Acute hypoxic exposure affects gamete quality and subsequent fertilization success and embryonic development in a serpulid polychaete

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

3 Citations (Scopus)

Abstract

Hypoxia likely compromises the reproductive success of those marine organisms carrying out external fertilization because their gametes and embryos are inevitably exposed to the external environment. Hydroides elegans, a dominant serpulid polychaete in Hong Kong waters, can spawn throughout the year but the number of recruits drops during summer when hypoxia commonly occurs. This study attempted to explain such observation by investigating the gamete quality, including sperm motility, egg size, complexity and viability, after 1-h hypoxic exposure (1mg O2l-1). In addition, how gamete quality affects fertilization success and embryonic development was examined. After 1-h hypoxic exposure, sperm motility was significantly reduced, compromising fertilization success. Although the eggs remained viable, more malformed embryos and retarded embryonic development were observed. We interpreted that the harmful effect of hypoxia on embryonic development was attributed to the teratogenicity and induced oxidative stress, ultimately causing the reduction in recruitment during summer.

Original languageEnglish
Pages (from-to)439-445
Number of pages7
JournalMarine Pollution Bulletin
Volume85
Issue number2
DOIs
Publication statusPublished - 30 Aug 2014

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Embryonic development
  • Fertilization success
  • Gametes
  • Hydroides elegans
  • Hypoxia
  • Malformation

Fingerprint

Dive into the research topics of 'Acute hypoxic exposure affects gamete quality and subsequent fertilization success and embryonic development in a serpulid polychaete'. Together they form a unique fingerprint.

Cite this