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Effects of Calcium and Magnesium Ions on Acute Copper Toxicity to Glochidia and Early Juveniles of the Chinese Pond Mussel Anodonta woodiana
- Liu, Hongbo, Chen, Xiubao, Su, Yanping, Kang, Ik Joon, Qiu, Xuchun, Shimasaki, Yohei, Oshima, Yuji, Yang, Jian
- Bulletin of environmental contamination and toxicology 2016 v.97 no.4 pp. 504-509
- Anodonta woodiana, calcium, cations, copper, juveniles, magnesium, median effective concentration, mussels, toxicity, toxicity testing
- We evaluated the effects of calcium (Ca²⁺) and magnesium (Mg²⁺) ions on copper (Cu) toxicity to glochidia and newly-transformed juvenile mussels (age 1–2 days) of the Chinese pond mussel (Anodonta woodiana). Acute Cu toxicity tests were performed with glochidia for 24 h and juveniles for 96 h with measured Ca²⁺ concentrations of 1.1, 14, 26, 51, and 99 mg L⁻¹, or measured Mg²⁺ concentrations of 2.6, 11, 21, and 39 mg L⁻¹. The Ca²⁺ and Mg²⁺ cations provided no statistically significant protection against Cu toxicity to glochidia or juveniles. The 24-h EC₅₀ value for glochidia was 82 μg L⁻¹ Cu, and contrastly, 96-h EC₅₀ value for newly-transformed juvenile mussels was as low as 12 μg L⁻¹ Cu, implying that the juveniles of A. woodiana are more vulnerable to Cu contamination at concentrations close to currently-accepted levels.