A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny
Identifieur interne : 000E80 ( Istex/Corpus ); précédent : 000E79; suivant : 000E81A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny
Auteurs : Enric Gisbert ; Adriana Rodriguez ; Francesc Castell Orvay ; Patrick WilliotSource :
- Aquaculture [ 0044-8486 ] ; 1998.
Abstract
Histological development of the digestive tract of Siberian sturgeon during early life stages (1–21 days post hatch) was studied using light microscopy. At hatching, the digestive tract is represented by a gastric cavity filled with yolk and lined by endodermal cells, and a partially differentiated hindgut; and does not communicate with the exterior as the mouth and anus are not yet opened. During the endogenous feeding phase, yolk sac resorption, stomach differentiation into a gizzard and glandular region, and the development of the anterior, intermediate region and spiral valve of the intestine are the most conspicuous elements of development. At onset of exogenous feeding (9 days post hatch), yolk sac reserves are not completely depleted from the cardiac stomach, suggesting a period of mixed nutrition. Fat is accumulated in the anterior and intermediate regions of the intestine confirming the greater resistance of larvae to long periods of starvation. At this time, the alimentary canal presents the morphological digestive features characteristic of juvenile and adult stages. The buccopharynx is lined by a pseudostratified cylindrical epithelium with teeth and numerous taste buds. The esophagus is constituted by ciliated and mucous cells which are organised in two different regions. The non-glandular stomach presents a simple columnar epithelium and a prominent tunica muscularis, while the glandular stomach epithelium consists of cuboidal cells, with numerous simple and tubular gastric glands. The anterior and intermediate regions of the intestine are similar, lined by a columnar ciliated epithelium and can be distinguished by the major number and size of mucosal folds and level of vacuolisation of the intermediate intestine. The spiral valve is lined by a simple columnar ciliated epithelium with supranuclear vacuoles. Present results reveal that the ontogenetic development of the digestive tract of Siberian sturgeon is similar in comparison with other Acipenserid species. However, there exist several differences referred to the differentiation time of some digestive structures, such as the differentiation of the pyloric and cardiac stomach, the development of gastric glands, and the acquisition of an anatomically alimentary canal similar to those of juveniles and adults, which affect first feeding time and, the rearing and husbandry of Siberian sturgeon larvae.
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DOI: 10.1016/S0044-8486(98)00312-3
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny</title><author><name sortKey="Gisbert, Enric" sort="Gisbert, Enric" uniqKey="Gisbert E" first="Enric" last="Gisbert">Enric Gisbert</name><affiliation><mods:affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</mods:affiliation></affiliation><affiliation><mods:affiliation>Corresponding author. Tel.: +34 3 4021447; fax: +34 3 4035740; e-mail: gisbert@porthos.bio.ub.es</mods:affiliation></affiliation></author><author><name sortKey="Rodriguez, Adriana" sort="Rodriguez, Adriana" uniqKey="Rodriguez A" first="Adriana" last="Rodriguez">Adriana Rodriguez</name><affiliation><mods:affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</mods:affiliation></affiliation></author><author><name sortKey="Castell Orvay, Francesc" sort="Castell Orvay, Francesc" uniqKey="Castell Orvay F" first="Francesc" last="Castell Orvay">Francesc Castell Orvay</name><affiliation><mods:affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</mods:affiliation></affiliation></author><author><name sortKey="Williot, Patrick" sort="Williot, Patrick" uniqKey="Williot P" first="Patrick" last="Williot">Patrick Williot</name><affiliation><mods:affiliation>Cemagref, Groupement de Bordeaux, Resources Aquatiques Continentales, 50 avenue de Verdum, BP 3, 33611 Gazinet Cedex, France</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:9472F218F3BBF383C1E92823A7EFFD3939326EB8</idno><date when="1998" year="1998">1998</date><idno type="doi">10.1016/S0044-8486(98)00312-3</idno><idno