Observation on the Postembryonic Development of Abbottina rivularis

Abstract

The fertilized eggs of Abbottina rivularis hatched out after 124h at 19~23°C. Postembryonic development stages could have divided into larval stage I, larval stage II and larval stage III. The total length of newly hatched larvae is 3.32 to 4.67mm, and the length of the hair on the head is 0.048 to 0.168mm. The length of the hair on both sides of the body is 0.041 to 0.068 mm. The length of yolk sac is 0.62~ 1.21mm, and the short diameter is 0.26~0.41mm, and disappeared after 24~27h.