Tissue Accumulation and the Effects of Long-Term Dietary Copper Contamination on Osmoregulation in the Mudflat Fiddler Crab Minuca rapax (Crustacea, Ocypodidae)

Autor(es)

Capparelli, V, M. ; McNamara, J. C. ^{[1, 2]} ; Grosell, M. G. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Biol Marinha, BR-11600000 Sao Sebastiao, SP - Brazil

^[2] Capparelli, M., V, Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Biol, BR-14040901 Ribeirao Preto, SP - Brazil

^[3] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Marine Biol & Fisheries, 4600 Rickenbacker Causeway, Miami, FL 33149 - USA

• Tipo de documento: Artigo Científico
• Fonte: Bulletin of Environmental Contamination and Toxicology; v. 104, n. 6 MAY 2020.
• Citações Web of Science: 0

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: 11/22537-0 - 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: 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: 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