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• W2089082955 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 477:135-145 (2013) - DOI: https://doi.org/10.3354/meps10175 Physiological and behavioural responses of different life stages of a serpulid polychaete to hypoxia Y. S. Leung1, P. K. S. Shin1, J. W. Qiu2, P. O. Ang3, J. M. Y. Chiu4, V. Thiyagarajan4, S. G. Cheung1,* 1Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR 2Department of Biology, Hong Kong Baptist University, Hong Kong, SAR 3School of Life Sciences, Chinese University of Hong Kong, New Territories, Hong Kong, SAR 4School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, SAR *Corresponding author. Email: bhsgche@cityu.edu.hk ABSTRACT: Hypoxia has become a major threat to coastal marine ecosystems worldwide. Among various groups of marine invertebrates, sessile ones are more susceptible to hypoxia since they cannot move away from hypoxic waters. The serpulid polychaete Hydroides elegans Haswell, 1883 is a fast-proliferating, dominant, sessile-fouling species in the tropical Pacific, which includes Hong Kong. We studied the effects of hypoxia on the fertilization success, embryogenesis and physiological and behavioural responses in both larval and adult stages of H. elegans. Results showed that fertilization success was reduced and embryogenesis was retarded at a dissolved oxygen (DO) level of 2 mg O2 l-1. At this DO level, the swimming velocity of the 2 d old larvae significantly increased, which may serve as an escape response. H. elegans showed a very high tolerance to hypoxia in both larval and adult stages, as indicated by the 24 and 48 h lethal DO concentation (LC50). However, the respiration rate and clearance rate of adult H. elegans were significantly reduced at 2 mg O2 l-1. Partial recovery was observed 2 d after normoxia was resumed. Previous studies have demonstrated that adult H. elegans suffer from high mortality and that there are no new recruits in summer when the temperature is high and DO concentration low. The results are interpreted as the effect of low salinity. Our study has strengthened the notion that low salinity contributes to adult mortality in summer; however, the lack of summer recruitment is possibly a result of the combined effect of low salinity and hypoxia. KEY WORDS: Hypoxia · Hydroides elegans · LC50 · Embryogenesis · Respiration rate · Clearance rate Full text in pdf format PreviousNextCite this article as: Leung YS, Shin PKS, Qiu JW, Ang PO, Chiu JMY, Thiyagarajan V, Cheung SG (2013) Physiological and behavioural responses of different life stages of a serpulid polychaete to hypoxia. Mar Ecol Prog Ser 477:135-145. https://doi.org/10.3354/meps10175 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 477. Online publication date: March 12, 2013 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2013 Inter-Research." @default.
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• W2089082955 title "Physiological and behavioural responses of different life stages of a serpulid polychaete to hypoxia" @default.
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