Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effect of the Anesthesia MS-222, Ethyl 3-Amino-Benzoate-Methane Sulfonate on Survival and Hatching of Marine Benthic Copepod Tigriopus japonicus

마취제 MS-222, ethyl 3-amino-benzoate-methane sulfonate 가 해양 부착성 요각류 Tigriopus japonicus의 생존과 부화에 미치는 영향

  • Shin, Hyo-Jin (Department of Aquaculture, Pukyung National University) ;
  • Hur, Sung-Bum (Department of Aquaculture, Pukyung National University)
  • Published : 2006.11.25
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Abstract

This study was carried out to examine the anesthesia and recovery time of the male and gravid female of marine benthic copepod Tigriopus japonicus at 500, 750, 1,000 ppm of MS-222. We also investigated the survival (%) and the nauplii production of T. japonicus for 14 days, which was anesthetized with MS-222. As the concentration of MS-222 was higher, the anesthesia time of the copepod was shorter and the recovery time was longer. The survival (%) of male T. japonicus was significantly higher than that of the gravid female both in anesthetized and control group. But the survival (%) of the male treated with MS-222 did not show the different survival (%) with the control (0 ppm). In contrast, the survival (%) of the gravid female treated with 750 and 1,000 ppm was significantly lower than that of 500 ppm and control. With regard to hatching, as the concentrations was higher, the number of hatching and total nauplii were lower and interval of hatching was longer. However, the gravid female treated with 500 ppm did not show the significant difference with control. We suggest that 500 ppm of MS-222 is the suitable concentration in isolation of T. japonicus.

살아 움직이는 요각류를 모세관으로 분리 할 때 마취제(MS-222)의 이용은 편리할 뿐만 아니라 분리 후 요각류의 생존율을 높일 수 있다. 본 실험은 다양한 종류와 크기의 요각류를 효율적으로 분리하기 위하여 부착성 요각류인 Tigriopus japonicus 수컷과 포란한 암컷을 대상으로 MS-222의 농도별(500, 750, 1,000 ppm) 마취시간과 회복시간 그리고 마취 후 분리된 개체들의 생존율 및 포란한 암컷의 nauplius 생산력을 비교 조사하였다. 그 결과는 다음과 같다. MS-222의 농도가 높아질수록 마취시간은 짧고 회복시간은 길게 나타났다. MS-222로 마취 후 분리한 T. japonicus의 14일간의 생존율에서 수컷은 포란한 암컷 실험구에 비해 유의적으로 높게 나타났으나 수컷 대조구와 유의적 차를 보이지 않았다. 반대로 포란한 암컷의 경우는, 750 ppm, 1,000 ppm에서는 생존율이 대조구나 500 ppm 에서보다 유의적으로 낮았다. MS-222 농도가 높을수록 T. japonicus의 부화횟수와 부화량은 적고, 부화주기는 길었다. 그러나 500 ppm 실험구는 대조구와 유의적인 차이가 없어 T. japonicus의 분리 시 적정 농도는 500 ppm 정도로 판단된다. 이러한 결과는 차후 다양한 크기의 요각류를 분리할 때 MS-222의 적정 농도를 파악하는데 유익한 기초 자료가 될 것이다.

Keywords

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