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한국 (韓國) 특산종 , 감돌고기의 초기발생에 관한 연구
김재구,홍영표,안광국,최신석 ( Jai Ku Kim,Young Pyo Hong,Kwang Guk An,Shin Suk Choi ) 한국하천호수학회 1991 생태와 환경 Vol.24 No.2
Studies on early embryonic development of Pseudopuntungia nigra were carried out. The mature eggs were spherical in shape, adhesive, 2.2∼2.3 mm in diameter and transparently pinkish in color, whereas the immature eggs were irregular in shape, non-adhesive, and embryonic development did not process even if formation of perivitelline spaces appeared in artificial fertilization. Just after fertilization, yolk sac became shrunk and yolk membranes expanded. Therefore, the size of eggs attained approximately to 2.5 mm. Blastodiscs formed in 1 hours and 20 minutes after fertilization, which divided into 2 cells in 2 hours and 5 minutes after fertilization. Between 11 hours and 30 minutes and 18 hours and 30 minutes after fertilization, blastula and gastrula stages occurred in yolk membranes. Embryonic development began from 22 hours and 55 minutes after fertilization. Blood circulation through the pericardiales cavum occurred in 119 hours after fertilization. About 175 hours and 30 minutes after fertilization, thetransparent two-otoliths in auditory vesicles appeared in 175 hours and 30 minutes after fertilization. Egg-hatching occured in yolk membranes mostly between 7 and 9 days after fertilization. Just hatched larvae were measured 6.8 mm on average in total length, which possess over 32 myomeres in notochord. Two days after hatching, air-bladder formed, and appeared melanophores appeared at first in their caudal fin. Seven days after hatching, larvae showed mouth-opening and liver formation. Eighteen days after hatching, pigment pattern of larvae were the same as those of adults except for the anal fin.