Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Sperm Cryopreservation of Pacific Cod Gadus macrocephalus

대구(Gadus macrocephalus)의 정자 동결보존

  • 도용현 (국립수산과학원 남동해수산연구소) ;
  • 조재권 (국립수산과학원 남동해수산연구소) ;
  • 이희정 (국립수산과학원 남동해수산연구소) ;
  • 민병화 (국립수산과학원 양식관리과)
  • Received : 2019.09.23
  • Accepted : 2019.11.20
  • Published : 2019.12.31
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Abstract

An experiment was performed to obtain cryopreservation techniques of Pacific cod Gadus macrocephalus sperm. Milt were cryopreservation using five cryoprotectant demethyl sulfoxide (DMSO), ethylene glycol (EG), glycerol, methanol and propylene glycol (PG) with marine fish ringer's solution (MFRS) as diluent. Milt were cryopreserved each experimental methods like cryoprotectants (10% and 20%), equilibration time (3, 5 and 10 min) and freezing protocols (liquid nitrogen vapor above 3, 8 and 12 cm). Post-thaw sperm survival rate revealed the highest in 10% PG with optimum methods of equilibration time (3 min) and freezing protocol (liquid nitrogen vapor above 8 cm) about 21.3±1.8%. Hatching rate of fertilization eggs using fresh and cryopreserved sperm were no significantly different.

본 연구는 대구(Gadus macrocephalus) 정자의 동결보존 기술을 개발하기 위해 적정 동해방지제 및 동결보존 방법을 탐색하고, 동결보존된 정자를 해동하여 효과를 조사하고자 한다. 동결보존에 사용된 동해방지제는 demethyl sulfoxide (DMSO), ethylene glycol (EG), glycerol, methanol 및 propylene glycol (PG)였으며, marine fish ringer's solution (MFRS)를 희석액으로 사용하였다. 적정 동결보존 방법을 탐색하기 위하여 동해방지제 농도별(10%, 20%), 평형시간(3분, 5분, 10분), 1차 동결(액체 질소 표면 위 3, 8, 12 cm)별로 총 90개 실험구를 설정하였다. 해동 후 가장 높은 정자 생존율을 보인 실험구는 PG 10%, 평형시간 3분, 1차동결 8 cm 방법으로 21.3±1.8%의 생존율을 보였다. 신선한 정자와 해동한 정자를 사용하여 인공수정시킨 수정란의 부화율에서 유의한 차이는 없었다.

Keywords

References

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