Red hartebeest

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Red hartebeest
2011-Red-Hartebeest.jpg
At Etosha National Park, Namibia
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Subfamily: Alcelaphinae
Genus: Alcelaphus
Species:
Subspecies:
A. b. caama
Trinomial name
Alcelaphus buselaphus caama
Alcelaphus caama 4.png
Distribution of red hartebeest (in orange)
Synonyms

Alcelaphus buselaphus caamaG. Cuvier, 1804

The red hartebeest (Alcelaphus buselaphus caama), also called the Cape hartebeest or Caama, is a subspecies of the hartebeest found in Southern Africa. More than 130,000 individuals live in the wild. The red hartebeest is closely related to the tsessebe and the topi.

Contents

Alcelaphus buselaphus caama is a large African antelope of the family Bovidae, one of ten subspecies; it is sometimes treated as a separate species, A. caama. Commonly known as the red hartebeest, it is the most colorful hartebeest, with black markings contrasting against its white abdomen and behind. It has a longer face that other subspecies, with complex curving horns joined at the base. [4] The average weight of a male is about 150 kg, and female is 120 kg. Their average shoulder height is 135 cm, and horns are 60 cm long. The life expectancy of a red hartebeest is around 19 years. [5] Little sexual dimorphism is noted between males and females, showing no distinct identifiable physical features, but body size is slightly affected. Horn size, however, expresses more dimorphism between males and females, as males fight and defend themselves for sexual selection. Thus, male skull weight and circumference is slightly greater than that of the female. [6] Hartebeests have an excellent sense of hearing and smell, although their sense of sight is poor. When alarmed, hartebeests flee, reaching a maximum speed of 55 km/h. Their evasion tactic is to induce confusion by running in a zigzag pattern, making it difficult for predators to catch them. [7]

Life cycle

Breeding

A. buselaphus subspecies have a gestation period of eight months, and they give birth to single calves. They typically give birth in a seasonal pattern before the summer rain begins. After birth, calves are hidden in dense vegetation before joining a group to increase their chances of survival from predators, since they are weak. [8] Most females begin breeding after the age of two, and can conceive again 9 or 10 months after giving birth. [9]

Diet

Red hartebeests are grass feeders, which is evidenced by their long snouts, which give the advantage of an improved cropping ability to acquire and masticate grasses more efficiently. During the rainy season in southern Africa, the grass species Andropogon is in abundance and is the main source of dietary consumption. [10] As grazers, their diets fluctuate seasonally, as they consume higher-quality, green primary production in wet seasons, and lower-quality sheath material in the dry seasons. [11] Hartebeests are considered less water-dependent than most alcelaphines, only needing to drink water when melons and tubers are inaccessible. [11]

Predators

The few carnivores preying on hartebeest in southern Africa include lions, spotted hyenas, leopards, and cheetahs. Nile crocodiles may opportunistically prey upon hartebeest that drink from waters inhabited by the reptiles; though this is uncommon, it is not unheard of. Furthermore, hartebeest are not a primary food source for any of these species, and least of all for cheetahs. On average, out of their entire diet, lions only consume hartebeest about 7% of the time; leopards, 6.25%; hyenas, 3.5%; cheetah consumption of hartebeest makes up only about 1.75% of their total diet. Cheetahs tend to target smaller gazelle species (primarily Thomson’s gazelle or springbok) to medium-sized antelope, such as impala or Grant’s gazelle. When hartebeest are hunted by lions, the felines typically prey on adult males, while both spotted hyenas and leopards tend to prey on vulnerable young calves. These predatory habits are likely attributed to the difficulty of catching nomadic hartebeests, as well as the better success hyenas and leopards have with catching calves. [12] Hartebeest, topi, tsessebe and their relatives are also thought to have “oily” and unpalatable meat, at least to some predators. Additionally, their hides are often covered in oily secretions from their preorbital glands and pheromones/scent-marking behaviors. Wildebeest are by far the most favoured prey species of the entire group.

Environmental threats

Hunting is always an issue to consider in rural areas, since little enforcement of animal protection laws is possible, or there can be no established regulations at all. Hunting hartebeests for survival is an ancient practice: persistence hunting in the hottest part of the day was most common, when hunters could catch the animal at its weakest point. Over the past 20 years, however, one of the only places where persistence hunting still occurs is in central Kalahari. [13]

Habitat and demographics

The red hartebeest is primarily found in southwestern Africa. Southern Africa's dissected topography, geologic diversity, climate oscillations, and mosaic of distinct vegetation types has been the primary means for radiation and diversification amidst hartebeest species, which has led red hartebeests to vary slightly in their capacity to consume the diets they do. [11] Most ungulates in Africa are nomadic, as they are dependent on food sources that become depleted if they stay in one place. A. buselaphus lives in herds in open plains and scrublands in the sub-Saharan African climate. [4]

