Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning stress and growth
Identifieur interne : 001421 ( Istex/Corpus ); précédent : 001420; suivant : 001422Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning stress and growth
Auteurs : Andrea Ziková ; Achim Trubiroha ; Claudia Wiegand ; Sven Wuertz ; Bernhard Rennert ; Stephan Pflugmacher ; Radovan Kopp ; Jan Mareš ; Werner KloasSource :
- Environmental Toxicology and Chemistry [ 0730-7268 ] ; 2010-03.
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Abstract
Diets containing Microcystis with considerable amounts of the cyanotoxin microcystin‐LR (MC‐LR) were fed to determine their impact on the physiological performance of the omnivorous Nile tilapia (Oreochromis niloticus) with regard to stress and growth performance. Four different diets were prepared based on a commercial diet (control, MC‐5% [containing 5% dried Microcystis biomass], MC‐20% [containing 20% dried Microcystis biomass], and Arthrospira‐20% [containing 20% dried Arthrospira sp. biomass without toxin]) and fed to female Nile tilapia. Blood and tissue samples were taken after 1, 7, and 28 d, and MC‐LR was quantified in gills, muscle, and liver by using high‐performance liquid chromatography (HPLC). Only in the liver were moderate concentrations of MC‐LR detected. The stress hormone cortisol and glucose were analyzed from plasma, suggesting that all modified diets caused only minor to moderate stress, which was confirmed by analyses of hepatic glycogen. In addition, the effects of the different diets on growth performance were investigated by determining gene expression of hypophyseal growth hormone (GH) and hepatic insulin‐like growth factor‐I (IGF‐I). For all diets, quantitative reverse transcription‐polymerase chain reaction (RT‐qPCR) demonstrated no significant effect on gene expression of the major endocrine hormones of the growth axis, whereas classical growth data, including growth and feed conversion ratio, displayed slight inhibitory effects of all modified diets independent of their MC‐LR content. However, no significant change was found in condition or hepatosomatic index among the various diets, so it seems feasible that dried cyanobacterial biomass might be even used as a component in fish diet for Nile tilapia, which requires further research in more detail. Environ. Toxicol. Chem. 2010;29:561–568. © 2009 SETAC
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DOI: 10.1002/etc.76
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A" first="Andrea" last="Ziková">Andrea Ziková</name><affiliation><mods:affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</mods:affiliation></affiliation><affiliation><mods:affiliation>Centre for Cyanobacteria and Their Toxins (Institute of Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic.</mods:affiliation></affiliation></author><author><name sortKey="Trubiroha, Achim" sort="Trubiroha, Achim" uniqKey="Trubiroha A" first="Achim" last="Trubiroha">Achim Trubiroha</name><affiliation><mods:affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</mods:affiliation></affiliation></author><author><name sortKey="Wiegand, Claudia" sort="Wiegand, Claudia" uniqKey="Wiegand C" first="Claudia" last="Wiegand">Claudia Wiegand</name><affiliation><mods:affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</mods:affiliation></affiliation></author><author><name sortKey="Wuertz, Sven" sort="Wuertz, Sven" uniqKey="Wuertz S" first="Sven" last="Wuertz">Sven Wuertz</name><affiliation><mods:affiliation>Laboratory of Environmental Toxicology (LETox), Centro Interdisciplinar de Investigaçao Marinha e Ambiental, Rua dos Bragas 289, 4050‐123 Porto, Portugal</mods:affiliation></affiliation></author><author><name sortKey="Rennert, Bernhard" sort="Rennert, Bernhard" uniqKey="Rennert B" first="Bernhard" last="Rennert">Bernhard Rennert</name><affiliation><mods:affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and 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ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Diets containing Microcystis with considerable amounts of the cyanotoxin microcystin‐LR (MC‐LR) were fed to determine their impact on the physiological performance of the omnivorous Nile tilapia (Oreochromis niloticus) with regard to stress and growth performance. Four different diets were prepared based on a commercial diet (control, MC‐5% [containing 5% dried Microcystis biomass], MC‐20% [containing 20% dried Microcystis biomass], and Arthrospira‐20% [containing 20% dried Arthrospira sp. biomass without toxin]) and fed to female Nile tilapia. Blood and tissue samples were taken after 1, 7, and 28 d, and MC‐LR was quantified in gills, muscle, and liver by using high‐performance liquid chromatography (HPLC). Only in