Effect of parental hypoxic exposure on embryonic development of the offspring of two serpulid polychaetes: Implication for transgenerational epigenetic effect

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Sperm production and motility, fecundity, and egg size, complexity and viability of serpulid polychaetes Hydroides elegans and Hydroides diramphus after 2-week treatment to hypoxia (2mg O2l-1) was compared with those under normoxia (6mg O2l-1). Despite reduced fecundity, the effect of parental hypoxic exposure on gamete quality was not discernible for both species. However, regardless of their subsequent dissolved oxygen environment, eggs spawned by H. elegans after hypoxic exposure were found to have lower fertilization success, slower embryonic development and a significantly higher yield of malformed embryos than those with a parental normoxic treatment. In contrast, neither fertilization success nor rate of embryonic development was affected for H. diramphus. The results implied that hypoxia was a potential stress reducing the recruitment of H. elegans through non-adaptive epigenetic effect, whereas H. diramphus was a more tolerant species to survive hypoxic events.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalMarine Pollution Bulletin
Volume74
Issue number1
DOIs
Publication statusPublished - 15 Sep 2013

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Embryonic development
  • Epigenetic effect
  • Fertilization success
  • Gametes
  • Hypoxia
  • Serpulid polychaetes

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