멸종위기 어류 꾸구리 Gobiobotia macrocephala의 난발생 및 초기생활사

Abstract

Early life history of the endangered species, Gobiobotia macrocephala was investigated to provide baseline data for biological characteristics and recovery. Adult fish were sampled by spoon net at Hongcheon-gun, Gangwon-do, Korea in April to June 2010. The female’s eggs were obtained by injecting Ovaprim and fertilized by dry method in the laboratory. The mature eggs were slightly adhesive and transparent with greyish and average 0.89±0.04 mm in diameter. The hatching of the embryo took place in about 107 hours after fertilization under water temperature of 23 C and newly hatched larvae were average 4.6±0.16 mm in total length. At 4 days after hatching, they were average 6.1±0.20 mm in total length and their yolk sacs were completely absorbed. From 15 days after hatching,they entered the juvenile stage and reached at 8.6±0.67 mm in total length. At the 100 days after hatching, their band patterns and external form were similar to those of adults, and they averaged 31.5±3.32 mm in total length.