| Texto completo | |
| Autor(es): |
Capparelli, M., V
;
McNamara, J. C.
;
Grosell, M. G.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Bulletin of Environmental Contamination and Toxicology; v. 104, n. 6, p. 8-pg., 2020-05-11. |
| Resumo | |
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. (AU) | |
| Processo FAPESP: | 11/08065-9 - Análise qualitativa e quantitativa da poluição por metais no caranguejo chama-marés Uca rapax (Ocypodidae, Brachyura) avaliada por biomarcadores fisiológicos, bioquímicos e genéticos |
| Beneficiário: | Mariana Vellosa Capparelli |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 11/22537-0 - Implicações macroevolutivas da homeostase osmótica, térmica e metabólica em caranguejos neotropicais do entre-marés |
| Beneficiário: | John Campbell McNamara |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 13/10672-6 - Respostas fisiológicas e bioquímicas à exposição ao cobre no caranguejo chama-marés Uca rapax (Crustacea, Ocypodidae): diferentes vias de absorção do metal |
| Beneficiário: | Mariana Vellosa Capparelli |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |