Temperature and Salinity Tolerance and Haemolymph Osmotic and ionic Concentration of the Snow Crab, Chionoecetes opilio

대게, Chionoecetes opilio의 수온 및 염분변화에 따른 생존내성과 Haemolymph의 삼투질과 이온 농도변화

  • 임영수 (국립수산진흥원 울진수산종묘시험장) ;
  • 이종관 (국립수산진흥원 울진수산종묘시험장) ;
  • 이복규 (동의대학교 생물학과) ;
  • 장영진 (부경대학교 양식학과) ;
  • 허준옥 (부경대학교 양식학과) ;
  • 문승현 (부경대학교 양식학과) ;
  • 허성범 (부경대학교 양식학과)
  • Published : 2001.09.01

Abstract

Tolerance limits of the adult crab were determined by exposing them to different temperatures (5~2$0^{\circ}C$) and salinities(12~32$\textperthousand$). The tolerance limit for high temperature was determined at 14$^{\circ}C$ and 16$^{\circ}C$ for male and female snow crab, respectively and that for salinity was 21 $\textperthousand$ at 5 $^{\circ}C$. Osmolality concentration, Na$^{+}$ and $K^{+}$ ions in the haemolymph of especially, the females was positively related to the salinity changes. Increased water temperature resulted in a marked decreased in ionic and osmolality concentrations near the limit of tolerance in male, however, such a clear pattern was not apparent for the females. The concentration of glucose in the haemolymph was positively related to water temperature but negatively to salinity.ity.

수온(5~2$0^{\circ}C$)과 염분(12~32$\textperthousand$)의 변화에 따른 대게 암수의 생존내성과, 삼투질, 이온 및 글루코스 농도 변화 등에 대한 생리적 반응을 연구하였다. 14, 16, 18$^{\circ}C$에서 50% 폐사시간은 암컷의 경우 각각 24.3일(수컷 11.3일), 10.7일(수컷 3.3일), 1.8일(수컷 0.6일)로 나타나, 수온의 증가에 따라 50% 폐사시간이 빨라지는 경향을 나타냈으며, 암수 각각 16$^{\circ}C$와 14$^{\circ}C$를 기점으로 폐사시간이 급격히 빨라졌다. 염분의 변화에 대해 암수 모두 24$\textperthousand$이상에서는 실험기간동안 50% 이하의 폐사율을 나타냈으며, 21$\textperthousand$에서 50% 폐사시간이 암컷 20.3시간(수컷 17시간), 12$\textperthousand$에서는 암컷 2.2시간(수컷 3시간)으로 나타났다 수온에 따른 삼투질 및 이온 농도의 변화에서, 수컷은 14$^{\circ}C$에서 급격한 감소경향 을 나타냈으나, 암컷은 뚜렷한 변화경향이 없었다. 염분의 변화에 대해, 암컷은 삼투질 및 이온 농도가 순응하는 경향을 나타냈으나, 수컷은 다소 불안정한 경향을 나타냈다. 또, 수온의 증가와 염분의 저하에 따라, 암수 모두 글루코스 농도가 증가하는 경향을 나타냈다.

Keywords

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