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Day-night differences in hydroacoustic estimates of fish abundance and distribution in Lake Laojianghe, China
Ye, S.1; Lian, Y.1,2; Godlewska, M.3,4; Liu, J.1; Li, Z.1; Li, Z (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Hubei Province, Peoples R China.
2013-12-01
Source PublicationJOURNAL OF APPLIED ICHTHYOLOGY
ISSN0175-8659
Volume29Issue:6Pages:1423-1429
AbstractHydroacoustic 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.; 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.
SubtypeArticle
KeywordSpatial-distribution
Department[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
DOI10.1111/jai.12367
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationBureau 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] ; 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] ; 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] ; 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]
Indexed BySCI
Language英语
WOS Research AreaFisheries ; Marine & Freshwater Biology
WOS SubjectFisheries ; Marine & Freshwater Biology
WOS IDWOS:000327212000044
WOS KeywordSPATIAL-DISTRIBUTION
Funding OrganizationBureau 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] ; 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] ; 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] ; 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]
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/19766
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorLi, Z (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Hubei Province, Peoples R China.
Affiliation1.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
Recommended Citation
GB/T 7714
Ye, S.,Lian, Y.,Godlewska, M.,et al. Day-night differences in hydroacoustic estimates of fish abundance and distribution in Lake Laojianghe, China[J]. JOURNAL OF APPLIED ICHTHYOLOGY,2013,29(6):1423-1429.
APA Ye, S.,Lian, Y.,Godlewska, M.,Liu, J.,Li, Z.,&Li, Z .(2013).Day-night differences in hydroacoustic estimates of fish abundance and distribution in Lake Laojianghe, China.JOURNAL OF APPLIED ICHTHYOLOGY,29(6),1423-1429.
MLA Ye, S.,et al."Day-night differences in hydroacoustic estimates of fish abundance and distribution in Lake Laojianghe, China".JOURNAL OF APPLIED ICHTHYOLOGY 29.6(2013):1423-1429.
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