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| Titel |
Effects of increased pCO2 and temperature on trace element (Ag, Cd and Zn) bioaccumulation in the eggs of the common cuttlefish, Sepia officinalis |
| VerfasserIn |
T. Lacoue-Labarthe, S. Martin, F. Oberhänsli, J.-L. Teyssié, S. Markich, R. Jeffree, P. Bustamante |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 11 ; Nr. 6, no. 11 (2009-11-16), S.2561-2573 |
| Datensatznummer |
250004092
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| Publikation (Nr.) |
 copernicus.org/bg-6-2561-2009.pdf |
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| Zusammenfassung |
| Cephalopods play a key role in many marine trophic networks and constitute
alternative fisheries resources, especially given the ongoing decline in
finfish stocks. Along the European coast, the eggs of the cuttlefish Sepia officinalis are
characterized by an increasing permeability of the eggshell during
development, which leads to selective accumulation of essential and
non-essential elements in the embryo. Temperature and pH are two critical
factors that affect the metabolism of marine organisms in the coastal
shallow waters. In this study, we investigated the effects of pH and
temperature through a crossed (3×2; pH 8.1 (pCO2, 400 ppm), 7.85
(900 ppm) and 7.6 (1400 ppm) at 16 and 19°C, respectively) laboratory
experiment. Seawater pH showed a strong effect on the egg weight and
non-significant impact on the weight of hatchlings at the end of development
implying an egg swelling process and embryo growth disturbances. The lower
the seawater pH, the more 110 mAg was accumulated in the tissues of
hatchlings. The 109Cd concentration factor (CF) decreased with
decreasing pH and 65Zn CF reached maximal values pH 7.85, independently
of temperature. Our results suggest that pH and temperature affected both
the permeability properties of the eggshell and embryonic metabolism. To the
best of our knowledge, this is one of the first studies on the consequences
of ocean acidification and ocean warming on metal uptake in marine
organisms, and our results indicate the need to further evaluate the likely
ecotoxicological impact of the global change on the early-life stages of the
cuttlefish. |
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