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| Registros recuperados: 98 | |
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| Fillion, Myriam; Centro de Desenvolvimento Sustentável, Universidade de Brasília; Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l’environnement (CINBIOSE), Université du Québec à Montréal; Department of Biology, University of Ottawa; fillion.myriam@uqam.ca; Saint-Charles, Johanne; Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l’environnement (CINBIOSE), Université du Québec à Montréal; Faculté de communication, Université du Québec à Montréal; saint-charles.johanne@uqam.ca; Mongeau, Pierre; Faculté de communication, Université du Québec à Montréal; mongeau.pierre@uqam.ca; Mergler, Donna; Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l’environnement (CINBIOSE), Université du Québec à Montréal; mergler.donna@uqam.ca. |
| Social networks are a significant way through which rural communities that manage resources under common property regimes obtain food resources. Previous research on food security and social network analysis has mostly focused on egocentric network data or proxy variables for social networks to explain how social relations contribute to the different dimensions of food security. Whole-network approaches have the potential to contribute to former studies by revealing how individual social ties aggregate into complex structures that create opportunities or constraints to the sharing and distribution of food resources. We used a whole-network approach to investigate the role of network structure in contributing to the four dimensions of food security: food... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Amazon; Common property regimes; Community-based management; Fish consumption; Food security; Mercury; Natural resource management; Social networks; Strong ties. |
| Ano: 2015 |
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| Klautau-Guimarães,Maria de Nazare; DAscenção,Renata; Caldart,Fabiana A.; Grisolia,Cesar K.; Souza,Jurandir R. de; Barbosa,Antonio C.; Cordeiro,Célia M.T.; Ferrari,Iris. |
| We investigated Individual differences in susceptibility to methylmercury (MeHg) contamination and its relationship with polymorphisms of the detoxifying enzyme glutathione S-transferase (GST). In Brazil, some Amerindian tribes from the Amazon region have an increased level of mercury in their hair. Samples of hair and blood were taken from inhabitants of two villages in the Kayabi and Munduruku Amerindian communities to investigate mercury levels in association with genetic polymorphism of GSTs. Other molecular biological markers were also studied, such as hemoglobin, haptoglobin and glucose 6-phosphate dehydrogenase (G-6-PDH). Higher levels of mercury contamination were found in the Kayabi villagers, who had a null genotype (GSTM1 0/0, also denominated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amerindian; Genetic polymorphism; Glutathione S-transferase; Mercury. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500027 |
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| Рябушко, В. И.; Егоров, В. Н.; Козинцев, А. Ф.; Костова, С. К.; Шинкаренко, В. К.. |
| Исследовано содержание ртути в мягких тканях и раковинах мидии Mytilus galloprovincialis Lam. из бухт Крымского побережья Черного моря в зависимости от индивидуального возраста моллюсков. Линейные размеры мидии (L, мм) в зависимости от времени (t, годы) хорошо аппроксимируются экспоненциальной функцией: L = L0 + b lg t, а концентрация ртути (C, мкг/гсух): C = C0 + b1 lg t. Коэффициенты уравнения отражают различия в экологических условиях обитания животных и уровнях загрязнения среды. Индивидуальный возраст двустворчатых моллюсков является хорошим интегральным биомаркером для изучения распределения токсикантов, в частности ртути, в популяциях мидий из различных районов шельфа Черного моря. Зависимость между содержанием ртути в мягких тканях мидий из... |
| Tipo: Journal Contribution |
Palavras-chave: Мидия; Возраст; Ртуть; Черное море; Mussel; Age; Mercury; The Black Sea Age Mercury Age Mercury http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_4751. |
| Ano: 2002 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/144 |
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| Шинкаренко, В. К.; Егоров, В. Н.; Рябушко, В. И.; Козинцев, А. Ф.; Костова, С. К.. |
