The relation between concentrations of ovarian trace elements and the body size of Atlantic cod Gadus morhua
Identifieur interne : 000534 ( Main/Exploration ); précédent : 000533; suivant : 000535The relation between concentrations of ovarian trace elements and the body size of Atlantic cod Gadus morhua
Auteurs : A. Bang [Danemark] ; P. Grnkjr [Danemark] ; B. Lorenzen [Danemark]Source :
- ICES Journal of Marine Science [ 1054-3139 ] ; 2008-10.
Abstract
Bang, A., Grnkjr, P., and Lorenzen, B. 2008. The relation between concentrations of ovarian trace elements and the body size of Atlantic cod Gadus morhua. ICES Journal of Marine Science, 65: 11911197. Trace metals in the ovaries of fish are transferred from the female via the yolk to the offspring, which makes the early life stages susceptible to deleterious effects of potentially toxic elements contained in the ovaries. Here, the concentrations of 13 elements from the ovaries of 133 ripe female North Sea cod Gadus morhua weighing 0.218 kg were correlated with female size, accounting for differences in maturity and condition. Most elements were negatively correlated with the size variables weight, length and, especially, ovarian dry weight. Further, they were negatively correlated with maturity and condition. Many of the trace elements showed true size-dependence, but the correlations were generally weak. A linear discriminant analysis separated small and large fish at a length of 85 cm based on concentrations of Co, Mn, Se, and Zn, and correctly assigned 78 of 102 small fish and 23 of 31 large fish to their respective size category. This corresponds to an overall classification success of 75.9. The results suggest that embryos and early larvae from small females are exposed to higher levels of potentially harmful metals. If the differences in trace element concentration influence survival success, this will add to the negative effects of size distribution truncation and declines in size-at-maturity experienced by many populations of cod.
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DOI: 10.1093/icesjms/fsn094
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Bang</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Marine Ecology, Department of Biological Sciences, University of Aarhus, Finlandsgade 14, 8200 Aarhus N</wicri:regionArea><wicri:noRegion>8200 Aarhus N</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Danemark</country></affiliation></author><author><name sortKey="Grnkjr, P" sort="Grnkjr, P" uniqKey="Grnkjr P" first="P." last="Grnkjr">P. Grnkjr</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Marine Ecology, Department of Biological Sciences, University of Aarhus, Finlandsgade 14, 8200 Aarhus N</wicri:regionArea><wicri:noRegion>8200 Aarhus N</wicri:noRegion></affiliation></author><author><name sortKey="Lorenzen, B" sort="Lorenzen, B" uniqKey="Lorenzen B" first="B." last="Lorenzen">B. Lorenzen</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Plant Biology, Department of Biological Sciences, University of Aarhus, Ole Worms All 1135, 8000 Aarhus C</wicri:regionArea><wicri:noRegion>8000 Aarhus C</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">ICES Journal of Marine Science</title><idno type="ISSN">1054-3139</idno><idno type="eISSN">1095-9289</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2008-10">2008-10</date><biblScope unit="volume">65</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page" from="1191">1191</biblScope><biblScope unit="page" to="1197">1197</biblScope></imprint><idno type="ISSN">1054-3139</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1054-3139</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">Bang, A., Grnkjr, P., and Lorenzen, B. 2008. The relation between concentrations of ovarian trace elements and the body size of Atlantic cod Gadus morhua. ICES Journal of Marine Science, 65: 11911197. Trace metals in the ovaries of fish are transferred from the female via the yolk to the offspring, which makes the early life stages susceptible to deleterious effects of potentially toxic elements contained in the ovaries. Here, the concentrations of 13 elements from the ovaries of 133 ripe female North Sea cod Gadus morhua weighing 0.218 kg were correlated with female size, accounting for differences in maturity and condition. Most elements were negatively correlated with the size variables weight, length and, especially, ovarian dry weight. Further, they were negatively correlated with maturity and condition. Many of the trace elements showed true size-dependence, but the correlations were generally weak. A linear discriminant analysis separated small and large fish at a length of 85 cm based on concentrations of Co, Mn, Se, and Zn, and correctly assigned 78 of 102 small fish and 23 of 31 large fish to their respective size category. This corresponds to an overall classification success of 75.9. The results suggest that embryos and early larvae from small females are exposed to higher levels of potentially harmful metals. If the differences in trace element concentration influence survival success, this will add to the negative effects of size distribution truncation and declines in size-at-maturity experienced by many populations of cod.</div></front></TEI><affiliations><list><country><li>Danemark</li></country></list><tree><country name="Danemark"><noRegion><name sortKey="Bang, A" sort="Bang, A" uniqKey="Bang A" first="A." last="Bang">A. Bang</name></noRegion><name sortKey="Bang, A" sort="Bang, A" uniqKey="Bang A" first="A." last="Bang">A. Bang</name><name sortKey="Grnkjr, P" sort="Grnkjr, P" uniqKey="Grnkjr P" first="P." last="Grnkjr">P. Grnkjr</name><name sortKey="Lorenzen, B" sort="Lorenzen, B" uniqKey="Lorenzen B" first="B." last="Lorenzen">B. Lorenzen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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