http://dx.doi.org/10.1016/j.marpolbul.2014.03.009">
 

Document Type

Journal Article

Department/Unit

Department of Biology

Title

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

Language

English

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. © 2014 Elsevier Ltd.

Keywords

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

Publication Date

2014

Source Publication Title

Marine Pollution Bulletin

Volume

85

Issue

2

Start Page

439

End Page

445

Publisher

Elsevier

ISSN (print)

0025326X

ISSN (electronic)

18793363

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