Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Effect of Water Temperature and Body Weight on Oxygen Consumption Rate of Starry Flounder Platichthys stellatus

강도다리 Platichthys stellatus의 산소 소비율에 미치는 수온과 체중의 영향

  • Oh, Sung-Yong (Marine Living Resources Research Department, Korea Ocean Research & Development Institute) ;
  • Jang, Yo-Soon (Marine Living Resources Research Department, Korea Ocean Research & Development Institute) ;
  • Noh, Choong Hwan (East Sea Environment Research Department, Korea Ocean Research & Development Institute) ;
  • Choi, Hee Jung (Marine Living Resources Research Department, Korea Ocean Research & Development Institute) ;
  • Myoung, Jung-Goo (Marine Living Resources Research Department, Korea Ocean Research & Development Institute) ;
  • Kim, Chong-Kwan (Marine Living Resources Research Department, Korea Ocean Research & Development Institute)
  • 오승용 (한국해양연구원 해양생물자원연구부) ;
  • 장요순 (한국해양연구원 해양생물자원연구부) ;
  • 노충환 (한국해양연구원 동해특성연구부) ;
  • 최희정 (한국해양연구원 해양생물자원연구부) ;
  • 명정구 (한국해양연구원 해양생물자원연구부) ;
  • 김종관 (한국해양연구원 해양생물자원연구부)
  • Received : 2008.09.26
  • Accepted : 2009.03.02
  • Published : 2009.03.31
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Abstract

The effect of water temperature (T) and body weight (W) on oxygen consumption of fasted starry flounder Platichthys stellatus was investigated in order to assess the metabolic response of this species at given conditions. The oxygen consumption rate (OCR) was measured under six different water temperatures (4, 7, 10, 13, 16 and $19^{\circ}C$) and at two different body weights (mean weight of fry group : 1.5 g; fingerling group : 37.4 g) at an interval of 5 minutes for 24 hours using a continuous flow-through respirometer. In each treatment three replicates were set up and a total 540 fish in fry groups and 90 fish in fingerling groups were used. The OCRs increased with increase of water temperature in both groups (p<0.001). Mean OCRs at 4, 7, 10, 13, 16 and $19^{\circ}C$ were 1386.0, 1601.7, 1741.0, 1799.2, 2239.1 and $2520.3mg\;O_2\;kg\;fish^{-1}\;h^{-1}$ in fry groups, and 83.8, 111.4, 126.3, 147.1, 187.7 and $221.3mg\;O_2\;kg\;fish^{-1}\;h^{-1}$ in fingerling groups, respectively. The OCRs decreased with increasing body weights at six different water temperatures (p<0.001). The relationship between water temperature and body weight is described by the following equation : OCR=1520.91+40.85T-49.22W ($r^2=0.95$, p<0.001). The energy loss by metabolic response increased with an increase in water temperature and a decrease in body weight (p<0.001). Mean energy loss rates by oxygen consumption at 4, 7, 10, 13, 16 and $19^{\circ}C$ were 907.9, 1046.5, 1141.6, 1177.0, 1467.3 and $1650.1kJ\;kg\;fish^{-1}\;d^{-1}$ in fry groups and 54.8, 73.0, 82.9, 96.2, 122.9 and $144.6kJ\;kg\;fish^{-1}\;d^{-1}$ in fingerling groups, respectively. The $Q_{10}$ values of fingerling groups were higher than those of fry groups at given temperature ranges. The $Q_{10}$ values at $4{\sim}7^{\circ}C$, $7{\sim}10^{\circ}C$, $10{\sim}13^{\circ}C$, $13{\sim}16^{\circ}C$ and $16{\sim}19^{\circ}C$ were 1.62, 1.32, 1.12, 2.07 and 1.48 in fry groups, and 2.59, 1.52, 1.67, 2.25 and 1.73 in fingerling groups, respectively.

강도다리의 수온과 체중에 따른 대사 반응을 조사하기 위해 절식한 자어(습중량, $1.5{\pm}0.4g$, 540마리)와 대형어 ($37.4{\pm}2.3g$, 90마리)를 대상으로 여섯 가지 수온(4, 7, 10, 13, 16 그리고 $19^{\circ}C$)에 따라 유수식 형태의 호흡실을 이용하여 24시간 동안 5분 간격(3반복)으로 산소 소비율(oxygen consumption rate, OCR)을 측정하였다. 수온과 체중 그리고 두 인자의 상호작용 모두가 강도다리의 산소 소비율에 유의한 영향을 미쳤다(p<0.001). 수온 상승에 따라 강도다리 자어와 치어의 산소 소비율은 모두 유의적으로 증가하였다(p<0.001). 수온 4, 7, 10, 13, 16 그리고 $19^{\circ}C$에서의 시간당 평균 산소 소비율은 자어의 경우 각각 1386.0, 1601.7, 1741.0, 1799.2, 2239.1 그리고 $2520.3mg\;O_2\;kg\;fish^{-1}\;h^{-1}$이었고, 치어의 경우 각각 83.8, 111.4, 126.3, 147.1, 187.7 그리고 $221.3mg\;O_2\;kg\;fish^{-1}\;h^{-1}$이었다. 실험 수온 조건에서 체중 증가에 따라 산소 소비율은 유의하게 감소하였다(p<0.001). 강도다리의 산소 소비율에 미치는 수온(T)과 체중(W)의 상관관계는 OCR=1520.91+40.85T-49.22W ($r^2=0.95$, p<0.001)이었다. 대사 작용에 의한 에너지 손실은 수온 증가와 체중 감소에 따라 증가하였다(p<0.001). 수온 4, 7, 10, 13, 16 그리고 $19^{\circ}C$에서 일간 평균 에너지 손실은 자어의 경우 각각 907.9, 1046.5, 1141.6, 1177.0, 1467.3 그리고 $1650.1kJ\;kg\;fish^{-1}\;d^{-1}$이었고, 치어의 경우 각각 54.8, 73.0, 82.9, 96.2, 122.9 그리고 $144.6kJ\;kg\;fish^{-1}\;d^{-1}$이었다. $Q_{10}$ 값은 $4{\sim}7^{\circ}C$, $7{\sim}10^{\circ}C$, $10{\sim}13^{\circ}C$, $13{\sim}16^{\circ}C$ 그리고 $16{\sim}19^{\circ}C$ 구간에서 자어의 경우 각각 1.62, 1.32, 1.12, 2.07 그리고 1.48이었고, 치어의 경우 2.59, 1.52, 1.67, 2.25 그리고 1.73이었다.

Keywords

Acknowledgement

Supported by : 한국해양연구원

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