plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
송미해·이근수·강필준·박혜미·오승용*
한국해양과학기술원 해양생명자원연구부
The influence of water temperature (15, 20, and 25°C) and salinity (0, 15, and 30 psu) on the oxygen consumption rate (OCR) of black sea bream Acanthopagrus schlegelii (mean body weight = 203.1 g) was determined using a closed flow-through respirometer. The OCR was significantly affected by water temperature (P<0.001), salinity (P<0.001), and their interaction (P<0.05). With increasing water temperature (15-25°C), OCR exhibited a linearly increasing relationship expressed as OCR= -124.6890+13.1903T (r2=0.92, P<0.0001), OCR=-85.8624+12.2555T (r2=0.79, P<0.001), and OCR=-150.6132+20.3146T (r2=0.79, P<0.001) at 0, 15, and 30 psu, respectively. The OCR values significantly decreased with decreasing salinity at all experimental water temperatures. The range of Q10 values was 2.87-4.78, 1.32-2.15, and 2.48-2.89 between 15 and 20°C, 20 and 25°C, and 15 and 25°C, respectively. Metabolic energy expenditure was higher in response to increased water temperature (increase of 148.2-189.0%) increase than in response to increased salinity (increase of 70.5-98.7%). These results contribute to a quantitative understanding of the effects of water temperature and salinity on the metabolic costs to black sea bream and provide basic data for the bioenergetic analysis of adaptation to environmental changes under our experimental conditions.
Metabolic cost, Thermal change, Low salinity, Euryhaline, Teleost