Approved Abstracts

TOXICITY OF SUNSCREENS ON THE COMMERCIAL BIVALVE RUDITAPES PHILIPPINARUM



Author(s): Departamento de Ecología y Gestión Costera, Instituto de Ciencias Marinas de Andalucía (CSIC). Campus Universitario Río San Pedro, 11519, Puerto Real, Spain; Departamento de Química Analítica, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Universitario Río San Pedro, 11519, Puerto Real, Spain; Departamento de Biología Marina y Acuicultura, Instituto de Ciencias Marinas de Andalucía (CSIC). Campus Universitario Río San Pedro, 11519, Puerto Real, Spain; Departamento de Biología Marina y Acuicultura, Instituto de Ciencias Marinas de Andalucía (CSIC). Campus Universitario Río San Pedro, 11519, Puerto Real, Spain; Departamento de Ecología y Gestión Costera, Instituto de Ciencias Marinas de Andalucía (CSIC). Campus Universitario Río San Pedro, 11519, Puerto Real, Spain;
Presenter: Araceli Rodríguez Romero

Intimately linked to the growth of coastal tourism and the awareness of the risks associated with the skin exposure to ultraviolet (UV) radiation, is the use of sunscreens. Given its high and widespread consumption and the multitude of chemical ingredients included in its formulation, these products have been considered as emerging contaminants in aquatic environments. This work aims to assess the potential effects of a commercial sunscreen containing both inorganic and organic UV filters, on the commercial clam Ruditapes philippinarum. To this end, clams were exposed under laboratory conditions to 6 different sunscreen concentrations (ranged from 0 mg L-1 (control) to 2000 mg L-1) for a period of 10 days. Survival, Zn accumulation in whole body and histological lesions, were employed as endpoints. Mortality was significant in those treatments with highest sunscreen concentrations, with 100 % mortality recorded in clams exposed to the 2000 mg L-1 treatment after 6 days of exposure. Zinc concentration in tissues showed a clear sunscreen presence dependent accumulation. The variation in sunscreen concentration treatment and exposure time affect deeply the accumulation of Zn in clam tissues. After 6 days of exposure, differences in metal concentration was observed between the sunscreen treatments 50 mg L-1, 100 mg L-1 and 200 mg L-1 and the lowest sunscreen concentration (5 mg L-1) and the control (p <0.01 at day 6 and 8; p <0.01 at day 10). Histological analysis of clams from the different sunscreen concentrations revealed similar damage in several target organs as gills, digestive tract and digestive gland, i.e. hypertrophy, cytoplasmic vacuolization, cellular shrinkage, swelling up of the epithelium, inflammatory response and necrosis. The severity and occurrence of such alterations increased progressively with the increase of sunscreen concentrations. This work provides novel and relevant information about the consequences of sunscreens containing both organic and inorganic UV filters on a commercial clam species.
Financial Support: This work has been co-financed by the European Union under the 2014-2020 ERDF Operational Programme and by the Department of Economic Transformation, Industry, Knowledge, and Universities of the Regional Government of Andalusia (Project reference: FEDER-UCA18-106672). A. Rodríguez-Romero is supported by the Spanish grant “Juan de la Cierva Incorporación 2019” (IJC2018-037545-I).


Keywords: Sun protection Product; Bioaccumulation; Histopathology damage

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