Development of the Bitterling Rhodeus uyekii (Cyprinidae), with a Note on Minute Tubercles on the Skin Surface

Abstract

The development of eggs and larvae, and minute tubercles on the skin surface of larvae of Rhodeus uyekii were observed.The egg and larval development, and minute tubercles on the skin surface of larvae of this species were relatively similar to those of two subspecies, R.atremius atremius and R.atremius suigensis.This species in larval development is characterized by having a yolk sac, which is laterally slender and convex downward at the posteriormost portion, and numerous vestigial minute tubercles on the skin surface except for the wing-like yolk projection.