| Исследовано содержание ртути в мягких тканях и раковинах мидии Mytilus galloprovincialis Lam. из бухт Крымского побережья Черного моря в зависимости от индивидуального возраста моллюсков. Линейные размеры мидии (L, мм) в зависимости от времени (t, годы) хорошо аппроксимируются экспоненциальной функцией: L = L0 + b lg t, а концентрация ртути (C, мкг/гсух): C = C0 + b1 lg t. Коэффициенты уравнения отражают различия в экологических условиях обитания животных и уровнях загрязнения среды. Индивидуальный возраст двустворчатых моллюсков является хорошим интегральным биомаркером для изучения распределения токсикантов, в частности ртути, в популяциях мидий из различных районов шельфа Черного моря. Зависимость между содержанием ртути в мягких тканях мидий из... |
| Tipo: Journal Contribution |
Palavras-chave: Мидия; Возраст; Ртуть; Черное море; Mussel; Age; Mercury; The Black Sea Age Mercury Age Mercury http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_4751. |
| Ano: 2002 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/144 |
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| Egorov, V. N.; Lazorenko, G. E.; Mirzoeva, N. Yu.; Stokozov, N. A.; Kostova, S. K.; Malakhova, L. V.; Pirkova, V.; Arkhipova, S. I.; Korkishko, N. F.; Popovichev, V. N.; Plotitsyna, O. V.; Migal, L. V.. |
| The concentrations of 137Cs, 40K, 90Sr, 210Ро radionuclides, mercury and polychlorbiphenyls were determined in the Black Sea mussels collected in four different areas of the Crimean coast depending on places of sampling, the shell length of mollusks and the stages of their gonads development. The study was carried out in the framework of CIESM “Mussel Watch” Programme. |
| Tipo: Journal Contribution |
Palavras-chave: Radionuclides; Mercury; Polychlorbiphenyls; The Black Sea mussels; The Crimean coast; Радионуклиды; Полихлорбифенилы; Ртуть; Черноморские мидии; Побережье Крыма Mercury Mercury http://aims.fao.org/aos/agrovoc/c_4751. |
| Ano: 2006 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/295 |
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| Рябушко, В. И.; Козинцев, А. Ф.; Костова, С. К.; Парчевская, Д. С.; Шинкаренко, В. К.. |
| Исследовано содержание ртути в мягких тканях и раковинах мидий Mytilus galhprovinciulis Lam. в зависимости от индивидуального возраста моллюсков из акваторий мыса Тарханкут, Карадагского природного заповедника, г. Ялты, в т.ч. глубоководного выброса хозяйственно-бытовых и сточных вод. Линейные размеры раковины мидии в зависимости от их возраста хорошо апроксимируются степенной функцией, а концентрация ртути в теле и раковине - квадратичной параболой. Акватория г. Ялты характеризуется высоким уровнем загрязнения мидий ртутью (выше предельно-допустимой концентрации, установленной требованиями санитарных норм для пищевых продуктов), начиная с самых мелких животных. Фоновые значения содержания Hg в воде во всех районах исследований ниже ПДК для природных... |
| Tipo: Journal Contribution |
Palavras-chave: Ртуть; Вода; Донные отложения; Мидия; Черное море; Mercury; Water; Bottom sediment; Mussels; Black Sea Mercury Bottom water Sediments Mercury http://aims.fao.org/aos/agrovoc/c_4751. |
| Ano: 2005 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/221 |
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| Schafer, J; Blanc, Gerard; Audry, S; Cossa, Daniel; Bossy, C. |
| Dissolved and particulate Hg fluxes in the Lot-Garonne-Gironde fluvial-estuarine system were obtained from observation of daily discharge and suspended particulate matter (SPM) concentrations. In addition to the measurements of the total dissolved (< 0.45 gm) and particulate Hg (> 0.45 gm), called HgTD and HgTp respectively, the dissolved inorganic Hg species (HgRD) were determined monthly. Geochemical background values for HgTp in sediments and SPM were similar to crustal values and to typical concentrations in SPM of non-contaminated river systems, respectively. The Riou Mort watershed already known as the origin of important historical polymetallic (e.g., Cd, Zn) pollution was identified as an important Hg point source. In the downstream Lot... |
| Tipo: Text |
Palavras-chave: Lot; Garonne; SPM; River; Organic matter; Mercury. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1343.pdf |
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| Lahaye, V; Bustamante, Paco; Dabin, W; Churlaud, C; Caurant, Florence. |
