Effects of Environmental Factors on Natural Reproduction of the Four Major Chinese Carps in the Yangtze River, China

CORC > 水生生物研究所 > 中科院水生所知识产出（2009年前） > 水生生物多样性与资源保护研究中心 > 期刊论文

	Effects of Environmental Factors on Natural Reproduction of the Four Major Chinese Carps in the Yangtze River, China
	Li, Mingzheng 1,2,3; Gao, Xin 1,2; Yang, Shaorong 1,2,3; Duan, Zhonghua 1,2; Cao, Wenxuan 1,2; Liu, Huanzhuang 1,2
刊名	ZOOLOGICAL SCIENCE
	2013-04-01
卷号	30 期号:4 页码:296-303
关键词	hydrological meteorological natural spawning activity the four Chinese major carps classification and regression trees
ISSN号	0289-0003
通讯作者	Liu, HZ (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China.
中文摘要	The four major Chinese carps are commercially important fish species with high production in China. However, their recruitment decreased sharply in the Yangtze River since the late 20th century. In the present study, to reveal the relationships between spawning activities of the four species and environmental factors, drifting eggs were collected at Yidu City, in the middle reaches of the Yangtze River, from May to July each year between 2005 and 2010. Classification and regression trees (CART) analysis was applied to identify the key factors associated with spawning activities of the four carp species. Twelve predictor variables (hydrological and meteorological variables) and one response variable (egg presence or number of egg) were included in the CART. Our CART analysis showed that water temperature and the diurnal increase of water level were the two most significant factors for the spawning activities. When water temperature was between 18 degrees C and 24 degrees C, especially in association with the diurnal increase of water level greater than 0.55 m.d(-1), spawning activities was always favored. Unlike the hydrological factors, meteorological factors seemed to have no influence on initiating the spawning activities. The density of drifting eggs of the four species was mainly influenced by the diurnal variation of water level, the diurnal variation of water discharge, water temperature, humidity, and air pressure. We then related our results to the ecological regulation of the Three Gorge Reservoir in the middle reaches of the Yangtze River. We suggested that, when water temperature was between 18-24 degrees C from May to July, to ensure the successful spawning of the four carp species, the ecological regulation should be managed to create flood peaks and make the diurnal increase of water level greater than 0.55 m.d(-1).
英文摘要	The four major Chinese carps are commercially important fish species with high production in China. However, their recruitment decreased sharply in the Yangtze River since the late 20th century. In the present study, to reveal the relationships between spawning activities of the four species and environmental factors, drifting eggs were collected at Yidu City, in the middle reaches of the Yangtze River, from May to July each year between 2005 and 2010. Classification and regression trees (CART) analysis was applied to identify the key factors associated with spawning activities of the four carp species. Twelve predictor variables (hydrological and meteorological variables) and one response variable (egg presence or number of egg) were included in the CART. Our CART analysis showed that water temperature and the diurnal increase of water level were the two most significant factors for the spawning activities. When water temperature was between 18 degrees C and 24 degrees C, especially in association with the diurnal increase of water level greater than 0.55 m.d(-1), spawning activities was always favored. Unlike the hydrological factors, meteorological factors seemed to have no influence on initiating the spawning activities. The density of drifting eggs of the four species was mainly influenced by the diurnal variation of water level, the diurnal variation of water discharge, water temperature, humidity, and air pressure. We then related our results to the ecological regulation of the Three Gorge Reservoir in the middle reaches of the Yangtze River. We suggested that, when water temperature was between 18-24 degrees C from May to July, to ensure the successful spawning of the four carp species, the ecological regulation should be managed to create flood peaks and make the diurnal increase of water level greater than 0.55 m.d(-1).
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Zoology
研究领域[WOS]	Zoology
关键词[WOS]	WATER TEMPERATURE ; ABIOTIC FACTORS ; FISH ; HABITAT ; RECRUITMENT ; FLOODPLAIN ; FLOW ; BEHAVIOR ; CRITERIA ; CLIMATE
收录类别	SCI
资助信息	Three Gorges Project eco-environmental monitoring system [JJ [2011]-028]; National Natural Science foundation of China [NSFC 31061160185]
语种	英语
WOS记录号	WOS:000316574600008
公开日期	2013-10-31
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/19261]
专题	水生生物研究所_水生生物多样性与资源保护研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China 2.Chinese Acad Sci, Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Li, Mingzheng,Gao, Xin,Yang, Shaorong,et al. Effects of Environmental Factors on Natural Reproduction of the Four Major Chinese Carps in the Yangtze River, China[J]. ZOOLOGICAL SCIENCE,2013,30(4):296-303.
APA	Li, Mingzheng,Gao, Xin,Yang, Shaorong,Duan, Zhonghua,Cao, Wenxuan,&Liu, Huanzhuang.(2013).Effects of Environmental Factors on Natural Reproduction of the Four Major Chinese Carps in the Yangtze River, China.ZOOLOGICAL SCIENCE,30(4),296-303.
MLA	Li, Mingzheng,et al."Effects of Environmental Factors on Natural Reproduction of the Four Major Chinese Carps in the Yangtze River, China".ZOOLOGICAL SCIENCE 30.4(2013):296-303.