【摘要】 采用密闭呼吸室法,研究了不同温度(11、15、19、23、27和31℃)下暗纹东方鲀和菊黄东方鲀幼鱼(约20 g)单位体重瞬时耗氧速率的变化规律,及其与溶氧水平的关系。结果表明:暗纹东方鲀和菊黄东方鲀幼鱼瞬时耗氧速率(V)均随实验时间(t)增加而降低,且呈现良好的幂函数负增长相关(V=a tb,r2>0.98,P<0.01);在适宜溶氧范围内,暗纹东方鲀和菊黄东方鲀幼鱼属于顺应呼吸型,V随溶氧水平降低而降低,但在临近临界点时,暗纹东方鲀和菊黄东方鲀幼鱼耗氧率均表现为"调节管理"模式,即幼鱼用增加呼吸频率来保持一定的耗氧率,以维持基本的生命活动,而V与溶氧水平(DO)呈现良好的二次函数关系(r2>0.95,p<0.01);暗纹东方鲀和菊黄东方鲀幼鱼耗氧率均随水温升高而升高,呈现良好的直线增长相关(r2>0.95,P<0.01);在常规池塘养殖水温范围内,暗纹东方鲀幼鱼的耗氧率比菊黄东方鲀高;暗纹东方鲀和菊黄东方鲀幼鱼Q10值分别是2.84和2.65。建议在暗纹东方鲀和菊黄东方鲀的实际养殖和运输过程中,当溶氧水平低于3 mg/L时,应及时启动急救措施。更多还原

【Abstract】 The instantaneous oxygen consumption rates of obscure puffer(Takifugu obscurus) and tawny puffer(Takifugu flavidus) juveniles(about 20 g mean weight) were measured by closed-chamber respiration methods at seven temperatures(11,15,19,23,27,and 31 ℃).The results showed that the instantaneous oxygen consumption rates(V) of obscure puffer and tawny puffer juveniles decreased as the experimental time(t) increased,showing the power law model(V=a tb,r2>0.98,p<0.01).Within suitable dissolved oxygen range,the oxygen consumptions of obscure puffer and tawny puffer juveniles were both directly related to the concentration which could be denoted as "conformers",i.e.V decreased with decreased dissolved oxygen level,whereas,below that range,the juveniles maintain a constant oxygen consumption rate to ensure the basic life activities,regardless of the concentration of dissolved oxygen,and there are the so-called "regulators".The oxygen consumption rate and dissolved oxygen had a significant quadratic relationship(r2>0.95,p<0.01).The oxygen consumption rate increased rapidly as the temperature increased(11-31 ℃),showing a linear relationship in the range of temperatures investigated(r2>0.95,p<0.01).Within the temperature range of the conventional pond culture,the oxygen consumptions of obscure puffer juvenile were higher than that of tawny puffer.The Q10 of obscure puffer and tawny puffer juveniles were 2.84 and 2.65,respectively.In actual culture and transport processes of obscure puffer and tawny puffer,when dissolved oxygen level is below 3 mg/L,the emergency aid measures should be started.更多还原