| Tissues of foetus-mother pairs of common dolphins (Delphinus delphis) stranded along the French coasts (Bay of Biscay and English Channel) were analysed for their Cd, Cu, Hg, Se and Zn contents. In the kidneys, foetal Cd levels were extremely low, and strong relationships between Cu and Zn suggested the involvement of metallothioneins since early foetal life. The results also indicated a limited maternal transfer of Hg during pregnancy since levels in the tissues of foetuses were below 1 mu g g(-1) w.wt. However, hepatic Hg levels in foetuses increased with body length, and were also proportionate to maternal hepatic, renal and muscular Hg levels. Lastly, affinities between Hg and Se in tissues would participate in Hg neutralisation in both mothers-through... |
| Tipo: Text |
Palavras-chave: North eastern Atlantic; Pregnancy; Selenium; Mercury; Marine mammals. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3691.pdf |
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| Muresan Paslaru, Bogdan. |
| The mercury cycle was explored in the Petit-Saut reservoir / Sinnamary Estuary continuum in French Guiana. Main processes involve (i) photo-induced reduction, (ii) adsorption and desorption at the particle surfaces, (iii) methylating bacterial activity, (iv) precipitation and dissolution of iron oxyhydroxides and sulfides. Sources of mercury to the Petit-Saut reservoir consist of the partly impacted river-tributaries, the atmospheric deposition and the flooded soils or vegetation. Once into the reservoir, divalent mercury undergoes a large spectrum of transformations including speciation and phase changes. We, here, probe these processes and demonstrate that the Petit-Saut reservoir behaves as a privileged site for atmospheric recycling and in situ... |
| Tipo: Text |
Palavras-chave: Atmosphere; Estuary; Reservoir; French Guiana; Methylmercury; Mercury; Atmosphère; Estuaire; Retenue; Guyane française; Methylmercure; Mercure. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/these-1508.pdf |
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| Laurier, Fabien; Cossa, Daniel; Beucher, Charlotte; Breviere, Emily. |
| The Mussel Watch program conducted along the French coasts for the last 20 years indicates that the highest mercury concentrations in the soft tissue of the blue mussel (Mytilus edulis) occur in animals from the eastern part of Seine Bay on the south coast of the English Channel, the "Pays de Caux". This region is characterized by the presence of intertidal and submarine groundwater discharges, and no particular mercury effluent has been reported in its vicinity. Two groundwater emergence systems in the karstic coastal zone of the Pays de Caux (Etretat and Yport with slow and fast water percolation pathways respectively) were seasonally sampled to study mercury distribution, partitioning and speciation in water. Samples were also collected in the... |
| Tipo: Text |
Palavras-chave: Mussel; Estuaries; Groundwater seepage; Bioavailability; Speciation; Mercury. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-4704.pdf |
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| Muresan, B; Cossa, Daniel; Coquery, M; Richard, S. |
| The distribution, partition and speciation of mercury (Hg) were studied along the redox gradient of an anthropogenically perturbed tropical estuary, the Sinnamary Estuary in French Guiana. This system is a partially mixed estuary characterized by an anoxic freshwater end-member, while the marine end member consists of the Amazon Plume. The set up of an artificial oxygenation system in the anoxic freshwater end-member generates sharp gradients of major chemical species (iron, sulfides, etc.) coupled with intense organic matter (OM) turnover. The coexistence of oxygenated waters and dissolved sulfides in an organic rich environment depicts the Upper Sinnamary Estuary (USE: part of Sinnamary Estuary under the tidal influence but upstream of the salt... |
| Tipo: Text |
Palavras-chave: Partitioning; Speciation; Redox; Mercury; Reservoir; Estuary. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4223.pdf |
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| Briant, Nicolas; Chouvelon, Tiphaine; Martinez, Laura; Brach-papa, Christophe; Chiffoleau, Jean-francois; Savoye, N.; Sonke, J.; Knoery, Joel. |
