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Hydrobiologia

, Volume 451, Issue 1–3, pp 89–95 | Cite as

Effects of low dissolved oxygen on survival and asexual reproduction of scyphozoan polyps (Chrysaora quinquecirrha)

  • Robert H. Condon
  • Mary Beth Decker
  • Jennifer E. Purcell
Article

Abstract

Hypoxic conditions are common in many coastal environments such as Chesapeake Bay. While medusae appear to be quite tolerant of low dissolved oxygen (DO) concentrations, the effects of hypoxia on the benthic polyp stages are unknown. Chrysaora quinquecirrha (DeSor) polyps, and were subjected to 5 DO treatments (air-saturated [control], 3.5, 2.5, 1.5 and 0.5 mg l−1) in the laboratory. Polyp survival and development were documented over 24 d. Virtually no mortality occurred in any treatment during the first 5 d. Total polyp mortality after 24 d was 59.3% at the lowest DO concentration, whereas <3% mortality was observed in the air-saturated treatment. Formation of stolons and strobilae occurred in all treatments, however, the proportions of polyps undergoing stolonation and strobilation were significantly greater in all DO concentrations above 0.5 mg l−1. Polyp encystment was not observed in any treatment over the course of the 24 d experiment. These results indicate that polyps can survive and asexually propagate even during prolonged exposure to hypoxic conditions.

asexual reproduction Chesapeake Bay hypoxia jellyfish survival polyp 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Robert H. Condon
    • 3
  • Mary Beth Decker
    • 2
  • Jennifer E. Purcell
    • 1
  1. 1.Shannon Point Marine CenterAnacortesU.S.A.
  2. 2.Dept. of Ecology and Evolutionary BiologyYale UniversityNew HavenU.S.A.
  3. 3.Horn Point LaboratoryUniversity of Maryland Center for Environmental ScienceCambridgeU.S.A.

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