中文摘要：

2011年10月至2012年9月期间,于海南岛万泉河琼海段的沙洲岛开展外来物种红耳龟野外繁殖生态研究。通过笼捕等方法获得54个红耳龟样本,所有样本采用超声波技术检测其卵泡数量和大小。结果显示红耳龟的卵泡在9月开始生长发育,次年6月达到最大（16.6 mm±3.9 mm,n=39）,随后逐渐减小,各月卵泡直径平均值大于9.0 mm（6.0-33.7 mm,n=426）;卵泡数量于1月开始增加,3月份达到最多（45±4,n=4）,随后逐渐减少。推测研究区域内的红耳龟年繁殖频次为2.48窝/年。

英文摘要：

We carried out a field breeding ecological research of alien species,Trachmys scripta elegans,from October 2011 to September 2012 at Shazhou Island of Wanquan River（Hainan）.A total of 54 samples were obtained by trap.The number and size of follicles of the samples were detected by ultrasonic technique.The results showed that the average size of follicles was bigger than 9.0 mm（6.0 ~ 33.7 mm,n = 426） in each month.Follicles began to growth in September and reached a maximum size in June（16.6 mm ± 3.9 mm,n = 39） and maximum number in March（45 ± 4,n = 4）.Thus,we speculated that the breeding rate of T.scripta elegans is 2.48 clutches per year.