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Comparative Assessment of Cadmium and Copper Toxicity to Physa acuta (Draparnaud, 1805)
Journal article   Peer reviewed

Comparative Assessment of Cadmium and Copper Toxicity to Physa acuta (Draparnaud, 1805)

Emiliano Bálsamo Crespo and Gustavo Bulus Rossini
Bulletin of Environmental Contamination and Toxicology, Vol.107, pp.378-384
2021
DOI: https://doi.org/10.1007/s00128-021-03196-6
PMID: 33778902
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Comparative Assessment of Cadmium and Copper Toxicity to Physa acuta (Draparnaud, 1805)View
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Abstract

Acute exposure Physa acuta Heavy metals Relative toxicity Freshwater gastropods Chronic exposure
Cadmium and copper toxicity was investigated using bioassays with neonates of a freshwater gastropod Physa acuta. Mortality, lethal time, and effects on shell length were studied during 28-day chronic exposure experiments. Relative toxicity was assessed from acute and chronic LC values. Copper showed significantly more toxicity at lower concentrations than cadmium ([Formula: see text] < 0.001), causing mortality at the same response levels. Conversely, cadmium affected shell length at lower concentrations than copper, although no significant differences ([Formula: see text] > 0.05) were found in affected shell length between copper and cadmium at the end of the assays. Lethal time (LT[Formula: see text]) was significantly affected by metal concentration ([Formula: see text] < 0.001), with a reduction of 8.28% and 5.90% in time per 0.001 mg/L increase of copper and cadmium, respectively. Physa acuta neonates showed medium to high sensitivity to cadmium and copper compared to other freshwater gastropod species, showing it is a suitable test organism, particularly for chronic ecotoxicological assessment.

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