关键词: 珍珠龙胆石斑鱼, 水温, 盐度, 低溶解氧, 耐受能力, pearl gentian grouper (Epinephelus fuscoguttatus♀×E. lanceolatus♂), temperature, salinity, dissolved oxygen, tolerance

Abstract: The study was conducted to study the tolerance ability to the temperature, salinity, dissolved oxygen and other environmental factors changes of pearl pentian grouper (Epinephelus fuscoguttatus♀× E. lanceolatus♂). Healthy pearl gentian groupers were selected to conduct the gradient experiment. The average body weight of pearl gentian grouper was 121.4~277.5 g and the average body length was 174~229 mm. The results showed that the tolerance ability of pearl gentian grouper on the temperature, salinity and dissolved oxygen was widely. The optimum temperature range was 20.0~35.0℃, the lower critical temperature was 10.0℃, and the upper critical temperature was 39.0℃; the optimum salinity was 11.0~40.0, and the lower critical salinity was 3.0; the critical suffocation point was 0.70 mg/L，the DO50 was 0.67mg/L，and DO100 was 0.60 mg/L.