the liver were moderate concentrations of MC‐LR detected. The stress hormone cortisol and glucose were analyzed from plasma, suggesting that all modified diets caused only minor to moderate stress, which was confirmed by analyses of hepatic glycogen. In addition, the effects of the different diets on growth performance were investigated by determining gene expression of hypophyseal growth hormone (GH) and hepatic insulin‐like growth factor‐I (IGF‐I). For all diets, quantitative reverse transcription‐polymerase chain reaction (RT‐qPCR) demonstrated no significant effect on gene expression of the major endocrine hormones of the growth axis, whereas classical growth data, including growth and feed conversion ratio, displayed slight inhibitory effects of all modified diets independent of their MC‐LR content. However, no significant change was found in condition or hepatosomatic index among the various diets, so it seems feasible that dried cyanobacterial biomass might be even used as a component in fish diet for Nile tilapia, which requires further research in more detail. Environ. Toxicol. Chem. 2010;29:561–568. © 2009 SETAC</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Andrea Ziková</name><affiliations><json:string>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</json:string><json:string>Centre for Cyanobacteria and Their Toxins (Institute of Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</json:string><json:string>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic.</json:string></affiliations></json:item><json:item><name>Achim Trubiroha</name><affiliations><json:string>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</json:string></affiliations></json:item><json:item><name>Claudia Wiegand</name><affiliations><json:string>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</json:string></affiliations></json:item><json:item><name>Sven Wuertz</name><affiliations><json:string>Laboratory of Environmental Toxicology (LETox), Centro Interdisciplinar de Investigaçao Marinha e Ambiental, Rua dos Bragas 289, 4050‐123 Porto, Portugal</json:string></affiliations></json:item><json:item><name>Bernhard Rennert</name><affiliations><json:string>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</json:string></affiliations></json:item><json:item><name>Stephan Pflugmacher</name><affiliations><json:string>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</json:string></affiliations></json:item><json:item><name>Radovan Kopp</name><affiliations><json:string>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</json:string><json:string>Centre for Cyanobacteria and Their Toxins (Institute of Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</json:string></affiliations></json:item><json:item><name>Jan Mareš</name><affiliations><json:string>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</json:string></affiliations></json:item><json:item><name>Werner Kloas</name><affiliations><json:string>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</json:string><json:string>Department of Endocrinology, Institute of Biology, Humboldt University, 10178 Berlin, Germany</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Microcystin‐LR</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Fish diet</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Tilapia</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Stress</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Growth</value></json:item></subject><articleId><json:string>ETC76</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Diets containing Microcystis with considerable amounts of the cyanotoxin microcystin‐LR (MC‐LR) were fed to determine their impact on the physiological performance of the omnivorous Nile tilapia (Oreochromis niloticus) with regard to stress and growth performance. Four different diets were prepared based on a commercial diet (control, MC‐5% [containing 5% dried Microcystis biomass], MC‐20% [containing 20% dried Microcystis biomass], and Arthrospira‐20% [containing 20% dried Arthrospira sp. biomass without toxin]) and fed to female Nile tilapia. Blood and tissue samples were taken after 1, 7, and 28 d, and MC‐LR was quantified in gills, muscle, and liver by using high‐performance liquid chromatography (HPLC). Only in the liver were moderate concentrations of MC‐LR detected. The stress hormone cortisol and glucose were analyzed from plasma, suggesting that all modified diets caused only minor to moderate stress, which was confirmed by analyses of hepatic glycogen. In addition, the effects of the different diets on growth performance were investigated by determining gene expression of hypophyseal growth hormone (GH) and hepatic insulin‐like growth factor‐I (IGF‐I). For all diets, quantitative reverse transcription‐polymerase chain reaction (RT‐qPCR) demonstrated no significant effect on gene expression of the major endocrine hormones of the growth axis, whereas classical growth data, including growth and feed conversion ratio, displayed slight inhibitory effects of all modified diets independent of their MC‐LR content. However, no significant change was found in condition or hepatosomatic index among the various diets, so it seems feasible that dried cyanobacterial biomass might be even used as a component in fish diet for Nile tilapia, which requires further research in more detail. Environ. Toxicol. 