Chinese Giant Salamanders (Andrias davidianus) have experienced an 80% population decline since the 1950s. Captive salamander farms in China might provide a source population for reintroduction projects involving this species. To provide recommendations on rearing individuals for reintroduction, we studied the effect of water temperature on the growth of captive-reared juvenile (2–6 yr) A. davidianus and compared their body condition with wild specimens. We reared 240 salamanders in two groups, exposed them to different water temperatures for 7 mo, and monitored their growth over the next 3 yr. Subjects that were exposed to lower water temperatures (0.8–19.4°C) were lighter and shorter than those maintained at higher temperatures (7.8–19.1°C). Furthermore, subjects maintained at lower temperatures had a lower growth rate than those maintained at higher temperatures, except for the interval between the last two measurements. Captive-reared salamanders had lower body-condition indices than wild animals having the same body length during the study period. Captive subjects were 16% and 19% lighter than wild individuals of the same length when maintained in the high- and low- temperature groups, respectively. Our study indicates that water temperature affected juvenile growth, and captive-reared A. davidianus older than 5 yr had a body-condition index approaching that of individuals in the wild.
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1 December 2014
The Effect of Water Temperature on the Growth of Captive Chinese Giant Salamanders (Andrias davidianus) Reared for Reintroduction: A Comparison With Wild Salamander Body Condition
Lu Zhang,
Andrew Kouba,
Qijun Wang,
Hu Zhao,
Wei Jiang,
Scott Willard,
Hongxing Zhang
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Herpetologica
Vol. 70 • No. 4
December 2014
Vol. 70 • No. 4
December 2014
Aquatic salamander
conservation
Cryptobranchidae
energy allocation