Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning stress and growth
Identifieur interne : 000450 ( Main/Exploration ); précédent : 000449; suivant : 000451Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning stress and growth
Auteurs : Andrea Ziková [République tchèque] ; Achim Trubiroha [Allemagne] ; Claudia Wiegand [Allemagne] ; Sven Wuertz [Portugal] ; Bernhard Rennert [Allemagne] ; Stephan Pflugmacher [Allemagne] ; Radovan Kopp [République tchèque] ; Jan Mareš [République tchèque] ; Werner Kloas [Allemagne]Source :
- 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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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><affiliations><list><country><li>Allemagne</li><li>Portugal</li><li>République tchèque</li></country><region><li>Berlin</li></region><settlement><li>Berlin</li></settlement></list><tree><country name="République tchèque"><noRegion><name sortKey="Zikova, Andrea" sort="Zikova, Andrea" uniqKey="Zikova A" first="Andrea" last="Ziková">Andrea Ziková</name></noRegion><name sortKey="Kopp, Radovan" sort="Kopp, Radovan" uniqKey="Kopp R" first="Radovan" last="Kopp">Radovan Kopp</name><name sortKey="Kopp, Radovan" sort="Kopp, Radovan" uniqKey="Kopp R" first="Radovan" last="Kopp">Radovan Kopp</name><name sortKey="Mares, Jan" sort="Mares, Jan" uniqKey="Mares J" first="Jan" last="Mareš">Jan Mareš</name><name sortKey="Zikova, Andrea" sort="Zikova, Andrea" uniqKey="Zikova A" first="Andrea" last="Ziková">Andrea Ziková</name></country><country name="Allemagne"><region name="Berlin"><name sortKey="Trubiroha, Achim" sort="Trubiroha, Achim" uniqKey="Trubiroha A" first="Achim" last="Trubiroha">Achim Trubiroha</name></region><name sortKey="Kloas, Werner" sort="Kloas, Werner" uniqKey="Kloas W" first="Werner" last="Kloas">Werner Kloas</name><name sortKey="Kloas, Werner" sort="Kloas, Werner" uniqKey="Kloas W" first="Werner" last="Kloas">Werner Kloas</name><name sortKey="Pflugmacher, Stephan" sort="Pflugmacher, Stephan" uniqKey="Pflugmacher S" first="Stephan" last="Pflugmacher">Stephan Pflugmacher</name><name sortKey="Rennert, Bernhard" sort="Rennert, Bernhard" uniqKey="Rennert B" first="Bernhard" last="Rennert">Bernhard Rennert</name><name sortKey="Wiegand, Claudia" sort="Wiegand, Claudia" uniqKey="Wiegand C" first="Claudia" last="Wiegand">Claudia Wiegand</name></country><country name="Portugal"><noRegion><name sortKey="Wuertz, Sven" sort="Wuertz, Sven" uniqKey="Wuertz S" first="Sven" last="Wuertz">Sven Wuertz</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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