温度、盐度、pH对卵形鲳鲹幼鱼离体鳃组织耗氧量的影响

运用SKW-3微量呼吸仪对卵形鲳鲹（Trachinotus ovatus）幼鱼离体鳃组织的耗氧量进行了测定，研究了温度、盐度、pH对卯形鲳鲹幼鱼离体鳃组织耗氧量和单位呼吸面积耗氧量的影响。结果显示，卵形鲳鲹幼鱼离体鳃组织的耗氧量和单位呼吸面积的耗氧量均随着温度、盐度、pH的上升而逐渐增高，在水温27℃、盐度28和pH8．5时，离体鳃组织的耗氧量达到最大值；在水温27℃、盐度23和pH8．5时单位呼吸面积的耗氧量达最大值；随后耗氧量均逐渐减小。经方差分析，温度、盐度、pH对离体鳃组织耗氧量的影响均显著（P〈0．05）；温度和盐度对离体鳃组织单位呼吸面积的耗氧量影响极显著（P〈0．01）；pH对离体鳃组织单位呼吸面积的耗氧量影响也达显著水平（P〈0．05）；其中盐度为18和33这2组的离体鳃组织耗氧量差异不显著（P〉0．05）。

Effects of temperature,salinity and pH on oxygen consumption of gill tissue in vitro of juvenile Trachinotus ovatus

With SKW-3 instrument, we determined the oxygen consumption （ OC ） of gill tissue in vitro and of per unit respiratory area gill tissue in vitro of juvenile Trachinotus ovatus to investigate the effects of temperature, salinity and pH on them. The results reveal that with the increase of temperature, salinity and pH, the OC of gill tissue in vitro and of per unit respiratory area gill tissue in vitro of juvenile T. ovatus increase. Under the conditions of water temperature 27℃, salinity 28 and pH 8.5, the OC of gill tissue in vitro rea- ches the maximum value but then declines gradually ; under the conditions of water temperature 27 ~C, salinity 23 and pH 8.5, the OC of per unit respiratory area gill tissue in vitro has the same situation as above. Water temperature, salinity and pH have significant effects on the OC of gill tissue in vitro （ P 〈 0. 05 ） ; temperature and salinity have very significant effects on the OC of per unit respiratory area （ P 〈 0. 01 ） ; pH has significant effect on the OC of per unit respiratory area （ P 〈 0. 05 ）. There is no significant difference in the effects of salinity 18 and 33 on the OC of gill tissue in vitro of juvenile T. ovatus （P 〉 0. 05）.