Evaluation of the effects of atmospheric particulate material on the species Macrobrachium rosenbergii oxidative system

• Grant number: 22/00987-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): August 01, 2022
• Effective date (End): October 31, 2023
• Field of knowledge: Biological Sciences - Physiology - General Physiology
• Principal Investigator: Cléo Alcantara Costa Leite
• Grantee: Ludmila Mendes Silva
• Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 19/08491-0 - Atmospheric particulate material and environmental contamination. Impact assessment in the aquatic biota in an integrated ecophysiotoxicological approach, AP.TEM

Abstract

Industrial and technological development has allowed several advances for society. However, the pollution resulting from anthropogenic actions is a factor that acts negatively on the maintenance of aquatic ecosystems. In Brazil, the city of Vitória (ES) has a massive industrial complex for processing iron ore. It is responsible for the emission of large amounts of atmospheric particulate matter (PM). PM that may settle (SePM) and reach estuarine environments in that region through a process of air-water cross-contamination. SePM is rich in heavy metals and can generate air to water cross-contamination, which results in bioaccumulation and biomagnification in the food chain, potentially posing environmental and human health risks. This contamination pattern is not observed in the Brazilian environmental legislation, and data on its impacts are remarkably relevant for such regulation. Thus, the present IC application is inserted in the scope of the thematic project FAPESP #2019/08491-0 and aims to evaluate the effects of exposure to different concentrations of SePM in crustaceans. For the tests, post-larval and juvenile stages of the commercial shrimp species Macrobrachium rosenbergii will be used. Crustaceans occupy a very important position in the food chain so that damage to this group can generate relevant environmental problems. Early life stages are more susceptible to damage, especially oxidative damage, and may be more susceptible to contaminants in general. We will use bioindicators of oxidative stress (SOD, CAT, and GPx) to determine the consequences of short-term exposure 96h to ecologically relevant concentrations of diluted SePM. The data from this project can generate relevant information for the theme that supports us, for the database that will aid discussions about the environmental problem, legislation, and control and monitoring points.(AU)