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Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</affiliation><affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic.</affiliation></author><author xml:id="author-2"><persName><forename type="first">Achim</forename><surname>Trubiroha</surname></persName><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation></author><author xml:id="author-3"><persName><forename type="first">Claudia</forename><surname>Wiegand</surname></persName><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation></author><author xml:id="author-4"><persName><forename type="first">Sven</forename><surname>Wuertz</surname></persName><affiliation>Laboratory of Environmental Toxicology (LETox), Centro Interdisciplinar de Investigaçao Marinha e Ambiental, Rua dos Bragas 289, 4050‐123 Porto, Portugal</affiliation></author><author xml:id="author-5"><persName><forename type="first">Bernhard</forename><surname>Rennert</surname></persName><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation></author><author xml:id="author-6"><persName><forename type="first">Stephan</forename><surname>Pflugmacher</surname></persName><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation></author><author xml:id="author-7"><persName><forename type="first">Radovan</forename><surname>Kopp</surname></persName><affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</affiliation><affiliation>Centre for 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level="j" type="abbrev">Environmental Toxicology and Chemistry</title><idno type="pISSN">0730-7268</idno><idno type="eISSN">1552-8618</idno><idno type="DOI">10.1002/(ISSN)1552-8618</idno><imprint><publisher>John Wiley & Sons, Inc.</publisher><pubPlace>Hoboken, USA</pubPlace><date type="published" when="2010-03"></date><biblScope unit="volume">29</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="561">561</biblScope><biblScope unit="page" to="568">568</biblScope></imprint></monogr><idno type="istex">F375A5F5FA9AD61FA71D2570DEF73979C0B3C77C</idno><idno type="DOI">10.1002/etc.76</idno><idno type="ArticleID">ETC76</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2010</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Diets containing Microcystis with considerable amounts of the cyanotoxin microcystin‐LR (MC‐LR) were fed to determine their impact on the physiological performance of the omnivorous Nile tilapia (Oreochromis niloticus) with regard to stress and growth performance. Four different diets were prepared based on a commercial diet (control, MC‐5% [containing 5% dried Microcystis biomass], MC‐20% [containing 20% dried Microcystis biomass], and Arthrospira‐20% [containing 20% dried Arthrospira sp. biomass without toxin]) and fed to female Nile tilapia. Blood and tissue samples were taken after 1, 7, and 28 d, and MC‐LR was quantified in gills, muscle, and liver by using high‐performance liquid chromatography (HPLC). Only in the liver were moderate concentrations of MC‐LR detected. The stress hormone cortisol and glucose were analyzed from plasma, suggesting that all modified diets caused only minor to moderate stress, which was confirmed by analyses of hepatic glycogen. In addition, the effects of the different diets on growth performance were investigated by determining gene expression of hypophyseal growth hormone (GH) and hepatic insulin‐like growth factor‐I (IGF‐I). For all diets, quantitative reverse transcription‐polymerase chain reaction (RT‐qPCR) demonstrated no significant effect on gene expression of the major endocrine hormones of the growth axis, whereas classical growth data, including growth and feed conversion ratio, displayed slight inhibitory effects of all modified diets independent of their MC‐LR content. However, no significant change was found in condition or hepatosomatic index among the various diets, so it seems feasible that dried cyanobacterial biomass might be even used as a component in fish diet for Nile tilapia, which requires further research in more detail. Environ. Toxicol. Chem. 2010;29:561–568. © 2009 SETAC</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>Microcystin‐LR</term></item><item><term>Fish diet</term></item><item><term>Tilapia</term></item><item><term>Stress</term></item><item><term>Growth</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>First International Workshop on Aquatic Toxicology and Biomonitoring</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2009-02-18">Received</change><change when="2009-08-10">Registration</change><change when="2010-03">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/F375A5F5FA9AD61FA71D2570DEF73979C0B3C77C/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>John Wiley & Sons, Inc.