한국 연근해 황아귀 , Lophius litulon (Jordan) 의 성숙과 산란 = Maturation and Spawning of the Yellow Goosefish , Lophius litulon (Jordan) in Korean Waters

다국어 초록 (Multilingual Abstract)

Maturation and spawing of the yellow goosefish, Lophius litulon was investigated based on the samples captured in Korean waters from January 1994 to June 1997. Gonadosomatic index began to increase in January, and reached maximum between February and April. After spawing it began to decrease from May. Fecundity was directly proportional to the size of the female, with the clutch size varying from 369,570 eggs in the smallest female(TL=52.25cm)to 1,874,560 eggs in the largest (TL=90.25cm), and the matured eggs ranged from 600 ㎛ to 800㎛ in diameter. Total length and age at maturity were substantially different between sexes, which were 48.5cm and 3.5 years for females and 34.7cm and 2.3 years for males. Annual reproductive cycles of this species could be divided into six successive stages : immature stage, nucleolus stage, yolk vesicle stage, vitellgenic stage, ripe stage and spent stage. Sex ratio (♀:♂) was 62:38 on average but during spawing season females appeared to be more abundant than the average value, accounting for 66~81% of the total.