Early development of the African catfish Clarias gariepinus (Burchell, 1822), focusing on the ontogeny of selected organs
Identifieur interne : 000F79 ( Istex/Corpus ); précédent : 000F78; suivant : 000F80Early development of the African catfish Clarias gariepinus (Burchell, 1822), focusing on the ontogeny of selected organs
Auteurs : A. G. M. Osman ; S. Wuertz ; I. A. Mekkawy ; J. Verreth ; F. KirschbaumSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2008-04.
Abstract
Embryonic development of Clarias gariepinus was studied from oocyte activation to the end of endogenous feeding (164 h post‐fertilization, 164 h‐PF). The ontogeny of the eyes, the ear, the heart, the digestive tract and the notochord were described histologically: (i) eyes were not pigmented at hatching (40 h‐PF) and the anlage of the retina was observed at 96 h‐PF. At 164 h‐PF, the pigmented epithelium was distinguished as a single layer of cubical cells and the outer nuclear layer was composed of cones; (ii) the inner ear was oval‐shaped and two otoliths and a sensory epithelium were differentiated at hatching. Three semicircular canals with rudimentary cristae developed until 96 h‐PF, leading to a fully developed auditory vesicle at 120 h‐PF; (iii) at 40 h‐PF, a beating heart appeared as a thin‐walled tube and at 72 h‐PF no blood elements were recorded in the two‐chambered heart. The four compartments (bulbus arteriosus, ventricle, atrium, sinus venosus) and mature blood elements were found only at 144 h‐PF; (iv) the hatchlings possessed an undifferentiated digestive system, and differentiation of a buccal cavity, oesophagus and intestine was only recorded 96 h‐PF. The connection between the oesophagus and the intestine and the anus opened at 144 h‐PF; (v) the notochord in newly hatched embryos was composed of vacuolated cells and a peripheral layer of notochordal epithelium inside a fibrous sheath. Subsequently, vacuolated cells proliferated and notochordal epithelium changed from cubical to squamous cells. Eye differentiation was concomitant with first feeding, thus suggesting a key role of visual senses in feeding behaviour.
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DOI: 10.1111/j.1439-0426.2007.01018.x
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The ontogeny of the eyes, the ear, the heart, the digestive tract and the notochord were described histologically: (i) eyes were not pigmented at hatching (40 h‐PF) and the anlage of the retina was observed at 96 h‐PF. At 164 h‐PF, the pigmented epithelium was distinguished as a single layer of cubical cells and the outer nuclear layer was composed of cones; (ii) the inner ear was oval‐shaped and two otoliths and a sensory epithelium were differentiated at hatching. Three semicircular canals with rudimentary cristae developed until 96 h‐PF, leading to a fully developed auditory vesicle at 120 h‐PF; (iii) at 40 h‐PF, a beating heart appeared as a thin‐walled tube and at 72 h‐PF no blood elements were recorded in the two‐chambered heart. The four compartments (bulbus arteriosus, ventricle, atrium, sinus venosus) and mature blood elements were found only at 144 h‐PF; (iv) the hatchlings possessed an undifferentiated digestive system, and differentiation of a buccal cavity, oesophagus and intestine was only recorded 96 h‐PF. The connection between the oesophagus and the intestine and the anus opened at 144 h‐PF; (v) the notochord in newly hatched embryos was composed of vacuolated cells and a peripheral layer of notochordal epithelium inside a fibrous sheath. Subsequently, vacuolated cells proliferated and notochordal epithelium changed from cubical to squamous cells. Eye differentiation was concomitant with first feeding, thus suggesting a key role of visual senses in feeding behaviour.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>A. G. M. 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G. M.</forename><surname>Osman</surname></persName><note type="biography">Current address: Zoology Department, Faculty of Science, Al‐Azhar University (Assuit Branch), Assiut, Egypt.</note><affiliation>Current address: Zoology Department, Faculty of Science, Al‐Azhar University (Assuit Branch), Assiut, Egypt.</affiliation><affiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</affiliation></author><author xml:id="author-2"><persName><forename type="first">S.</forename><surname>Wuertz</surname></persName><affiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</affiliation></author><author xml:id="author-3"><persName><forename type="first">I. A.</forename><surname>Mekkawy</surname></persName><affiliation>Department of Zoology, Faculty of Science, Assiut University, Assiut, Egypt</affiliation></author><author xml:id="author-4"><persName><forename type="first">J.</forename><surname>Verreth</surname></persName><affiliation>Department of the Fish Culture and Fisheries, Wageningen Agricultural University, Wageningen, the Netherlands</affiliation></author><author xml:id="author-5"><persName><forename type="first">F.