type="url">https://api.istex.fr/document/9472F218F3BBF383C1E92823A7EFFD3939326EB8/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000E80</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000E80</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny</title><author><name sortKey="Gisbert, Enric" sort="Gisbert, Enric" uniqKey="Gisbert E" first="Enric" last="Gisbert">Enric Gisbert</name><affiliation><mods:affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</mods:affiliation></affiliation><affiliation><mods:affiliation>Corresponding author. Tel.: +34 3 4021447; fax: +34 3 4035740; e-mail: gisbert@porthos.bio.ub.es</mods:affiliation></affiliation></author><author><name sortKey="Rodriguez, Adriana" sort="Rodriguez, Adriana" uniqKey="Rodriguez A" first="Adriana" last="Rodriguez">Adriana Rodriguez</name><affiliation><mods:affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</mods:affiliation></affiliation></author><author><name sortKey="Castell Orvay, Francesc" sort="Castell Orvay, Francesc" uniqKey="Castell Orvay F" first="Francesc" last="Castell Orvay">Francesc Castell Orvay</name><affiliation><mods:affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</mods:affiliation></affiliation></author><author><name sortKey="Williot, Patrick" sort="Williot, Patrick" uniqKey="Williot P" first="Patrick" last="Williot">Patrick Williot</name><affiliation><mods:affiliation>Cemagref, Groupement de Bordeaux, Resources Aquatiques Continentales, 50 avenue de Verdum, BP 3, 33611 Gazinet Cedex, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Aquaculture</title><title level="j" type="abbrev">AQUA</title><idno type="ISSN">0044-8486</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998">1998</date><biblScope unit="volume">167</biblScope><biblScope unit="issue">3–4</biblScope><biblScope unit="page" from="195">195</biblScope><biblScope unit="page" to="209">209</biblScope></imprint><idno type="ISSN">0044-8486</idno></series><idno type="istex">9472F218F3BBF383C1E92823A7EFFD3939326EB8</idno><idno type="DOI">10.1016/S0044-8486(98)00312-3</idno><idno type="PII">S0044-8486(98)00312-3</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0044-8486</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Histological development of the digestive tract of Siberian sturgeon during early life stages (1–21 days post hatch) was studied using light microscopy. At hatching, the digestive tract is represented by a gastric cavity filled with yolk and lined by endodermal cells, and a partially differentiated hindgut; and does not communicate with the exterior as the mouth and anus are not yet opened. During the endogenous feeding phase, yolk sac resorption, stomach differentiation into a gizzard and glandular region, and the development of the anterior, intermediate region and spiral valve of the intestine are the most conspicuous elements of development. At onset of exogenous feeding (9 days post hatch), yolk sac reserves are not completely depleted from the cardiac stomach, suggesting a period of mixed nutrition. Fat is accumulated in the anterior and intermediate regions of the intestine confirming the greater resistance of larvae to long periods of starvation. At this time, the alimentary canal presents the morphological digestive features characteristic of juvenile and adult stages. The buccopharynx is lined by a pseudostratified cylindrical epithelium with teeth and numerous taste buds. The esophagus is constituted by ciliated and mucous cells which are organised in two different regions. The non-glandular stomach presents a simple columnar epithelium and a prominent tunica muscularis, while the glandular stomach epithelium consists of cuboidal cells, with numerous simple and tubular gastric glands. The anterior and intermediate regions of the intestine are similar, lined by a columnar ciliated epithelium and can be distinguished by the major number and size of mucosal folds and level of vacuolisation of the intermediate intestine. The spiral valve is lined by a simple columnar ciliated epithelium with supranuclear vacuoles. Present results reveal that the ontogenetic development of the digestive tract of Siberian sturgeon is similar in comparison with other Acipenserid species. However, there exist several differences referred to the differentiation time of some digestive structures, such as the differentiation of the pyloric and cardiac stomach, the development of gastric glands, and the acquisition of an anatomically alimentary canal similar to those of juveniles and adults, which affect first feeding time and, the rearing and husbandry of Siberian sturgeon larvae.