The Effects of Elevated Carbon Dioxide in Seawater on the Early Life Stages of Black Sea Bream Acanthopagrus schlegelii

摘要

Since the industrial revolution, seawater has increased in temperature and acidity due to the increase in anthropogenic carbon dioxide in the atmosphere. To understand the effect of elevated C02 on the early life stages of fish, we reared fertilized eggs of black sea bream Acanthopagrus schlegeliiunder three C0_2 concentrations (400,850 and 1550 ppm) for 3 weeks. The standard length and wet weight of black sea bream larvae declined with enhanced C0_2 concentration in the rearing water (P<0.05). However, chemical analysis using ICP-OES on internal tissues of black sea bream larvae indicated that the whole-body calcium concentration increased with C0_2 concentration in the rearing water. These conflicting results suggest that future experiments shouldexamine the acid-base balance to investigate the formation of bone and otolith during larval growth.