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El objetivo de la presente investigación fue determinar, mediante Espectrofotometría de Absorción Atómica (AAS), la concentración de metales pesados (plomo, cromo, arsénico y mercurio) en tejido blando del cangrejo rojo (Ucides occidentalis). Las capturas se realizaron en cinco estaciones de muestreo a lo largo de las riberas del estero Huaylá, Machala, Ecuador, en octubre de 2014. Los especímenes se colocaron en fundas de polietileno y se refrigeraron hasta el momento del análisis, los tejidos se obtuvieron de la parte cefalotoráxica, de la cual se tomaron 2,5 g de muestras, estas se digirieron mediante oxidación húmeda para poder ser analizadas a través de AAS. Los resultados obtenidos reflejan que la mayor concentración promedio de plomo (Pb) en tejido blando de cangrejo rojo fue de 13,5 ± 0,45 mg.kg-1 en la estación de muestreo 3 y cromo (Cr) 8,84 ± 0,06 mg.kg-1 en la estación de muestreo 1. La concentración mayor de arsénico (As) fue de 33,59 ± 0,38 mg.kg-1 en la estación de muestreo 4 y mercurio (Hg) 142,54 ± 0,39 mg.kg-1 en la estación de muestreo 4. Por consiguiente, se concluyó que los contenidos de metales analizados superaron los límites máximos establecidos por la Unión Europea (2014) para este tipo de alimento, en todas las estaciones de muestreo. AbstractThe objective of this research was to determine by atomic absorption spectrophotometry (AAS), the concentration of heavy metals (lead, chromium, arsenic and mercury) in the soft tissue of the red crab (Ucides occidentalis). Catches were conducted in five sampling stations along the banks of the estuary Huayla, Machala, Ecuador, in October 2014. The specimens were placed in polyethylene bags and refrigerated until the time of analysis; 2.5 g of tissue samples from the cephalothorax was obtained and digested by wet oxidation to be analyzed by atomic absorption spectrophotometry. The results showed that the highest average concentration of lead (Pb) in soft tissue red crab was 13.5 ± 0.45 mg.kg-1 in the sampling station 3 and chromium (Cr) 8.84 ± 0, 06 mg.kg-1 in the sampling station 1. The highest concentration of arsenic (As) was 33.59 ± 0.38 mg.kg-1 in the sampling station 4 and mercury (Hg) 142.54 ± 0.39 mg.kg-1 in the sampling station 4. Therefore we conclude that in all sampling stations the content of heavy metals exceeds the ceilings set by the European Union (2014) for this type of food.
BASE
In: Ricerche
In: storia
In: Revista desenvolvimento social, Band 29, Heft 1, S. 104-125
ISSN: 2179-6807
O presente artigo visa descrever a prática de captura do caranguejo-uçá realizada através do gancho, uma ferramenta artesanal, utilizada no município de Marapanim/PA; e verificar as perspectivas socioambientais dos extrativistas acerca dessa atividade. O estudo possui abordagem socioantropológica, realizada através de entrevistas semiestruturadas e conversas informais, com campo realizado em 2021, em colaboração com especialistas na captura de moluscos e crustáceos nos manguezais marapanienses. O argumento central está voltado na perspectiva de um extrativista acerca da forma de captura do caranguejo-uçá. Como resultados, destacamos duas técnicas tradicionais de captura, a técnica do gancho e a técnica de captura no braço, práticas de subsistência que contribuem para a conservação, renovação dos estoques pesqueiros e a comercialização.
In: http://hdl.handle.net/10280/61870
Il Gruppo Lombardo dell'UCID fu costituito a Milano l'11 maggio 1945 per iniziativa di uomini provenienti dall'ambiente dell'Azione Cattolica, del SEDAS e dell'ICAS, nonché importanti esponenti dell'imprenditoria, del management e del mondo bancario lombardo e milanese del tempo. Scopo primo dell'Associazione era "formare gli aderenti ai principi della morale professionale e […] promuovere l'attuazione del pensiero sociale nel campo dell'industria e del lavoro". Il Gruppo Lombardo è stato studiato con riferimento al periodo compreso tra la sua costituzione e la fine degli anni Sessanta/primi Settanta. In particolare, data l'importanza attribuita già da Statuto all'attività di formazione, ci si è concentrati sulla sua proposta formativa, sia da un punto di vista religioso e morale che tecnico e con riferimento a tematiche economiche, politiche, sociali o connesse all'attualità del tempo. Infine, si è presa in esame anche l'esperienza del Segretariato UCID di Servizio sociale e delle assistenti sociali collocate tramite tale ufficio presso diverse sedi della Giovanni Bassetti S.p.A. ; The Gruppo Lombardo had been founded in Milan on 11th May 1945 by a group of people belonging to the Italian Catholic Action or to other Catholic bodies and that were, at the same time, important Lombard entrepreneurs, managers or bankers. The Association's main aim was to spread among its members the knowledge of the principles of the Catholic social doctrine and to encourage their use in everyday working life. The Gruppo Lombardo was studied from its foundation up to the late 1960s/early 1970s. More precisely, because of the importance given by the Association to training and education, we focused on its initiatives in these fields; moreover, we examined also the case of the Segretariato UCID di Servizio sociale and of social workers belonging to this office but working for Giovanni Bassetti S. p. A.
BASE
In: Environmental science and pollution research: ESPR, Band 25, Heft 35, S. 35672-35681
ISSN: 1614-7499
Mangroves are productive ecosystems of tropical coastal landscapes, constituting habitat for many commercial fisheries, as the crab Ucides cordatus. In Brazil this crab holds a major socio-economic importance for artisanal fishery, but with obvious decline on their productivity. In this study we determined and mapped the more suitable mangrove areas for the conservation and fishery of this crab in the São Francisco River Estuary (Northeastern Brazil). We applied a Multi-Criteria Evaluation (MCE) in a GIS environment. Ten criteria in total were used, including crab biotic parameters, land use/cover and social factors. Maps of each criterion were produced by GIS techniques with CBERS and SPOT images and by field data. Mangroves more suitable for the conservation of U. cordatus (9.4 km2) are near to the river mouth, due to high density and frequency of non-commercial size crabs (NCSC), low density of commercial size crabs (CSC), small crabs and low degree of use for fishery. On the other hand, the mangroves for the crab fishery occurred with a similar area (10.2 km2) located farther away from the river mouth, with a high density and frequency of CSC, low density of NCSC, big crabs, medium-high degree of use for fishery and near to the villages. These information and thematic maps can aid government agencies in delineating extractive and fishery exclusion areas, thus contributing to the management plan for this species.
BASE
In: Boletim do Museu Paraense Emílio Goeldi. Ciências naturais, Band 1, Heft 3, S. 97-102
ISSN: 2317-6237
Larvas de algumas espécies de crustáceos são lecitotróficas, completando seus estágios de desenvolvimento larval sem a necessidade de alimentos. Entretanto, a alimentação no estágio de zoea I de Ucides cordatus (LINNAEUS, 1763) parece ser essencial para suprir as necessidades nutricionais indispensáveis ao complemento de seu desenvolvimento larval. Para comprovar a necessidade de alimento e testar a eficiência de diferentes tipos de dietas sobre as taxas de sobrevivência durante as fases iniciais de zoea, foram aplicados cinco tratamentos, em triplicata, utilizando Thalassiosira weissflogii, Skeletonema costatum, Dunaliella viridis, Artemia sp. e Artemia sp. com Thalassiosira weissflogii (tratamentos: Tw, Sc, Dv, A e ATw, respectivamente). Nos cinco tratamentos empregados, os percentuais de larvas que mudaram para o estágio de zoea II foram de 17%, 18,3%, 27%, 58% e 80% para Dv, A, Sc, Tw e ATw, respectivamente. Foi possível verificar que os tratamentos com T. weissflogii (58 %) e Artemia sp. com T. weissflogii (80%) supriram as necessidades nutricionais das larvas zoea I e II, demonstrando que estas espécies planctônicas constituem uma fonte adequada de alimento nestes estágios larvais. Por outro lado, D. viridis não foi nutritivamente adequada para alimentação de zoea I e II de U. cordatus sob as condições experimentais utilizadas.
In: Marine policy, Band 131, S. 104642
ISSN: 0308-597X
In: Ambiente & sociedade, Band 21, Heft 0
ISSN: 1809-4422
Abstract Uçá-crab consumption is a cultural trait in Brazil, but overexploitation threats the species. The defeso is a moratorium aimed to protect the uçá - prohibiting capture/sell - but such strategy requires public support. The perception about the defeso among consumers/vendors in Recife - PE was analyzed indicating contradictions between declared concern and practices. Although 50% of vendors identified a decrease in supply and 88% declared concern, 50% did not know the crab´s minimum size for sell, 75% did not respect the defeso, and 50% had never heard about it. 76% of consumers declared concern, but 90% were not interested on crab´s origin and 53% did not know about defeso. People who claim to know the defeso defined it correctly, but 84% missed correct dates; 61% consumed crabs even during the defeso. Although > 95% of the public would like to know more about the defeso, such information is not reaching that public, weakening the strategy.
In: Environmental science and pollution research: ESPR, Band 26, Heft 16, S. 15884-15893
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 25, Heft 16, S. 15962-15970
ISSN: 1614-7499
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 133, S. 176-187
ISSN: 1090-2414