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>Enric Gisbert</name><affiliations><json:string>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</json:string><json:string>Corresponding author. Tel.: +34 3 4021447; fax: +34 3 4035740; e-mail: gisbert@porthos.bio.ub.es</json:string></affiliations></json:item><json:item><name>Adriana Rodriguez</name><affiliations><json:string>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</json:string></affiliations></json:item><json:item><name>Francesc Castelló-Orvay</name><affiliations><json:string>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</json:string></affiliations></json:item><json:item><name>Patrick Williot</name><affiliations><json:string>Cemagref, Groupement de Bordeaux, Resources Aquatiques Continentales, 50 avenue de Verdum, BP 3, 33611 Gazinet Cedex, France</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Histology</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Light microscopy</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Digestive system</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Siberian sturgeon</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Larvae</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Ontogeny</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Histological development of the digestive tract of Siberian sturgeon during early life stages (1–21 days post hatch) was studied using light microscopy. At hatching, the digestive tract is represented by a gastric cavity filled with yolk and lined by endodermal cells, and a partially differentiated hindgut; and does not communicate with the exterior as the mouth and anus are not yet opened. During the endogenous feeding phase, yolk sac resorption, stomach differentiation into a gizzard and glandular region, and the development of the anterior, intermediate region and spiral valve of the intestine are the most conspicuous elements of development. At onset of exogenous feeding (9 days post hatch), yolk sac reserves are not completely depleted from the cardiac stomach, suggesting a period of mixed nutrition. Fat is accumulated in the anterior and intermediate regions of the intestine confirming the greater resistance of larvae to long periods of starvation. At this time, the alimentary canal presents the morphological digestive features characteristic of juvenile and adult stages. The buccopharynx is lined by a pseudostratified cylindrical epithelium with teeth and numerous taste buds. The esophagus is constituted by ciliated and mucous cells which are organised in two different regions. The non-glandular stomach presents a simple columnar epithelium and a prominent tunica muscularis, while the glandular stomach epithelium consists of cuboidal cells, with numerous simple and tubular gastric glands. The anterior and intermediate regions of the intestine are similar, lined by a columnar ciliated epithelium and can be distinguished by the major number and size of mucosal folds and level of vacuolisation of the intermediate intestine. The spiral valve is lined by a simple columnar ciliated epithelium with supranuclear vacuoles. Present results reveal that the ontogenetic development of the digestive tract of Siberian sturgeon is similar in comparison with other Acipenserid species. However, there exist several differences referred to the differentiation time of some digestive structures, such as the differentiation of the pyloric and cardiac stomach, the development of gastric glands, and the acquisition of an anatomically alimentary canal similar to those of juveniles and adults, which affect first feeding time and, the rearing and husbandry of Siberian sturgeon larvae.