Reproductive demographics, intersex, and altered hormone levels in shortnose sturgeon, Acipenser brevirostrum, from Delaware River, USA
Identifieur interne : 001117 ( Istex/Corpus ); précédent : 001116; suivant : 001118Reproductive demographics, intersex, and altered hormone levels in shortnose sturgeon, Acipenser brevirostrum, from Delaware River, USA
Auteurs : M. A. Matsche ; K. M. Rosemary ; H. M. Brundage Iii ; J. C. O'Herron IiSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2013-04.
Abstract
Non‐lethal sampling techniques were used to document the reproductive structure of the shortnose sturgeon (Acipenser brevirostrum) population at a fish aggregation site (near Bordentown, New Jersey) in the Delaware River. A total of 68 fish were captured using gill nets (100 × 1.8 m, 12.7 or 15.2 cm mesh) and examined laparoscopically in May–June, and 61 additional fish captured and examined in November during 2006–2011. Six stages of reproductive development were identified in females and five stages were identified in males, encompassing differentiation through maturity in both sexes. Fish captured in the spring were predominantly immature with a higher proportion of females (1 : 1.2 M : F sex ratio), while mature males predominated in the autumn (5.7 : 1 M : F), indicating that the Bordentown area serves as an overwintering/pre‐spawn aggregation site. Three distinct forms of intersex were noted in gonads of 11.6% of fish examined: ovo‐testis, consisting of scattered spermatic cysts in predominantly immature ovary (3.9%); testis‐ova, consisting of ovarian lamellae projecting from a predominantly immature testes (4.7%); and zonal distribution, consisting of multiple, nearly‐homogenous pockets of either testicular or ovarian tissues along the gonad (3%). The hormone profile in fish with ovo‐testis was similar to that of immature males, while the hormone profile in fish with testis‐ova was similar to that of immature females. The relatively high prevalence of intersex raises concerns regarding potential reproductive effects and long‐term impacts on shortnose sturgeon in the Delaware River.
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DOI: 10.1111/jai.12133
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ISTEX:B825C50DF56A2AD961E2CFD1333F1533F09E419DLe document en format XML
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A total of 68 fish were captured using gill nets (100 × 1.8 m, 12.7 or 15.2 cm mesh) and examined laparoscopically in May–June, and 61 additional fish captured and examined in November during 2006–2011. Six stages of reproductive development were identified in females and five stages were identified in males, encompassing differentiation through maturity in both sexes. Fish captured in the spring were predominantly immature with a higher proportion of females (1 : 1.2 M : F sex ratio), while mature males predominated in the autumn (5.7 : 1 M : F), indicating that the Bordentown area serves as an overwintering/pre‐spawn aggregation site. Three distinct forms of intersex were noted in gonads of 11.6% of fish examined: ovo‐testis, consisting of scattered spermatic cysts in predominantly immature ovary (3.9%); testis‐ova, consisting of ovarian lamellae projecting from a predominantly immature testes (4.7%); and zonal distribution, consisting of multiple, nearly‐homogenous pockets of either testicular or ovarian tissues along the gonad (3%). The hormone profile in fish with ovo‐testis was similar to that of immature males, while the hormone profile in fish with testis‐ova was similar to that of immature females. The relatively high prevalence of intersex raises concerns regarding potential reproductive effects and long‐term impacts on shortnose sturgeon in the Delaware River.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>M. A. Matsche</name><affiliations><json:string>Cooperative Oxford Laboratory, Maryland, Oxford, USA</json:string><json:string>: Mark A. 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A.</forename><surname>Matsche</surname></persName><email>mmatsche@dnr.state.md.us</email><affiliation>Cooperative Oxford Laboratory, Maryland, Oxford, USA</affiliation><affiliation>: Mark A. Matsche, Cooperative Oxford Laboratory, 904 South Morris Street, Oxford, MD 21654, USA.E‐mail:</affiliation></author><author xml:id="author-2"><persName><forename type="first">K. M.