Evolutionary history

In the early 1900s, "antelope" was a very broad, ambiguous name given to most hollow-horned ruminants besides oxen, sheep, and goats. Of these antelopes found in Africa, Asia, and Europe, Africa has the most diverse populations of antelopes, with horn lengths ranging from six feet long, to a quarter of an inch. [14] A. b. caama, from the family Bovidae, used to be categorized as the subfamily of Bubalinae, but are now classified under the subfamily Alcelaphini. [15] This youngest of all African bovid subfamilies dates back 5 million years ago, and has exhibited great diversification. The oldest fossil of Alcelaphus has been dated to 740,000 years ago. Besides Alcelaphus, the three other genera from the Alcelaphini are Beatragus, Connochaetes, and Damaliscus . Over millions of years, the Alcelaphini have diversified to fill certain niches and have spread to different habitats across the continent of Africa. The genus Alcelaphus is suggested to have evolved and diversified due to climate variability over a range of habitats in the Pleistocene era. About 500,000 years ago, the Alcelaphini diverged into northern and southern clades, while the northern clade diverged once more into eastern and western lineages 400,000 years ago. The species Alcelaphus caama originated from the southern clade, also including lichtensteinii, in Namibia. The northern clade comprises the rest of the hartebeest complex.

Diversification of these species has been solely attributed to environmental and habitat changes due to global warming around 250 to 195 thousand years ago, and global cooling 175 to 125 thousand years ago. [16]

Related Research Articles

<span class="mw-page-title-main">Alcelaphinae</span> Subfamily of mammals

The subfamily Alcelaphinae, of the family Bovidae, contains the wildebeest, tsessebe, topi, hartebeest, blesbok and bontebok, and several other related species. Depending on the classification, there are 6–10 species placed in four genera, although Beatragus is sometimes considered a subgenus of Damaliscus, while Sigmoceros is sometimes considered for the Lichtenstein's hartebeest.

<span class="mw-page-title-main">Common tsessebe</span> Subspecies of the subfamily Alcelaphinae in the family Bovidae

The common tsessebe or sassaby is the southern, nominate subspecies of Damaliscus lunatus, although some authorities have recognised it as an independent species. It is most closely related to the Bangweulu tsessebe, sometimes also seen as a separate species, less to the topi, korrigum, coastal topi and tiang subspecies of D. lunatus, and less to the bontebok in the same genus. Common tsessebe are found in Angola, Zambia, Namibia, Botswana, Zimbabwe, Eswatini, and South Africa.

<span class="mw-page-title-main">Hartebeest</span> Grassland antelope

The hartebeest, also known as kongoni or kaama, is an African antelope. It is the only member of the genus Alcelaphus. Eight subspecies have been described, including two sometimes considered to be independent species. A large antelope, the hartebeest stands just over 1 m at the shoulder, and has a typical head-and-body length of 200 to 250 cm. The weight ranges from 100 to 200 kg. It has a particularly elongated forehead and oddly-shaped horns, a short neck, and pointed ears. Its legs, which often have black markings, are unusually long. The coat is generally short and shiny. Coat colour varies by the subspecies, from the sandy brown of the western hartebeest to the chocolate brown of the Swayne's hartebeest. Both sexes of all subspecies have horns, with those of females being more slender. Horns can reach lengths of 45–70 cm (18–28 in). Apart from its long face, the large chest and the sharply sloping back differentiate the hartebeest from other antelopes. A conspicuous hump over the shoulders is due to the long dorsal processes of the vertebrae in this region.

<span class="mw-page-title-main">Lichtenstein's hartebeest</span> Species of mammal

Lichtenstein's hartebeest is a subspecies of the hartebeest antelope that dwells in savannahs and floodplains of Southeastern-Central Africa. It is sometimes classified as a unique species, Sigmoceros lichtensteinii.

<span class="mw-page-title-main">Gerenuk</span> Long-necked species of antelope (Litocranius walleri)

The gerenuk, also known as the giraffe gazelle, is a long-necked, medium-sized antelope found in parts of East Africa. The sole member of the genus Litocranius, the gerenuk was first described by the naturalist Victor Brooke in 1879. It is characterised by its long, slender neck and limbs. The antelope is 80–105 centimetres tall, and weighs between 18 and 52 kilograms. Two types of colouration are clearly visible on the smooth coat: the reddish brown back or the "saddle", and the lighter flanks, fawn to buff. The horns, present only on males, are lyre-shaped. Curving backward then slightly forward, these measure 25–44 cm.

<span class="mw-page-title-main">Dorcas gazelle</span> Species of mammal

The dorcas gazelle, also known as the ariel gazelle, is a small and common gazelle. The dorcas gazelle stands about 55–65 cm at the shoulder, with a head and body length of 90–110 cm and a weight of 15–20 kg. The numerous subspecies survive on vegetation in grassland, steppe, wadis, mountain desert and in semidesert climates of Africa and Arabia. About 35,000–40,000 exist in the wild.

