The East African cheetah (Acinonyx jubatus jubatus), is a cheetah population in East Africa.[2] 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.
A cheetah from British East Africa was described by the American zoologist Edmund Heller in 1913. He proposed the trinomen Felis jubatus raineyi as a distinct subspecies.[3] It also was recognized as several other distinct subspecies, such as A. j. ngorongorensis and A. j. velox.[1] In 2017, the Cat Classification Task Force of the Cat Specialist Group subsumed A. j. raineyi to A. j. jubatus.[2]
In 2007, the total number of cheetahs in East Africa were
estimated at 1,960 to 2,572 adults and independent adolescents. East
African cheetahs form the second-largest population after the Southern
African cheetah. In 2007, there were between 569 and 1,007 cheetahs in
Tanzania, between 710 and 793 cheetahs in Kenya, between 40 and 295
cheetahs in Uganda and approximately 200 left in Somalia.[4]
Kenya is the main stronghold for the East African cheetah, with the
largest population of 800 to 1,200 adults in the country since 2015.[5]
In 2016, it was estimated that more than 1,000 individuals are resident
in the Serengeti/Maasai Mara ecosystem of Tanzania and Kenya.[6]
Formerly widespread in East Africa, the East African cheetah lost
a high percent of ranges and has gone extinct in three countries; the
eastern Democratic Republic of the Congo (the North Kivu province and the South Kivu province), Rwanda and Burundi.[4]
Taxonomy
In the 19th and 20th centuries, several cheetah type specimens from East Africa were described and proposed as subspecies:
- The Scottish zoologist Andrew Smith proposed the scientific name Felis fearsoni in 1834 for a specimen from the northeast of the Natalia Republic. The name was also spelled fearoni, fearonii or even fearonis by Leopold Fitzinger in 1869. Therefore, A. j. fearsoni was never accepted as a scientific name or a synonym.[7]
- In 1913, the American zoologist Edmund Heller described a cheetah under the trinomen Acinonyx jubatus raineyi, which had been shot by the American hunter Paul J. Rainey at the Ulu Station of Kapiti Plains in Kenya in 1911. The East African cheetah, also known as Rainey's cheetah was named in honor of Rainey.[8][9][10]
- Heller also proposed the scientific name Acinonyx jubatus velox for a cheetah shot by Kermit Roosevelt in June 1909 in the Loita Plains, near Narok in British East Africa. He called it African highland cheetah.[8] The skin is darker in color and has large black spots, which are more numerous than in raineyi's, and has the largest body size among cheetah zoological specimen.[9]
- In 1913, the German zoologist Max Hilzheimer proposed the name "Acinonyx jubatus ngorongorensis" for a type specimen from the Ngorongoro area in Tanzania.[11]
Other naturalists and zoologists also described cheetahs from other parts of East Africa that were all considered synonyms of A. j. raineyi.[12]
In 2005, the authors of Mammal Species of the World recognized A. j. raineyi and A. j. velox as valid taxa, and considered A. j. ngorongorensis synonymous with A. j. raineyi.[1]
In 2017, the Cat Classification Task Force of the Cat Specialist Group subsumed A. j. raineyi and A. j. velox to A. j. jubatus, thus recognizing only one subspecies in Southeastern and Southern Africa.[2]
Evolutionary history
The earliest African cheetah fossils from the early Pleistocene have been found in the lower beds of the Olduvai Gorge site in northern Tanzania.[7]
Not much was known about the East African cheetah's evolutionary
story, although at first, the East and Southern African cheetahs were
thought to be identical as the genetic distance between the two
subspecies is low.[13]
In the 1990s, it appeared from a DNA research that the East African
cheetah is a separate subspecies differing from the Southern African
cheetah.[14]
In early 2011, results of phylogeographic
genetic analysis on cheetah subspecies revealed more about the
distinctiveness and significant differences between cheetah subspecies,
revealing the connection between the East and Southern African
populations. The mitochondrial DNA data shows that the East African cheetah had no common haplotype
with the Southern African cheetah, although one haplotype consisting
cheetah populations from Tanzania and Kenya clustered with Southern
African cheetah. It was suggested that a population in East Africa might
be derived from a relatively recent re-colonization events. The mtDNA
study reveals that the divergence between the two populations occurred between 28,000 and 36,000 years ago.[15]
Physical characteristics
East African cheetahs measure around 110–135 cm (3.61–4.43 ft) in
head-and-body length and weigh between 70 and 75 kg (154 and 165 lb).
