Cervus

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Cervus
Temporal range: Late Miocene–Recent
Rothirsch.jpg
Cervus elaphus
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Cervidae
Subfamily: Cervinae
Tribe: Cervini
Genus: Cervus
Linnaeus, 1758
Type species
Cervus elaphus
Species
Also see text

Cervus is a genus of deer that primarily are native to Eurasia, although one species occurs in northern Africa and another in North America. In addition to the species presently placed in this genus, it has included a whole range of other species now commonly placed in other genera. Additionally, the species-level taxonomy is in a state of flux.

Contents

Taxonomy

Genus

Until the 1970s, Cervus also included the members of the genera Axis , Dama , and Elaphurus , and until the late 1980s, it included members of Rucervus and Rusa . [1]

Species

In the third edition of Mammal Species of the World from 2005, only the red deer (C. elaphus) and sika deer (C. nippon) were recognized as species in the genus Cervus. [1] Genetic and morphological evidence suggest more species should be recognized. [2] [3] For example, the species Cervus canadensis (elk/wapiti) is considered a separate species. [4]

Red deer species group

Within the red deer species group, some sources have recommended the Central Asian red deer (Cervus hanglu) should be treated as a species. [2] [4] [5] If the Central Asian red deer (from the Caspian Sea to western China) is recognized as a species, it includes the Yarkand deer and Bactrian deer (the two may be synonymous), but it could possibly also include the Kashmir stag, which has not been sampled in recent studies. [2] [4] If it is included in the Central Asian red deer, the scientific name of that species is C. hanglu. If it is not included, the scientific name of that species is C. yarkandensis, and the Kashmir stag (C. hanglu) may represent a separate monotypic species. [2] [4] The Central Asian red deer was considered its own species (including the Yarkand deer, Kashmir stag and Bactrian deer as subspecies) by the IUCN in 2017, [6] and by the American Society of Mammalogists in 2021. [7]

Others members of the red deer group, which may represent separate species, are C. corsicanus , C. wallichi and C. xanthopygus . [2] [3] If so, C. corsicanus includes the subspecies C. c. barbarus (perhaps a synonym of corsicanus), and is restricted to Maghreb in North Africa, Corsica and Sardinia. [2] [4] C. wallichi would probably include the subspecies C. w. kansuensis and C. w. macneilli (both are perhaps synonyms of C. w. wallichi), and would be found from Tibet to central China. [2] [4] [8] C. xanthopygus would probably include the subspecies C. x. alashanicus (perhaps a synonym of C. x. xanthopygus), and would be found from the Russian Far East to northeastern China. [2] [4] [8] This would restrict the "true" red deer (C. elaphus) to Europe, Anatolia, the Caucasus and northwestern Iran, and the elk/wapiti (C. canadensis) to North America and the Asian regions of the Tian Shan, Altai, and Great Khingan. [2] Alternatively, the barbarus group species are subspecies of the "true" red deer, while the C. wallichii and C. xanthopygus groups are subspecies of the elk/wapiti. [4]

Sika deer species group

It has been proposed that the sika deer should be split into four species based on genetics, morphology and voice, [3] although this may be premature based on the presently available evidence. [9] If split, the potential species are C. yesoensis from northern and central Japan (Hokkaido and northern and central Honshu), C. nippon of southern Japan (southern Honshu, Shikoku, Kyushu, Okinawa, Tsushima and other small islands), C. hortulorum of mainland Asia (the Russian Far East, Korea, central and eastern China and northern Vietnam), and C. taiouanus of Taiwan. [3]

Phylogeny

A 2014 mitochondrial DNA study showed the internal phylogeny of Cervus to be as follows: [10]

Cervus
West Eurasian clade

C. elaphus (European red deer)

C. hanglu (Central Asian red deer)

East Eurasian clade

C. albirostris (Thorold's deer)

C. nippon (Sika deer)

C. canadensis (Wapiti)

Rusa

Fossil species

Mating system

Members of the genus Cervus have polygynous mating systems within harems. [11] These harems consist of several males, numerous females and their young offspring 1–3 years in age [12] Members of this genus have a yearly breeding season where they display sensory exploitation, intrasexual competition, and weaponry. Females will fight for optimal mating opportunities and sexually selection for males with larger antler size and/or greater roar quality. [13] The degree of polygyny and female aggregation is dependent on the level of food distribution. Females aggregating in areas with more food leading to larger harems [14] Female distribution influences the level of polygyny.

