웅어, Coilia nasus의 생식주기에 관한 조직학적 연구

• 영문명: Histological Study on the Reproductive Cycle of Coilia nasus
• 발행기관: 군산대학교 수산과학연구소
• 저자명: 이봉우(Bong-Woo Lee) 정의영(Ee-Yung Chung) 이정열(Jeong-Yeol Lee)
• 간행물 정보: 『군산대학교 수산과학연구소 연구논문집』제5집, 365~372쪽, 전체 8쪽
• 주제분류: 농수해양 > 수산학
• 파일형태: PDF
• 발행일자: 2004.07.03

영문 초록

Reproductive cycle, gonadal development and the spawning. period of the Korean anchovy Coilia nasus were investigated by histologhical observations. Samples were collected at the coastal area of Geumgang dyke which is connected to Gunsan and Janghang, Korea, from February 2002 to January 2003. C. nasus is dioecious; the ovary consists of a pair of saccular structure with many ovarian lobules, and the testis consists of a pair of lobular structure with many testicular lobules and connected to the posterior seminal vesicle. Monthly changes in the gonadosomatic index (GSI) began to increase in April when seawater temperature increased and reached the maximum in June when the ovary was getting mature, the summer season of longer day length with higher water temperature. The reproductive cycle can be classified into five successive stage in females: early growing stage (February to March), late growing stage (March to April), mature stage (May to June), ripe and spent stage (June to July), and recovery and resting stage (July to January): in males, the cycle can be divided into four successive stages; growing stage (February to April), mature stage (May to July), ripe and spent (June to July), and recovery and resting stages (July to January). According to the frequency distributions of egg diameters in the spawning season C. nasus is presumed to be summer spawning species and polycyclic species to spawn 2 times or more during the spawning season.

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