The males are usually larger than females. Measurements on wild cheetahs
in Tanzania were taken, and they can measure 200–220 cm (6.6–7.2 ft) in
length and weigh 50 and 60 kg (110 and 130 lb).[16] The largest have been recorded in Kenya.[8] Depth of skull and length of mandible are significantly larger in males.[7]
It is the second-palest after the Northwest African cheetah.
East African cheetahs have a white-yellowish coat to a tannish coat.
Their fur is usually shorter and leaner, and some can have a thick
coarse fur on the belly. It has many round black spots, some can be
found on the chests and neck, except on its white underside. The spots
merge toward the end of the tail to form four to fourteen dark rings
followed by a white tuft at the tip of the tail. Its tear marks run from
the corner of the eyes to the mouth which reduces the glare of sunlight
in its eyes, which is relatively thick. It also has a slighter build
than other African cheetahs.[17]
There have been reports about cheetahs of other color variations, such as melanism and ticked. A black (melanistic) cheetah was sighted in the Trans-Nzoia District
of Kenya in 1925. A ticked (spotless) cheetah was shot in Tanzania in
1921, it had only a few very small spots on the neck and back.[citation needed]
Distribution and habitat
A cheetah in the Serengeti National Park, Tanzania
In East Africa, cheetahs primarily live on scrub forests, grasslands, savannahs, open fields, steppes
and arid environments where preys are available, in which are suitable
to be the cheetahs' main hunting grounds. A few can also be found at
lakeshores and coastal areas, including mountain ranges. The cheetahs of
Amboseli National Park also live in arid deserts of Nyiri.[citation needed]
The cheetah's range has the highest density mostly in between northern Tanzania and southern Kenya.[4] The largest populations are mostly found at the Serengeti National Park, the Masai Mara National Reserve, Kora National Park and the Ngorongoro Crater from Tanzania and Kenya,[18][19]
as there were between 569 and 1,007 cheetahs in Tanzania and between
710 and 793 individuals in Kenya. In 2015, it is estimated that between
800 and 1,200 adult cheetahs reside in Kenya, making the country the
main stronghold for the vulnerable species in East Africa.[5] There are rare sightings of cheetahs at the Ngorongoro Conservation Area and in the Katavi National Park from southwest Tanzania.
Populations were estimated at around 40 to 295 cheetahs in Uganda as of 2007.[4] Cheetahs are resident in Kidepo Valley National Park in northern Uganda. It is estimated that only 20 individuals live in Kidepo since 2014.[20]
Former ranges
The East African cheetah has lost most of its historical range, such as in the North Kivu and South Kivu provinces of the Democratic Republic of the Congo, and in Virunga National Park. It might share borders with the Northeast African cheetah in Northeast Africa. It is regionally extinct in Rwanda and Burundi.[21]
Ecology and behavior
Reproduction and life cycle
Three young cheetahs in Maasai Mara, Kenya
Male cheetahs are sociable and often live in a group of other males called coalitions.[22] In the Serengeti, it was found that 41% of the adult males were solitary, 40% lived in pairs and 19% lived in trios.[23] Male cheetahs are territorial, and establish their territories by marking their territories by urinating on trees or logs.
The female cheetah's home ranges can be very large and a
territory including several females' ranges is impossible to defend.
