Common brown lemur

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Male
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Female with juvenile
both in Peyrieras, Madagascar
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Scientific classification Edit this classification
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Binomial name
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Distribution of E. fulvus:[2]
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Synonyms
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  • bruneus van der Hoeven, 1844
  • mayottensis Schlegel, 1866

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The common brown lemur (Eulemur fulvus) is a species of lemur in the family Lemuridae. It is found in Madagascar and has been introduced to Mayotte.[2]

Taxonomy

Five additional currently recognized species of lemur were until 2001 considered subspecies of E. fulvus.[4]Template:Rp These are:

However, a number of zoologists believe that E. albifrons and E. rufus should continue to be considered subspecies of E. fulvus.[4]Template:Rp

Physical description

The common brown lemur has a total length of 84 to 101 cm (33 to 40 in), including 41 to 51 cm (16 to 20 in) of tail.[5] Weight ranges from 2 to 3 kg (4.4 to 6.6 lb).[5] Common brown lemurs are unique amongst Eulemur in that they exhibit little-to-no sexual dichromatism: in both males and females, the face, muzzle and crown are dark gray or black, with white or tan "cheeks" of varying thickness. Some individuals may have pale-colored eyebrow patches, and the eyes are almost always a deep orange-red. The short, dense fur of the body is primarily brown or gray-brown, with a lighter gray or tan underside. The fur on the back of their hands is often a medium orange or reddish color, and their long, bushy tail may either be similar in color to the dorsal pelage or, more commonly, a darker shade of gray, black, or brown.[5]

Due to the species' history of containing all fellow brown lemurs as subspecies, they are very commonly misidentified in images and texts, and often confused with other species (such as red-fronted lemurs and gray-headed lemurs) or with various other unrelated hybrids.

Similar lemur species within their range include the mongoose lemur (E. mongoz) in the west and the red-bellied lemur (E. rubriventer) in the east.[5] They can be distinguished from these species by the fact that E. mongoz is more of a grey color and E. rubriventer is more reddish. There is also some overlap with the black lemur in northeast Madagascar in the Galoko, Manongarivo and Tsaratanana Massifs.[4]Template:Rp There is also overlap and hybridization with the white-fronted brown lemur, E. albifrons, in the northeast portion of the common brown lemur's range.[4]Template:Rp

Behavior

Consistent with its large range, the common brown lemur occupies a variety of forest types, including lowland rainforests, montane rainforests, moist evergreen forests and dry deciduous forests.[5] They spend about 95% of their time in upper layers of the forest and less than 2% of their time on the ground.[6]

They normally live in groups of 5 to 12, but group size can be larger, especially on Mayotte.[5] Groups occupy home ranges of 1 to 9 hectares in the west, but more than 20 hectares in the east.[7] Groups include members of both sexes, including juveniles, and there are no discernible dominance hierarchies.[5]

They are primarily active during the day, but can exhibit cathemeral activity and continue into the night, especially during full moons[5] and during the dry season.[4]Template:Rp[8]

In the western part of its range, the common brown lemur overlaps that of the mongoose lemur, and the two species sometimes travel together.[6] In the areas of overlap, the two species also adapt their activity patterns to avoid conflict.[8] For example, the mongoose lemur can become primarily nocturnal during the dry season in the areas of overlap.

At Berenty (south Madagascar) there is a population of introduced E. fulvus rufus x collaris.[9] These lemurs show linear hierarchy, adult female dominance, and the presence of conciliatory behavior after aggressions.[10] Additionally, stress levels (measured via self-directed behaviors) decrease at the increase of the hierarchical position of individuals within the social group and reconciliation is able to bring stress down to the baseline levels.[11]

Reproduction

The common brown lemur's mating season is May and June.[5] After a gestation period of about 120 days, the young are born in September and October.[5] Single births are most common, but twins have been reported.[5] The young are weaned after about 4 to 5 months.[5][6] Sexual maturity occurs at about 18 months,[5] and females give birth to their first young at 2 years old.[6] Life span can be as long as 30+ years.[6]