</forename><surname>Kirschbaum</surname></persName><affiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</affiliation><affiliation>Institute of Animal Science, Faculty of Agriculture and Horticulture, Humboldt University, Berlin, Germany</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="2008-04"></date><biblScope unit="volume">24</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="187">187</biblScope><biblScope unit="page" to="195">195</biblScope></imprint></monogr><idno type="istex">6EB389A9624D1BCB36408DAFA6F2978B1103A203</idno><idno type="DOI">10.1111/j.1439-0426.2007.01018.x</idno><idno type="ArticleID">JAI1018</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2008</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Embryonic development of Clarias gariepinus was studied from oocyte activation to the end of endogenous feeding (164 h post‐fertilization, 164 h‐PF). The ontogeny of the eyes, the ear, the heart, the digestive tract and the notochord were described histologically: (i) eyes were not pigmented at hatching (40 h‐PF) and the anlage of the retina was observed at 96 h‐PF. At 164 h‐PF, the pigmented epithelium was distinguished as a single layer of cubical cells and the outer nuclear layer was composed of cones; (ii) the inner ear was oval‐shaped and two otoliths and a sensory epithelium were differentiated at hatching. Three semicircular canals with rudimentary cristae developed until 96 h‐PF, leading to a fully developed auditory vesicle at 120 h‐PF; (iii) at 40 h‐PF, a beating heart appeared as a thin‐walled tube and at 72 h‐PF no blood elements were recorded in the two‐chambered heart. The four compartments (bulbus arteriosus, ventricle, atrium, sinus venosus) and mature blood elements were found only at 144 h‐PF; (iv) the hatchlings possessed an undifferentiated digestive system, and differentiation of a buccal cavity, oesophagus and intestine was only recorded 96 h‐PF. The connection between the oesophagus and the intestine and the anus opened at 144 h‐PF; (v) the notochord in newly hatched embryos was composed of vacuolated cells and a peripheral layer of notochordal epithelium inside a fibrous sheath. Subsequently, vacuolated cells proliferated and notochordal epithelium changed from cubical to squamous cells. Eye differentiation was concomitant with first feeding, thus suggesting a key role of visual senses in feeding behaviour.</p></abstract></profileDesc><revisionDesc><change when="2008-04">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/6EB389A9624D1BCB36408DAFA6F2978B1103A203/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 version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><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><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="JOURNAL OF APPLIED ICHTHYOLOGY">Journal of Applied Ichthyology</title></titleGroup></publicationMeta><publicationMeta level="part" position="04002"><doi origin="wiley">10.1111/jai.2008.24.issue-2</doi><numberingGroup><numbering type="journalVolume" number="24">24</numbering><numbering type="journalIssue" number="2">2</numbering></numberingGroup><coverDate startDate="2008-04">April 2008</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="10" status="forIssue"><doi origin="wiley">10.1111/j.1439-0426.2007.01018.x</doi><idGroup><id type="unit" value="JAI1018"></id></idGroup><countGroup><count type="pageTotal" number="9"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><copyright>© 2007 The Authors</copyright><eventGroup><event type="firstOnline" date="2007-10-17"></event><event type="publishedOnlineFinalForm" date="2007-10-17"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText" date="2010-03-15"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-28"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-24"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="187">187</numbering><numbering type="pageLast" number="195">195</numbering></numberingGroup><correspondenceTo><b>Author’s address:</b> Alaa G. M. Osman, Zoology Department, Faculty of Science, Al‐Azhar University, Assiut, Egypt.
E‐mail: <email normalForm="osman@igb-berlin.de">osman@igb‐berlin.de</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JAI.JAI1018.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received: December 15, 2006 Accepted: May 10, 2007</unparsedEditorialHistory><countGroup><count type="figureTotal" number="8"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">Early development of the African catfish <i>Clarias gariepinus</i> (Burchell, 1822), focusing on the ontogeny of selected organs</title><title type="shortAuthors">A. G. M. Osman et al.</title><title type="short">Early development of the African catfish <i>Clarias gariepinus</i></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1" noteRef="#fn1"><personName><givenNames>A. G. M.</givenNames><familyName>Osman</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>S.</givenNames><familyName>Wuertz</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>I. A.</givenNames><familyName>Mekkawy</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>J.</givenNames><familyName>Verreth</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a1 #a4"><personName><givenNames>F.</givenNames><familyName>Kirschbaum</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="DE"><unparsedAffiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="EG"><unparsedAffiliation>Department of Zoology, Faculty of Science, Assiut University, Assiut, Egypt</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="NL"><unparsedAffiliation>Department of the Fish Culture and Fisheries, Wageningen Agricultural University, Wageningen, the Netherlands</unparsedAffiliation></affiliation><affiliation xml:id="a4" countryCode="DE"><unparsedAffiliation>Institute of Animal Science, Faculty of Agriculture and Horticulture, Humboldt University, Berlin, Germany</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>Embryonic development of <i>Clarias gariepinus</i> was studied from oocyte activation to the end of endogenous feeding (164 h post‐fertilization, 164 h‐PF). The ontogeny of the eyes, the ear, the heart, the digestive tract and the notochord were described histologically: (i) eyes were not pigmented at hatching (40 h‐PF) and the anlage of the retina was observed at 96 h‐PF. At 164 h‐PF, the pigmented epithelium was distinguished as a single layer of cubical cells and the outer nuclear layer was composed of cones; (ii) the inner ear was oval‐shaped and two otoliths and a sensory epithelium were differentiated at hatching. Three semicircular canals with rudimentary cristae developed until 96 h‐PF, leading to a fully developed auditory vesicle at 120 h‐PF; (iii) at 40 h‐PF, a beating heart appeared as a thin‐walled tube and at 72 h‐PF no blood elements were recorded in the two‐chambered heart. The four compartments (bulbus arteriosus, ventricle, atrium, sinus venosus) and mature blood elements were found only at 144 h‐PF; (iv) the hatchlings possessed an undifferentiated digestive system, and differentiation of a buccal cavity, oesophagus and intestine was only recorded 96 h‐PF. The connection between the oesophagus and the intestine and the anus opened at 144 h‐PF; (v) the notochord in newly hatched embryos was composed of vacuolated cells and a peripheral layer of notochordal epithelium inside a fibrous sheath. Subsequently, vacuolated cells proliferated and notochordal epithelium changed from cubical to squamous cells. Eye differentiation was concomitant with first feeding, thus suggesting a key role of visual senses in feeding behaviour.</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="fn1"><label>*</label><p> Current address: Zoology Department, Faculty of Science, Al‐Azhar University (Assuit Branch), Assiut, Egypt.</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Early development of the African catfish Clarias gariepinus (Burchell, 1822), focusing on the ontogeny of selected organs</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Early development of the African catfish Clarias gariepinus</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Early development of the African catfish Clarias gariepinus (Burchell, 1822), focusing on the ontogeny of selected organs</title></titleInfo><name type="personal"><namePart type="given">A. G. M.</namePart><namePart type="family">Osman</namePart><affiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</affiliation><description>Current address: Zoology Department, Faculty of Science, Al‐Azhar University (Assuit Branch), Assiut, Egypt.</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Wuertz</namePart><affiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I. A.</namePart><namePart type="family">Mekkawy</namePart><affiliation>Department of Zoology, Faculty of Science, Assiut University, Assiut, Egypt</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Verreth</namePart><affiliation>Department of the Fish Culture and Fisheries, Wageningen Agricultural University, Wageningen, the Netherlands</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Kirschbaum</namePart><affiliation>Department of Biology and Ecology of Fishes, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany</affiliation><affiliation>Institute of Animal Science, Faculty of Agriculture and Horticulture, Humboldt University, Berlin, Germany</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">2008-04</dateIssued><edition>Received: December 15, 2006 Accepted: May 10, 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">8</extent><extent unit="tables">2</extent></physicalDescription><abstract lang="en">Embryonic development of Clarias gariepinus was studied from oocyte activation to the end of endogenous feeding (164 h post‐fertilization, 164 h‐PF). The ontogeny of the eyes, the ear, the heart, the digestive tract and the notochord were described histologically: (i) eyes were not pigmented at hatching (40 h‐PF) and the anlage of the retina was observed at 96 h‐PF. At 164 h‐PF, the pigmented epithelium was distinguished as a single layer of cubical cells and the outer nuclear layer was composed of cones; (ii) the inner ear was oval‐shaped and two otoliths and a sensory epithelium were differentiated at hatching. Three semicircular canals with rudimentary cristae developed until 96 h‐PF, leading to a fully developed auditory vesicle at 120 h‐PF; (iii) at 40 h‐PF, a beating heart appeared as a thin‐walled tube and at 72 h‐PF no blood elements were recorded in the two‐chambered heart. The four compartments (bulbus arteriosus, ventricle, atrium, sinus venosus) and mature blood elements were found only at 144 h‐PF; (iv) the hatchlings possessed an undifferentiated digestive system, and differentiation of a buccal cavity, oesophagus and intestine was only recorded 96 h‐PF. The connection between the oesophagus and the intestine and the anus opened at 144 h‐PF; (v) the notochord in newly hatched embryos was composed of vacuolated cells and a peripheral layer of notochordal epithelium inside a fibrous sheath. Subsequently, vacuolated cells proliferated and notochordal epithelium changed from cubical to squamous cells. Eye differentiation was concomitant with first feeding, thus suggesting a key role of visual senses in feeding behaviour.</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>2008</date><detail type="volume"><caption>vol.</caption><number>24</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>187</start><end>195</end><total>9</total></extent></part></relatedItem><identifier type="istex">6EB389A9624D1BCB36408DAFA6F2978B1103A203</identifier><identifier type="DOI">10.1111/j.1439-0426.2007.01018.x</identifier><identifier type="ArticleID">JAI1018</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2007 The Authors</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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