Effects of ocean acidification in relation to diel cycles of seawater pCO2 on early development of Ezo abalone Haliotis dicus hannai ...

• Main Authors: Takami, Hideki, Onitsuika, Toshihiro, Kimura, Ryo, Ono, Tsuneo, Nojiri, Yukihiro
• Format: Conference Object
• Language: unknown
• Published: ASC 2015 - Theme session H 2024
• Subjects: Ecosystem observation, processes and dynamics; Ocean acidification
• Online Access: https://dx.doi.org/10.17895/ices.pub.25682367.v1; https://ices-library.figshare.com/articles/conference_contribution/Effects_of_ocean_acidification_in_relation_to_diel_cycles_of_seawater_pCO2_on_early_development_of_Ezo_abalone_Haliotis_dicus_hannai/25682367/1

No abstracts are to be cited without prior reference to the author.We investigated the effects of ocean acidification in relation to diel cycles of seawaterpCO 2 levels onthe early development of ezo abalone Haliotis discus hannai in the laboratory. Shell length, mortalityand malformation of larval abalone were examined under different pCO 2 levels with mimicked dielcycle using a CO CO2 manipulation system . Adult abalone were induced to spawn and gametes wereartificially fertil ized in concentrations of 4 400, 800 or 1200 pCO 2 µatm. Sixteen hours post post-fertilization,hatched larvae were exposed to running seawater adjusted to a constant level (400, 800 or 1200 µatmpCO 2) or fluctuating on a diel cycle (400 -1200 or 800 -1600 µatm pCO 2) pCO 2 in 75 h experimentalperiods. There were no significant differences in the mortality rate, malformation rate and shell lengthof larvae among the 400, 800, and 400-1200 µatm pCO 2 treatments. In contrast, the malformation rate was significantly higher in the 1200 and ...