Red deer Red deer portrait.jpg
Red deer

Female-female competition

Female-female competition has been observed within harems in the red deer species (Cervus elaphus) prior to and during the mating season. Aggression is displayed through nose threats, kicking, and displacements. Elevated aggression has only been observed during the breeding season. Competition can be for access to mates or reproductive resources such as food, or nesting areas. [13] Female-female aggression in ungulates is often overlooked because it is not as extravagant as male antler combat. Female conflicts occur so the winner has first access to the harem male at the start of the mating season before he is exhausted or low on sperm storage. [13]

Secondary sexual traits

While an emphasis in observations of sexual selection is placed on combat using antlers, males with higher roaring rates are also being selected for. During the breeding season males will make calls to attract mates and compete with other males. Like antler size, mating call quality is an indicator of mate potential. Red deer can distinguish the calls of the males in their harem, others and their offspring. [15]

Indirect benefits

Females select for males with larger antlers which indirectly benefits them. Large antler size in males is a sign of health and strength. The visual display is a reliable indicator of mate quality, providing indirect benefits. The females are not directly affected by these characteristics, but they will produce more viable and fit offspring. Males with large antlers mate and sire more offspring than smaller, younger males. Large antler size is correlated with overall health, fitness and an increase in sperm production and quality. [11]

Related Research Articles

<span class="mw-page-title-main">Sika deer</span> Species of deer native to much of East Asia

The sika deer, also known as the Northernspotted deer or the Japanese deer, is a species of deer native to much of East Asia and introduced to other parts of the world. Previously found from northern Vietnam in the south to the Russian Far East in the north, it is now uncommon except in Japan, where the species is overabundant.

<span class="mw-page-title-main">Eld's deer</span> Asia ruminant mammal species

Eld's deer, also known as the thamin or brow-antlered deer, is an endangered species of deer endemic to South Asia and Southeast Asia.

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

The red deer is one of the largest deer species. A male red deer is called a stag or hart, and a female is called a hind. The red deer inhabits most of Europe, the Caucasus Mountains region, Anatolia, Iran, and parts of western Asia. It also inhabits the Atlas Mountains of Northern Africa; its early ancestors are thought to have crossed over to Morocco, then to Algeria, Libya and Tunisia via the Strait of Gibraltar, becoming the only species of true deer (Cervidae) to inhabit Africa. Red deer have been introduced to other areas, including Australia, New Zealand, the United States, Canada, Peru, Uruguay, Chile and Argentina. In many parts of the world, the meat (venison) from red deer is used as a food source.

<span class="mw-page-title-main">Irish elk</span> Extinct species of deer

The Irish elk, also called the giant deer or Irish deer, is an extinct species of deer in the genus Megaloceros and is one of the largest deer that ever lived. Its range extended across Eurasia during the Pleistocene, from Ireland to Lake Baikal in Siberia. The most recent remains of the species have been carbon dated to about 7,700 years ago in western Russia.

<span class="mw-page-title-main">Sambar deer</span> Species of deer

The sambar is a large deer native to the Indian subcontinent and Southeast Asia that is listed as a vulnerable species on the IUCN Red List since 2008. Populations have declined substantially due to severe hunting, local insurgency, and industrial exploitation of habitat.

<span class="mw-page-title-main">Harem (zoology)</span> Animal group consisting of one or two males, a number of females and their offspring

A harem is an animal group consisting of one or two males, a number of females, and their offspring. The dominant male drives off other males and maintains the unity of the group. If present, the second male is subservient to the dominant male. As juvenile males grow, they leave the group and roam as solitary individuals or join bachelor herds. Females in the group may be inter-related. The dominant male mates with the females as they become sexually active and drives off competitors, until he is displaced by another male. In some species, incoming males that achieve dominant status may commit infanticide.

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

Thorold's deer is a threatened species of deer found in grassland, shrubland, and forest at high altitudes in the eastern Tibetan Plateau. It is also known as the white-lipped deer for the white patches around its muzzle.

