Spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon in the Yangtze River
Identifieur interne : 000B24 ( Istex/Corpus ); précédent : 000B23; suivant : 000B25Spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon in the Yangtze River
Auteurs : H. Zhang ; Q. W. Wei ; B. E. Kyanrd ; H. Du ; D. G. Yang ; X. H. ChenSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2011-04.
Abstract
This study was performed to determine the spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon (Acipenser sinensis) located just downstream of the Gezhouba Dam. During the period 1996–2003, three methods were employed, including (i) the examination of the stomachs of opportunistic predatory fishes that feed on sturgeon eggs, (ii) tracking the mature sturgeons by ultrasonic tags and (iii) capturing eggs and yolk‐sac larvae (ELS) at and near the river bottom by D‐shaped bottom drift nets to monitor the spawning activities of A. sinensis. It was found that A. sinensis selected permanent locations to mate. There were two mating locations: an upstream mating area (UMA), in the tailrace of the Dajiang Hydroelectric Station and about 870 m far from the Gezhouba Dam (area, 0.1 km2), and a downstream mating area (DMA), about 2500 m from Gezhouba Dam (area, 0.3 km2). The DMA was the chief mating area and was used every year. The incubation area (for dispersal of fertilized eggs to incubate) was range from 870 m to 7 km from the dam. Generally, the total length of the spawning area was 5–7 km length (area 2.0–2.7 km2) with the range slightly varied in different spawning activities. A relief map of the riverbed and a bottom hydroacoustic survey of the DMA found a deep depression and rocky substrate. These may be important characteristics of geomorphology for the spawning area of A. sinensis.
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DOI: 10.1111/j.1439-0426.2011.01708.x
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ISTEX:3469DDFBC3CD04F418EFB3B80A9676CC7441AABELe document en format XML
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Chen</name><affiliation><mods:affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</mods:affiliation></affiliation><affiliation><mods:affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:3469DDFBC3CD04F418EFB3B80A9676CC7441AABE</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1111/j.1439-0426.2011.01708.x</idno><idno type="url">https://api.istex.fr/document/3469DDFBC3CD04F418EFB3B80A9676CC7441AABE/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000B24</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000B24</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon in the Yangtze River</title><author><name sortKey="Zhang, H" sort="Zhang, H" uniqKey="Zhang H" first="H." last="Zhang">H. Zhang</name><affiliation><mods:affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</mods:affiliation></affiliation><affiliation><mods:affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</mods:affiliation></affiliation></author><author><name sortKey="Wei, Q W" sort="Wei, Q W" uniqKey="Wei Q" first="Q. W." last="Wei">Q. W. Wei</name><affiliation><mods:affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</mods:affiliation></affiliation><affiliation><mods:affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</mods:affiliation></affiliation></author><author><name sortKey="Kyanrd, B E" sort="Kyanrd, B E" uniqKey="Kyanrd B" first="B. E." last="Kyanrd">B. E. Kyanrd</name><affiliation><mods:affiliation>BK‐Riverfish, LLC, Amherst, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Du, H" sort="Du, H" uniqKey="Du H" first="H." last="Du">H. Du</name><affiliation><mods:affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</mods:affiliation></affiliation><affiliation><mods:affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</mods:affiliation></affiliation></author><author><name sortKey="Yang, D G" sort="Yang, D G" uniqKey="Yang D" first="D. G." last="Yang">D. G. 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Chen</name><affiliation><mods:affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</mods:affiliation></affiliation><affiliation><mods:affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Applied Ichthyology</title><idno type="ISSN">0175-8659</idno><idno type="eISSN">1439-0426</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-04">2011-04</date><biblScope unit="volume">27</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="251">251</biblScope><biblScope unit="page" to="256">256</biblScope></imprint><idno type="ISSN">0175-8659</idno></series><idno type="istex">3469DDFBC3CD04F418EFB3B80A9676CC7441AABE</idno><idno type="DOI">10.1111/j.1439-0426.2011.01708.x</idno><idno type="ArticleID">JAI1708</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0175-8659</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study was performed to determine the spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon (Acipenser sinensis) located just downstream of the Gezhouba Dam. During the period 1996–2003, three methods were employed, including (i) the examination of the stomachs of opportunistic predatory fishes that feed on sturgeon eggs, (ii) tracking the mature sturgeons by ultrasonic tags and (iii) capturing eggs and yolk‐sac larvae (ELS) at and near the river bottom by D‐shaped bottom drift nets to monitor the spawning activities of A. sinensis. It was found that A. sinensis selected permanent locations to mate. There were two mating locations: an upstream mating area (UMA), in the tailrace of the Dajiang Hydroelectric Station and about 870 m far from the Gezhouba Dam (area, 0.1 km2), and a downstream mating area (DMA), about 2500 m from Gezhouba Dam (area, 0.3 km2). The DMA was the chief mating area and was used every year. The incubation area (for dispersal of fertilized eggs to incubate) was range from 870 m to 7 km from the dam. Generally, the total length of the spawning area was 5–7 km length (area 2.0–2.7 km2) with the range slightly varied in different spawning activities. A relief map of the riverbed and a bottom hydroacoustic survey of the DMA found a deep depression and rocky substrate. These may be important characteristics of geomorphology for the spawning area of A. sinensis.