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한국 동해안 대구, Gadus macrocephalus TILESIUS의 성숙과 산란
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  • 한국 동해안 대구, Gadus macrocephalus TILESIUS의 성숙과 산란
저자명
차형기,이성일,윤상철,김영섭,전영열,장대수,양재형,Can. Hyung-Kee,Lee. Sung-Il,Yoon. Sang-Chul,Kim. Young-Seop,Chun. Young-Yull,Chang. Dae-Soo,Yang. Ja
간행물명
한국어업기술학회지
권/호정보
2007년|43권 4호|pp.320-328 (9 pages)
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한국어업기술학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Maturation and spawning of the Pacific cod, Gadus macrocephalus was investigated based on the samples captured in East Sea of Korea from April 2006 to July 2007. Gonadosomatic index began to increase in November, and reached maximum between December and January. After spawning it began to decrease from March. Reproductive season was estimated to November-February, with peak in January. Fecundity was proportional to the size of the female, with the clutch size varying from 753,985 eggs in the smallest female(TL=58.6cm) to 9,311,520 eggs in the largest(TL=101.0cm). Size at 50% sexual maturity(TL50%) determined from mature females was 56.3cm of TL. Annual reproductive cycles of this species could be divided into six successive stages; immature stage(March-September), nucleolus stage(September-October), yolk vesicle stage(October-November), vitellogenic stage (November-December), ripe stage and spent stage(December-February).