Adverse health effects and histological changes in white sturgeon (Acipenser transmontanus) exposed to dietary selenomethionine.
Identifieur interne : 000100 ( Main/Exploration ); précédent : 000099; suivant : 000101Adverse health effects and histological changes in white sturgeon (Acipenser transmontanus) exposed to dietary selenomethionine.
Auteurs : Jenna Zee [Canada] ; Sarah Patterson [Canada] ; Danielle Gagnon [Canada] ; Markus Hecker [Canada]Source :
- Environmental toxicology and chemistry [ 1552-8618 ] ; 2016.
Abstract
It has been shown that selenium (Se) released to the aquatic environment can have devastating effects on local wildlife. White sturgeon (Acipenser transmontanus) have a life history particularly susceptible to contaminants, and their protection is of interest as they are culturally and economically important, and many populations are classified as endangered. During the present 72-d dietary study, multiple signs of decreased health and Se lethality were observed. Juvenile white sturgeon were given diets containing 1.4 μg, 5.6 μg, 22.4 μg, or 104.4 μg selenomethionine/g food (dry mass). Selenium accumulated in muscle and liver tissue in a dose-dependent manner. Edema causing exophthalmos developed within 15 d and 23 d, and lethal effects occurred in 54% and 22% of fish in the high- and medium-dose groups, respectively. Growth and hepatosomatic index were significantly lower in the high-dose group, which also had a high incidence of food avoidance. Histology of the liver revealed a dose-dependent increase in melanomacrophage aggregates and decrease of energy stores, which indicated toxicity. These results indicate that white sturgeon are susceptible to the effects of Se accumulation over relatively short time periods. This stresses the need for continued sturgeon research and studies looking into the environmental fate and regulation of released Se. Environ Toxicol Chem 2016;35:1741-1750. © 2015 SETAC.
DOI: 10.1002/etc.3320
PubMed: 26632643
Affiliations:
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xml:lang="fr">Canada</country><wicri:regionArea>Toxicology Centre, University of Saskatchewan, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author><author><name sortKey="Gagnon, Danielle" sort="Gagnon, Danielle" uniqKey="Gagnon D" first="Danielle" last="Gagnon">Danielle Gagnon</name><affiliation wicri:level="1"><nlm:affiliation>Toxicology Program, University of Saskatchewan, Saskatchewan, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Toxicology Program, University of Saskatchewan, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author><author><name sortKey="Hecker, Markus" sort="Hecker, Markus" uniqKey="Hecker M" first="Markus" last="Hecker">Markus Hecker</name><affiliation wicri:level="1"><nlm:affiliation>School of Environment and Sustainability, University of Saskatchewan, Saskatchewan, Canada.</nlm:affiliation><country 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last="Patterson">Sarah Patterson</name><affiliation wicri:level="1"><nlm:affiliation>Toxicology Centre, University of Saskatchewan, Saskatchewan, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Toxicology Centre, University of Saskatchewan, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author><author><name sortKey="Gagnon, Danielle" sort="Gagnon, Danielle" uniqKey="Gagnon D" first="Danielle" last="Gagnon">Danielle Gagnon</name><affiliation wicri:level="1"><nlm:affiliation>Toxicology Program, University of Saskatchewan, Saskatchewan, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Toxicology Program, University of Saskatchewan, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author><author><name sortKey="Hecker, Markus" sort="Hecker, Markus" uniqKey="Hecker M" first="Markus" last="Hecker">Markus Hecker</name><affiliation wicri:level="1"><nlm:affiliation>School of Environment and Sustainability, University of Saskatchewan, Saskatchewan, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>School of Environment and Sustainability, University of Saskatchewan, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author></analytic><series><title level="j">Environmental toxicology and chemistry</title><idno type="eISSN">1552-8618</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">It has been shown that selenium (Se) released to the aquatic environment can have devastating effects on local wildlife. White sturgeon (Acipenser transmontanus) have a life history particularly susceptible to contaminants, and their protection is of interest as they are culturally and economically important, and many populations are classified as endangered. During the present 72-d dietary study, multiple signs of decreased health and Se lethality were observed. Juvenile white sturgeon were given diets containing 1.4 μg, 5.6 μg, 22.4 μg, or 104.4 μg selenomethionine/g food (dry mass). Selenium accumulated in muscle and liver tissue in a dose-dependent manner. Edema causing exophthalmos developed within 15 d and 23 d, and lethal effects occurred in 54% and 22% of fish in the high- and medium-dose groups, respectively. Growth and hepatosomatic index were significantly lower in the high-dose group, which also had a high incidence of food avoidance. Histology of the liver revealed a dose-dependent increase in melanomacrophage aggregates and decrease of energy stores, which indicated toxicity. These results indicate that white sturgeon are susceptible to the effects of Se accumulation over relatively short time periods. This stresses the need for continued sturgeon research and studies looking into the environmental fate and regulation of released Se. Environ Toxicol Chem 2016;35:1741-1750. © 2015 SETAC.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Zee, Jenna" sort="Zee, Jenna" uniqKey="Zee J" first="Jenna" last="Zee">Jenna Zee</name></noRegion><name sortKey="Gagnon, Danielle" sort="Gagnon, Danielle" uniqKey="Gagnon D" first="Danielle" last="Gagnon">Danielle Gagnon</name><name sortKey="Hecker, Markus" sort="Hecker, Markus" uniqKey="Hecker M" first="Markus" last="Hecker">Markus Hecker</name><name sortKey="Patterson, Sarah" sort="Patterson, Sarah" uniqKey="Patterson S" first="Sarah" last="Patterson">Sarah Patterson</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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