Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Effects of Salinity on Survival, Growth and Oxygen Consumption Rates in the Mysid, Neomysis awatschensis

곤쟁이, Neomysis awatschensis의 생존, 성장 및 산소 소비율에 미치는 염분의 영향

  • 지정훈 (부경대학교 수산생명의학과) ;
  • 황운기 (국립수사과학원 동해연구소) ;
  • 강주찬 (부경대학교 수산생명의학과)
  • Published : 2003.03.01
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Abstract

Effects of salinity on survival, growth and oxygen consumption rates were examined in the mysid, Neomysis awatschensis. Mysids were exposed to various concentrations of salinity (0, 3.4, 6.7, 10.1, 13.4, 20.2, 27.4 and 33.6$\textperthousand$) for 40 days. Survival rate was significantly declined at below 6.7$\textperthousand$ after 40 days. Body length and daily growth rate of mysids exposed at below 6.7$\textperthousand$ salinity were significantly decreased than those of mysids exposed at above 10.1$\textperthousand$ salinity. Oxygen consumpiton rate of mysid exposed at salinity raining of 10.1~39.6$\textperthousand$ during 40 days not greatly changed in comparison with that before salinity treatment, but that of mysid exposed at below 6.7$\textperthousand$ significantly decreased. These results indicated that low salinity concentration ($\leq$6.7$\textperthousand$) reduced survival, growth and oxygen consumption rates of the mysid suggesting potential influence on the natural mortality of Neomysis awatschensis in the estuarine and coastal areas.

곤쟁이, Neomysis awatschensis의 염분 내성을 파악하기 위하여 40일동안 다양한 염분에 노출시켜 생존, 성장 및 산소소비율에 미치는 염분의 영향을 조사하였다. 생존율은 6.7$\textperthousand$ 이하의 염분에서 40일 이후 현저하게 감소하였다. 곤쟁이의 체장과 일간 성장률도 40일 이후, 6.7$\textperthousand$이하의 염분에서 10.1% 이상의 염분 농도구와 비교해 현저히 감소하였다. 산소소비율은 40일 동안 10.1~33.6$\textperthousand$에 노출된 곤쟁이의 경우에는 염분처리 전과 비교해 큰 변화를 나타내지 않았지만, 6.7$\textperthousand$ 이하에 노출된 곤쟁이의 산소소비율은 현저하게 감소하였다. 이상의 결과는 6.7$\textperthousand$ 이하의 낮은 염분 농도에서는 곤쟁이의 생존, 성장 및 산소소비율이 감소한다는 것을 나타내고 있으며, 하구나 연안지역에서 염분이 6.7$\textperthousand$ 이하로 낮아질 경우에 서식하는 곤쟁이의 자연 사망률에 잠재적으로 영향을 미칠 수 있다는 것을 암시한다.

Keywords

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