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>H. Zhang</name><affiliations><json:string>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</json:string><json:string>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</json:string></affiliations></json:item><json:item><name>Q. W. Wei</name><affiliations><json:string>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</json:string><json:string>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</json:string></affiliations></json:item><json:item><name>B. E. Kyanrd</name><affiliations><json:string>BK‐Riverfish, LLC, Amherst, MA, USA</json:string></affiliations></json:item><json:item><name>H. Du</name><affiliations><json:string>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</json:string><json:string>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</json:string></affiliations></json:item><json:item><name>D. 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Chen</name><affiliations><json:string>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</json:string><json:string>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</json:string></affiliations></json:item></author><articleId><json:string>JAI1708</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>This study was performed to determine the spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon (Acipenser sinensis) located just downstream of the Gezhouba Dam. During the period 1996–2003, three methods were employed, including (i) the examination of the stomachs of opportunistic predatory fishes that feed on sturgeon eggs, (ii) tracking the mature sturgeons by ultrasonic tags and (iii) capturing eggs and yolk‐sac larvae (ELS) at and near the river bottom by D‐shaped bottom drift nets to monitor the spawning activities of A. sinensis. It was found that A. sinensis selected permanent locations to mate. There were two mating locations: an upstream mating area (UMA), in the tailrace of the Dajiang Hydroelectric Station and about 870 m far from the Gezhouba Dam (area, 0.1 km2), and a downstream mating area (DMA), about 2500 m from Gezhouba Dam (area, 0.3 km2). The DMA was the chief mating area and was used every year. The incubation area (for dispersal of fertilized eggs to incubate) was range from 870 m to 7 km from the dam. Generally, the total length of the spawning area was 5–7 km length (area 2.0–2.7 km2) with the range slightly varied in different spawning activities. A relief map of the riverbed and a bottom hydroacoustic survey of the DMA found a deep depression and rocky substrate. 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W.</forename><surname>Wei</surname></persName><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation></author><author xml:id="author-3"><persName><forename type="first">B. E.</forename><surname>Kyanrd</surname></persName><affiliation>BK‐Riverfish, LLC, Amherst, MA, USA</affiliation></author><author xml:id="author-4"><persName><forename type="first">H.</forename><surname>Du</surname></persName><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation></author><author xml:id="author-5"><persName><forename type="first">D. G.</forename><surname>Yang</surname></persName><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation></author><author xml:id="author-6"><persName><forename type="first">X. H.</forename><surname>Chen</surname></persName><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation></author></analytic><monogr><title level="j">Journal of Applied Ichthyology</title><idno type="pISSN">0175-8659</idno><idno type="eISSN">1439-0426</idno><idno type="DOI">10.1111/(ISSN)1439-0426</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-04"></date><biblScope unit="volume">27</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="251">251</biblScope><biblScope unit="page" to="256">256</biblScope></imprint></monogr><idno type="istex">3469DDFBC3CD04F418EFB3B80A9676CC7441AABE</idno><idno type="DOI">10.1111/j.1439-0426.2011.01708.x</idno><idno type="ArticleID">JAI1708</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2011</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>This study was performed to determine the spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon (Acipenser sinensis) located just downstream of the Gezhouba Dam. During the period 1996–2003, three methods were employed, including (i) the examination of the stomachs of opportunistic predatory fishes that feed on sturgeon eggs, (ii) tracking the mature sturgeons by ultrasonic tags and (iii) capturing eggs and yolk‐sac larvae (ELS) at and near the river bottom by D‐shaped bottom drift nets to monitor the spawning activities of A. sinensis. It was found that A. sinensis selected permanent locations to mate. There were two mating locations: an upstream mating area (UMA), in the tailrace of the Dajiang Hydroelectric Station and about 870 m far from the Gezhouba Dam (area, 0.1 km2), and a downstream mating area (DMA), about 2500 m from Gezhouba Dam (area, 0.3 km2). The DMA was the chief mating area and was used every year. The incubation area (for dispersal of fertilized eggs to incubate) was range from 870 m to 7 km from the dam. Generally, the total length of the spawning area was 5–7 km length (area 2.0–2.7 km2) with the range slightly varied in different spawning activities. A relief map of the riverbed and a bottom hydroacoustic survey of the DMA found a deep depression and rocky substrate. 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E‐mail: <email>weiqw@yfi.ac.cn</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JAI.JAI1708.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received: August 12, 2010 Accepted: November 27, 2010</unparsedEditorialHistory><countGroup><count type="figureTotal" number="4"></count><count type="tableTotal" number="3"></count></countGroup><titleGroup><title type="main">Spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon in the Yangtze River</title><title type="shortAuthors">H. Zhang et al.</title><title type="short">Characteristics of spawning area of Chinese sturgeon</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1 #a2"><personName><givenNames>H.</givenNames><familyName>Zhang</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1 #a2"><personName><givenNames>Q. W.