Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
권호 표지

Study on the Reproductive Biology of the Giant Freshwater Prawn, Macrobrachium rosenbergii(De Man) IV. Oviposition, Fertilization and Brooding

대형 담수산새우, Macrobrachium rosenbergii (De Man)의 생식 생현에 관한 연구 IV. 산란, 수정 및 포란 과정

  • 권진수 (동의대학교 자연과학대학 생물학과) ;
  • 이복규 (동의대학교 자연과학대학 생물학과) ;
  • 김병기 (동의대학교 자연과학대학 생물학과)
  • Published : 1999.10.01
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Abstract

Timing of oviposition, nuclear maturation of oocytes, egg-sperm contact and brooding were observed in the giant fresh-water prawn Macrobrachium rosenbergii reared in the laboratory. When a pre-spawning molted female was transferred to the male, the female oviposited commonly at 5 to 10 hr after mating. The first polar body were extruded within 2-3 min after spawning. The egg chromosome progressed to release second polar body by 30 min and mitotic nuclear division occurred in 8 hr after spawning. Thumbtack-shaped spermatozoa were seen peneterating egg membrane with their spike directed forward. Transformation of spermatozoa and fertilization membrane could not be observed by light microscopy. The elapsed hours from oviposition to the end of brooding wee taken in 5-7 hr. Brood size for female 9 cm and 18 cm in body length was estimated to be 10,000~15,000 and 100,000 eggs, respectively and is proportional to the total length of the berried females. The ovigerous females reared at chlorinity of 2.21~4.25$\textperthousand$Cl. showed a normal egg development up to hatching.

Keywords

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