</publisherName><publisherLoc>Hoboken, USA</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1552-8618</doi><issn type="print">0730-7268</issn><issn type="electronic">1552-8618</issn><idGroup><id type="product" value="ETC"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY">Environmental Toxicology and Chemistry</title><title type="subtitle">An International Journal</title><title type="short">Environmental Toxicology and Chemistry</title></titleGroup></publicationMeta><publicationMeta level="part" position="30"><doi origin="wiley" registered="yes">10.1002/etc.v29:3</doi><numberingGroup><numbering type="journalVolume" number="29">29</numbering><numbering type="journalIssue">3</numbering></numberingGroup><coverDate startDate="2010-03">March 2010</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="120" status="forIssue"><doi origin="wiley" registered="yes">10.1002/etc.76</doi><idGroup><id type="unit" value="ETC76"></id></idGroup><countGroup><count type="pageTotal" number="8"></count></countGroup><titleGroup><title type="articleCategory">First International Workshop on Aquatic Toxicology and Biomonitoring</title><title type="tocHeading1">First International Workshop on Aquatic Toxicology and Biomonitoring</title></titleGroup><copyright ownership="thirdParty">Copyright © 2009 SETAC</copyright><eventGroup><event type="manuscriptReceived" date="2009-02-18"></event><event type="manuscriptRevised" date="2009-03-23"></event><event type="manuscriptAccepted" date="2009-08-10"></event><event type="publishedOnlineAccepted" date="2009-12-10"></event><event type="publishedOnlineEarlyUnpaginated" date="2009-12-30"></event><event type="firstOnline" date="2009-12-10"></event><event type="publishedOnlineFinalForm" date="2010-02-17"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText mathml2tex" date="2010-03-04"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-25"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-17"></event></eventGroup><numberingGroup><numbering type="pageFirst">561</numbering><numbering type="pageLast">568</numbering></numberingGroup><correspondenceTo>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic.</correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:ETC.ETC76.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="3"></count><count type="tableTotal" number="2"></count><count type="referenceTotal" number="43"></count><count type="wordTotal" number="6658"></count></countGroup><titleGroup><title type="main" xml:lang="en">Impact of microcystin containing diets on physiological performance of Nile tilapia (<i>Oreochromis niloticus</i>) concerning stress and growth<link href="#fn1"></link></title><title type="short" xml:lang="en">Impact of microcystin‐containing diets on Nile tilapia</title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#af1 #af2" corresponding="yes"><personName><givenNames>Andrea</givenNames><familyName>Ziková</familyName></personName><contactDetails><email>andrea.zikova@seznam.cz</email></contactDetails></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#af3"><personName><givenNames>Achim</givenNames><familyName>Trubiroha</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#af3"><personName><givenNames>Claudia</givenNames><familyName>Wiegand</familyName></personName></creator><creator xml:id="au4" creatorRole="author" affiliationRef="#af4"><personName><givenNames>Sven</givenNames><familyName>Wuertz</familyName></personName></creator><creator xml:id="au5" creatorRole="author" affiliationRef="#af3"><personName><givenNames>Bernhard</givenNames><familyName>Rennert</familyName></personName></creator><creator xml:id="au6" creatorRole="author" affiliationRef="#af3"><personName><givenNames>Stephan</givenNames><familyName>Pflugmacher</familyName></personName></creator><creator xml:id="au7" creatorRole="author" affiliationRef="#af1 #af2"><personName><givenNames>Radovan</givenNames><familyName>Kopp</familyName></personName></creator><creator xml:id="au8" creatorRole="author" affiliationRef="#af1"><personName><givenNames>Jan</givenNames><familyName>Mareš</familyName></personName></creator><creator xml:id="au9" creatorRole="author" affiliationRef="#af3 #af5"><personName><givenNames>Werner</givenNames><familyName>Kloas</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="CZ" type="organization"><unparsedAffiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="CZ" type="organization"><unparsedAffiliation>Centre for Cyanobacteria and Their Toxins (Institute of Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</unparsedAffiliation></affiliation><affiliation xml:id="af3" countryCode="DE" type="organization"><unparsedAffiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</unparsedAffiliation></affiliation><affiliation xml:id="af4" countryCode="PT" type="organization"><unparsedAffiliation>Laboratory of Environmental Toxicology (LETox), Centro Interdisciplinar de Investigaçao Marinha e Ambiental, Rua dos Bragas 289, 4050‐123 Porto, Portugal</unparsedAffiliation></affiliation><affiliation xml:id="af5" countryCode="DE" type="organization"><unparsedAffiliation>Department of Endocrinology, Institute of Biology, Humboldt University, 10178 Berlin, Germany</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">Microcystin‐LR</keyword><keyword xml:id="kwd2">Fish diet</keyword><keyword xml:id="kwd3">Tilapia</keyword><keyword xml:id="kwd4">Stress</keyword><keyword xml:id="kwd5">Growth</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Diets containing <i>Microcystis</i> with considerable amounts of the cyanotoxin microcystin‐LR (MC‐LR) were fed to determine their impact on the physiological performance of the omnivorous Nile tilapia (<i>Oreochromis niloticus</i>) with regard to stress and growth performance. Four different diets were prepared based on a commercial diet (control, MC‐5% [containing 5% dried <i>Microcystis</i> biomass], MC‐20% [containing 20% dried <i>Microcystis</i> biomass], and Arthrospira‐20% [containing 20% dried <i>Arthrospira</i> sp. biomass without toxin]) and fed to female Nile tilapia. Blood and tissue samples were taken after 1, 7, and 28 d, and MC‐LR was quantified in gills, muscle, and liver by using high‐performance liquid chromatography (HPLC). Only in the liver were moderate concentrations of MC‐LR detected. The stress hormone cortisol and glucose were analyzed from plasma, suggesting that all modified diets caused only minor to moderate stress, which was confirmed by analyses of hepatic glycogen. In addition, the effects of the different diets on growth performance were investigated by determining gene expression of hypophyseal growth hormone (GH) and hepatic insulin‐like growth factor‐I (IGF‐I). For all diets, quantitative reverse transcription‐polymerase chain reaction (RT‐qPCR) demonstrated no significant effect on gene expression of the major endocrine hormones of the growth axis, whereas classical growth data, including growth and feed conversion ratio, displayed slight inhibitory effects of all modified diets independent of their MC‐LR content. However, no significant change was found in condition or hepatosomatic index among the various diets, so it seems feasible that dried cyanobacterial biomass might be even used as a component in fish diet for Nile tilapia, which requires further research in more detail. Environ. Toxicol. Chem. 2010;29:561–568. © 2009 SETAC</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="fn1"><p>Presented at the 1st International Workshop on Aquatic Toxicology and Biomonitoring, Vodnany, Czech Republic, August 27–29, 2008.</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning stress and growth</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Impact of microcystin‐containing diets on Nile tilapia</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning stress and growth</title></titleInfo><name type="personal"><namePart type="given">Andrea</namePart><namePart type="family">Ziková</namePart><affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</affiliation><affiliation>Centre for Cyanobacteria and Their Toxins (Institute of Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</affiliation><affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Achim</namePart><namePart type="family">Trubiroha</namePart><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Claudia</namePart><namePart type="family">Wiegand</namePart><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Sven</namePart><namePart type="family">Wuertz</namePart><affiliation>Laboratory of Environmental Toxicology (LETox), Centro Interdisciplinar de Investigaçao Marinha e Ambiental, Rua dos Bragas 289, 4050‐123 Porto, Portugal</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Bernhard</namePart><namePart type="family">Rennert</namePart><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Stephan</namePart><namePart type="family">Pflugmacher</namePart><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Radovan</namePart><namePart