Development of Eggs and Larvae of Two Bitterlings, Rhodeus atremius and R.suigensis (Cyprinidae)

Abstract

The development of eggs and larvae of Rhodeus atremius and R.suigensis was observed under controlled water temperature of 22±1°C.The egges of R.atremius began to hatch about 36 hours after insemination, and those of R.suigensis in about 46 hours.The larvae of both species reached the free-swimming stage about 24 days after hatching.The larval development of both species was so similar that they are considered to be closely related species.