</forename><surname>Rosemary</surname></persName><affiliation>Cooperative Oxford Laboratory, Maryland, Oxford, USA</affiliation></author><author xml:id="author-3"><persName><forename type="first">H. M.</forename><surname>Brundage III</surname></persName><affiliation>Environmental Research and Consulting, Inc, Pennsylvania, Kennett Square, USA</affiliation></author><author xml:id="author-4"><persName><forename type="first">J. C.</forename><surname>O'Herron II</surname></persName><affiliation>O'Herron Biological and Environmental Consulting, Pennsylvania, Cornwall, USA</affiliation></author></analytic><monogr><title level="j">Journal of Applied Ichthyology</title><title level="j" type="abbrev">J. Appl. Ichthyol.</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><date type="published" when="2013-04"></date><biblScope unit="volume">29</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="299">299</biblScope><biblScope unit="page" to="309">309</biblScope></imprint></monogr><idno type="istex">B825C50DF56A2AD961E2CFD1333F1533F09E419D</idno><idno type="DOI">10.1111/jai.12133</idno><idno type="ArticleID">JAI12133</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2012-11-15</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>Non‐lethal sampling techniques were used to document the reproductive structure of the shortnose sturgeon (Acipenser brevirostrum) population at a fish aggregation site (near Bordentown, New Jersey) in the Delaware River. A total of 68 fish were captured using gill nets (100 × 1.8 m, 12.7 or 15.2 cm mesh) and examined laparoscopically in May–June, and 61 additional fish captured and examined in November during 2006–2011. Six stages of reproductive development were identified in females and five stages were identified in males, encompassing differentiation through maturity in both sexes. Fish captured in the spring were predominantly immature with a higher proportion of females (1 : 1.2 M : F sex ratio), while mature males predominated in the autumn (5.7 : 1 M : F), indicating that the Bordentown area serves as an overwintering/pre‐spawn aggregation site. Three distinct forms of intersex were noted in gonads of 11.6% of fish examined: ovo‐testis, consisting of scattered spermatic cysts in predominantly immature ovary (3.9%); testis‐ova, consisting of ovarian lamellae projecting from a predominantly immature testes (4.7%); and zonal distribution, consisting of multiple, nearly‐homogenous pockets of either testicular or ovarian tissues along the gonad (3%). The hormone profile in fish with ovo‐testis was similar to that of immature males, while the hormone profile in fish with testis‐ova was similar to that of immature females. The relatively high prevalence of intersex raises concerns regarding potential reproductive effects and long‐term impacts on shortnose sturgeon in the Delaware River.</p></abstract><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Original Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-04-08">Received</change><change when="2012-08-16">Registration</change><change when="2012-11-15">Created</change><change when="2013-04">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/B825C50DF56A2AD961E2CFD1333F1533F09E419D/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:id="jai12133" xml:lang="en"><header><publicationMeta level="product"><doi origin="wiley" registered="yes">10.1111/(ISSN)1439-0426</doi><issn type="print">0175-8659</issn><issn type="electronic">1439-0426</issn><idGroup><id type="product" value="JAI"></id></idGroup><titleGroup><title sort="JOURNAL OF APPLIED ICHTHYOLOGY" type="main">Journal of Applied Ichthyology</title><title type="short">J. 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Matsche, Cooperative Oxford Laboratory, 904 South Morris Street, Oxford, MD 21654, USA.</line><line>E‐mail: <email>mmatsche@dnr.state.md.us</email></line></lineatedText></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JAI.JAI12133.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Reproductive demographics, intersex, and altered hormone levels in shortnose sturgeon, <i><fc>A</fc>cipenser brevirostrum</i>, from <fc>D</fc>elaware <fc>R</fc>iver, <fc>USA</fc></title><title type="shortAuthors">M. A. Matsche et al.