type="family">Kopp</namePart><affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</affiliation><affiliation>Centre for Cyanobacteria and Their Toxins (Institute of Botany, Czech Academy of Sciences and RECETOX, Masaryk University), Kamenice 126/3, 625 00 Brno, Czech Republic</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jan</namePart><namePart type="family">Mareš</namePart><affiliation>Department of Fisheries and Hydrobiology, Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Werner</namePart><namePart type="family">Kloas</namePart><affiliation>Department of Aquaculture and Ecophysiology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany</affiliation><affiliation>Department of Endocrinology, Institute of Biology, Humboldt University, 10178 Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>John Wiley & Sons, Inc.</publisher><place><placeTerm type="text">Hoboken, USA</placeTerm></place><dateIssued encoding="w3cdtf">2010-03</dateIssued><dateCaptured encoding="w3cdtf">2009-02-18</dateCaptured><dateValid encoding="w3cdtf">2009-08-10</dateValid><copyrightDate encoding="w3cdtf">2010</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">3</extent><extent unit="tables">2</extent><extent unit="references">43</extent><extent unit="words">6658</extent></physicalDescription><abstract lang="en">Diets containing Microcystis with considerable amounts of the cyanotoxin microcystin‐LR (MC‐LR) were fed to determine their impact on the physiological performance of the omnivorous Nile tilapia (Oreochromis niloticus) with regard to stress and growth performance. Four different diets were prepared based on a commercial diet (control, MC‐5% [containing 5% dried Microcystis biomass], MC‐20% [containing 20% dried Microcystis biomass], and Arthrospira‐20% [containing 20% dried Arthrospira sp. biomass without toxin]) and fed to female Nile tilapia. Blood and tissue samples were taken after 1, 7, and 28 d, and MC‐LR was quantified in gills, muscle, and liver by using high‐performance liquid chromatography (HPLC). Only in the liver were moderate concentrations of MC‐LR detected. The stress hormone cortisol and glucose were analyzed from plasma, suggesting that all modified diets caused only minor to moderate stress, which was confirmed by analyses of hepatic glycogen. In addition, the effects of the different diets on growth performance were investigated by determining gene expression of hypophyseal growth hormone (GH) and hepatic insulin‐like growth factor‐I (IGF‐I). For all diets, quantitative reverse transcription‐polymerase chain reaction (RT‐qPCR) demonstrated no significant effect on gene expression of the major endocrine hormones of the growth axis, whereas classical growth data, including growth and feed conversion ratio, displayed slight inhibitory effects of all modified diets independent of their MC‐LR content. However, no significant change was found in condition or hepatosomatic index among the various diets, so it seems feasible that dried cyanobacterial biomass might be even used as a component in fish diet for Nile tilapia, which requires further research in more detail. Environ. Toxicol. Chem. 2010;29:561–568. © 2009 SETAC</abstract><note type="content">*Presented at the 1st International Workshop on Aquatic Toxicology and Biomonitoring, Vodnany, Czech Republic, August 27–29, 2008.</note><subject lang="en"><genre>keywords</genre><topic>Microcystin‐LR</topic><topic>Fish diet</topic><topic>Tilapia</topic><topic>Stress</topic><topic>Growth</topic></subject><relatedItem type="host"><titleInfo><title>Environmental Toxicology and Chemistry</title><subTitle>An International Journal</subTitle></titleInfo><titleInfo type="abbreviated"><title>Environmental Toxicology and Chemistry</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>First International Workshop on Aquatic Toxicology and Biomonitoring</topic></subject><identifier type="ISSN">0730-7268</identifier><identifier type="eISSN">1552-8618</identifier><identifier type="DOI">10.1002/(ISSN)1552-8618</identifier><identifier type="PublisherID">ETC</identifier><part><date>2010</date><detail type="volume"><caption>vol.</caption><number>29</number></detail><detail type="issue"><caption>no.</caption><number>3</number></detail><extent unit="pages"><start>561</start><end>568</end><total>8</total></extent></part></relatedItem><identifier type="istex">F375A5F5FA9AD61FA71D2570DEF73979C0B3C77C</identifier><identifier type="DOI">10.1002/etc.76</identifier><identifier type="ArticleID">ETC76</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2009 SETAC</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Inc.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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