Growth Rate, Sex Ratio, Age Structure and Mating Period of Korean Crayfish Cambaroides similis Natural population

한국산 가재 Cambaroides similis 자연 개체군의 성장률, 암수비율, 연령구조 및 교미시기

  • Jung, Jae-Ho (Department of Biological Sciences, Inha University) ;
  • Kim, Min-Seop (Department of Biological Sciences, Inha University) ;
  • Ahn, Dong-Ha (Department of Biological Sciences, Inha University) ;
  • Min, Gi-Sik (Department of Biological Sciences, Inha University)
  • Published : 2009.02.25

Abstract

Life history of Korean crayfishes Cambaroides similis (Koelbel) was studied 8 month from March to October, 2006 from the Gwanak mountain, Seoul, South Korea. By capture and recapture method, 551 crayfishes were collected analyzed during the experimental period. Based on the distribution pattern of body lengths, the local population putatively divided into four age groups. The sex ratio of male and female was almost equal. However, their growth rates varied by water temperature. Early juveniles seen during June became adult during August. The study findings suggest that late autumn is mating season.

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