</abstract><qualityIndicators><score>7.283</score><pdfVersion>1.2</pdfVersion><pdfPageSize>435 x 643 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>6</keywordCount><abstractCharCount>2406</abstractCharCount><pdfWordCount>4283</pdfWordCount><pdfCharCount>26225</pdfCharCount><pdfPageCount>15</pdfPageCount><abstractWordCount>356</abstractWordCount></qualityIndicators><title>A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny</title><pii><json:string>S0044-8486(98)00312-3</json:string></pii><genre><json:string>research-article</json:string></genre><host><volume>167</volume><pii><json:string>S0044-8486(00)X0073-7</json:string></pii><pages><last>209</last><first>195</first></pages><issn><json:string>0044-8486</json:string></issn><issue>3–4</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><title>Aquaculture</title><publicationDate>1998</publicationDate></host><categories><wos><json:string>science</json:string><json:string>marine & freshwater biology</json:string><json:string>fisheries</json:string></wos><scienceMetrix><json:string>applied sciences</json:string><json:string>agriculture, fisheries & forestry</json:string><json:string>fisheries</json:string></scienceMetrix></categories><publicationDate>1998</publicationDate><copyrightDate>1998</copyrightDate><doi><json:string>10.1016/S0044-8486(98)00312-3</json:string></doi><id>9472F218F3BBF383C1E92823A7EFFD3939326EB8</id><score>0.068651184</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/9472F218F3BBF383C1E92823A7EFFD3939326EB8/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/9472F218F3BBF383C1E92823A7EFFD3939326EB8/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/9472F218F3BBF383C1E92823A7EFFD3939326EB8/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a">A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©1998 Elsevier Science B.V.</p></availability><date>1998</date></publicationStmt><notesStmt><note type="content">Fig. 1: Hatching. Sagittal section of the head showing the buccopharyngeal cavity (BC) still closed (indicated by an asterisk), epithelial cells covering the anterior section of the buccopharyngeal cavity with vacuoles filled with some rests of pigment granules (indicated by an arrow). Yolk sac (YS), eye (E), rudimentary olfactory organ (O), brain (B). H&E (4×).</note><note type="content">Fig. 2: Day 9 post hatching. Cross-section of the buccopharyngeal cavity showing taste buds (TB) and goblet cells (GC) in the buccopharyngeal cuboidal epithelium. Branchial arches (B), cartilaginous tissue (C). H&E (×10).</note><note type="content">Fig. 3: Day 9 post hatching. Detail of a tooth of the buccopharyngeal epithelium (BE). Enamel (E), dentine (D), root canal (R), pulp cavity (PC), buccopharyngeal lumen (BL), cartilaginous tissue (C). H&E (×40).</note><note type="content">Fig. 4: Day 5 post hatching. Sagittal section of the developing esophagus. Pseudostratified esophageal epithelium (E) with supranuclear vacuoles filled with some rests of pigment granules (indicated by an arrow). Goblet cells (GC), esophageal lumen (EL), liver (L), pronefros (P). H&E (×25).</note><note type="content">Fig. 5: Day 13 post hatching. Detail of the pseudostratified esophageal epithelium showing two differentiated zones, a secretory anterior region with goblet cells (AE) and a posterior segment with large microvilli specialized in food transport (PE). H&E (×40).</note><note type="content">Fig. 6: Day 5 post hatching. Cross-section of the non-glandular stomach (NS) and anterior intestine (AI). The anterior intestine presents some rests of yolk (Y). Liver (L), heart (H), yolk sac (YS), epidermis (E). H&E (×10).</note><note type="content">Fig. 7: Day 9 post hatching. Non-glandular stomach (NS) separated from the anterior intestine (AI) by an epithelial fold (EF). Note the presence of food particles (F) in the anterior intestine. Liver (L), pancreas (P), cartilaginous tissue (C), epidermis (E). H&E (×10).</note><note type="content">Fig. 8: Day 11 post hatching. Proximal region of the anterior intestine (AI) with lipid vacuoles (LV). The glandular stomach (GS) with several gastric glands (GG) and some rests of yolk (Y) in its lumen is also noticeable. Intestinal lumen (IL), glandular stomach lumen (SL), brush border (B). H&E (10×).</note><note type="content">Fig. 9: Day 9 post hatching. Sagittal section of the spiral valve at first exogenous feeding, showing the presence of the melanin plug (indicated by an arrow) and food particles (F) in its lumen. H&E (10×).</note><note type="content">Fig. 10: Day 11 post hatching. Sagittal section of the terminal portion of the intestine differentiated into a short rectal duct (R) lined by a cuboidal epithelium. Urinary bladder (U). H&E (16×).