Specific Death Symptoms and Organic Lesions of Blood Clam Tegillarca granosa in Acute Copper, Zinc, Lead and Cadmium Exposures

Abstract:

Blood clam, Tegillarca granosa, habit in near-shore muddy sediments facing increasing danger of heavy metal contamination. In order to assess the acute toxicity of heavy metals on T. granosa, short term lethal concentration (LC₅₀) of copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) were determined, symptoms of death and organic lesions were illustrated. With relative high LC₅₀ values obtained, T. granosa showed great heavy metal tolerance indicates adaptations to habitat environment. T. granosa died in acute Cd exposure showed specific death symptom with foot extended outside of the tightly closed shells. In this study, different metals led to different organic lesions. Dark red erosive and inflamed gills were observed for T. granosa exposed to acute Cu and Pb, respectively. Inflamed gonad and foot, and contracted mantle were observed for Cd and Zn exposure trials, respectively. The results of this study may provide knowledge to assist in heavy metal pollution bio-monitoring and quick diagnosis of massive death incidence.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 490-493
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.490
• Online since: May 2012
• Authors: Guang Xu Liu, Xue Liang Chai, Yan Qing Shao, Hong Xi Wu
• Keywords: Death Symptom, Environmental Monitoring, Heavy Metal, Organic Lesion, Tegillarca granosa

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