Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 104, Issue 6, Pages 755-762Publisher
SPRINGER
DOI: 10.1007/s00128-020-02872-3
Keywords
Dietary copper contamination; Tissue copper accumulation; Osmotic and ionic regulation; Gill enzymes; Fiddler crab
Categories
Funding
- Fundacao de Amparo a Pesquisa do Estado de SAo Paulo (FAPESP) [2011/22537-0, 2011/08065-9, 2013/10672-6]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [300662/2009-2, 303613/2017-3]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [33002029031P8, 001]
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We examined copper accumulation in the hemolymph, gills and hepatopancreas, and hemolymph osmolality, Na+ and Cl- concentrations, together with gill Na+/K+-ATPase and carbonic anhydrase activities, after dietary copper delivery (0, 100 or 500 Cu mu g g(-1)) for 12 days in a fiddler crab, Minuca rapax. In contaminated crabs, copper concentration decreased in the hemolymph and hepatopancreas, but increased in the gills. Hemolymph osmolality and gill Na+/K+-ATPase activity increased while hemolymph [Na+] and [Cl-] and gill carbonic anhydrase activity decreased. Excretion likely accounts for the decreased hemolymph and hepatopancreas copper titers. Dietary copper clearly affected osmoregulatory ability and hemolymph Na+ and Cl- regulation in M. rapax. Gill copper accumulation decreased carbonic anhydrase activity, suggesting that dietary copper affects acid-base balance. Elevated gill Na+/K+-ATPase activity appears to compensate for the ion-regulatory disturbance. These effects of dietary copper illustrate likely impacts on semi-terrestrial species that feed on metal-contaminated sediments.
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