Avaliação do crescimento de Anomalocardia brasiliana (Gmelin, 1791) na praia de Mangue Seco, litoral Norte do Estado de Pernambuco, Brasil

O marisco Anomalocardia brasiliana apresenta grande importância econômica e social na pesca artesanal do litoral norte de Pernambuco – Brasil, mas a exploração desordenada deste recurso na região pode comprometer os estoques naturais. O presente estudo teve como objetivo analisar as relações morfométricas de crescimento do marisco coletado na praia de Mangue Seco, município de Igarassu, litoral norte de Pernambuco. Para verificar as relações morfométricas da concha foram realizadas regressões não lineares entre as medidas comprimento/largura, utilizando a metodologia de Gauss Newton. Já para análise entre as classes de comprimento ao longo dos meses foi utilizado a ANOVA seguido pelo Teste de Duncan (P<0,05). O mês de julho/2009 apresentou o maior valor relativo ao comprimento médio com 22,76mm. A. brasiliana possui crescimento alométrico entre as medidas morfométricas da concha, indicando que a espécie não apresenta um crescimento constante entre comprimento e largura ao longo do tempo.The clam Anomalocardia brasiliana has a great importance economic and social at the development of artisanal fisheries in the north coast of Pernambuco - Brazil, but uncontrolled exploitation of this resource in the region could compromise the stocks. This study aimed to analyze the morphometric relationships of growth of the clam collected from Mangue Seco beach, Igarassu municipality, north coast of Pernambuco. To verify if the morphometric relationships of the shell have non linear regressions were made it between length / width, using the methodology of Gauss Newton. As for analysis between length classes over the month the ANOVA were used followed by Duncan's Test (P< 0,05). The month of July/2009 showed higher average length of 22.76 mm. A. brasiliana has allometric growth between the morphometric measurements of shell growth, indicating that the species has a long and steady growth among width over time.Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNP

Assessment of risk to human health from simultaneous exposure to multiple contaminants in an artisanal gold mine in Serra Pelada, Pará, Brazil

Federal Rural University of Amazon. Institute of Agricultural Sciences. Belém, PA, Brazil.Federal Rural University of Amazon. Institute of Agricultural Sciences. Belém, PA, Brazil.Federal Rural University of Amazon. Institute of Agricultural Sciences. Belém, PA, Brazil.Federal Rural University of Amazon. Institute of Agricultural Sciences. Belém, PA, Brazil.Federal University of Lavras. Department of Soil Science. Lavras, MG, Brazil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Ananindeua, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Ananindeua, PA, Brasil.Contamination of soil, water and plants caused by gold mining is of great societal concern because of the risk of environmental pollution and risk to human health. The aim of the present study was to evaluate the risk to human health from ingestion of As, Ba, Co, Cu, Cd, Cr, Ni, Pb, Se and Ni present in soil, sterile and mineralized waste, and water and plants at a gold mine in Serra Pelada, Pará, Brazil. Samples of soil, sterile and mineralized waste, water and plants were collected around an artisanal gold mine located in Serra Pelada. The mean concentrations of potentially toxic elements in the soil were higher than the soil quality reference values as defined in the legislation, which may be attributeable to past mining activities. Water from the area close to the mine exhibited As, Ba and Pb concentrations exceeding the reference values established by the World Health Organization, deemed unfit for human consumption. Plants exhibited high Pb concentrations, representing a food safety risk to the population. The mean hazard index (HI) values were below the acceptable limit (1.0) established by the United States Environmental Protection Agency, although the highest HI values observed for adults and children were higher than the respective acceptable limits. Environmental contamination and risk to human health were heterogeneous in the surroundings of the mine. Mitigation strategies need to be adopted to decrease the risks of contamination to the environment and to the local population