</note><note type="content">Table 1: Summary of the main developmental events occurring in Siberian sturgeon digestive tract (see text for details)</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a">A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny</title><author xml:id="author-1"><persName><forename type="first">Enric</forename><surname>Gisbert</surname></persName><affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</affiliation><affiliation>Corresponding author. Tel.: +34 3 4021447; fax: +34 3 4035740; e-mail: gisbert@porthos.bio.ub.es</affiliation></author><author xml:id="author-2"><persName><forename type="first">Adriana</forename><surname>Rodriguez</surname></persName><affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</affiliation></author><author xml:id="author-3"><persName><forename type="first">Francesc</forename><surname>Castelló-Orvay</surname></persName><affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</affiliation></author><author xml:id="author-4"><persName><forename type="first">Patrick</forename><surname>Williot</surname></persName><affiliation>Cemagref, Groupement de Bordeaux, Resources Aquatiques Continentales, 50 avenue de Verdum, BP 3, 33611 Gazinet Cedex, France</affiliation></author></analytic><monogr><title level="j">Aquaculture</title><title level="j" type="abbrev">AQUA</title><idno type="pISSN">0044-8486</idno><idno type="PII">S0044-8486(00)X0073-7</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998"></date><biblScope unit="volume">167</biblScope><biblScope unit="issue">3–4</biblScope><biblScope unit="page" from="195">195</biblScope><biblScope unit="page" to="209">209</biblScope></imprint></monogr><idno type="istex">9472F218F3BBF383C1E92823A7EFFD3939326EB8</idno><idno type="DOI">10.1016/S0044-8486(98)00312-3</idno><idno type="PII">S0044-8486(98)00312-3</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1998</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Histological development of the digestive tract of Siberian sturgeon during early life stages (1–21 days post hatch) was studied using light microscopy. At hatching, the digestive tract is represented by a gastric cavity filled with yolk and lined by endodermal cells, and a partially differentiated hindgut; and does not communicate with the exterior as the mouth and anus are not yet opened. During the endogenous feeding phase, yolk sac resorption, stomach differentiation into a gizzard and glandular region, and the development of the anterior, intermediate region and spiral valve of the intestine are the most conspicuous elements of development. At onset of exogenous feeding (9 days post hatch), yolk sac reserves are not completely depleted from the cardiac stomach, suggesting a period of mixed nutrition. Fat is accumulated in the anterior and intermediate regions of the intestine confirming the greater resistance of larvae to long periods of starvation. At this time, the alimentary canal presents the morphological digestive features characteristic of juvenile and adult stages. The buccopharynx is lined by a pseudostratified cylindrical epithelium with teeth and numerous taste buds. The esophagus is constituted by ciliated and mucous cells which are organised in two different regions. The non-glandular stomach presents a simple columnar epithelium and a prominent tunica muscularis, while the glandular stomach epithelium consists of cuboidal cells, with numerous simple and tubular gastric glands. The anterior and intermediate regions of the intestine are similar, lined by a columnar ciliated epithelium and can be distinguished by the major number and size of mucosal folds and level of vacuolisation of the intermediate intestine. The spiral valve is lined by a simple columnar ciliated epithelium with supranuclear vacuoles. Present results reveal that the ontogenetic development of the digestive tract of Siberian sturgeon is similar in comparison with other Acipenserid species. However, there exist several differences referred to the differentiation time of some digestive structures, such as the differentiation of the pyloric and cardiac stomach, the development of gastric glands, and the acquisition of an anatomically alimentary canal similar to those of juveniles and adults, which affect first feeding time and, the rearing and husbandry of Siberian sturgeon larvae.