Total mercury concentration in the fur of free-ranging giant otters in a large Neotropical floodplain

Soresini, Grazielle Cristina Garcia; Silva, Fabiano Aguiar da; Leuchtenberger, Caroline; Mourão, Guilherme

doi:10.1016/j.envres.2020.110483

Cited by 9 publications

(7 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…High mercury concentrations in fish from Manu National Park (Peru) and the Tapajós River basin (Brazil) suggest that there is risk of mercury intoxication in giant otters (Gutleb, Schenck, & Staib, 1997;Uryu, Malm, Thornton, Payne, & Cleary, 2001). As confirmation, high mercury concentrations were found in the fur of giant otters from the southern Pantanal, approximately 475 km from gold mining activity (Soresini, da Silva, Leuchtenberger, & Mourão, 2020). Areas affected by gold mining have depleted fish populations and are also devoid of otters more than a decade after mining stopped (Groenendijk et al, 2015;Leuchtenberger et al, 2018).…”

Section: Energy Production and Miningmentioning

confidence: 95%

Conservation of Amazonian aquatic mammals

Brum

Rosas-Ribeiro

Amaral³

et al. 2021

Aquatic Conservation

View full text Add to dashboard Cite

Aquatic mammals worldwide are highly threatened in freshwater ecosystems where they are affected by direct human activities (e.g. hunting) as well as indirect human alteration of freshwater ecosystems (e.g. dams, mining activity). Although aquatic mammals of the Amazon Basin are experiencing many growing threats, little is known about the escalating impacts on them, current limitations in protection mechanisms, and possible strategies to ensure their conservation. This study synthesizes the available information on Amazonian aquatic mammals, including the ecological characteristics of these species, key threats, population status and conservation prospects. Amazonian aquatic mammals comprise seven species – Inia geoffrensis, Inia boliviensis, Inia araguaiaensis, Sotalia fluviatilis, Trichechus inunguis, Pteronura brasiliensis and Lontra longicaudis – which are characterized by low reproductive rates and keystone ecosystem roles. These species are endangered mainly by biological resource use, natural ecosystem modifications, energy production and mining, and climate change. Although information is sparse, there is evidence that these threats are inducing population declines of Inia spp., and hindering the recovery of populations of P. brasiliensis. Protection mechanisms for these species mostly include national and international laws and agreements, legislation governing environmental licensing and protected areas. Each of these protection mechanisms, however, has limited capacity to protect Amazonian aquatic mammals, largely because they are poorly enforced, lack transnational coordination or require population trend data that do not exist. Reversing the current state of affairs for Amazonian aquatic mammals requires an integrated research and policy approach that, at a minimum, substantially increases the present capacity to monitor their population responses to human impacts, establishes effective enforcement of existing legislation and prevents further impacts from hydropower development. To implement such an approach, information on the ecology of these species is necessary to create public and scientific awareness.

show abstract

Section: Energy Production and Miningmentioning

confidence: 95%

Conservation of Amazonian aquatic mammals

Brum

Rosas-Ribeiro

Amaral³

et al. 2021

Aquatic Conservation

View full text Add to dashboard Cite

show abstract

“…The authors also found a variety of other fish genera in P. brasiliensis prey spectrum, in addition to reptiles, insects, mollusks, and crustaceans, the last two consumed in high frequencies (Leuchtenberger et al 2020). Thus, it is possible that Hg sources which resulted in moderate Hg levels in P. brasiliensis matrices (Fonseca et al 2005;Soresini et al 2021) may not correspond to the fish species herein analyzed, but to other prey items explored by the carnivoran. Nevertheless, Soresini et al (2021) raise the possibility of widespread Hg contamination in fish and their predators in Pantanal due to anthropogenic sources such as mining activity and the use of pesticides in agricultural practices.…”

Section: Elements Occurrence and Concentrations: As CD Hg And Pbmentioning

confidence: 99%

“…Thus, it is possible that Hg sources which resulted in moderate Hg levels in P. brasiliensis matrices (Fonseca et al 2005;Soresini et al 2021) may not correspond to the fish species herein analyzed, but to other prey items explored by the carnivoran. Nevertheless, Soresini et al (2021) raise the possibility of widespread Hg contamination in fish and their predators in Pantanal due to anthropogenic sources such as mining activity and the use of pesticides in agricultural practices. Ongoing sampling and analyses on Hg from other fish species from middle MRB will bring new data for the patterns of Hg distribution in the local ichthyofauna.…”

