Hypoxia induces abnormal larval development and affects biofilm-larval interaction in the serpulid polychaete Hydroides elegans

P. K.S. Shin, J. Y.S. Leung, Jianwen QIU, P. O. Ang, Man Ying CHIU, V. Thiyagarajan, S. G. Cheung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Hydroides elegans, a worldwide fouling polychaete, can spawn throughout the year, but its recruitment drops during summer when hypoxia prevails. Here, the influence of hypoxia on larval development and settlement of H. elegans was investigated. Results showed that larval development was compromised at 1mg O2 l-1 with a lower proportion of competent larvae and a higher proportion of malformed larvae, probably due to reduction in clearance rate. Regarding larval settlement, although most of the larvae were reluctant to settle at 1mg O2 l-1, regardless of the biofilm nature, they settled quickly within 24h in response to the resumption of dissolved oxygen. Furthermore, only about 5% of the larvae settled on the biofilms developed under hypoxia, regardless of dissolved oxygen levels of the seawater. The delayed larval development and potential alteration of biofilm nature owing to hypoxia explained why the recruitment of H. elegans declines during summer.

Original languageEnglish
Pages (from-to)291-297
Number of pages7
JournalMarine Pollution Bulletin
Volume76
Issue number1-2
DOIs
Publication statusPublished - 2013

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Biofilm
  • Hydroides elegans
  • Hypoxia
  • Larval development
  • Larval settlement

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