</p></abstract><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>Histology</term></item><item><term>Light microscopy</term></item><item><term>Digestive system</term></item><item><term>Siberian sturgeon</term></item><item><term>Larvae</term></item><item><term>Ontogeny</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1998">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/9472F218F3BBF383C1E92823A7EFFD3939326EB8/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="fx1" NDATA="IMAGE" name="fx1"></istex:entity><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="gr3"></istex:entity><istex:entity SYSTEM="gr4" NDATA="IMAGE" name="gr4"></istex:entity><istex:entity SYSTEM="gr5" NDATA="IMAGE" name="gr5"></istex:entity><istex:entity SYSTEM="gr6" NDATA="IMAGE" name="gr6"></istex:entity><istex:entity SYSTEM="gr7" NDATA="IMAGE" name="gr7"></istex:entity><istex:entity SYSTEM="gr8" NDATA="IMAGE" name="gr8"></istex:entity><istex:entity SYSTEM="gr9" NDATA="IMAGE" name="gr9"></istex:entity><istex:entity SYSTEM="gr10" NDATA="IMAGE" name="gr10"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>AQUA</jid><aid>60613</aid><ce:pii>S0044-8486(98)00312-3</ce:pii><ce:doi>10.1016/S0044-8486(98)00312-3</ce:doi><ce:copyright year="1998" type="full-transfer">Elsevier Science B.V.</ce:copyright></item-info><head><ce:title>A histological study of the development of the digestive tract of Siberian sturgeon (<ce:italic>Acipenser baeri</ce:italic>) during early ontogeny</ce:title><ce:author-group><ce:author><ce:given-name>Enric</ce:given-name><ce:surname>Gisbert</ce:surname><ce:cross-ref refid="AFF1">a</ce:cross-ref><ce:cross-ref refid="CORR1">*</ce:cross-ref></ce:author><ce:author><ce:given-name>Adriana</ce:given-name><ce:surname>Rodriguez</ce:surname><ce:cross-ref refid="AFF1">a</ce:cross-ref></ce:author><ce:author><ce:given-name>Francesc</ce:given-name><ce:surname>Castelló-Orvay</ce:surname><ce:cross-ref refid="AFF1">a</ce:cross-ref></ce:author><ce:author><ce:given-name>Patrick</ce:given-name><ce:surname>Williot</ce:surname><ce:cross-ref refid="AFF2">b</ce:cross-ref></ce:author><ce:affiliation id="AFF1"><ce:label>a</ce:label><ce:textfn>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</ce:textfn></ce:affiliation><ce:affiliation id="AFF2"><ce:label>b</ce:label><ce:textfn>Cemagref, Groupement de Bordeaux, Resources Aquatiques Continentales, 50 avenue de Verdum, BP 3, 33611 Gazinet Cedex, France</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author. Tel.: +34 3 4021447; fax: +34 3 4035740; e-mail: gisbert@porthos.bio.ub.es</ce:text></ce:correspondence></ce:author-group><ce:date-accepted day="23" month="6" year="1998"></ce:date-accepted><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>Histological development of the digestive tract of Siberian sturgeon during early life stages (1–21 days post hatch) was studied using light microscopy. At hatching, the digestive tract is represented by a gastric cavity filled with yolk and lined by endodermal cells, and a partially differentiated hindgut; and does not communicate with the exterior as the mouth and anus are not yet opened. During the endogenous feeding phase, yolk sac resorption, stomach differentiation into a gizzard and glandular region, and the development of the anterior, intermediate region and spiral valve of the intestine are the most conspicuous elements of development. At onset of exogenous feeding (9 days post hatch), yolk sac reserves are not completely depleted from the cardiac stomach, suggesting a period of mixed nutrition. Fat is accumulated in the anterior and intermediate regions of the intestine confirming the greater resistance of larvae to long periods of starvation. At this time, the alimentary canal presents the morphological digestive features characteristic of juvenile and adult stages. The buccopharynx is lined by a pseudostratified cylindrical epithelium with teeth and numerous taste buds. The esophagus is constituted by ciliated and mucous cells which are organised in two different regions. The non-glandular stomach presents a simple columnar epithelium and a prominent tunica muscularis, while the glandular stomach epithelium consists of cuboidal cells, with numerous simple and tubular gastric glands. The anterior and intermediate regions of the intestine are similar, lined by a columnar ciliated epithelium and can be distinguished by the major number and size of mucosal folds and level of vacuolisation of the intermediate intestine. The spiral valve is lined by a simple columnar ciliated epithelium with supranuclear vacuoles. Present results reveal that the ontogenetic development of the digestive tract of Siberian sturgeon is similar in comparison with other Acipenserid species. However, there exist several differences referred to the differentiation time of some digestive structures, such as the differentiation of the pyloric and cardiac stomach, the development of gastric glands, and the acquisition of an anatomically alimentary canal similar to those of juveniles and adults, which affect first feeding time and, the rearing and husbandry of Siberian sturgeon larvae.