Physiological responses of the symbiotic shrimp Ancylocaris brevicarpalis and its host sea anemone Stichodactyla haddoni to ocean acidification


  • Low pH condition have triggered the lipid peroxidation in anemone and shrimp.
  • AP showed less values in shrimp and anemone could be because of low pH stress.
  • Antioxidant enzymes showed upward tendency as an indicator for oxidative stress.
  • Short term exposure had adversely affected the physiology of anemone and shrimp.


In this study, the physiology of symbiotic ‘peacock-tail’ shrimp Ancylocaris brevicarpalis and its host ‘Haddon’s carpet’ sea anemone Stichodactyla haddoni were tested under lowered pH (7.7) and control (8.1) conditions. The biochemical responses such as digestive enzyme (AP), organic acids (lactate and succinate), oxidative damages (MDA), antioxidants metabolites/enzymes (ASC, GSH, SODCATAPXGPX, GR, POX, and PHOX), and detoxification enzyme (GST) were measured. The AP showed insignificantly reduced values in both the organisms in lowered pH conditions compared to control indicating the effect of abiotic stress. The hierarchical clustering analysis indicated low MDA in sea anemone can be explained by higher POX, APX, GR, ASC, and GSH levels compared to shrimps. However, the detoxification enzyme GST showed less activity in sea anemones compared to shrimps. The results suggest that A. brevicarpalis and sea anemone S. haddoni may have deleterious effects when exposed to short-term acidification stress.

Prakash S., Kumar A., Okla M. K., Ahmad A., Abbas Z. K., Al-ghamdi A. A., Beemster G. & AbdElgawad H., 2022. Physiological responses of the symbiotic shrimp Ancylocaris brevicarpalis and its host sea anemone Stichodactyla haddoni to ocean acidification. Marine Pollution Bulletin 175: 113287. doi: 10.1016/j.marpolbul.2021.113287. Article (subscription required).

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