Lead and cadmium contamination in sediments and blue crabs Callinectes danae from a Ramsar wetland in southeastern Brazil
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Pan-American Journal of Aquatic Sciences
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The Cananéia-Iguape-Peruíbe Environmental Protection Area (APA-CIP), on the
southeastern coast of Brazil has been designated as a Ramsar wetland site. This estuary is
impacted by inputs of contaminated water and sediments from the Ribeira de Iguape River
(RIR), in São Paulo state. Inputs of metals are mostly from historical mining and metallurgy
activities in the RIR watershed. This study aimed to evaluate the concentrations of Pb and Cd in
the soft tissues of blue crabs (Callinectes danae) from the APA-CIP, and to determine if the
levels of these metals in crab tissues are correlated with the concentrations of these metals in
sediments from the estuary. Sediments and crabs were collected during the rainy (March) and
dry (September) seasons. Pb concentrations in sediments at two stations in the estuary exceeded
sediment quality guidelines, at concentrations of 13.08 and 40.24 μg.g-1 dry weight,
respectively. Despite these high Pb concentrations in sediments, the levels of Pb in gill and
hepatopancreas tissues of the crabs were relatively low. Cd concentrations in sediments from the
estuary were relatively low, but the concentrations in crab tissues were elevated. For instance,
the Cd concentrations in the hepatopancreas of crabs collected in the March survey at two
stations were 21.73 and 4.24 μg.g-1, respectively. These findings indicate that C. danae may
rapidly depurate Pb, while these crabs may rapidly accumulate and poorly depurate Cd. There
was some indication that the concentrations of Cd in the hepatopancreas of C. danae were
correlated with sediment concentrations, but factors such as varying sand and mud contents of
the sediments, and the potential for migration of the crabs within the estuary may constitute
confounding factors. These data indicate that governmental action is required to control
contamination of this World Heritage Site.
Como referenciar
ARAUJO, G.S.; BORDON, I.C.; CRUZ, A.C.F.; GUSSO-CHOUERI, P.K.; FAVARO, D.I.T.; ROCHA, R.C.C.; SAINT'PIERRE, T.D.; HAUSER-DAVIS, R.A.; SANTELLI, R.E.; BRAZ, B.; FREIRE, A.S.; MACHADO, W.T.V.; ABESSA, D.M.S. Lead and cadmium contamination in sediments and blue crabs Callinectes danae from a Ramsar wetland in southeastern Brazil. Pan-American Journal of Aquatic Sciences, v. 16, n. 2, p. 161-175, 2021. Disponível em: http://repositorio.ipen.br/handle/123456789/32375. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.