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Histology</ce:text></ce:keyword><ce:keyword><ce:text>Light microscopy</ce:text></ce:keyword><ce:keyword><ce:text>Digestive system</ce:text></ce:keyword><ce:keyword><ce:text>Siberian sturgeon</ce:text></ce:keyword><ce:keyword><ce:text>Larvae</ce:text></ce:keyword><ce:keyword><ce:text>Ontogeny</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>A histological study of the development of the digestive tract of Siberian sturgeon ( Acipenser baeri ) during early ontogeny</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>A histological study of the development of the digestive tract of Siberian sturgeon (</title></titleInfo><name type="personal"><namePart type="given">Enric</namePart><namePart type="family">Gisbert</namePart><affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</affiliation><affiliation>Corresponding author. Tel.: +34 3 4021447; fax: +34 3 4035740; e-mail: gisbert@porthos.bio.ub.es</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Adriana</namePart><namePart type="family">Rodriguez</namePart><affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Francesc</namePart><namePart type="family">Castelló-Orvay</namePart><affiliation>Laboratori d'Aqüicultura, Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Patrick</namePart><namePart type="family">Williot</namePart><affiliation>Cemagref, Groupement de Bordeaux, Resources Aquatiques Continentales, 50 avenue de Verdum, BP 3, 33611 Gazinet Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1998</dateIssued><copyrightDate encoding="w3cdtf">1998</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Histological development of the digestive tract of Siberian sturgeon during early life stages (1–21 days post hatch) was studied using light microscopy. At hatching, the digestive tract is represented by a gastric cavity filled with yolk and lined by endodermal cells, and a partially differentiated hindgut; and does not communicate with the exterior as the mouth and anus are not yet opened. During the endogenous feeding phase, yolk sac resorption, stomach differentiation into a gizzard and glandular region, and the development of the anterior, intermediate region and spiral valve of the intestine are the most conspicuous elements of development. At onset of exogenous feeding (9 days post hatch), yolk sac reserves are not completely depleted from the cardiac stomach, suggesting a period of mixed nutrition. Fat is accumulated in the anterior and intermediate regions of the intestine confirming the greater resistance of larvae to long periods of starvation. At this time, the alimentary canal presents the morphological digestive features characteristic of juvenile and adult stages. The buccopharynx is lined by a pseudostratified cylindrical epithelium with teeth and numerous taste buds. The esophagus is constituted by ciliated and mucous cells which are organised in two different regions. The non-glandular stomach presents a simple columnar epithelium and a prominent tunica muscularis, while the glandular stomach epithelium consists of cuboidal cells, with numerous simple and tubular gastric glands. The anterior and intermediate regions of the intestine are similar, lined by a columnar ciliated epithelium and can be distinguished by the major number and size of mucosal folds and level of vacuolisation of the intermediate intestine. The spiral valve is lined by a simple columnar ciliated epithelium with supranuclear vacuoles. Present results reveal that the ontogenetic development of the digestive tract of Siberian sturgeon is similar in comparison with other Acipenserid species. However, there exist several differences referred to the differentiation time of some digestive structures, such as the differentiation of the pyloric and cardiac stomach, the development of gastric glands, and the acquisition of an anatomically alimentary canal similar to those of juveniles and adults, which affect first feeding time and, the rearing and husbandry of Siberian sturgeon larvae.