Multiple-biomarker approach in a commercial marine scallop from San Jose gulf (Patagonia, Argentina) and the relationship with natural arsenic and cadmium levels

JULIETA STURLA LOMPRÉ; ERICA GIARRATANO; GABRIELA MALANGA; MÓNICA GIL

ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY

SPRINGER

Lugar: Berlin; Año: 2019

0090-4341

The health status of the commercial Tehuelche scallop Aequipecten tehuelchus from two domains of San José gulf (Patagonia, Argentina) was evaluated throughbiomarkers widely used in ecotoxicological applications. Natural levels of arsenic (As) and cadmium (Cd) were measured in order to determine their potential relationships with fluctuations of several oxidative stress biomarkers in the scallop. Oxidative biomarkers such as catalase (CAT), glutathione S-transferase (GST), superoxide dismutase (SOD), metallothioneins (MT), reactive oxygen species (ROS), α-tocopherol (α-T) and lipid peroxidation (LPO) through thiobarbituric acid reactive substances (TBARS) and lipid radical (LR ? ) were measured in gills, digestive gland and muscle of Tehuelche scallop in summer and winter. Levels of As and Cd and of most of biomarkers (SOD, ROS, TBARS and LR ? ) showed strong seasonal variability in the three tissues. In general, the highest values were recorded in digestive gland. The Integrated Biomarker Response (IBR) index indicated that the most stressed condition of A. tehuelchus was in summer in the east domain of San José gulf (San Román). Additionally, the IBR index showed a strong relationship among tissues and As and Cd accumulation. This kind of approach attests the benefit of using an integrated tool to better identify the health status of a population.