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Physiological and biochemical responses to copper exposure in the fiddler crab Uca rapax (Crustacea, Ocypodidae): different pathways of metal uptake

Grant number: 13/10672-6
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): September 01, 2013
Effective date (End): February 28, 2014
Field of knowledge:Biological Sciences - Zoology - Physiology of Recent Groups
Principal researcher:John Campbell McNamara
Grantee:Mariana Vellosa Capparelli
Supervisor abroad: Martin Grosell
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Research place: University of Miami, United States  
Associated to the scholarship:11/08065-9 - A qualitative and quantitative analysis of metal pollution in the fiddler crab Uca rapax (Ocypodidae, Brachyura) evaluated using physiological, biochemical and genetic biomarkers, BP.DR


This study aims to clarify mechanisms of copper toxicity, accumulation and tissue distribution in the fiddler crab Uca rapax (Crustacea, Ocypodidea), a semi-terrestrial crustacean that inhabits a wide range of salinities. Our ultimate goal is to develop a Biotic Ligand Model approach and compare different pathways of metal uptake over a range of salinities after exposure to waterborne and dietary copper. Crabs will be collected on Key Biscayne, Miami, Florida, transported to the Laboratory of Environmental Physiology & Toxicology, at the University of Miami, Florida, where they will be exposed for 10 days to waterborne Cu in contaminated food. Toxicity tests will be performed at different salinities (<0.5, 25 and 60 S) together with measurements of physicochemical parameters and total and dissolved copper concentrations in the experimental media. Thus specific objectives are to examine the influence of salinity on waterborne and dietary copper toxicity, accompanying hemolymph osmolality and ion (Na+ and Cl-) concentrations the gill Na+/K+ ATPase and carbonic anhydrase activity accumulation of copper in different tissues. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CAPPARELLI, V, M.; MCNAMARA, J. C.; GROSELL, M. G.. Tissue Accumulation and the Effects of Long-Term Dietary Copper Contamination on Osmoregulation in the Mudflat Fiddler Crab Minuca rapax (Crustacea, Ocypodidae). Bulletin of Environmental Contamination and Toxicology, v. 104, n. 6, . (11/22537-0, 11/08065-9, 13/10672-6)

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