Zebra duiker

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Zebra duiker
Cephalophus zebra.jpg
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Genus: Cephalophus
Species: C. zebra
Binomial name
Cephalophus zebra
Gray, 1838

The zebra duiker (Cephalophus zebra) is a small antelope found primarily in Liberia, as well as the Ivory Coast, Sierra Leone, and occasionally Guinea.[1] They are sometimes referred to as the banded duiker or striped-back duiker. It is believed to be one of the earliest duiker species to have evolved.[2]

Description[edit]

Zebra duikers have gold or red-brown coats with 12-16 distinctive zebra-like stripes, dark markings on their upper legs, and russet faces. Newborns appear darker because they are born with their stripes closer together. An adult can grow to 90 cm (35 in) in length, 45 cm in height, and 20 kg (44 lb) in weight. Their horns are short and round with sharp pointed tips. They are about 4.5 - 5.0 cm long in males, and half that in females. Female body size is larger than males, possibly due to long gestation periods.

Dental Formula:

0/3 I, 0/1 C, 3/2-3 P 3/3 M = 30-32 total[3]

Habitat[edit]

Zebra duikers live in lowland primary rainforests, particularly by clearings and along forest margins. They can less commonly be found in hill and low-mountain forests.

Diet[edit]

They are ruminants which feed primarily on fruit, foliage, and seeds. Though rare, there is evidence that they may eat rodents on occasion. Their reinforced nasal bones enable them crack open the hard exterior of certain fruits.[4]

Reproduction[edit]

The gestation period is anywhere from 221 to 229 days and the female is receptive to mating about 10 days after parturition.[5] The mother will only birth one calf at a time. A newborn can weigh from 1270 to 1550 g at birth. During the first ten days after birth, referred to as the lactation period, a newborn grows at a rate of about 94 g/day.[6] After that, the growth rate decreases considerably. Females reach sexual maturity at 9–12 months of age and males reach sexual maturity at 12–18 months. Cephalophus zebra is the only duiker species with the diploid number 2n=58.

Social behavior[edit]

Zebra duikers have displayed diurnal activity when living in captive situations, but mostly nocturnal in the wild. They are solitary animals that form pair bonds for breeding purposes. Both the male and female participate in the defense of young and home range. Adaptations include stripes and thickened nasal/frontal bones. The stripes may reduce injury to the more vulnerable abdominal area. The stripes may also make it more difficult for some predators to identify by breaking up the outline of their forms. The nasal bones allow for protection against blunt force during altercations.

Economic importance[edit]

They are hunted for bush meat. Their hides and other inedible parts can also be utilized by humans.[7]

Conservation[edit]

They are considered Vulnerable by the IUCN due to deforestation, loss of habitat, and overhunting within its range. Zebra duikers are common prey to Leopards, African Gold Cats, African Rock Pythons, and the Crowned Eagle. The zebra duiker has been described as the species least capable of adapting of all West African Duiker species and most likely to become extinct. The wild population is estimated at 28,000 individuals. This estimation is believed to be high and continues to decline. Having once been more widespread, it is now more common in protected areas, in particular the Gola National Park in Sierra Leone, Sapo National Park in Liberia, and Taï National Park in Ivory Coast.[8] In a study conducted to identify areas of greatest conservation need, one zebra duiker was identified in an unprotected area of the Ziama Classified Forest of Guinea. This area is under consideration for classification as a national park and currently serves as a home to many species categorized as rare and threatened.[9]

References[edit]

  1. ^ a b IUCN SSC Antelope Specialist Group (2008). Cephalophus zebra. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 16 January 2009.
  2. ^ Stuart, Chris & Tilde. (2006) Field Guided to the Larger Mammals of Africa, 3rd Edition. Struik Publishers, Cape Town.
  3. ^ http://reocities.com/rainforest/3881/stripedduiker.htm
  4. ^ Kingdon, Jonathan & Hoffmann, Michael eds. (2013) Mammals of Africa, Volume VI, Pigs Hippopotamuses, Chevrotain, Giraffes, Deer and Bovids. Bloomsbury Publishing, London.
  5. ^ Animal Diversity Web; http://animaldiversity.ummz.umich.edu/accounts/Cephalophus_zebra/
  6. ^ Pontier, D., et al, Postnatal growth rate and adult body weight in mammals: a new approach. (1989) Vol. 80:390-394. Springer-Verlag
  7. ^ The Kingdon Field Guide to African Mammals; Jonathan Kingdon; Academic Press; San Diego, California; 1997
  8. ^ Wilson, D.E. & Mittermeier R. A. eds. (2011) Handbook of the Mammals of the World. Vol. 2. Hoofed Mammals. Lynx Edicions, Barcelona.
  9. ^ David Brugiere, Identifying Priority Areas for the conservation of antelopes in the Republic of Guinea, West Africa, using the complementary approach. Fauna and Flora International, Oryx, 46(2), 253-259; 2012