</abstract><note type="content">Fig. 1: Hatching. Sagittal section of the head showing the buccopharyngeal cavity (BC) still closed (indicated by an asterisk), epithelial cells covering the anterior section of the buccopharyngeal cavity with vacuoles filled with some rests of pigment granules (indicated by an arrow). Yolk sac (YS), eye (E), rudimentary olfactory organ (O), brain (B). H&E (4×).</note><note type="content">Fig. 2: Day 9 post hatching. Cross-section of the buccopharyngeal cavity showing taste buds (TB) and goblet cells (GC) in the buccopharyngeal cuboidal epithelium. Branchial arches (B), cartilaginous tissue (C). H&E (×10).</note><note type="content">Fig. 3: Day 9 post hatching. Detail of a tooth of the buccopharyngeal epithelium (BE). Enamel (E), dentine (D), root canal (R), pulp cavity (PC), buccopharyngeal lumen (BL), cartilaginous tissue (C). H&E (×40).</note><note type="content">Fig. 4: Day 5 post hatching. Sagittal section of the developing esophagus. Pseudostratified esophageal epithelium (E) with supranuclear vacuoles filled with some rests of pigment granules (indicated by an arrow). Goblet cells (GC), esophageal lumen (EL), liver (L), pronefros (P). H&E (×25).</note><note type="content">Fig. 5: Day 13 post hatching. Detail of the pseudostratified esophageal epithelium showing two differentiated zones, a secretory anterior region with goblet cells (AE) and a posterior segment with large microvilli specialized in food transport (PE). H&E (×40).</note><note type="content">Fig. 6: Day 5 post hatching. Cross-section of the non-glandular stomach (NS) and anterior intestine (AI). The anterior intestine presents some rests of yolk (Y). Liver (L), heart (H), yolk sac (YS), epidermis (E). H&E (×10).</note><note type="content">Fig. 7: Day 9 post hatching. Non-glandular stomach (NS) separated from the anterior intestine (AI) by an epithelial fold (EF). Note the presence of food particles (F) in the anterior intestine. Liver (L), pancreas (P), cartilaginous tissue (C), epidermis (E). H&E (×10).</note><note type="content">Fig. 8: Day 11 post hatching. Proximal region of the anterior intestine (AI) with lipid vacuoles (LV). The glandular stomach (GS) with several gastric glands (GG) and some rests of yolk (Y) in its lumen is also noticeable. Intestinal lumen (IL), glandular stomach lumen (SL), brush border (B). H&E (10×).</note><note type="content">Fig. 9: Day 9 post hatching. Sagittal section of the spiral valve at first exogenous feeding, showing the presence of the melanin plug (indicated by an arrow) and food particles (F) in its lumen. H&E (10×).</note><note type="content">Fig. 10: Day 11 post hatching. Sagittal section of the terminal portion of the intestine differentiated into a short rectal duct (R) lined by a cuboidal epithelium. Urinary bladder (U). H&E (16×).</note><note type="content">Table 1: Summary of the main developmental events occurring in Siberian sturgeon digestive tract (see text for details)</note><subject><genre>Keywords</genre><topic>Histology</topic><topic>Light microscopy</topic><topic>Digestive system</topic><topic>Siberian sturgeon</topic><topic>Larvae</topic><topic>Ontogeny</topic></subject><relatedItem type="host"><titleInfo><title>Aquaculture</title></titleInfo><titleInfo type="abbreviated"><title>AQUA</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">19980901</dateIssued></originInfo><identifier type="ISSN">0044-8486</identifier><identifier type="PII">S0044-8486(00)X0073-7</identifier><part><date>19980901</date><detail type="volume"><number>167</number><caption>vol.</caption></detail><detail type="issue"><number>3–4</number><caption>no.</caption></detail><extent unit="issue pages"><start>163</start><end>356</end></extent><extent unit="pages"><start>195</start><end>209</end></extent></part></relatedItem><identifier type="istex">9472F218F3BBF383C1E92823A7EFFD3939326EB8</identifier><identifier type="DOI">10.1016/S0044-8486(98)00312-3</identifier><identifier type="PII">S0044-8486(98)00312-3</identifier><accessCondition type="use and reproduction" contentType="copyright">©1998 Elsevier Science B.V.</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>Elsevier Science B.V., ©1998</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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