<span class="mw-page-title-main">Kashmir stag</span> Deer subspecies

The Kashmir stag, also called hangul, is a subspecies of Central Asian red deer endemic to Kashmir and surrounding areas. It is found in dense riverine forests in the high valleys and mountains of Jammu and Kashmir and northern Himachal Pradesh. In Kashmir, it is found primarily in the Dachigam National Park where it receives protection, and elsewhere it is more at risk. In the 1941s, the population was between 3000 and 5000 individuals, but since then habitat destruction, over-grazing by domestic livestock and poaching have reduced population dramatically. Earlier believed to be a subspecies of red deer, a number of mitochondrial DNA genetic studies later had the hangul as a part of the Asian clade of the elk. The IUCN and American Society of Mammalogists, however, includes it in the new grouping of Central Asian red deer, with the Kashmir stag being the type subspecies. According to the census in 2019, there were only 237 hanguls.

<span class="mw-page-title-main">Bactrian deer</span> Subspecies of deer

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<span class="mw-page-title-main">Tibetan red deer</span> Subspecies of deer

The Tibetan red deer also known as shou, is a subspecies of elk/wapiti native to the southern Tibetan highlands and Bhutan. Once believed to be near-extinct, its population has increased to over 8,300, the majority of which live in a 120,000-hectare nature reserve established in 1993 in Riwoqê County, Qamdo Prefecture, Tibet Autonomous Region, China. Some have been kept at the beginning of the 20th century in London, and in a small zoo south of Lhasa.

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<span class="mw-page-title-main">Elk</span> Large antlered species of deer from North America and East Asia

The elk, or wapiti, is one of the largest species within the deer family, Cervidae, and one of the largest terrestrial mammals in its native range of North America and Central and East Asia. The word "elk" originally referred to the European variety of the moose, Alces alces, but was transferred to Cervus canadensis by North American colonists. The name "wapiti", derived from a Shawnee and Cree word meaning "white rump", is also used for C. canadensis.

<span class="mw-page-title-main">Central Asian red deer</span> Deer species

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<span class="mw-page-title-main">Tule elk</span> Subspecies of mammal

The tule elk is a subspecies of elk found only in California, ranging from the grasslands and marshlands of the Central Valley to the grassy hills on the coast. The subspecies name derives from the tule, a species of sedge native to freshwater marshes on which the Tule elk feeds. When the Europeans first arrived, an estimated 500,000 tule elk roamed these regions, but by 1870 they were thought to be extirpated. However, in 1874–1875 a single breeding pair was discovered in the tule marshes of Buena Vista Lake in the southern San Joaquin Valley. Conservation measures were taken to protect the species in the 1970s. Today, the wild population exceeds 4,000. Tule elk can reliably be found in Carrizo Plain National Monument, Point Reyes National Seashore, portions of the Owens Valley from Lone Pine to Bishop, on Coyote Ridge in Santa Clara Valley, San Jose, California and in Pacheco State Park and areas surrounding San Luis Reservoir near Los Banos, California.

<span class="mw-page-title-main">Altai wapiti</span> Subspecies of deer

The Altai wapiti, sometimes called the Altai elk, is a subspecies of Cervus canadensis found in the forest hills of southern Siberia, northwestern Mongolia, and northern Xinjiang province of China. It is different from the Tian Shan wapiti in being smaller and paler in color.

<span class="mw-page-title-main">Corsican red deer</span> Subspecies of deer

The Corsican red deer, also known simply as the Corsican deer or Sardinian deer, is a population of red deer found on the Mediterranean islands of Sardinia (Italy) and Corsica (France).

The Kansu red deer is a subspecies of wapiti found in the Gansu province of China. This subspecies forms, along with the closely related Sichuan deer, and Tibetan red deer, the southernmost wapiti group.

<i>Rucervus</i> Genus of mammals belonging to the deer, muntjac, roe deer, reindeer, and moose family of ruminants

Rucervus is a genus of deer from India, Nepal, Indochina, and the Chinese island of Hainan. The only extant representatives, the barasingha and Eld's deer, are threatened by habitat loss and hunting, and another species became extinct in 1938. The species of the genus Rucervus are characterized by a specific antler structure: its basal ramification is often supplemented with an additional small prong, the middle tine is never present, while the crown tines are inserted on the posterior side of the beam and may be bifurcated or fused into a small palmation.

References

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