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13 November 2015 Toxic Effects of Emerging Pollutants in Juveniles of the Freshwater Gastropod Physa acuta (Draparnaud, 1805)
Alma Sobrino-Figueroa
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In this work, the toxicity of 11 products (three brands of mouthwash, three toothpastes, three detergents and two analgesics) was evaluated in relation to juvenile snails Physa acuta (Draparnaud, 1805). Bioassays of toxicity were conducted and the organisms exposed to six concentrations of each product, along with a control group, to determine the 96-hour LC50 (Lethal Concentration 50). The sensitivity of the gastropods to the different products was determined by comparing their LC50 values to that of acute toxicity values. In addition, the degree of lipoperoxidation in the gastropod tissue was evaluated by measuring the concentration of MDA (malondialdehyde) in sublethal tests (LC10) for chronic toxicity (during 30-day exposure). The toxicity of the products tested varied from highly toxic and harmful (mouthwashes) through harmful (detergents), potentially harmful (analgesics), and non-toxic (toothpastes). The degree of lipoperoxidation observed in the sublethal tests was (from most to least toxic): Analgesics > Mouthwashes > Detergents > Toothpastes. These results indicate that a certain risk exists resulting from the presence in wastewater dumped into aquatic systems of components of these products which may cause adverse effects on populations of P. acuta and other aquatic organisms.

Alma Sobrino-Figueroa "Toxic Effects of Emerging Pollutants in Juveniles of the Freshwater Gastropod Physa acuta (Draparnaud, 1805)," American Malacological Bulletin 33(2), 337-342, (13 November 2015).
Received: 1 November 2014; Accepted: 1 March 2015; Published: 13 November 2015

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