Effects of hypoxia on survival,behavior,and metabolism of Zhikong scallop Chlamys farreri Jones et Preston 1904

IOCAS-IR

	Effects of hypoxia on survival,behavior,and metabolism of Zhikong scallop Chlamys farreri Jones et Preston 1904
	LI Qiao ; ZHANG Fang ; WANG Minxiao ; LI Mengna ; SUN Song
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2020-03-15
出版年	2020
卷号	v.38 期号:02 页码:46-61
文献类型	CNKI期刊论文
摘要	Hypoxia,a frequent occurring threat in coastal regions,often results in mass mortalities of marine organisms and brings a serious ecological problem.The commercially important Zhikong scallop Chlamys farreri is being under such a threat as the risks of eutrophication and hypoxia have risen in their culture areas.However,little information has been known concerning their tolerance to hypoxia and their strategy for survival.In the present study,a 20-day experiment was conducted to determine the ef fects of hypoxia on the survival,behavior,and metabolism of Zhikong scallop.With the LC_(50) for dissolved oxygen(DO) being estimated as 1.8 mg/L,the survival of Zhikong scallop can be greatly challenged even under the moderate hypoxic condition of around 2.0 mg/L DO.The survival rate ranged from 69% to 59% when DO dropped from 3.0 to 2.0 mg/L,and it was further reduced to 47% at 1.5 mg/L DO.In hypoxic conditions,the scallops became significantly active,which may be explained as escape attempts to avoid hypoxic water.To save energy,Zhikong scallop would depress their respiration.However,when DO dropped from 3.0 to 2.0 mg/L,the oxygen consumption rate hardly changed.The upregulation of lactate dehydrogenase activity and the unrepressed phosphofructokinase activity,which often result in the unbalanced cellular homeostasis and energy budget,may account for the observed increase in the mortality rate of Zhikong scallops.In general,Zhikong scallop is sensitive to hypoxia events,though possible escape attempts,depressed respiration,and oxaloacetate-pathway may increase their survival chance.
关键词	hypoxia Zhikong scallop survival behavior metabolism
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A006;
CNKI专题名称	生物学;
分类号	Q958
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the NSFC-Shandong Joint Fund for Marine Ecology and Environmental Sciences(No.U1606404) ; the Strategic Priority Research Program of the Chinese Academy of Sciences(Nos.XDA19060201,XDA23050501) ; the National Key R&D Program of China(No.2017YFC1404405) ; the Taishan Scholars Project to SUN Song
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/188274
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences
推荐引用方式 GB/T 7714	LI Qiao,ZHANG Fang,WANG Minxiao,et al. Effects of hypoxia on survival,behavior,and metabolism of Zhikong scallop Chlamys farreri Jones et Preston 1904. 2020.