Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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A Study on the Testicular Cycle of Korean Brown Frog (Rana coreana)

한국산개구리(Rana coreana) 정소주기에 관한 연구

  • 신정민 (호남대학교 대학원 생물학과) ;
  • 고선근 (호남대학교 생물학과)
  • Received : 2014.05.09
  • Accepted : 2014.06.13
  • Published : 2014.06.30
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Abstract

In order to determine the testicular cycle of the Korean brown frog, Rana coreana, the gonadosomatic index (GSI) and the changes of germ cells in testis for adult males were investigated throughout the year. The study indicated that the spermatogenesis in the seminiferous tubule of testis began in August and became most active in the month of September, and the GSI was recorded the highest and the cross area of seminiferous tubule was the widest on this period. Furthermore the seminiferous tubules at the post spawning stage appeared in testis during February, and the spermatogenesis was quiescence period of time from March to July and the GSI and the cross area of seminiferous tubule were found to be the lowest. Based on these observations, we suggest that, GSI of male Korean brown frog changes significantly between July to August, indicating the testicular cycle with discontinuous spermatogenic process, and the breeding season was confirmed to be February.

한국산개구리 (Rana coreana)의 정소주기를 파악하기 위해 수컷 성체를 대상으로 gonadosomatic index (GSI)와 정소 내 생식세포의 변화를 연중 조사하였다. 정소의 세정관내 정자형성은 8월부터 시작되어져 9월의 정소에서 가장 활발하게 진행되었으며 이 시기에 GSI의 값이 가장 컸고 세정관의 단면적도 가장 넓게 나타났다. 2월의 정소에서는 정자배출 후 단계의 세정관들이 출현하였으며 이후 3월~7월까지 일정기간동안 정자형성이 정지되었고 GSI와 세정관의 단면적도 최저치를 나타내었다. 본 결과들로 보아 한국산개구리 수컷의 GSI는 7월에서 8월 사이에 유의하게 변화했고 정자형성과정이 불연속적으로 진행되는 정소주기를 나타내며 번식기는 2월로 확인되었다.

Keywords

References

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