Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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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
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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.

한국산 가재 Cambaroides similis 자연 개체군의 생활사를 밝히기 위해 2006년 3월부터 10월까지 약 8개월간 서울소재 관악산에 서식하는 가재를 조사하였다. 조사기간 중 포획 및 재포획 방법을 사용하여 총 551개체에 대한 조사가 이루어 졌다. 연구결과 관악산의 가재 개체군은 체장 빈도 분포를 통해 4개의 연령 구조를 가지는 것으로 추정되며, 암수 성비는 거의 동일하였다. 성장률은 수은에 크게 영향을 받음을 알 수 있었다. 6월에 확인된 어린 유생들은 8월에 성체로 성장하였다. 논란이 있었던 한국산 가재의 교미시기는 늦은 가을부터 시작됨을 확인하였다.

Keywords

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