Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effects of Diluents and Cryoprotectants on Cryopreservation of Black Seabream (Acanthopagrus schligeli) Sperm

감성돔(Acanthopagrus schlegeli) 정자의 냉동보존에 미치는 희석액과 동해방지제의 영향

  • 임한규 (부경대학교 수산과학대학 양식학과) ;
  • 장영진 (부경대학교 수산과학대학 양식학과)
  • Published : 1998.02.01
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Abstract

Experiments were performed to obtain cryopreservation techniques of black seabream (Acanthopagrus schlegeli) sperm. For sperm collection, brood stock reared in recirculating seawater system and fed with the commercial feed during experimental period. The results indicated that following cryopreservation method in block seabream sperm could be employed. Post-thaw survival rate of sperm revealed the highest value ($80{\pm}1.4$%) in 3% sodium citrate as a diluent for the cryopreservation. Cryopreserved sperm diluted with 5.4% glucose showed the highest fertilization rate to the ovulated eggs. Glycerol was a better cryoprotectant than dimethyl sulfoxide in sperm cryopreservation : survival rate and fertilizing capacity of cryopreserved sperm were decreased according to increase of glycerol concentration and varied in renges of 0.8~59.3% and 32.5~69.4% with 5~30% glycerol, respectively. A few of cryopreserved spermatozoa showed the enlarged head with granulated chromatin and ruptured plasma membrane by freezing and thawing injuries compared with unfrozen normal spermatozoa.

감성돔 (Acanthopagrus schlegeli) 정자의 냉동 보존시 정자의 생리활성과 보존효과를 비교하기 위하여, 순환여과 사육시스템에서 사육한 전장 $25.9{\pm}1.7$ cm, 체중$292.8{\pm}53.7$ g의 성어로부터 얻은 정액을 재료로 하여 희석액별, 동해방지제별 해동후 정자의 활성, 생존율 및 알에 대한 수정능력을 평가하였다. 희석액별 냉동보존에서 해동정자의 생존율은 3% sodium citrate에서 $80{\pm}1.4$%로 가장 높았으나, 수정률은 5.4% glucose에서 $63.4{\pm}4.4$%로 가장 높았다. 동해방지제별 냉동보존에서 해동정자의 수정률은 5~15% glycerol을 동해방지제로 사용하였을 때, 50.1~69.4%로 DMSO 보다 나은 효과를 보였다. 감성돔 정자의 냉동보존을 위한 적정 희석액과 동해방지제는 5% glucose와 5% glycerol이었다. 냉동하지 않은 감성돔 정자의 머리는 구형으로 직경 $1.5{\pm}0.1$ ${\mu}$m, 길이 $1.3{\pm}0.1$${\mu}$m였으며, 치밀한 핵질로 채워져 있었다. 편모는 전형적인 9+2 구조를 나타냈다. 그러나 냉동후 해동시킨 정자중에서는 염색질의 과립화, 세포막의 이탈에 의한 그 용적이 커지는 구조변화를 보였다.

Keywords

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