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June 17, 2026Journal of the Marine Biological Association of the United Kingdom

Brittle stars and toxic tales: histological insights into Persian Gulf brittle star Ophiocoma scolopendrina ’s regeneration in cadmium-contaminated waters

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Authors

NNNasim NowruziNBNarges Amrollahi BiukiCFC. Ferrario

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Overview

Randomized trial reveals impaired arm regeneration in Ophiocoma scolopendrina due to cadmium exposure, indicating ecological risks.

Key Points

  • To investigate the effects of cadmium on the regeneration process in Ophiocoma scolopendrina after arm amputation.
  • Specimens collected from Qeshm Island and acclimated to conditions for experimentation.
  • Arm amputation was performed, and regeneration was monitored histologically over multiple time points up to 42 days post-amputation under cadmium exposure (50 µg/l CdCl2).
  • Histological analyses assessed phases of regeneration and structural integrity of regenerated arms.
  • Wound closure was significantly delayed, taking 72 hours under cadmium exposure compared to 24 hours in controls.
  • Arm length at 42 days showed significant reduction: 12 mm in treated versus 17.65 mm in controls.
  • Histological analysis revealed disorganized skeletal ossicles and fragile connective tissues, indicating disrupted biomineralization.

Cite This Study

Nowruzi et al. (2026) studied this question.

synapsesocial.com/papers/6a323c29d50b63ecad206666https://doi.org/10.1017/s002531542610126x
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