Effects of CO2-driven ocean acidification on early life stages of marine medaka (Oryzias melastigma)

The potential effects of elevated CO2 level and reduced carbonate saturation state in marine environment on fishes and other non-calcified organisms are still poorly known. In present study, we investigated the effects of ocean acidification on embryogenesis and organogenesis of newly hatched larvae...

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Bibliographic Details
Main Authors: Mu, J, Jin, F, Wang, J Y, Zheng, N, Cong, Y
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
Alkalinity
total
Animalia
Aragonite saturation state
standard deviation
Behaviour
Bicarbonate ion
Bottles or small containers/Aquaria (<20 L)
Calcite saturation state
Calculated using CO2SYS
Calculated using seacarb after Nisumaa et al. (2010)
Carbon
inorganic
dissolved
Carbonate ion
Carbonate system computation flag
Carbon dioxide
Chordata
Coulometric titration
Development
Figure
Fugacity of carbon dioxide (water) at sea surface temperature (wet air)
Growth/Morphology
Hatching rate
Hatching time
Heart rate
Laboratory experiment
Laboratory strains
Larval deformity rate
Mortality/Survival
Nekton
Ocean acidification
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.848420
https://doi.org/10.1594/PANGAEA.848420
Description
Summary:The potential effects of elevated CO2 level and reduced carbonate saturation state in marine environment on fishes and other non-calcified organisms are still poorly known. In present study, we investigated the effects of ocean acidification on embryogenesis and organogenesis of newly hatched larvae of marine medaka (Oryzias melastigma) after 21 d exposure of eggs to different artificially acidified seawater (pH 7.6 and 7.2, respectively), and compared with those in control group (pH 8.2). Results showed that CO2-driven seawater acidification (pH 7.6 and 7.2) had no detectable effect on hatching time, hatching rate, and heart rate of embryos. However, the deformity rate of larvae in pH 7.2 treatment was significantly higher than that in control treatment. The left and right sagitta areas did not differ significantly from each other in each treatment. However, the mean sagitta area of larvae in pH 7.6 treatment was significantly smaller than that in the control (p = 0.024). These results suggest that although marine medaka might be more tolerant of elevated CO2 than some other fishes, the effect of elevated CO2 level on the calcification of otolith is likely to be the most susceptibly physiological process of pH regulation in early life stage of marine medaka.

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