Korean Journal of Ichthyology (한국어류학회지)
- Volume 10 Issue 2
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- Pages.191-199
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- 1998
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- 1225-8598(pISSN)
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- 2288-3371(eISSN)
Sexual Maturation of the Spotted Flounder Verasper variegatus
범가자미 Verasper variegatus의 성성숙
- Kim, Yoon (Aquaculture Division, National Fisheries Research and Development Institute (NFRDI)) ;
- An, Cheul-Min (Aquaculture Division, National Fisheries Research and Development Institute (NFRDI)) ;
- Kim, Kyung-Kil (Aquaculture Division, National Fisheries Research and Development Institute (NFRDI)) ;
- Baek, Hea-Ja (Aquaculture Division, National Fisheries Research and Development Institute (NFRDI))
- Published : 1998.12.30
Abstract
The ovary of the spotted flounder Verasper variegatus is a conical bag in shape and is bilateral structure develops lengthily from the posterior of the abdomen to the end of the anal fin. The testis also is bilateral in structure, usually located in small size in the abdomen. In females, the gonadosomatic index (GSI) showed very low from March to July, and then began to increase from August, thereafter reached the maximum in January through out the year. In males, the GSI reached the maximum (1.7) in January through out the year, as seen in females. Compared with the male GSI in other fishes, the maximum GSI of this species were very lower than those of other fishes. According to the distributions of egg diameter in the spawning season, it is assumed that the spotted flounder spawn four times or more in the spawning season. The total length of female and male reached 50% first sexual maturity were 42.0~44.0 and 28.0~30.0cm, respectively and total length of female and male reached 100% maturity were 44.0 and 32.0cm, respectively. The reproductive cycle could be classified into four successive developmental stages: growing stage (August~October), mature stage (November~December), ripe and spent stage (December~February), degenerative and resting stage (March~July).
범가자미 Verasper variegatus의 난소는 좌우 1쌍의 대칭구조로 주머니 모양이며 산란기가 되면 생식소는 복강 뒤부터 뒷지느러미까지 길게 발달하였다. 정소는 좌우 1쌍을 가지나 산란기에 복강 내에서만 발달하였다. 생식소중량지수(GSI)는 암컷의 경우 3월부터 7월까지는 낮은 값을 보이다가 8월부터 증가하기 시작하여 1월에 연중 최대값을 나타내었다. 수컷의 GSI 변화도 암컷과 마찬가지로 1월에 연중 최대값(1.7)을 나타내었다. 산란기의 난소에는
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