Ultrastructure of the oocyte envelopes of some Eurasian acipenserids
Identifieur interne : 000883 ( Istex/Corpus ); précédent : 000882; suivant : 000884Ultrastructure of the oocyte envelopes of some Eurasian acipenserids
Auteurs : L. Debus ; M. Winkler ; R. BillardSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2008-06.
Abstract
The cellular and acellular envelopes of oocytes and follicles at the ultrastructural level are described for some acipenserids. The objective was to identify whether morphological features exist that can assist in discrimination of caviar products in trade originating from various species. The follicular envelopes include one thecal and one follicular cell layer separated by a basal lamina. The oocyte is surrounded by four acellular layers: (i) the internal zona radiata directly in contact with the oocyte plasma membrane; (ii) the external zona radiata; (iii) a layer of alveolar material; and (iv) a thin adhesive layer probably secreted by the follicular cells. These structures are similar in the eggs of genus Acipenser and Huso. Comparison of descriptions and definitions from different authors reveal a confusing terminology and sometimes different terms are used for similar structures. A terminology for the envelopes of Acipenseriform eggs is proposed. The authors conclude that morphological characters of sturgeon eggs are less valuable for discrimination of caviar.
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DOI: 10.1111/j.1439-0426.2008.01093.x
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The objective was to identify whether morphological features exist that can assist in discrimination of caviar products in trade originating from various species. The follicular envelopes include one thecal and one follicular cell layer separated by a basal lamina. The oocyte is surrounded by four acellular layers: (i) the internal zona radiata directly in contact with the oocyte plasma membrane; (ii) the external zona radiata; (iii) a layer of alveolar material; and (iv) a thin adhesive layer probably secreted by the follicular cells. These structures are similar in the eggs of genus Acipenser and Huso. Comparison of descriptions and definitions from different authors reveal a confusing terminology and sometimes different terms are used for similar structures. A terminology for the envelopes of Acipenseriform eggs is proposed. 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E‐mail: <email>LutzDebus@hotmail.com</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JAI.JAI1093.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received: August 7, 2007 Accepted: December 15, 2007</unparsedEditorialHistory><countGroup><count type="figureTotal" number="6"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">Ultrastructure of the oocyte envelopes of some Eurasian acipenserids</title><title type="shortAuthors">L. Debus, M. Winkler and R. Billard</title><title type="short">Ultrastructure of the oocyte envelopes</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1 #a2"><personName><givenNames>L.</givenNames><familyName>Debus</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>M.</givenNames><familyName>Winkler</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>R.</givenNames><familyName>Billard</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="DE"><unparsedAffiliation>Fachbereich Biologie, Universität Rostock, 18051 Rostock, Germany</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="FR"><unparsedAffiliation>Museum National d`Historie Naturelle, 43 rue Cuvier, 75005 Paris, France</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>The cellular and acellular envelopes of oocytes and follicles at the ultrastructural level are described for some acipenserids. The objective was to identify whether morphological features exist that can assist in discrimination of caviar products in trade originating from various species. The follicular envelopes include one thecal and one follicular cell layer separated by a basal lamina. The oocyte is surrounded by four acellular layers: (i) the internal zona radiata directly in contact with the oocyte plasma membrane; (ii) the external zona radiata; (iii) a layer of alveolar material; and (iv) a thin adhesive layer probably secreted by the follicular cells. These structures are similar in the eggs of genus <i>Acipenser</i> and <i>Huso.</i> Comparison of descriptions and definitions from different authors reveal a confusing terminology and sometimes different terms are used for similar structures. A terminology for the envelopes of Acipenseriform eggs is proposed. The authors conclude that morphological characters of sturgeon eggs are less valuable for discrimination of caviar.</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="fn1" numbered="no"><p>The authors have not declared any conflict of interests.</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Ultrastructure of the oocyte envelopes of some Eurasian acipenserids</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Ultrastructure of the oocyte envelopes</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Ultrastructure of the oocyte envelopes of some Eurasian acipenserids</title></titleInfo><name type="personal"><namePart type="given">L.</namePart><namePart type="family">Debus</namePart><affiliation>Fachbereich Biologie, Universität Rostock, 18051 Rostock, Germany</affiliation><affiliation>Museum National d`Historie Naturelle, 43 rue Cuvier, 75005 Paris, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Winkler</namePart><affiliation>Fachbereich Biologie, Universität Rostock, 18051 Rostock, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Billard</namePart><affiliation>Museum National d`Historie Naturelle, 43 rue Cuvier, 75005 Paris, France</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">2008-06</dateIssued><edition>Received: August 7, 2007 Accepted: December 15, 2007</edition><copyrightDate encoding="w3cdtf">2008</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">6</extent><extent unit="tables">2</extent></physicalDescription><abstract lang="en">The cellular and acellular envelopes of oocytes and follicles at the ultrastructural level are described for some acipenserids. The objective was to identify whether morphological features exist that can assist in discrimination of caviar products in trade originating from various species. The follicular envelopes include one thecal and one follicular cell layer separated by a basal lamina. The oocyte is surrounded by four acellular layers: (i) the internal zona radiata directly in contact with the oocyte plasma membrane; (ii) the external zona radiata; (iii) a layer of alveolar material; and (iv) a thin adhesive layer probably secreted by the follicular cells. These structures are similar in the eggs of genus Acipenser and Huso. Comparison of descriptions and definitions from different authors reveal a confusing terminology and sometimes different terms are used for similar structures. A terminology for the envelopes of Acipenseriform eggs is proposed. 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