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Biology

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In the past, the attractive Soemmerring's gazelles used to gather in their hundreds as they undertook seasonal migrations (2). Today, this magnificent sight is rare, as the gazelle is seldom seen in herds composed of more than 15 individuals. These are often herds of females and their young, accompanied by a single adult male on his territory. The territorial male marks his range with dung, and should another male venture onto his land, aggressive confrontations may ensue (2). Such encounters involve scraping their horns on the ground (3), head-flicking, and yanking their opponent's horns sideways in an attempt to destabilise their rival (2). Mating in Soemmerring's gazelle peaks between September and November (2). After a gestation of around 198 days, the female gives birth to a single calf that lies well hidden in grass until it is strong enough to keep up with its mother (3). This usually takes about a month (2), during which time the mother returns to her calf only to nurse it (3). By the age of six months the calves are weaned, and by just 18 months the gazelle is sexually mature and capable of reproducing. Soemmerring's gazelles live for up to 14 years (2). Soemmerring's gazelles feed primarily on grasses (5); their narrow muzzle and mobile lips enable them to carefully select the best quality grass (3). The main predators of Soemmerring's gazelle include cheetahs, lions, leopards, Cape hunting dogs, hyenas and even pythons (3).
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Conservation

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The largest population of Soemmerring's gazelle occurs in Awash National Park in Ethiopia (7). However, even within this protected area, seasonal cattle grazing occurs which may impact the gazelle's food supply (8). There are no specific conservation measures known to be in place for this vulnerable gazelle at present.
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Description

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These large, pale gazelles once gathered in their hundreds on the open plains of the Horn of Africa (2). Soemmerring's gazelles bear short, heavy, lyre-shaped horns that sweep backwards and point inwards at the tip. The large head is also distinctive due to the prominent facial markings (2); dark stripes run down the nose and from the corners of the eyes to the nose, separated with white stripes (3). Soemmerring's gazelle has a tawny-red coat on its back, with an extensive white patch on the rump. Its undersides are bright white, as are its long legs, ending in large hooves (2) (3). The short, tapered tail is mainly white but ends in a black tuft (2) (3). Three subspecies of Sommerring's gazelles are recognised, each distinguishable by aspects of their appearance. Gazella soemmerringii soemmerringii has a brown face and shorter horns; the face of G. s. berberana is blacker and it bears longer horns, and G. s. butteri has darker flanks and stripes on its thighs (2).
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Habitat

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Soemmerring's gazelle inhabits rough, hilly country and semi-arid grasslands, often with scattered Acacia trees and bushes (2) (4).
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Range

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Endemic to the Horn of Africa (2), Soemmerring's gazelle occurs in Djibouti, Eritrea, Ethiopia, Kenya, Somalia and Sudan (1). G. s. soemmerringii occurs primarily in Sudan, G. s. berberana is found in Somalia and G. s. butteri primarily inhabits southern Ethiopia (2).
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Status

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Classified as Vulnerable (VU) on the IUCN Red List 2007 (1).
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Threats

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Assessed as Vulnerable to extinction by the World Conservation Union (IUCN) (1), the Soemmerring's gazelle has experienced a serious decline in numbers (6). It has now been exterminated from many parts of its historical range, and remaining populations exist in small pockets (2). While overgrazing by domestic livestock and agricultural development, which reduces the Soemmerring's gazelle's food supply, is believed to be the main cause of this decline, hunting may have also played a significant role (2) (6), as for a long time gazelles have been hunted by people for food (6).
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Soemmerring's gazelle

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Soemmerring's gazelle (Nanger soemmerringii), also known as the Abyssinian mohr, is a gazelle species native to the Horn of Africa (Djibouti, Eritrea, Ethiopia, Somalia and South Sudan). The species was described and given its binomen by German physician Philipp Jakob Cretzschmar in 1828. Three subspecies are recognized. It is possibly no longer present in Sudan.

Since 1986, Soemmerring's gazelle has been classified as Vulnerable by the International Union for Conservation of Nature (IUCN).[2]

Taxonomy and evolution

Illustration of Soemmerring's gazelle (1867).

