| Grant number: | 17/10211-0 |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| Start date: | September 01, 2017 |
| End date: | December 31, 2021 |
| Field of knowledge: | Physical Sciences and Mathematics - Oceanography - Biological Oceanography |
| Principal Investigator: | Denis Moledo de Souza Abessa |
| Grantee: | Bruno Galvão de Campos |
| Host Institution: | Instituto de Biociências (IB-CLP). Universidade Estadual Paulista (UNESP). Campus Experimental do Litoral Paulista. São Vicente , SP, Brazil |
| Associated scholarship(s): | 19/19898-3 - Trophic transfer assessment of the antifouling biocide DCOIT, in nano and non-nanostructured forms, in marine organisms, BE.EP.DR |
Abstract The biocide Sea-Nine (4,5-dichloro-2-n-octyl-4-isothiazolin-3-one) has been widely used as active principle in third generation antifouling paints, since the Tributyltin (TBT) based coatings were banned. There are few studies on the toxicity of the Sea-Nine to non-target organisms as well as its ecological risks; moreover, its mechanisms of action (at cellular and biochemical levels) are still not fully understood. This project aims to assess the toxicity of Sea-Nine to marine invertebrates, as well as investigate its key mechanisms of action, in order to provide some information on the ecological risks related to this biocide. To accomplish that, aqueous solutions and spiked sediments contaminated with Sea-Nine will be evaluad by means of acute or chronic toxicity tests using the following organisms: Nitocra sp (Copepod), Tiburonella viscana (amphipod), Kalliapseudes schubartii (tanaidaceous), Perna perna (bivalve) embryos, Echinometra lucunterm (sea-urchin), and Artemia sp (Anostraca). The mechanisms of action at the cellular and biochemical levels will be analyzed through biochemical and cellular biomarkers (GST, GSH, GPx, Lipoperoxidation, DNA damage, ATPases, Caspases and neutral red retention assay) using the bivalve Perna perna exposed to environmentally relevant concentrations of the Sea-Nine. This proposal is innovative because it is the first study considering the toxic effects of the Sea-Nine to non-target neotropical organisms. The results will provide important information on the effects and ecological of the Sea-Nine, which could support biomonitoring actions and the establishment of environmental laws and enforcements. | |
| News published in Agência FAPESP Newsletter about the scholarship: | |
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