Mauremys reevesii, commonly known as the Chinese pond turtle, the Chinese three-keeled pond turtle, or Reeves' turtle, is a
species of
turtle in the
familyGeoemydidae, a family which was formerly called Bataguridae.[2] The species is native to East Asia.
It is one of the two most commonly found species used for
divination that have been recovered from
Shang dynasty sites.[4]
Geographic range
Mauremys reevesii is native to
China and
Korea, and is thought to have been introduced to
Japan and
Taiwan in historic times; it was previously thought to be native to both these regions. The species is thought to have been introduced to Japan from the Korean Peninsula near the end of the 18th century. Introduced populations of M. reevesii may serve as a threat to the native turtles of these regions due to its propensity for hybridization.[2][5][6][7]
Habitat and behaviour
M. reevesii is semiaquatic, and basks in the sun on rocks or logs and can often be found leaving water to do so. They can usually be found in marshes, relatively shallow ponds, streams, and canals with muddy or sandy bottoms.
This species, Mauremys reevesii, is notorious for its ability to produce
hybrids with other Geoemydidae, even species that are only distantly related. The supposed new species "Mauremys pritchardi " was based on a hybrid of unknown origin between a male of this species and a female
yellow pond turtle (Mauremys mutica). Furthermore, it has hybridized with the
Chinese stripe-necked turtle (Ocadia sinensis), female
Malayan box turtles (Cuora amboinensis), a male
four-eyed turtle (Sacalia quadriocellata), and the
Japanese pond turtle (Mauremys japonica) in captivity.[11][12] This hybridization may pose a threat to the populations of native M. mutica and
Chinese stripe-necked turtle (M. sinensis) in
Taiwan, and the
endemicM. japonica in
Japan.[7]
Any individuals that are available as pets therefore need to be kept separate from other members of the family.
Farming
High demand for turtle plastrons for
Shangdivination rites and archaeological findings of large caches of turtle shells has led some scholars to speculate that Mauremys reevesii may have been farmed for this purpose in antiquity.[13]
M. reevesii is one of the species raised on China's modern-day
turtle farms. According to a 1998 survey, 548 farms raised this turtle species in four provinces in China.
The statistical data from different provinces were in different formats; however, two provinces reported 20,650 turtles living on 26 farms, with 5,000 animals reproduced annually; the other two provinces reported the total weight of their turtles, namely some 260 tons of these animals on 522 farms. Over the five-year period, 1990–1995, 13 traditional Chinese medicine factories consumed 430 tons of C. reevesii plastrons.[14]
Based on a more recent (2002) survey of 684 Chinese turtle farms (less than half of all 1,499 turtle farms that were registered at the time), researchers found that 2.8 million of turtles of this species (reported there as Chinemys reevesii) lived on these farms, with some 566,000 specimens sold by farmers every year. The total weight of the annual product was 320 tons, with the estimated value of over US$6 million, which makes the market value of a Chinese pond turtle equal to around $12—about twice as much that of the most common farmed species, Pelodiscus sinensis. Taking into account the registered farms that did not respond to the survey, as well as the unregistered producers, the total amounts must be considerably higher.[15]
Pet trade
Chinese pond turtles are also farmed for the pet trade. In captivity, they require similar care to
red-eared sliders (T. s. elegans).
East Timor
During surveys in
East Timor (Timor-Leste), a small but well-established population of M. reevesii was found living in marshes near the city of
Dili. The species is not native to the island and was possibly
introduced by locals of Chinese origin.[16] East Timor is home to the
Roti Island snake-necked turtle (Chelodina mccordi), more specifically the
subspeciesC. m. timorensis (sometimes considered a species of its own). Although the introduced population of M. reevesii is not known to present a risk to the native turtles per se, they could indirectly present a threat to the natives if confused. M. reevesii from the introduced population are sometimes captured to be sold to people of Chinese origin and this may cause problems if extended to the native turtles.[16] A potential solution is to remove the introduced M. reevesii (thereby restricting the trade to captive farmed M. reevesii).[16]
^Keightley, David N. (1978). Sources of Shang history : the oracle-bone inscriptions of Bronze Age Chin (2 ed.). Berkeley ; London: University of California Press. p. 9.
ISBN0-520-05455-5.
^da Nóbrega Alves, Rômulo Romeu; da Silva Vieira; Washington Luiz & Gomes Santana, Gindomar (2008): Reptiles used in traditional folk medicine: conservation implications. Biodiversity and Conservation17(8): 2037–2049.
doi:
10.1007/s10531-007-9305-0 (HTML abstract, PDF first page)
^Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp.
ISBN978-1-4214-0135-5. (Chinemys reevesii, p. 218).
^* Parham, James Ford; Simison, W. Brian; Kozak, Kenneth H.; Feldman, Chris R. & Shi, Haitao (2001): New Chinese turtles: endangered or invalid? A reassessment of two species using mitochondrial DNA, allozyme electrophoresis and known-locality specimens. Animal Conservation4(4): 357–367.
PDF fulltextArchived 24 July 2008 at the
Wayback MachineErratum:Animal Conservation5(1): 86
HTML abstract
^Buskirk, James R.; Parham, James F. & Feldman, Chris R. (2005): On the hybridisation between two distantly related Asian turtles (Testudines: Sacalia × Mauremys). Salamandra41: 21-26.
PDF fulltext
^Keightley, David N. (1978). Sources of Shang history : the oracle-bone inscriptions of Bronze Age Chin (2 ed.). Berkeley ; London: University of California Press. p. 12.
ISBN0-520-05455-5.
^Shi, Haitao; Parham, James F; Fan, Zhiyong; Hong, Meiling; Yin, Feng (1 January 2008), "Evidence for the massive scale of turtle farming in China", Oryx, vol. 42, Cambridge University Press, pp. 147–150,
doi:10.1017/S0030605308000562
Gray JE (1831). Synopsis Reptilium; or Short Descriptions of the Species of Reptiles. Part I.—Cataphracta. Tortoises, Crocodiles, and Enaliosaurians. London: Treuttel, Wertz, and Co. viii + 85 pp. (Emys reevesii, new species, pp. 73–74). (in English and Latin).