Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Spawning or Respawning Conditions of Acheilognathus signifer (Pisces: Acheilognathinae)

묵납자루, Acheilognathus signifer (Pisces: Acheilognathinae)의 산란 및 재산란 조건

  • 김형수 ((주)생물다양성연구소) ;
  • 양현 ((주)생물다양성연구소)
  • Received : 2013.04.22
  • Accepted : 2013.06.26
  • Published : 2013.06.30
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Abstract

Factors influencing spawning or respawning conditions of the bitterling, Acheilognathus signifer were investigated in the aquariums. Inducing the female spawning was more sensitive to the mussel than the male. The ovipositor of the female was periodically elongated and reduced from 4 to 6 days with the presence of mussel. During of the elongated state of the ovipositor was 1 to 2 days. As the result of natural spawning in the aquariums, it takes 1 to 3 days (mean 1.6) to spawn. The most important factor to respawn spawned females again was the mussel. It takes 11 to 53 days (mean 29.5) from extraction to reextraction of females which have elongated ovipositor. The egg numbers of reextraction were 2 to 41 (mean 19). This experiments showed the tendency the more standard length of females grows, the more the number of extracted eggs increases.

묵납자루의 산란 및 재산란에 영향을 미치는 요인을 알아보고자 실내실험을 실시하였다. 암컷의 산란 유발은 수컷보다 조개에 더욱 민감하게 반응하였고 조개와 함께 합사한 암컷의 산란관은 4~6일을 주기로 신장과 축소를 반복하였으며 산란관의 신장기간은 1~2일 정도 지속되었다. 산란이 임박한 암컷과 수컷의 자연산란을 유도한 결과 산란이 이루어지는 데 소요된 기간은 1~3 (평균 1.6)일이었다. 산란을 마친 암컷이 재산란하는 데 가장 중요한 요인은 조개로 나타났고 암컷을 채란한 후 재채란하는 데까지는 11~53 (평균 29.5)일이 소요되었다. 재채란수는 2~41 (평균 19)개로 나타났으며 암컷의 체장이 커질수록 채란되는 알의 수는 증가하는 경향을 보였다.

Keywords

References

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