</givenNames><familyName>Wei</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a3"><personName><givenNames>B. E.</givenNames><familyName>Kyanrd</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a1 #a2"><personName><givenNames>H.</givenNames><familyName>Du</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a1 #a2"><personName><givenNames>D. G.</givenNames><familyName>Yang</familyName></personName></creator><creator creatorRole="author" xml:id="cr6" affiliationRef="#a1 #a2"><personName><givenNames>X. H.</givenNames><familyName>Chen</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="CN"><unparsedAffiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="CN"><unparsedAffiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="US"><unparsedAffiliation>BK‐Riverfish, LLC, Amherst, MA, USA</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>This study was performed to determine the spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon (<i>Acipenser sinensis</i>) located just downstream of the Gezhouba Dam. During the period 1996–2003, three methods were employed, including (i) the examination of the stomachs of opportunistic predatory fishes that feed on sturgeon eggs, (ii) tracking the mature sturgeons by ultrasonic tags and (iii) capturing eggs and yolk‐sac larvae (ELS) at and near the river bottom by D‐shaped bottom drift nets to monitor the spawning activities of <i>A. sinensis</i>. It was found that <i>A. sinensis</i> selected permanent locations to mate. There were two mating locations: an upstream mating area (UMA), in the tailrace of the Dajiang Hydroelectric Station and about 870 m far from the Gezhouba Dam (area, 0.1 km<sup>2</sup>), and a downstream mating area (DMA), about 2500 m from Gezhouba Dam (area, 0.3 km<sup>2</sup>). The DMA was the chief mating area and was used every year. The incubation area (for dispersal of fertilized eggs to incubate) was range from 870 m to 7 km from the dam. Generally, the total length of the spawning area was 5–7 km length (area 2.0–2.7 km<sup>2</sup>) with the range slightly varied in different spawning activities. A relief map of the riverbed and a bottom hydroacoustic survey of the DMA found a deep depression and rocky substrate. These may be important characteristics of geomorphology for the spawning area of <i>A. sinensis</i>.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon in the Yangtze River</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Characteristics of spawning area of Chinese sturgeon</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon in the Yangtze River</title></titleInfo><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Zhang</namePart><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Q. W.</namePart><namePart type="family">Wei</namePart><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B. E.</namePart><namePart type="family">Kyanrd</namePart><affiliation>BK‐Riverfish, LLC, Amherst, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Du</namePart><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D. G.</namePart><namePart type="family">Yang</namePart><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">X. H.</namePart><namePart type="family">Chen</namePart><affiliation>Key Laboratory of Freshwater Biodiversity Conservation and Utilization, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Jingzhou, Hubei, China</affiliation><affiliation>Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, Jiangsu, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2011-04</dateIssued><edition>Received: August 12, 2010 Accepted: November 27, 2010</edition><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">4</extent><extent unit="tables">3</extent></physicalDescription><abstract lang="en">This study was performed to determine the spatial structure and bottom characteristics of the only remaining spawning area of Chinese sturgeon (Acipenser sinensis) located just downstream of the Gezhouba Dam. During the period 1996–2003, three methods were employed, including (i) the examination of the stomachs of opportunistic predatory fishes that feed on sturgeon eggs, (ii) tracking the mature sturgeons by ultrasonic tags and (iii) capturing eggs and yolk‐sac larvae (ELS) at and near the river bottom by D‐shaped bottom drift nets to monitor the spawning activities of A. sinensis. It was found that A. sinensis selected permanent locations to mate. There were two mating locations: an upstream mating area (UMA), in the tailrace of the Dajiang Hydroelectric Station and about 870 m far from the Gezhouba Dam (area, 0.1 km2), and a downstream mating area (DMA), about 2500 m from Gezhouba Dam (area, 0.3 km2). The DMA was the chief mating area and was used every year. The incubation area (for dispersal of fertilized eggs to incubate) was range from 870 m to 7 km from the dam. Generally, the total length of the spawning area was 5–7 km length (area 2.0–2.7 km2) with the range slightly varied in different spawning activities. A relief map of the riverbed and a bottom hydroacoustic survey of the DMA found a deep depression and rocky substrate. These may be important characteristics of geomorphology for the spawning area of A. sinensis.</abstract><relatedItem type="host"><titleInfo><title>Journal of Applied Ichthyology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0175-8659</identifier><identifier type="eISSN">1439-0426</identifier><identifier type="DOI">10.1111/(ISSN)1439-0426</identifier><identifier type="PublisherID">JAI</identifier><part><date>2011</date><detail type="title"><title>Proceedings of the 6th International Symposium on Sturgeon Wuhan, China October 25‐31, 2009</title></detail><detail type="volume"><caption>vol.</caption><number>27</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>251</start><end>256</end><total>6</total></extent></part></relatedItem><identifier type="istex">3469DDFBC3CD04F418EFB3B80A9676CC7441AABE</identifier><identifier type="DOI">10.1111/j.1439-0426.2011.01708.x</identifier><identifier type="ArticleID">JAI1708</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 Blackwell Verlag, Berlin</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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