</title></titleGroup><creators><creator affiliationRef="#jai12133-aff-0001" corresponding="yes" creatorRole="author" xml:id="jai12133-cr-0001"><personName><givenNames>M. A.</givenNames> <familyName>Matsche</familyName></personName></creator><creator affiliationRef="#jai12133-aff-0001" creatorRole="author" xml:id="jai12133-cr-0002"><personName><givenNames>K. M.</givenNames> <familyName>Rosemary</familyName></personName></creator><creator affiliationRef="#jai12133-aff-0002" creatorRole="author" xml:id="jai12133-cr-0003"><personName><givenNames>H. M.</givenNames> <familyName>Brundage</familyName> <nameSuffix>III</nameSuffix></personName></creator><creator affiliationRef="#jai12133-aff-0003" creatorRole="author" xml:id="jai12133-cr-0004"><personName><givenNames>J. C.</givenNames> <familyName>O'Herron</familyName> <nameSuffix>II</nameSuffix></personName></creator></creators><affiliationGroup><affiliation countryCode="US" type="organization" xml:id="jai12133-aff-0001"><orgName>Cooperative Oxford Laboratory</orgName> <address><city>Oxford</city> <countryPart>Maryland</countryPart> <country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jai12133-aff-0002"><orgName>Environmental Research and Consulting, Inc</orgName> <address><city>Kennett Square</city> <countryPart>Pennsylvania</countryPart> <country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jai12133-aff-0003"><orgName>O'Herron Biological and Environmental Consulting</orgName> <address><city>Cornwall</city> <countryPart>Pennsylvania</countryPart> <country>USA</country></address></affiliation></affiliationGroup><fundingInfo><fundingAgency>National Fish and Wildlife Foundation</fundingAgency><fundingNumber>#2003‐0 206‐002 and #2006‐0 087‐001</fundingNumber></fundingInfo><fundingInfo><fundingAgency>National Marine Fisheries Service </fundingAgency><fundingNumber># NA09NMF4720043</fundingNumber></fundingInfo><fundingInfo><fundingAgency>Maryland Department of Natural Resources</fundingAgency></fundingInfo><abstractGroup><abstract type="main" xml:id="jai12133-abs-0001"><title type="main">Summary</title><p>Non‐lethal sampling techniques were used to document the reproductive structure of the shortnose sturgeon (<i><fc>A</fc>cipenser brevirostrum</i>) population at a fish aggregation site (near Bordentown, New Jersey) in the Delaware River. A total of 68 fish were captured using gill nets (100 × 1.8 m, 12.7 or 15.2 cm mesh) and examined laparoscopically in May–June, and 61 additional fish captured and examined in November during 2006–2011. Six stages of reproductive development were identified in females and five stages were identified in males, encompassing differentiation through maturity in both sexes. Fish captured in the spring were predominantly immature with a higher proportion of females (1 : 1.2 M : F sex ratio), while mature males predominated in the autumn (5.7 : 1 M : F), indicating that the Bordentown area serves as an overwintering/pre‐spawn aggregation site. Three distinct forms of intersex were noted in gonads of 11.6% of fish examined: ovo‐testis, consisting of scattered spermatic cysts in predominantly immature ovary (3.9%); testis‐ova, consisting of ovarian lamellae projecting from a predominantly immature testes (4.7%); and zonal distribution, consisting of multiple, nearly‐homogenous pockets of either testicular or ovarian tissues along the gonad (3%). The hormone profile in fish with ovo‐testis was similar to that of immature males, while the hormone profile in fish with testis‐ova was similar to that of immature females. The relatively high prevalence of intersex raises concerns regarding potential reproductive effects and long‐term impacts on shortnose sturgeon in the <fc>D</fc>elaware <fc>R</fc>iver.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Reproductive demographics, intersex, and altered hormone levels in shortnose sturgeon, Acipenser brevirostrum, from Delaware River, USA</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Reproductive demographics, intersex, and altered hormone levels in shortnose sturgeon, Acipenser brevirostrum, from Delaware River, USA</title></titleInfo><name type="personal"><namePart type="given">M. A.