멸종위기어류 흰수마자의 난발생 및 초기생활사 연구는 생물학적 특성 및 복원을 위한 기초자료를 확보하기 위해 실시하였다. 성숙난은 암컷에 Ovaprim을 주사(0.5 mL/kg)하여 얻었으며 건식법으로 인공수정시켰다. 성숙란은 회색의 분리 침성난이었으며, 산란수는 $1,015{pm}199$개, 난경은 $0.74{pm}0.08mm$였다. 수정난은 수온 $23^{circ}C$에서 수정 후 9시간 30분 동안 $2.94{pm}0.10mm$까지 지속적으로 커졌고, 26시간 후에 부화하였으며, 부화직후 전기자어는 전장 $3.4{pm}0.07mm$였다. 부화 후 3일에는 전장 $4.4{pm}0.1mm$로 난황을 모두 흡수하였으며 먹이를 섭식하기 시작하였고, 부화 후 13일째에는 전장 $6.8{pm}0.50mm$로 모든 지느러미 기조가 정수가 되어 치어기로 이행하였다. 부화 후 80일에는 전장 $27.7{pm}2.32mm$로 체형과 체측반문이 비교적 성어와 유사하였다.
Egg development and early life history of the endangered species, Gobiobotia naktongensis were investigated to provide basic information regarding biological characteristics and restoration. Eggs were obtained from the females with Ovaprim (0.5 mL/kg) injecting and then fertilized using the dry method in the laboratory. Number of spawned eggs were $1,015{pm}199$. Spawned eggs were strongly adhesive, opaque and grayish and measured $0.74{pm}0.08mm$ (mean${pm}$SD) in diameter. Fertilized egg size continuously increase until $2.94{pm}0.10mm$ for 9 h 30 min at $23^{circ}C$. Fertilized eggs hatched 26 h after fertilization, and newly hatched larvae an average were $3.4{pm}0.07mm$(TL). The yolk sacs of the larvae were of most absorbed of 3 days after hatching and $4.4{pm}0.1mm$ (TL). About at 13 days after hatching, they became to juvenile stage and reached $16.8{pm}0.50mm$ (TL). At 80 days after hatching, the band patterns and external form of juveniles were similar to those of adults, and they averaged $27.7{pm}2.32mm$(TL).
