人工饲养对黄喉拟水龟繁殖力的影响

Effects of artificial rearing on fecundity of Mauremys mutica Cantor

在自然温度、人工环境及人工饲养条件下 ,黄喉拟水龟可以自然产卵 ,产卵高峰期在 5～ 6月份。产卵时间有逐年集中并前移的趋势。饲养 2年半中 ,产卵次数、产卵量及受精率逐年提高 ,产卵量增长了134 % ,受精率提高了 7.8% ,产卵次数增加了 99%。产卵高峰期、受精率高峰期与日粮需求高峰期时间一致。环境的适应及饲料的质和量是决定繁殖力高低的主要因子。

The study was carried out from April 1998 to August 2000, using wild turtle Maumerys mutica. Under artificial rearing conditions and nature temperature in Guangzhou (13.3～16.4℃), the turtles' laying peak appeared between May and June. The turtles had a trend to lay in a concentrative period and earlier than in the wild. The numbers of eggs, the fertilizing rate and the laying frequency increased by 134%, 7.8% and 99%, respectively, all going up gradually every year. The peaks of laying rate and fertilizing rate are coincident with the peak of ration requirement. Environment adaptability, feed quality and ration are the main factors affecting the reproduction of the turtles.