Instead, males choose the points at which several of the females' home
ranges overlap, creating a much smaller space, which can be properly
defended against intruders while maximizing the chance of reproduction.
Coalitions will try their best to maintain territories to find females
with whom they will mate. The size of the territory also depends on the
available resources; depending on the habitat, the size of a male's
territory can vary greatly from 37 to 160 km2 (14 to 62 sq mi).[24]
Female cheetahs can reproduce at 13 to 16 months of age with an
average age of sexual maturity between 21 and 22 months. Cheetah cub
births mostly occurs during January to August in East Africa after 90 to
95 days of gestation.[7]
Hunting and diet
Cheetahs are diurnal animals (active mainly during the day), whereas the stronger apex predators, such as hyenas, African leopards and lions are nocturnal (active mainly at night). Hunting is the major activity throughout the day; peaks are observed during dawn and dusk indicating crepuscular tendencies.[22] Groups rest in grassy clearings after dusk, though males and juveniles often roam around at night.
In Kenya, cheetahs of the Masai Mara hunt after sunset to escape
the high temperatures of the day. In the Serengeti, they hunt when the
lions and hyenas are inactive. A study in Nairobi National Park
showed that the success of cheetah hunt depends on the species, age,
sex, and habitat of the prey, and the size of the hunting herd or the
efficiency of the hunting individual.[25]
It usually eats medium-sized or large mammalian herbivores, such as antelopes. It preys on impala, Grant's gazelle, gerenuk, wildebeest, waterbuck, hare and guineafowl. It even feeds on other large mammals, such as plains zebras and ostriches on few occasions. Its favorite prey is the Thomson's gazelle. The gazelle is found mostly in savannas, grasslands and open fields of the Serengeti ecosystem of Tanzania and the Masai Mara ecosystem of Kenya, where the cheetah can chase and catch its prey at full speed.
In Somalia, cheetahs feed on Soemmerring's gazelles. Historically, Speke's gazelles fell prey to the cheetahs, which were formerly the main prey of the cheetahs in semi-deserts and grass steppes of the Horn of Africa. It suffers from population decline and habitat degradation.
Enemies and competitors
Cheetahs
are threatened and outranked by larger predators in their area, as they
are known to be unable to defend themselves against these predators. In
the Serengeti ecosystem, they are highly threatened by East African lions,[26][27] as they can kill cheetahs, cause high-rate cheetah cub mortality, also steal their food.
Other predators such as African leopards, East African wild dogs and hyenas also threaten the cheetahs. Spotted and striped hyenas
frequently scavenges from the cheetah kills, and the cheetahs would
surrender their meals to the incoming hyenas without a fight.
Coalitions of male adult cheetahs can chase predators away. Even a single cheetah are also known to chase jackals and African golden wolves away from their territory or their food.
Threats
The cheetah is threatened by poaching, habitat loss and fragmentation.
Cheetahs in the Serengeti and the Maasai Mara are affected by
infectious disease, although it does not represent a major threat to the
free-roaming cheetahs of East Africa.[4]
Conservation
Three cheetahs at sunrise of western part of Maasai Mara, Kenya
The cheetah species is listed on Appendix I of CITES (Convention on International Trade in Endangered Species), Appendix I of CMS
(Convention on the Conservation of Migratory Species of Wild Animals)
and is protected under national legislation throughout most of its
extant and some of its former range.[4]
Despite the numerous reserves and national parks for the cheetah,
its population still is in decline. There are various conservation
projects in order to save the cheetah from extinction, such as the
Mara-Meru Cheetah Project, the Serengeti Cheetah Project, Action for
Cheetahs in Kenya and the Tanzania Cheetah Conservation Programme.[28]
There are no known East African cheetahs in captivity. Whipsnade Zoo
features displays that inform visitors about ZSL's cheetah conservation
project in Tanzania. Despite the conservation project is involved on
East Africa, the captive cheetahs of the zoo are actually Northeast
African cheetahs.[29]
In popular culture
Gallery
See also
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