摘要
报道了在自然条件下太行隆肛蛙(Feirana taihangnicus)早期胚胎发育的过程。根据胚胎外部形态变化、主要生理特征及行为的出现,其早期胚胎发育过程可划分为25个时期。在水温11.0～18.0℃下,从受精卵形成至蝌蚪两侧鳃盖完全闭合、出水管形成为止,共历时470.18 h。卵裂开始时集中在动物极顶端,直到囊胚早期植物极才出现分割线;胚体的出膜时间集中在右侧鳃盖闭合期,出膜后即具备主动取食的能力,属于晚出膜类型;隐蔽的产卵环境、特殊的卵群附着方式以及大卵径、高卵黄量,是太行隆肛蛙对低温条件下早期胚胎发育时程长的生态适应。
The early embryonic development of Feirana taihangnicus was studied.The whole process,from fertilization to spiracle formation,took 470.18 hours under water temperature of 11-18℃ and the process was divided into 25 stages according to the embryonic morphological,physiological and behavioral characteristics.Cleavage began from the top of animal hemisphere,and the cleavege furrows of vegetal pole were observed at early stage of blastula.The hatching occurred mainly at the stage of opercular fold closure on the right side.The time of hatching was late.The newly hatched tadpoles can self-feeding.Hidden spawning environment,special attachment of egg masses,big egg diameter and large amount of yolk in the eggs indicated the ecological adaptations to long course of early development under the low water temperature in F.taihangnicus.
出处
《动物学杂志》
CAS
CSCD
北大核心
2010年第5期39-46,共8页
Chinese Journal of Zoology
基金
国家自然科学基金项目(No.30870277)部分资助
关键词
太行隆肛蛙
早期胚胎发育
生态适应性
Feirana taihangnicus
Early embryonic development
Ecological adaptation
