Artificial propagation of tank-cultured Chinese giant salamander (Andrias davidianus)

Published source details Xiao H.B., Liu J.Y., Yang Y.Q. & Lang X.Z. (2006) 水槽飼育した中国オオサンショウウオ(Andrias davidianus)の人工繁殖. Acta Hydrobiologica Sinica, 30, 533-539.
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This study is summarised as evidence for the following.

	Action	Category
	Amphibians: Use hormone treatment to induce sperm and egg release Action Link
	Use hormone treatment to induce sperm and egg release during captive breeding Action Link

Amphibians: Use hormone treatment to induce sperm and egg release
Use hormone treatment to induce sperm and egg release during captive breeding

A small, replicated, controlled study of captive Chinese giant salamanders Andrias davidianus in China (Xiao et al. 2006) found that injection with reproductive hormones induced egg and sperm production. Eggs were produced by 60% of females given injections of lutenizing hormone-releasing hormone-a or human chorionic gonadotrophin (400–500 eggs). However, mating was not observed. Eggs were laid earlier following injection with human chorionic gonadotrophin compared to lutenizing hormone-releasing hormone and earlier with higher water temperatures. A single injection was more effective than repeated injections. Females produced eggs between 96–120 hours and sperm was produced after 80 hours. A 1°C drop in water temperature resulted in a 10 hour delay. Animals not injected with hormones did not produce eggs or sperm and reproductive organs degenerated and were absorbed. Wild-caught salamanders were housed in 16 m² tanks.