| Marine mercury (Hg) concentrations have been monitored in the French coastline for the last half a century using bivalves. The analyses presented in this study concerned 192 samples of bivalves (mussels: Mytilus edulis and Mytilus galloprovincialis and oysters: Crassostrea gigas and Isognomon alatus) from 77 sampling stations along the French coast and in the French Antilles sea. The goals of this study were to assess MeHg levels in various common bivalves from French coastline, and to identify possible geographic, taxonomic or temporal variations of concentrations. We show that the evolution of methylmercury (MeHg) concentrations covary with total mercury (HgT) concentrations. Moreover, in most of the study sites, HgT concentrations have not decreased... |
| Tipo: Text |
Palavras-chave: Mercury; Methylmercury; France; Bivalves; Speciation. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00353/46465/46398.pdf |
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| Harmelin-vivien, Mireille; Bodiguel, Xavier; Charmasson, Sabine; Loizeau, Veronique; Mellon, Capucine; Tronczynski, Jacek; Cossa, Daniel. |
| Consumption of marine organisms represents one of the main exposure sources of contaminants for human populations. To obtain a global view of the contamination in commercial fish in the NW Mediterranean Sea, we analysed four types of priority contaminants (PCBs, PBDEs, Hg and Cs-137) in the European hake, Merluccius merluccius, from the Gulf of Lions in relation with organism's trophic level (delta N-15). All contaminants presented a significant increase in concentration in hake muscle with trophic level. However, obvious differences between contaminants were evidenced. Biomagnification factors (BMF and FWMF) along the hake food web were higher for Hg and CB-153 than for BDE-47 and Cs-137, and increase in contaminant concentration with trophic level... |
| Tipo: Text |
Palavras-chave: Persistent organic pollutants; Mercury; Cs-137; Merluccius merluccius; Mediterranean. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00085/19583/17484.pdf |
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| Muresan Paslaru, Bogdan; Cossa, Daniel; Richard, S; Burban, B. |
| The distribution and speciation of mercury (Hg) in air, rain, and surface waters from the artificial tropical lake of Petit-Saut in French Guiana were investigated during the 2003/04 period. In the air, total gaseous mercury (TGM) at the dam station averaged 12 +/- 2 pmol m(-3) of which > 98% was gaseous elemental mercury (GEM). GEM distribution depicted a day-night cycling with high concentrations (up to 15 pmol m(-3)) at dawn and low concentrations (down to 5 pmol m(-3)) at nightfall. Reactive gaseous mercury (RGM) represented < 1% of the GEM with a mean concentration of 4 3 fmol m(-3). Diel RGM variations were negatively related to GEM. In the rain, the sum of all Hg species in the unfiltered (HgTUNF) averaged 16 +/- 112 pmol L-1. Temporal... |
| Tipo: Text |
Palavras-chave: Fluxes; Speciation; Mercury; Artificial reservoir; Atmosphere. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3329.pdf |
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| Guedron, Stephane; Grimaldi, Michel; Grimaldi, Catherine; Cossa, Daniel; Tisserand, Delphine; Charlet, Laurent. |
| Total mercury (HgT) and monomethylmercury (MMHg) were investigated in a tropical head watershed (1 km(2)) of French Guiana. The watershed includes a pristine area on the hill slopes and a former gold mined flat in the bottomland. Concentrations of dissolved and particulate HgT and MMHg were measured in rain, throughfall, soil water and at three points along the stream. Samples were taken in-between and during 14 storm events at the beginning and middle of the 2005 and 2006 rainy seasons. Dissolved and particulate HgT concentrations in the stream slightly increased downstream, while dissolved and particulate MMHg concentrations were low at the pristine sub-watershed outlet (median = 0.006 ng L-1 and 1.84 ng g(-1), respectively) and sharply increased at the... |
| Tipo: Text |
Palavras-chave: Mercury; Methylmercury; Tropical watershed; Gold placers; Stream water; Oxisols; Hydromorphic soils. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00035/14628/12134.pdf |
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| Registros recuperados: 98 | |
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