Section: Elements Occurrence and Concentrations: As CD Hg And Pbmentioning

confidence: 99%

“…Fonseca et al (2005) determined the total Hg levels in hair, kidney, liver, and muscle of two giant otter Pteronura brasiliensis individuals from Negro Riversouthern Pantanal -, obtaining concentrations varying from 0.17 to 4.59 μg/g. Soresini et al (2021) Despite the high importance of Miranda River for the subsistence of local riverine communities and the economic development associated with fisheries, no study concerning contaminants in edible fish has been conducted to date. Herein we investigated the concentrations of arsenic (As), silver (Ag), aluminum (Al), barium (Ba), chromium (Cr), copper (Cu), iron (Fe), mercury (Hg) manganese (Mn), lead (Pb), selenium (Se) and zinc (Zn) in six fish species with distinct feeding habits highly consumed in a highly exploited middle Miranda River, especially by the local communities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Essential and non-essential elements levels in fish species highly consumed in the middle Miranda River, Brazilian Pantanal

Quintela,

Silva,

Correa

et al. 2023

Preprint

View full text Add to dashboard Cite

The Miranda River basin spreads over about 40.000 km² and consists of one of the central systems acting in the Pantanal flooding regime in the upper Paraguay River basin. The middle Miranda River has great socioeconomic importance as a source of fishery resources highly exploited by riverine communities, in addition to sustaining very significant fishing tourism in southern Pantanal. The present study investigated the levels of As, Ag, Al, Ba, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se, and Zn in muscle samples of six fish species (Pygocentrus nattereri, Serrasalmus marginatus, Mylossoma duriventre, Leporinus friderici, Pimelodus argenteus, and P. pantaneiro) highly consumed by local riverine and non-resident people in a highly exploited stretch of middle Miranda River. Interspecific significant differences were detected for Ba, Fe, Mn, and Zn levels. However, these seem unrelated to species' feeding habits once pairwise comparison detected significant differences in element levels between species with similar diets. Significant correlations between body size and concentrations were found for Ba in P. nattereri (moderate positive correlation), and for Mn in M. duriventre (weak positive correlation) and P. argenteus (moderate negative correlation). Levels exceeding tolerable daily intake (TDI) were found for Pb maximum concentrations in P. nattereri, M. duriventre, L. friderici, P. argenteus, and P. pantaneiro, and for Cd maximum concentration in P. argenteus. Adopting a Pb monitoring program in biotic and abiotic compartments in Miranda River is strongly recommended.

show abstract

“…Há muito tempo a literatura vem reportando os impactos ambientais significativos gerado pelo mercúrio em uma variedade de ecossistemas, inclusive em áreas úmidas como o Pantanal brasileiro (HYLANDER et al, 1994(HYLANDER et al, , 2000aJUNK 2001;LACERDA;FITZGERALD 2001;LEADY;GOTTGENS 2001;FONSECA;MALM;WALDEMARIN, 2005;VIEIRA et al, 2011;SABINO 2012;LÁZARO et al, 2015;SORESINI et al, 2020), sendo determinado em espécies de moluscos (VIEIRA; ALHO; FERREIRA, 1995), peixes (ALHO; VIEIRA, 1997 ;HYLANDER et al, 2000b;KUNO, 2003 ) DE ALMEIDA FERREIRA et al, 2017;HYLANDER et al, 2000;RIVEROS et al, 2021). Dessa forma, se seu habitat continuar a ser perdido e as populações ficarem isoladas, as quantidades de metais pesados como o mercúrio podem, com o tempo, afetar a reprodução não só da onça-pintada, como de outros animais da região, além de afetar a população ribeirinha (MOWBRAY, 2017).…”

Section: Indicador Qualidade E Quantidade Das áGuasunclassified

Avaliação de efeitos ambientais cumulativos na Bacia do Alto Paraguai: uma abordagem estratégica

Andrade¹

View full text Add to dashboard Cite

Agradeço a Deus e a São José por estarem comigo em todos os momentos desta jornada, tanto na dor quanto na alegria.À minha família, pelo incentivo na vida acadêmica, que mesmo de longe e às vezes não entendendo as minhas escolhas, torceram pelo meu sucesso e felicidade.Ao meu companheiro de vida, Marcel, por todo o apoio, suporte e amizade durante estes anos de doutorado. Este título também é seu! E também aos meus sogros, por todo o incentivo depositado até aqui.Agradeço ao meu orientador Marcelo Montaño (Mindu) pela orientação e motivação durante esta caminhada.Aos meus amigos do grupo de oração GPP Filhos do Amor, principalmente pelas partilhas, orações, descontrações, aprendizados e companheirismo nos momentos vividos em São Carlos.Aos amigos queridos que fiz no NEPA pelas trocas, compartilhamento de experiências e aprendizados, em especial Diana,

show abstract

Total mercury concentration in the fur of free-ranging giant otters in a large Neotropical floodplain

Cited by 9 publications

References 54 publications

Conservation of Amazonian aquatic mammals

Conservation of Amazonian aquatic mammals

Essential and non-essential elements levels in fish species highly consumed in the middle Miranda River, Brazilian Pantanal

Avaliação de efeitos ambientais cumulativos na Bacia do Alto Paraguai: uma abordagem estratégica

Contact Info

Product

Resources

About