The scientific name of Soemmerring's gazelle is Nanger soemmerringii. Formerly considered member of genus Gazella within the subgenus Nanger before Nanger was elevated to genus status, Soemmerring's gazelle is one of members of the genus Nanger and is classified under the family Bovidae. The species was described and given its binomial name by German physician Philipp Jakob Cretzschmar in the In Rüppell, Atlas zu der reise im nördlichen Afrika ("Atlas of Rüppell's Travels in Northern Africa"; 1826–28) in 1828. Soemmerring's gazelle is named after German physicist Samuel Thomas von Sömmerring.[1]

Soemmerring's gazelle is more genetically related to Grant's gazelle (N. granti) and Thomson's gazelle (Eudorcas thomsonii) with Soemmering's gazelle being the closest relative of the two species.[3]

Subspecies

Traditionally, three subspecies are recognized:[1][4]

  • Nubian Soemmerring's gazelle (N. s. soemmeringii) (Cretzschmar, 1828)
  • Somali Soemmerring's gazelle (N. s. berberana) (Matschie, 1893)
  • Borani Soemmerring's gazelle (N. s. butteri) (Thomas, 1904)

The dwarf population on Dahlak Kebir island might also qualify as a subspecies.[4]

Physical description

Soemmerring's gazelle is a tall gazelle with tan flanks, gradually turning to white on the belly, and long black horns. They are about 75–90 cm (2.5–3.0 ft) at the shoulder, and they weigh 35–45 kg (77-99 lb).

Soemmerring's and Grant's gazelles' outward appearance are so similar, they are often mistaken for each other where their ranges overlap.[5]

Distribution and habitat

Soemmerring's gazelles is native to the Horn of Africa. It lives in Djibouti, Eritrea, Ethiopia, Somalia and South Sudan. However, it is extinct in Sudan. They inhabit open steppes with brush and acacia, as well as steppes with few trees. At some point in history, a Soemmerring's gazelle population became isolated on Dahlak Kebir island in the Dahlak Archipelago, where the gazelle actually developed a dwarf form of the larger mainland races.[4]

Ecology and behavior

Diet

The diet of the gazelle consists of acacia and bush leaves, grasses, and herbs.

Reproduction

Scientists suggest the males are temporarily territorial. The lifespan for this animal is up to 14 years.[6]

Threats

Soemmerring's gazelle is listed as Vulnerable in the IUCN Red List.[2]

In many parts of North Africa and the Middle East, large stone corrals were constructed to drive herds of gazelle into, making for an easy ambush. This method of hunting started in prehistoric time, and continued into the early part of the 20th century.

Most species of gazelles have been hunted for food over the course of history. Soemmerring's gazelles are very understudied due to their small numbers. In parts of their former range they are extinct due to hunting and habitat destruction.[2]

References

  1. ^ a b c Wozencraft, W. C. (2005). "Order Carnivora". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 532–628. ISBN 978-0-8018-8221-0. OCLC 62265494.
  2. ^ a b c d IUCN SSC Antelope Specialist Group (2016). "Nanger soemmerringii". IUCN Red List of Threatened Species. 2016: e.T63541A50197739. doi:10.2305/IUCN.UK.2016-2.RLTS.T63541A50197739.en. Retrieved 12 November 2021.
  3. ^ Peter Arctander; et al. (1996). "Extreme genetic differences among populations of Gazella granti, Grant's gazelle, in Kenya" (PDF). Heredity. 76 (5). Retrieved 31 December 2016.
  4. ^ a b c Chiozzi, G.; Bardelli, G.; Ricci, M.; De Marchi, G.; Cardini, A. (2014). "Just another island dwarf? Phenotypic distinctiveness in the poorly known Soemmerring's Gazelle, Nanger soemmerringii (Cetartiodactyla: Bovidae), of Dahlak Kebir Island". Biological Journal of the Linnean Society. 111 (3): 603–620. doi:10.1111/bij.12239.
  5. ^ "Soemmering's gazelle | mammal". Encyclopedia Britannica. Retrieved 2020-05-30.
  6. ^ "Soemmerring's Gazelle Facts and Information | SeaWorld Parks & Entertainment". seaworld.org. Retrieved 2020-05-30.

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Soemmerring's gazelle: Brief Summary

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Soemmerring's gazelle (Nanger soemmerringii), also known as the Abyssinian mohr, is a gazelle species native to the Horn of Africa (Djibouti, Eritrea, Ethiopia, Somalia and South Sudan). The species was described and given its binomen by German physician Philipp Jakob Cretzschmar in 1828. Three subspecies are recognized. It is possibly no longer present in Sudan.

Since 1986, Soemmerring's gazelle has been classified as Vulnerable by the International Union for Conservation of Nature (IUCN).

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