Metabolic and oxidative stress responses of the jellyfish Cassiopea to pollution in the Gulf of Aqaba, Jordan

Samir M. Aljbour*, Fuad A. Al-Horani, Andreas Kunzmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Physiological responses of jellyfish to pollution are virtually overlooked. We measured the activity of two glycolytic enzymes (pyruvate kinase (PK) and lactate dehydrogenase (LDH)), lipid peroxidation (LPO), protein and chlorophyll a content in the jellyfish Cassiopea sp. from polluted and reference sites along the Gulf of Aqaba, Jordan. In jellyfish from polluted sites, low PK/LDH ratios and high LDH activity clarify their reliance on anaerobic metabolism. PK and LDH were positively correlated in the jellyfish. While medusae from polluted sites showed no signs of oxidative stress damage, protein content was significantly lower. This might suggest protein utilization for energy production needed for maintenance. Unchanged LPO in polluted sites indicates the ability of jellyfish to keep reactive oxygen species under control. Overall these results suggest that the jellyfish seems to tolerate the current levels of pollution at the studied sites and they might be anaerobically poised to live at such habitats.

Original languageEnglish (US)
Pages (from-to)271-278
Number of pages8
JournalMarine pollution bulletin
StatePublished - May 2018

Bibliographical note

Funding Information:
This work was supported by Leibniz funds from the Leibniz Gemeinschaft Germany [grant number ZMT-PB-3100/6057 ]. We would like to thank the MSS diving staff for their help in the field, namely Eyad Azgool, Morsi Abuabdalh and Tareq Alsalman. We are grateful to the staff of MSS and ZMT laboratories for support. Special thanks go to Dr. Achim Meyer for his fruitful comments. Funding: We thank the reviewers of this manuscript for their constructive comments.

Publisher Copyright:
© 2018 Elsevier Ltd


  • Anaerobic metabolism
  • Lactate dehydrogenase
  • Lipid peroxidation
  • Pyruvate kinase
  • Sedimentation rate
  • Upside-down jellyfish

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution


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