Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)

CORC > 水生生物研究所 > 中科院水生所知识产出（2009年前） > 期刊论文

	Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)
	Wei, Q. W.1,2,3; Kynard, B.4; Yang, D. G.1,2,3; Chen, X. H.1,3; Du, H.1,3; Shen, L.1,3; Zhang, H.1
刊名	JOURNAL OF APPLIED ICHTHYOLOGY
	2009-10-01
卷号	25 页码:100-106
关键词	WHITE STURGEON SHORTNOSE STURGEON LAKE STURGEON GEZHOUBA DAM HISTORY MASSACHUSETTS CONSERVATION MOVEMENT FLOW
ISSN号	0175-8659
通讯作者	Wei, QW, Chinese Acad Fisheries Sci, Key Lab Freshwater Biodivers Conservat & Utilizat, Minist Agr China, Yangtze River Fisheries Res Inst, 41 Jianghan Rd, Jingzhou City 434000, Hubei Province, Peoples R China
中文摘要	P>A sampling system for capturing sturgeon eggs using a D-shaped bottom anchored drift net was used to capture early life stages (ELS) of Chinese sturgeon, Acipenser sinensis, and monitor annual spawning success at Yichang on the Yangtze River, 1996-2004, before and just after the Three Gorges Dam began operation. Captured were 96 875 ELS (early life stages: eggs, yolk-sac larvae = eleuthero embryos, and larvae); most were eggs and only 2477 were yolk-sac larvae. Most ELS were captured in the main river channel and inside the bend at the Yichang spawning reach. Yolk-sac larvae were captured for a maximum of 3 days after hatching began, indicating quick dispersal downstream. The back-calculated day of egg fertilization over the eight years indicated a maximum spawning window of 23 days (20 October-10 November). Spawning in all years was restricted temporally, occurred mostly at night and during one or two spawning periods, each lasting several days. The brief temporal spawning window may reduce egg predation by opportunistic predators by flooding the river bottom with millions of eggs. During 1996-2002, the percentage of fertilized eggs in an annual 20-egg sample was between 63.5 to 94.1%; however, in 2003 the percentage fertilized was only 23.8%. This sudden decline may be related to the altered environmental conditions at Yichang caused by operation of the Three Gorges Dam. Further studies are needed to monitor spawning and changes in egg fertilization in this threatened population.
英文摘要	P>A sampling system for capturing sturgeon eggs using a D-shaped bottom anchored drift net was used to capture early life stages (ELS) of Chinese sturgeon, Acipenser sinensis, and monitor annual spawning success at Yichang on the Yangtze River, 1996-2004, before and just after the Three Gorges Dam began operation. Captured were 96 875 ELS (early life stages: eggs, yolk-sac larvae = eleuthero embryos, and larvae); most were eggs and only 2477 were yolk-sac larvae. Most ELS were captured in the main river channel and inside the bend at the Yichang spawning reach. Yolk-sac larvae were captured for a maximum of 3 days after hatching began, indicating quick dispersal downstream. The back-calculated day of egg fertilization over the eight years indicated a maximum spawning window of 23 days (20 October-10 November). Spawning in all years was restricted temporally, occurred mostly at night and during one or two spawning periods, each lasting several days. The brief temporal spawning window may reduce egg predation by opportunistic predators by flooding the river bottom with millions of eggs. During 1996-2002, the percentage of fertilized eggs in an annual 20-egg sample was between 63.5 to 94.1%; however, in 2003 the percentage fertilized was only 23.8%. This sudden decline may be related to the altered environmental conditions at Yichang caused by operation of the Three Gorges Dam. Further studies are needed to monitor spawning and changes in egg fertilization in this threatened population.
学科主题	Fisheries; Marine & Freshwater Biology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Fisheries ; Marine & Freshwater Biology
研究领域[WOS]	Fisheries ; Marine & Freshwater Biology
关键词[WOS]	WHITE STURGEON ; SHORTNOSE STURGEON ; LAKE STURGEON ; GEZHOUBA DAM ; HISTORY ; MASSACHUSETTS ; CONSERVATION ; MOVEMENT ; FLOW
收录类别	SCI
资助信息	Bureau of Fisheries (Ministry of Agriculture) ; Bureau of Fisheries (Hubei Province) ; Chinese sturgeon Nature Reserve, Yichang City (Hubei Province) ; National Natural Science Foundation of China [30490231, 39570564]; Three Gorges Project Office, State Department [1-03-02-01-03]; Ministry of Science and Technology [2000DIB50177, 2002DEA10004]
语种	英语
WOS记录号	WOS:000269496100017
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/7600]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Chinese Acad Fisheries Sci, Key Lab Freshwater Biodivers Conservat & Utilizat, Minist Agr China, Yangtze River Fisheries Res Inst, Jingzhou City 434000, Hubei Province, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei Province, Peoples R China 3.Chinese Acad Fisheries Sci, Freshwater Fisheries Res Ctr, Wuxi City, Peoples R China 4.US Geol Survey, Leetown Sci Ctr, SO Conte Anadromous Fish Res Ctr, Turners Falls, MA USA
推荐引用方式 GB/T 7714	Wei, Q. W.,Kynard, B.,Yang, D. G.,et al. Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)[J]. JOURNAL OF APPLIED ICHTHYOLOGY,2009,25:100-106.
APA	Wei, Q. W..,Kynard, B..,Yang, D. G..,Chen, X. H..,Du, H..,...&Zhang, H..(2009).Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis).JOURNAL OF APPLIED ICHTHYOLOGY,25,100-106.
MLA	Wei, Q. W.,et al."Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)".JOURNAL OF APPLIED ICHTHYOLOGY 25(2009):100-106.