한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)

  • 제22권5호
  • /
  • Pages.351-362
  • /
  • 1989
  • /
  • 0374-8111(pISSN)
  • /
  • 2287-8815(eISSN)
한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)
권호 표지

낙동강 하구에 서식하는 자주새우(Crangon affinis)의 생태학적 연구

Ecology of Sand Shrimp, Crangon affinis in the Nakdong River Estuary, Korea

  • 홍성윤 (부산수산대학 자원생물학과) ;
  • 오철웅 (부산수산대학 자원생물학과)
  • HONG Sung Yun (Department of Marine Biology, National Fisheries University of Pusan) ;
  • OH Chul Woong (Department of Marine Biology, National Fisheries University of Pusan)
  • 발행 : 1989.11.01
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초록

Ecology of Crangon affinis was studied in the Nakdong River Estuary fron June 1988 to May 1989. The growth rate of female was similar to that of male. Size differences, however, were apparent between female and male. Sex ratio varies with season. The major spawning season was from June 1988 to May 1989 except for November 1988. The number of eggs of the largest ovigerous female (35.55mm TL) was over 4,000, while that of the smallest ovigerous female (15.05mm TL) more than 120. The mean number of eggs was 1778. The size of winter eggs is larger than that of the summer eggs. The mean percentage of egg loss from brooding to hatching was $29.06\%$. The rate of egg loss decreases with increasing age. Major component of food organisms includes mysids and polycheates.

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