<span class="mw-page-title-main">Thomson's gazelle</span> Species of gazelle

Thomson's gazelle is one of the best known species of gazelles. It is named after explorer Joseph Thomson and is sometimes referred to as a "tommie". It is considered by some to be a subspecies of the red-fronted gazelle and was formerly considered a member of the genus Gazella within the subgenus Eudorcas, before Eudorcas was elevated to genus status.

<span class="mw-page-title-main">Chinkara</span> Species of mammal

The chinkara, also known as the Indian gazelle, is a gazelle species native to India, Iran, Afghanistan And Pakistan.

<span class="mw-page-title-main">Giant sable antelope</span> Rare subspecies of the sable antelope

The giant sable antelope or royal sable antelope, also known in Portuguese as the palanca-negra-gigante, is a large, rare subspecies of the sable antelope native and endemic to the region between the Cuango and Luando Rivers in Angola.

<span class="mw-page-title-main">Red-fronted gazelle</span> Species of mammal

The red-fronted gazelle is widely but unevenly distributed gazelle across the middle of Africa from Senegal to northeastern Ethiopia. It is mainly resident in the Sahel zone, a narrow cross-Africa band south of the Sahara, where it prefers arid grasslands, wooded savannas and shrubby steppes.

<i>Damaliscus lunatus</i> Species of the subfamily Alcelaphinae in the family Bovidae

Damaliscus lunatus is a large African antelope of the genus Damaliscus and subfamily Alcelaphinae in the family Bovidae, with a number of recognised geographic subspecies. Some authorities have split the different populations of the species into different species, although this is seen as controversial. Common names include topi, sassaby, tiang and tsessebe.

<span class="mw-page-title-main">Bubal hartebeest</span> Extinct subspecies of African grassland antelope

The bubal hartebeest, also known as northern hartebeest or bubal antelope or simply bubal is the extinct nominal subspecies of hartebeest. It was formerly found north of the Saharan Desert. Other subspecies live currently in grasslands south of the Sahara, from Senegal in the west to Eritrea and Ethiopia in the east and down to central Tanzania. The red hartebeest and Lichtenstein's hartebeest, alternatively considered subspecies or sister species of the common hartebeest, are present in southern Africa.

<span class="mw-page-title-main">Coke's hartebeest</span> Species of antelope

Coke's hartebeest or Kongoni is a large migratory antelope that is native to Kenya and Tanzania.

<span class="mw-page-title-main">Lelwel hartebeest</span>

The Lelwel hartebeest, also known as Jackson's hartebeest, is an antelope native to Central African Republic, Chad, the Democratic Republic of the Congo, Ethiopia, Kenya, Sudan, Tanzania, and Uganda.

<span class="mw-page-title-main">Western hartebeest</span> Subspecies of hartebeest

The western hartebeest is an antelope native to the medium to tall grassland plains of Benin, Burkina Faso, Cameroon, the Central African Republic, Chad, Côte d'Ivoire, Ghana, Guinea, Guinea-Bissau, Mali, Niger, Nigeria, Senegal, and Togo. It is possibly extirpated from Gambia.

<span class="mw-page-title-main">Swayne's hartebeest</span>

Swayne's hartebeest is an endangered antelope native to Ethiopia. Two of the largest remaining populations are located in Senkelle Swayne's Hartebeest Sanctuary, Nechisar National Park and Maze National Park. It has been extirpated from Somalia. It is named after British officer H. G. C. Swayne (1860–1940).

Maze National Park is a national park in the Southern Nations, Nationalities, and People's Region of Ethiopia. It is located 460 km southwest of Addis Ababa and 248 km from Hawassa. It covers 210 square kilometers or 2020 hectare. Maze was founded in 2005, and is managed by the Ethiopian Wildlife Conservation Authority.

<span class="mw-page-title-main">Ruma National Park</span> National park Nyanza Province, Kenya

Ruma National Park is the only terrestrial park in Kenya's Nyanza Province. Dubbed the "Last Retreat of the Roan Antelope", the park protects the only indigenous population of rare roan antelopes within Kenya. At present, the population is on the verge of extinction with individual populations numbering approximately 40. The park was established in 1966 as Lambwe Valley Game Reserve. It was later renamed “Ruma” after one of Kenya's most powerful wizard, the much feared Gor Mahia who lived around the park. The park is located in the vast Lambwe Valley.

<span class="mw-page-title-main">East African cheetah</span> Subspecies of carnivore

The East African cheetah, is a cheetah population in East Africa. It lives in grasslands and savannas of Tanzania, Kenya, Uganda and Somalia. The cheetah inhabits mainly the Serengeti ecosystem, including Maasai Mara, and the Tsavo landscape.

<span class="mw-page-title-main">Southern miombo woodlands</span>

The Southern miombo woodlands is a tropical grasslands and woodlands ecoregion extending across portions of Malawi, Mozambique, Zambia, and Zimbabwe.

References

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