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| Titel |
Effects of CO2-driven ocean acidification on early life stages of marine medaka (Oryzias melastigma) |
| VerfasserIn |
J. Mu, F. Jin, J. Wang, N. Zheng, Y. Cong |
| 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 ; 12, no. 12 ; Nr. 12, no. 12 (2015-06-25), S.3861-3868 |
| Datensatznummer |
250117999
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| Publikation (Nr.) |
 copernicus.org/bg-12-3861-2015.pdf |
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| Zusammenfassung |
| The potential effects of high CO2 and associated ocean acidification
(OA) in marine fishes and other non-calcified organisms are less well
understood. In this study, we investigated the responses of early life stages
(ELS) of marine medaka (Oryzias melastigma) exposed to a series of
experimental manipulation of CO2 levels. Results showed that
CO2-driven seawater acidification (pH 7.6 and pH 7.2) had no
detectable effect on hatching time, hatching rate, or heart rate of embryos.
However, the deformity rate of larvae in the pH 7.2 treatment was
significantly higher than that in the control treatment. There is no
significant difference between the left and right otolith areas in each
treatment. However, the average otolith area of larvae in the pH 7.6
treatment was significantly smaller than that in the control. Such
alterations in the developmental abnormalities and otolith size of marine
medaka larvae due to elevated-CO2 levels suggests that this species will
be increasingly challenged by future OA. Further studies of the impacts of OA
on marine fish to assess whether or not the environmental influence in one
generation can affect the later life history and the phenotype of subsequent
generations are needed. |
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