Publication Date:
2024-03-15
Description:
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.
Keywords:
Alkalinity, total; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Behaviour; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Chordata; Coulometric titration; Development; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Hatching rate; Hatching rate, standard deviation; Hatching time; Hatching time, standard deviation; Heart rate; Heart rate, standard deviation; Laboratory experiment; Laboratory strains; Larval deformity rate; Larval deformity rate, standard deviation; Mortality/Survival; Nekton; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Oryzias melastigma; Otolith area; Otolith area, standard deviation; Oxygen; Oxygen, standard deviation; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Potentiometric; Reproduction; Salinity; Salinity, standard deviation; Single species; Species; Survival; Survival rate, standard deviation; Temperature, water; Temperature, water, standard deviation; Treatment
Type:
Dataset
Format:
text/tab-separated-values, 345 data points
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