Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Spawning Ecology of Sarcocheilichthys variegatus wakiyae (Cyprinidae) in Jicheon Stream, Korea

지천에 서식하는 참중고기 Sarcocheilichthys variegatus wakiyae (Cyprinidae)의 산란생태

  • Received : 2018.11.11
  • Accepted : 2018.12.08
  • Published : 2018.12.31
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Abstract

The study on the spawning ecology of Sarcocheilichthys variegatus wakiyae at Jicheon stream, Korea was investigated from March 2016 to February, 2017. The sex ratio of male to female was 1 : 0.97 and there was no significant difference. The spawning season was from the end of April to the mid-July, and the peak of spawning period was from the beginning of May to the end of June. The average water temperature at this time was $18^{\circ}C$. According to frequency analysis of total length, it is presumed that the group with a total length of less than 51~70 mm was one year old, the 71~100 mm was two years old, and the group over 101 mm was three years old. They sexually matured when they were over two years. The average number of eggs in the ovaries was estimated as $428{\pm}194per$ matured female. The mature eggs were yellowish, oval, and had a mean diameter of $2.38{\pm}0.25mm$ and a short diameter of $1.98{\pm}0.20mm$.

참중고기 (Sarcocheilichthys variegatus wakiyae)의 개체군 생태 연구를 위하여 지천에서 2016년 3월부터 2017년 2월까지 매월 10~15일에 조사를 실시하였다. 암수의 성비 (male : female)는 1 : 0.97로 큰 차이는 보이지 않았다. 산란시기는 4월 말에서 7월 중순까지로 추정되었고, 산란 성기는 5월 초에서 6월 말까지로 이 시기에 평균 수온은 $18^{\circ}C$이었다. 전장이 51~70 mm의 집단은 만 1년생, 71~100 mm의 집단은 만 2년생, 101 mm 이상은 만 3년생으로 추정되었고, 만 2년생 이상부터 성적 성숙이 이루어지기 시작했다. 포란수는 176~836개로 평균 $428{\pm}194per$개이었다. 성숙란은 노란색이었고 크기는 평균 장경이 $2.38{\pm}0.25mm$, 단경이 $1.98{\pm}0.20mm$이었다.

Keywords

References

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