Ecology

Diet

The common brown lemur's diet consists primarily of fruits, young leaves, and flowers.[4]Template:Rp In some locations it eats invertebrates, such as cicadas,[5] spiders[5] and millipedes.[6] It also eats bark, sap, soil and red clay (see geophagy).[6] It can tolerate greater levels of toxic compounds from plants than other lemurs can.[4]Template:Rp[6]

The common brown lemur from a Brazilian zoo was found to be a host of an intestinal acanthocephalan parasitic worm,Pachysentis dollfusi. It is unknown if the worm originates from Brazil or Madagascar.[12]

Distribution

The common brown lemur lives in western Madagascar north of the Betsiboka River and eastern Madagascar between the Mangoro River and Tsaratanana, as well as in inland Madagascar connecting the eastern and western ranges.[4]Template:Rp They also live on the island of Mayotte, although this population has been introduced there by man.[4]Template:Rp

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.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. 115. ISBN 0-801-88221-4. OCLC 62265494.
  2. ^ a b c Template:Cite iucn
  3. ^ Page Module:Citation/CS1/styles.css has no content."Checklist of CITES Species". CITES. UNEP-WCMC. Retrieved 18 March 2015.
  4. ^ a b c d e f g h i Page Module:Citation/CS1/styles.css has no content.Russell Mittermeier; et al. (2006). Lemurs of Madagascar (2nd ed.). Conservation International. ISBN 1-881173-88-7.
  5. ^ a b c d e f g h i j k l m n o Page Module:Citation/CS1/styles.css has no content.Nick Garbutt (2007). Mammals of Madagascar. Yale University Press. pp. 155–156. ISBN 978-0-300-12550-4.
  6. ^ a b c d e f g h Page Module:Citation/CS1/styles.css has no content.Noel Rowe (1996). The Pictorial Guide to the Living Primates. Pogonias Press. p. 40. ISBN 0-9648825-0-7.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Lisa Gould; Michelle Sauther (2007). "Lemuriformes". In Christina J. Campbell; Agustin Fuentes; Katherine C. MacKinnon; Melissa Panger; Simon K. Bearder (eds.). Primates in Perspective. Oxford University Press. p. 53. ISBN 978-0-19-517133-4.
  8. ^ a b Page Module:Citation/CS1/styles.css has no content.Robert W. Sussman (1999). Primate Ecology and Social Structure Volume 1: Lorises, Lemurs and Tarsiers. Pearson Custom Pub. pp. 186–187. ISBN 0-536-02256-9.
  9. ^ Page Module:Citation/CS1/styles.css has no content.Alison Jolly; Naoki Koyama; Hantanirina Rasamimanana; Helen Crowley; George Williams (2006). "Berenty Reserve: a research site in southern Madagascar". In A. Jolly; R. W. Sussman; N. Koyama; H. Rasamimanana (eds.). Ringtailed Lemur Biology: Lemur catta in Madagascar. Springer. pp. 32–42. ISBN 0-387-32669-3.
  10. ^ Page Module:Citation/CS1/styles.css has no content.Norscia, I.; Palagi, E. (2010). "Do wild brown lemurs reconcile? Not always". Journal of Ethology. 29: 181–185. doi:10.1007/s10164-010-0228-y. S2CID 45324039.
  11. ^ Page Module:Citation/CS1/styles.css has no content.Palagi, E.; Norscia, I. (2010). "Scratching around stress: hierarchy and reconciliation make the difference in wild brown lemurs Eulemur fulvus". Stress. 14 (1): 93–7. doi:10.3109/10253890.2010.505272. PMID 20666657. S2CID 21758712.
  12. ^ Page Module:Citation/CS1/styles.css has no content.Gomes, Ana Paula N.; Amin, Omar M.; Olifiers, Natalie; Bianchi, Rita de Cassia; Souza, Joyce G. R.; Barbosa, Helene S.; Maldonado, Arnaldo (2019). "A New Species of Pachysentis Meyer, 1931 (Acanthocephala: Oligacanthorhynchidae) in the Brown-Nosed Coati Nasua nasua (Carnivora: Procyonidae) from Brazil, with Notes on the Genus and a Key to Species". Acta Parasitologica. 64 (3): 587–595. doi:10.2478/s11686-019-00080-6. PMC 6814649. PMID 31286360.

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