clade of primates endemic to the island of Madagascar

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.

<span class="mw-page-title-main">Lake Alaotra</span> Lake in Madagascar

Lake Alaotra is the largest lake in Madagascar, located in Alaotra-Mangoro Region and on the island's northern central plateau. Its basin is composed of shallow freshwater lakes and marshes surrounded by areas of dense vegetation. It forms the center of the island's most important rice-growing region. It is a rich habitat for wildlife, including some rare and endangered species, as well as an important fishing ground. Lake Alaotra and its surrounding wetlands cover 7,223 square kilometres (2,789 sq mi), and include a range of habitats, including open water, reedbeds, marshes, and rice paddies. The lake itself covers 900 km2 (350 sq mi). Lake Alaotra was declared a wetland of international importance under the international Ramsar Convention on February 2, 2003.

<span class="mw-page-title-main">Ruffed lemur</span> Genus of primates from Madagascar

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.

<span class="mw-page-title-main">Bamboo lemur</span> Genus of lemurs

The bamboo lemurs or gentle lemurs are the lemurs in genus Hapalemur. These medium-sized primates live exclusively on Madagascar.

<span class="mw-page-title-main">Golden-brown mouse lemur</span> Species of lemur

The golden-brown mouse lemur, also known as the (Lac) Ravelobe mouse lemur, is part of the Cheirogaleidae family, and the smallest species of lemur. It is arboreal, nocturnal and usually social. It get its name from the color of its body. Like several other mouse lemurs, like the brown mouse lemur, it is a small primate that has a brown dorsal side and a whitish-grey for its ventral side of the body. All lemurs live in Madagascar. This species was discovered in 1994.

<span class="mw-page-title-main">Golden bamboo lemur</span> Species of lemur

The golden bamboo lemur, bokombolomena or varibolomena in Malagasy, is a medium-sized bamboo lemur endemic to south-eastern Madagascar.

<span class="mw-page-title-main">Greater bamboo lemur</span> Species of lemur

The greater bamboo lemur, also known as the broad-nosed bamboo lemur and the broad-nosed gentle lemur, is a species of lemur endemic to the island of Madagascar.

<span class="mw-page-title-main">Eastern lesser bamboo lemur</span> Species of lemur

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.

<span class="mw-page-title-main">Northern sportive lemur</span> Species of lemur

The northern sportive lemur, also known as the Sahafary sportive lemur or northern weasel lemur, is a species of lemur in the family Lepilemuridae. It is endemic to Madagascar. As a result of severe ecological and human pressures, the lemur is classified as Critically Endangered (CR) by the IUCN Red List.

<span class="mw-page-title-main">Western lesser bamboo lemur</span> Species of lemur

The western lesser bamboo lemur, also known as the northern bamboo lemur, western gentle lemur, or Sambirano lesser bamboo lemur, is a species of bamboo lemur endemic to Madagascar.

<span class="mw-page-title-main">Southern lesser bamboo lemur</span> Species of lemur

The southern lesser bamboo lemur, also known as the southern bamboo lemur, rusty-gray lesser bamboo lemur, and southern gentle lemur, is a species of bamboo lemur endemic to southern Madagascar.

Maningoza Special Reserve is a 9,826 hectares wildlife reserve near Besalampy in Madagascar. It was created in 1956 to protect the many endemic plants and animals, and it also contains some of the last remaining areas of dry deciduous forest on the island.

<span class="mw-page-title-main">Evolution of lemurs</span> History of primate evolution on Madagascar

Lemurs, primates belonging to the suborder Strepsirrhini which branched off from other primates less than 63 million years ago, evolved on the island of Madagascar, for at least 40 million years. They share some traits with the most basal primates, and thus are often confused as being ancestral to modern monkeys, apes, and humans. Instead, they merely resemble ancestral primates.

<span class="mw-page-title-main">Durrell's vontsira</span> Small species of carnivoran from Madagascar

Durrell's vontsira is a small, reddish-brown, fox-like mammal native to the island of Madagascar. Discovered in 2004, it lives only in the biodiverse wetlands of Lake Alaotra. Durrell's vontsira belongs to the family Eupleridae, a group of meat-eating, cat- or fox-like mammals found only on Madagascar. The species is closely related to the brown-tailed mongoose, with which it forms the genus Salanoia. The two are genetically similar, but morphologically distinct, and S. durrelli was described as a new species in 2010.

<span class="mw-page-title-main">Milne-Edwards's sifaka</span> Species of lemur

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.

<span class="mw-page-title-main">Taxonomy of lemurs</span> Science of describing species and defining the evolutionary relationships between taxa of lemurs

Lemurs were first classified in 1758 by Carl Linnaeus, and the taxonomy remains controversial today, with approximately 70 to 100 species and subspecies recognized, depending on how the term "species" is defined. Having undergone their own independent evolution on Madagascar, lemurs have diversified to fill many ecological niches normally filled by other types of mammals. They include the smallest primates in the world, and once included some of the largest. Since the arrival of humans approximately 2,000 years ago, lemurs have become restricted to 10% of the island, or approximately 60,000 square kilometers (23,000 sq mi), and many face extinction. Concerns over lemur conservation have affected lemur taxonomy, since distinct species receive increased conservation attention compared to subspecies.

References

  1. 1 2 3 4 5 6 7 Ralainasolo, F.B.; Raveloarimalala, M.L.; Randrianasolo, H.; Heriniaina, R.; Clarke, T.; Ravaloharimanitra, M.; Volampeno, S.; Donati, G.; Razafindramanana, J.; Andriantsimanarilafy, R.R.; Randriatahina, G.; Irwin, M.; Eppley, T.M.; Borgerson, C. (2020). "Hapalemur alaotrensis". IUCN Red List of Threatened Species . 2020: e.T9676A182236363. doi: 10.2305/IUCN.UK.2020-3.RLTS.T9676A182236363.en . Retrieved 19 November 2021.
  2. 1 2 "Checklist of CITES Species". CITES. UNEP-WCMC. Retrieved 18 March 2015.
  3. 1 2 Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. p. 116. ISBN   0-801-88221-4. OCLC   62265494.
  4. "Mammal Diversity Database". mammaldiversity.org. American Society of Mammalologists. 2019. Retrieved 6 January 2019.
  5. Pastorini, J., Forstner, M. R. J. and Martin, R. D. 2002. Phylogenetic relationships of gentle lemurs (Hapalemur). Evolutionary Anthropology 11, 150-154.
  6. Figure 1 of Pastorini, J., Forstner, M. R. J. and Martin, R. D. 2002. Phylogenetic relationships of gentle lemurs (Hapalemur). Evolutionary Anthropology 11, 150-154
  7. NCBI taxonomy database: https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi
  8. 1 2 Mittermeier, Russell A.; Konstant, William R.; Hawkins, Frank; Louis, Edward E. & Langrand, Olivier (2006). Lemurs of Madagascar (2nd ed.). Conservation International. pp. 222–225. Retrieved 2006-10-29.
  9. Mutschler, T. (1999). "Folivory in a Small-Bodied Lemur". In Berthe Rakotosamimanana; Hanta Rasamimanana; Jörg U. Ganzhorn; Steven M. Goodman (eds.). New Directions in Lemur Studies. pp. 221–239. doi:10.1007/978-1-4615-4705-1_13. ISBN   978-1-4613-7131-1.