Impacto geno e citotóxico em populações do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae), em manguezais do estado de São Paulo, Brasil

• Ano de defesa: 2014
• Autor(a) principal: Duarte, Luís Felipe de Almeida [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Crustacea; Crustaceo; Citotoxicidade; Toxicologia genética; Ucides cordatus; Caranguejo; Manguezais - Baixada Santista (SP); Metais - Poluição
• Link de acesso: http://hdl.handle.net/11449/121873

This study evaluated the metals contamination level of water, sediment, woody vegetation (Rhizophora mangle) and the “uçá”-crab (Ucides cordatus) in six mangrove areas located in São Paulo State, as well as the geno cytotoxic impact on the populations of this crustacean, based on micronucleated hemocytes (hyalinocytes) frequency and the retention time of neutral red in their lysosomes. Mangroves are permanent preservation areas (PPAs) and nurseries to several animal species, including the “uçá”-crab, which is widely traded and consumed by humans at coastlands. Six mangrove areas located in São Paulo State (Cananéia, Iguape Juréia, Cubatão, São Vicente and Bertioga) were evaluated, each of them were represented by three replicas. Samples from sediment, leaves of woody vegetation (R. mangle), body structures from “uçá”-crab (U. cordatus) and water from burrows of this crustacean were collected to dosage of six total metals (Cd, Cu, Pb, Cr, Mn and Hg) by atomic absorption spectrophotometer. The metals concentrations were compared by ANOVA and their means by Tukey (at 5%). The results regarding the tendencies of accumulation of six metals are in accordance with the literature, since the Cd, Pb, Cr and Hg have accumulated more in sediment than in others biotic-abiotic compartments analyzed, whereas Cu and Mn have showed higher concentrations in U. cordatus body structures and R. mangle leaves, respectively. At São Paulo mangroves, taking into account the availability of metals associated with their presence in water, sediment and leaves of R. mangle, the results suggest that each area (locality) has one or more metals in larger relative proportions, namely: Cubatão and Bertioga: Pb and Cd; São Vicente: Hg; Juréia: Cr; Iguape: Cu, Mn and Hg; and Cananéia: Mn (smaller scale). About the “uçá”-crab metals accumulation by mangrove area, it were found an association of Cu and Mn in animals from São Vicente and...