Abstract
BackgroundOcean acidification may affect fish mineralized structures (i.e. otoliths and skeleton). MethodsHere, we compared the elemental composition of muscle and skeleton and the mineral features of skeleton in the site-attached fish Gobius bucchichi naturally exposed to high pCO2/low pH conditions in a shallow CO2 vent with fish of the same species exposed to normal pH. ResultsOverall, no skeleton malformations were found in both pH conditions, but among-site differences were found in the elemental composition. Interestingly, higher Ca/P values, inducing a moderate skeleton maturation, were found in fish exposed to acidified conditions than in controls. ConclusionOur findings suggest that ocean acidification may play a significant role in physiological processes related to mineralization, fostering skeleton pre-aging.
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