中国科学院水生生物研究所机构知识库
Advanced  
IHB OpenIR  > 淡水生态学研究中心  > 期刊论文
题名: Day-night differences in hydroacoustic estimates of fish abundance and distribution in Lake Laojianghe, China
作者: Ye, S.1; Lian, Y.1, 2; Godlewska, M.3, 4; Liu, J.1; Li, Z.1
通讯作者: Li, Z (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Hubei Province, Peoples R China.
关键词: SPATIAL-DISTRIBUTION
刊名: JOURNAL OF APPLIED ICHTHYOLOGY
发表日期: 2013-12-01
DOI: 10.1111/jai.12367
卷: 29, 期:6, 页:1423-1429
收录类别: SCI
文章类型: Article
部门归属: [Ye, S.; Lian, Y.; Liu, J.; Li, Z.] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China; [Lian, Y.] Univ Chinese Acad Sci, Beijing, Peoples R China; [Godlewska, M.] Polish Acad Sci, European Reg Ctr Ecohydrol Auspices UNESCO, Int Inst, Lodz, Poland; [Godlewska, M.] Inst Inland Fisheries, Olsztyn, Poland
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: Bureau of International Co-operation Chinese Academy of Sciences; World Wide Fund For Nature; Special Fund for Agro-scientific Research in the Public Interest [200903048-04]
类目[WOS]: Fisheries ; Marine & Freshwater Biology
研究领域[WOS]: Fisheries ; Marine & Freshwater Biology
摘要: Hydroacoustic surveys were performed in an oxbow lake (Lake Laojianghe, China) along the Yangtze River. The study took place during the day and night in October 2012 using the Simrad EY60 split beam echo sounder. A clear day-night difference in fish densities was observed in selected transect areas. The mean density estimate at night was three times higher than during the day, while at night densities were similar in the two adjacent areas. Significantly positive relationships were found between fish density and average depth for the night and daytime transects, however, the regression slope for the daytime density estimates was much smaller than for the surveys at night. Small fish dominated the acoustic size structure during both day and night, but were more accessible at night. The average biomass estimate from the daytime transects was nearly 60% lower than those from the corresponding night transects. These results indicate that an entire lake estimate of a fish population may be severely biased if fish tend to aggregate temporarily in the bottom or littoral zone or display diurnal behaviour. The conclusion is that acoustic sampling in Lake Laojianghe is best done at night. Diel differences in the lake should be further investigated by carrying out additional day-night comparison experiments and also by using control catches.
英文摘要: Hydroacoustic surveys were performed in an oxbow lake (Lake Laojianghe, China) along the Yangtze River. The study took place during the day and night in October 2012 using the Simrad EY60 split beam echo sounder. A clear day-night difference in fish densities was observed in selected transect areas. The mean density estimate at night was three times higher than during the day, while at night densities were similar in the two adjacent areas. Significantly positive relationships were found between fish density and average depth for the night and daytime transects, however, the regression slope for the daytime density estimates was much smaller than for the surveys at night. Small fish dominated the acoustic size structure during both day and night, but were more accessible at night. The average biomass estimate from the daytime transects was nearly 60% lower than those from the corresponding night transects. These results indicate that an entire lake estimate of a fish population may be severely biased if fish tend to aggregate temporarily in the bottom or littoral zone or display diurnal behaviour. The conclusion is that acoustic sampling in Lake Laojianghe is best done at night. Diel differences in the lake should be further investigated by carrying out additional day-night comparison experiments and also by using control catches.
关键词[WOS]: SPATIAL-DISTRIBUTION
语种: 英语
WOS记录号: WOS:000327212000044
ISSN号: 0175-8659
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19766
Appears in Collections:淡水生态学研究中心_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
Day-night differences in hydroacoustic estimates of fish abundance and distribution.pdf(928KB)----开放获取View Download

作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Polish Acad Sci, European Reg Ctr Ecohydrol Auspices UNESCO, Int Inst, Lodz, Poland
4.Inst Inland Fisheries, Olsztyn, Poland
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Ye, S.]'s Articles
[Lian, Y.]'s Articles
[Godlewska, M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Ye, S.]‘s Articles
[Lian, Y.]‘s Articles
[Godlewska, M.]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Day-night differences in hydroacoustic estimates of fish abundance and distribution.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2016  中国科学院水生生物研究所 - Feedback
Powered by CSpace