Sika Deer
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| Cervus nippon Temminck, 1838 |
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C. n. dybowskii |
The Sika Deer (Cervus nippon) is a typical member of the family Cervidae inhabits much of East Asia living in mixed deciduous forests to the north, and mixed subtropical deciduous and evergreen forests to the south. The Sika Deer lies close in ancestry to Red Deer and may have given rise to the Central Asian Red Deer and Wapiti. It is absent from Hainan Island but its habitat does range from the Ussuri Region of Siberia southwards towards Korea, Manchuria and Northern and Southern China, with a possibly isolated population in Vietnam. It is also native to Taiwan and Japan and were possibly introduced to some other smaller western Pacific islands. The largest sika deer (occur to the north) are the Dybowski's Sika Deer (C. n. hortulorum is synonymous with C. n. dybowskii) of Manchuria and Ussuri Region, and the Hokkaidō Sika Deer (C. n. yesoensis) of Hokkaidō Island in Japan. The Kerama Sika Deer (C. n. keramae) of the Ryūkyū Islands is one of the smallest, and unlike other subspecies, the whole body (including the rump patch) is dark brown. The Formosan Sika Deer (C. n. taioanus) is rather large for an island form being larger than the Kerama Sika Deer and similar in size to deer from Southern China. There are several geographically separated subspecies, but due to the long history of the velvet antler trade (for medicinal values) and farming of Sika deer for antler production in much of Turkestan, China, Mongolia, Manchuria, and the Ussuri Region, the integrity of these subspecies is questionable as many populations have already mixed gene pools. Other deer raised for antler trade were various Central Asian Red Deer (Cervus affinis) and Wapiti (Cervus canadensis) subspecies. Sika deer are known to escape deer farms and many of the so-called wild sika deer populations in Central and Southern China are descendants of those that have escaped and have re-established themselves in the wild. In Taiwan, both Formosan Sika Deer and Formosan Sambar Deer (Cervus unicolor swinhoei) have been farmed for velvet antlers. The only exceptions that may have integrity as a subspecies are possibly the Dybowski's Sika deer of Manchuria and Ussuri region, and the sika deer subspecies that survive in Japan, Ryūkyū Islands, and Taiwan. Japan is the only country in Eastern Asia where sika deer were not farmed for velvet antler.
Sika Deer are widespread in Japan, and readily become tame; at one time they were regarded as sacred. The largest wild populations are in the northern island of Hokkaidō. Following Japanese settlement of Hokkaidō in the latter half of the 19th century, the deer there were hunted almost to the point of extinction, and were reduced to a few small populations. Legal protection put in place in the mid 20th century was followed by rapid population recovery from the 1950s to the 1980s. In the absence of the natural predators (wolves, now extinct in Japan), some hunting is now encouraged in order to stabilize the population and limit the agricultural damage done by the deer. The present Hokkaidō deer population is still concentrated in the eastern half of the island, and many deer that frequent other parts of the island migrate back to this area during the winter months.
Deer are also present in the more populated islands of Japan: for example, in the ancient capital city of Nara, as well as the sacred island of Miyajima, they wander at will among the temples, and are much photographed (and fed) by tourists. In other parts of Asia, the deer have also been extensively hunted, and legal protection has been less effective, so that several populations and subspecies are now endangered.
Sika Deer have been introduced into a number of other countries including Australia, Austria, Denmark, Germany, Britain, France, Ireland, Jolo Island (south of the Philippines), New Zealand, Poland, Morocco and the United States (Maryland). In many cases they were originally introduced as ornamental animals in parkland, but have established themselves in the wild.
In Britain several distinct wild populations now exist. Some of these are in isolated areas, for example on the island of Lundy, but others are contiguous with populations of the native Red Deer. Since the two species hybridise, this is a serious conservation concern.
Sika, romanized shika in the Hepburn system, is the Japanese word for deer in general. The full Japanese word for Cervus nippon is nihonjika.
Dybowski's sika deer (Cervus nippon dybowskii) and Formosan sika deer (Cervus nippon taioanus) are highly endangered and possibly already extinct in the wild. They can be found in several zoos and are being kept alive by a captive-management program.
The Sitka Deer is a subspecies of Black-Tailed Deer and Mule Deer and therefore, a different species.
[edit] See also
- Red Deer - European Red Deer
- Central Asian Red Deer - Asian/Himalayan/Tibetan Red Deer
- Wapiti - East Asian/North American Red Deer (Wapiti)
- Thorold's Deer
[edit] References
- Deer Specialist Group (1996). Cervus nippon. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006.
- Cervus nippon (TSN 180696). Integrated Taxonomic Information System. Accessed on 10 February 2006.
- Igota, H., Sakagura, M., Uno, H., Kaji, K., Maneko, M., Akamatsu, R., & Maekawa, (in press). Seasonal patterns of female sika deer in eastern Hokkaidō, Japan. Ecological Research, 19.
