低氧胁迫对香港牡蛎摄食和代谢的影响  

Effects of Hypoxia Stress on Ingestion and Metabolism of Crassostrea hongkongensis

作　　者：马元 张兴志 何苹萍 官俊良 韦嫔媛 张立 李蔚 朱鹏 许尤厚 严雪瑜 陈晓汉 彭金霞 MA Yuan;ZHANG Xing-zhi;HE Ping-ping;GUAN Jun-liang;WEI Pin-yuan;ZHANG Li;LI Wei;ZHU Peng;XU You-hou;YAN Xue-yu;CHEN Xiao-han;PENG Jin-xia(College of Oceanography,Beibu Gulf University,Qinzhou 535011,China;Guangxi Academy of Fisheries Sciences,Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture,Nanning 530021,China)

机构地区：[1]北部湾大学海洋学院,广西钦州535011 [2]广西水产科学研究院广西水产遗传育种与健康养殖重点实验室,广西南宁530021

出　　处：《广东海洋大学学报》2022年第3期127-133,共7页Journal of Guangdong Ocean University

基　　金：广西重点研发项目(桂科AB21196030);广西自然科学基金青年基金(2019GXNSFBA245081);广西创新驱动发展专项(桂AA17204094-3);国家现代农业(贝类)产业技术体系建设项目(CARS-49)。

摘　　要：【目的】探究不同氧浓度胁迫对香港牡蛎(Crassostrea hongkongensis)摄食和代谢的影响。【方法】比较0.5、1、2、3 mg/L等低氧和常氧条件下,香港牡蛎的摄食率(I)、个体摄食率(Iind)、单位体质量的摄食率(Imass)、耗氧率(RO)和排氨率(RN)的变化规律,并进一步分析急性低氧和48 h持续低氧对香港牡蛎摄食和代谢的影响。【结果】不同低氧条件下,香港牡蛎各项指标均随溶解氧(Dissolved oxygen,DO)质量浓度的下降而降低,并且急性低氧处理组摄食和代谢强度下降幅度均大于持续低氧48 h组。急性低氧组溶解氧浓度与摄食率的相关关系为I1=31.225 lnρ(DO)+35.509,R^(2)=0.9805,Iind、Imass、R0、RN的变化范围分别为5×107~4.8×10^(8)个/(只∙h)、7×10^(7)~4.8×10^(8)个/(g∙h)、0.1~0.7 mg/(g∙h)、4~25μg/(g∙h)。持续低氧48 h组溶解氧质量浓度与摄食率的相关关系为I2=36.439 lnρ(DO)+19.163,R^(2)=0.8397,Iind、Imass、R0、RN的变化范围分别为1.2×10^(8)~5.3×10^(8)个/(只∙h)、1.1×10^(8)~4.8×10^(8)个/(g∙h)、0.2~0.8 mg/(g∙h)、18~32μg/(g∙h)。【结论】香港牡蛎的摄食和代谢受水环境中溶解氧质量浓度影响,氧质量浓度越低,摄食和代谢水平越低,经低氧环境适应48 h后,摄食和代谢能力可产生一定水平恢复,但仍低于常氧水平。【Objective】To explore the effects of different oxygen concentration stress on ingestion and metabolism of Hong Kong oyster(Crassostrea hongkongensis).【Method】Comparing the changes of ingestion rate(I),unit individual ingestion rate(Iind),unit mass ingestion rate(Imass),oxygen consumption rate(RO)and ammonia excretion rate(RN)of the oysters under hypoxia conditions of 0.5,1,2 and 3 mg/L,and oxygen concentration of the control group is≥5 mg/L The effects of acute hypoxia and 48 h continuous hypoxia on feeding and metabolism of C.hongkongensis were further analyzed.【Result】Under different hypoxia conditions,all indexes of C.hongkongensis decreased with the decrease of dissolved oxygen(DO),and the decrease of feeding and metabolic intensity in acute hypoxia treatment group was greater than that in continuous hypoxia for 48 hours.The correlation between dissolved oxygen concentration and feeding percentage in acute hypoxia group was I1=31.225lnρ(DO)+35.509,R^(2)=0.9805,The variation ranges of Iind,Imass,RO,RN were 0.5-4.8 ind^(-1)∙h^(-1),7×10^(7)-4.8×10^(8)ind-1∙h-1,0.1-0.7 mg/(g∙h),4-25μg/(g∙h).The relationship between the concentration of dissolved oxygen and the percentage of ingestion in 48 h in continuous hypoxia group was I2=36.439lnρ(DO)+19.163,R²=0.8397,The variation ranges of Iind,Imass,RO,RN were 1.2-5.3 ind^(-1)∙h^(-1),1.1×10^(8)-4.8×10^(8)g^(-1)∙h^(-1),0.2-0.8 mg/(g∙h),18-32μg/(g∙h)respectively.【Conclusion】The feeding and metabolism of C.hongkongensis were affected by the concentration of dissolved oxygen in the water,and the lower the oxygen concentration was,the lower the feeding and metabolism rate was.After 48 hours of adapting to the low-oxygen environment,the feeding and metabolism capacity could recover to a certain level,but lower than those at the normal oxygen level.

关 键 词：香港牡蛎 低氧胁迫 摄食 耗氧率 排氨率 

分 类 号：S917.4[农业科学—水产科学]