</namePart><namePart type="family">Matsche</namePart><affiliation>Cooperative Oxford Laboratory, Maryland, Oxford, USA</affiliation><affiliation>: Mark A. Matsche, Cooperative Oxford Laboratory, 904 South Morris Street, Oxford, MD 21654, USA.E‐mail:</affiliation><affiliation>E-mail: mmatsche@dnr.state.md.us</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K. M.</namePart><namePart type="family">Rosemary</namePart><affiliation>Cooperative Oxford Laboratory, Maryland, Oxford, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H. M.</namePart><namePart type="family">Brundage III</namePart><affiliation>Environmental Research and Consulting, Inc, Pennsylvania, Kennett Square, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. C.</namePart><namePart type="family">O'Herron II</namePart><affiliation>O'Herron Biological and Environmental Consulting, Pennsylvania, Cornwall, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2013-04</dateIssued><dateCreated encoding="w3cdtf">2012-11-15</dateCreated><dateCaptured encoding="w3cdtf">2012-04-08</dateCaptured><dateValid encoding="w3cdtf">2012-08-16</dateValid><copyrightDate encoding="w3cdtf">2013</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>Non‐lethal sampling techniques were used to document the reproductive structure of the shortnose sturgeon (Acipenser brevirostrum) population at a fish aggregation site (near Bordentown, New Jersey) in the Delaware River. A total of 68 fish were captured using gill nets (100 × 1.8 m, 12.7 or 15.2 cm mesh) and examined laparoscopically in May–June, and 61 additional fish captured and examined in November during 2006–2011. Six stages of reproductive development were identified in females and five stages were identified in males, encompassing differentiation through maturity in both sexes. Fish captured in the spring were predominantly immature with a higher proportion of females (1 : 1.2 M : F sex ratio), while mature males predominated in the autumn (5.7 : 1 M : F), indicating that the Bordentown area serves as an overwintering/pre‐spawn aggregation site. Three distinct forms of intersex were noted in gonads of 11.6% of fish examined: ovo‐testis, consisting of scattered spermatic cysts in predominantly immature ovary (3.9%); testis‐ova, consisting of ovarian lamellae projecting from a predominantly immature testes (4.7%); and zonal distribution, consisting of multiple, nearly‐homogenous pockets of either testicular or ovarian tissues along the gonad (3%). The hormone profile in fish with ovo‐testis was similar to that of immature males, while the hormone profile in fish with testis‐ova was similar to that of immature females. The relatively high prevalence of intersex raises concerns regarding potential reproductive effects and long‐term impacts on shortnose sturgeon in the Delaware River.</abstract><note type="funding">National Fish and Wildlife Foundation - No. #2003‐0 206‐002 and #2006‐0 087‐001; </note><note type="funding">National Marine Fisheries Service - No. # NA09NMF4720043; </note><note type="funding">Maryland Department of Natural Resources</note><relatedItem type="host"><titleInfo><title>Journal of Applied Ichthyology</title></titleInfo><titleInfo type="abbreviated"><title>J. Appl. Ichthyol.</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Original Article</topic></subject><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>2013</date><detail type="volume"><caption>vol.</caption><number>29</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>299</start><end>309</end><total>11</total></extent></part></relatedItem><identifier type="istex">B825C50DF56A2AD961E2CFD1333F1533F09E419D</identifier><identifier type="DOI">10.1111/jai.12133</identifier><identifier type="ArticleID">JAI12133</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2013 Blackwell Verlag GmbH© 2012 Blackwell Verlag GmbH</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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|texte= Reproductive demographics, intersex, and altered hormone levels in shortnose sturgeon, Acipenser brevirostrum, from Delaware River, USA
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