Detrimental effects of reduced seawater pH on the early development of the Pacific abalone

Jiaqi Li, Zengjie Jiang, Jihong Zhang, Jianwen QIU, Meirong Du, Dapeng Bian, Jianguang Fang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

19 Citations (Scopus)


The hatching process of the Pacific abalone Haliotis discus hannai was prolonged at a pH of 7.6 and pH 7.3, and the embryonic developmental success was reduced. The hatching rate at pH 7.3 was significantly (10.8%) lower than that of the control (pH 8.2). The malformation rates at pH 7.9 and pH 8.2 were less than 20% but were 53.8% and 77.3% at pH 7.6 and pH 7.3, respectively. When newly hatched larvae were incubated for 48. h at pH 7.3, only 2.7% of the larvae settled, while more than 70% of the larvae completed settlement in the other three pH treatments. However, most 24. h old larvae could complete metamorphosis in all four pH treatments. Overall, a 0.3-unit reduction in water pH will produce no negative effect on the early development of the Pacific abalone, but further reduction in pH to the values predicted for seawater by the end of this century will have strong detrimental effects.

Original languageEnglish
Pages (from-to)320-324
Number of pages5
JournalMarine Pollution Bulletin
Issue number1
Publication statusPublished - 15 Sept 2013

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Malformation
  • Metamorphosis
  • Ocean acidification
  • Pacific abalone


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