Mercury in fish of the Madeira river (temporal and spatial assessment), Brazilian Amazon

Bastos, Wanderley Rodrigues; Dórea, José G.; Bernardi, José Vicente Elias; Lauthartte, Leidiane Caroline; Mussy, Marília Higino; Lacerda, Luiz Drude de; Malm, Olaf

doi:10.1016/j.envres.2015.03.029

Cited by 82 publications

(64 citation statements)

References 39 publications

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“…δ 15 N becomes more enriched with each subsequent trophic position. Higher Hg fish in Tambopata River were unexpected given their lower δ 15 N because lower trophic levels fish tend to have lower Hg concentrations [27,28,33,63]. Mean δ 13 C was most depleted in Heath River throughout both seasons (−33.2 ± 3.6‰), followed by Malinowski (−29.8 ± 2.3‰) and Tambopata (−28.4 ± 3.6‰) rivers.…”

Section: Discussionmentioning

confidence: 99%

Mercury Contamination in Riverine Sediments and Fish Associated with Artisanal and Small-Scale Gold Mining in Madre de Dios, Peru

Martinez

McCord

Driscoll

et al. 2018

IJERPH

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Artisanal and small-scale gold mining (ASGM) in Madre de Dios, Peru, continues to expand rapidly, raising concerns about increases in loading of mercury (Hg) to the environment. We measured physicochemical parameters in water and sampled and analyzed sediments and fish from multiple sites along one ASGM-impacted river and two unimpacted rivers in the region to examine whether Hg concentrations were elevated and possibly related to ASGM activity. We also analyzed the 308 fish samples, representing 36 species, for stable isotopes (δ15N and δ13C) to estimate their trophic position. Trophic position was positively correlated with the log-transformed Hg concentrations in fish among all sites. There was a lack of relationship between Hg concentrations in fish and either Hg concentrations in sediments or ASGM activity among sites, suggesting that fish Hg concentrations alone is not an ideal bioindicator of site-specific Hg contamination in the region. Fish Hg concentrations were not elevated in the ASGM-impacted river relative to the other two rivers; however, sediment Hg concentrations were highest in the ASGM-impacted river. Degraded habitat conditions and commensurate shifts in fish species and ecological processes may influence Hg bioaccumulation in the ASGM-impacted river. More research is needed on food web dynamics in the region to elucidate any effects caused by ASGM, especially through feeding relationships and food sources.

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Section: Discussionmentioning

confidence: 99%

Mercury Contamination in Riverine Sediments and Fish Associated with Artisanal and Small-Scale Gold Mining in Madre de Dios, Peru

Martinez

McCord

Driscoll

et al. 2018

IJERPH

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“…While considerable attention has been paid to the occurrence and health effects of these contaminants in sub-polar and polar regions due to their potential to act as final sink Tartu et al, 2015bTartu et al, , 2016, comparatively less attention has been given to wildlife from other geographical regions (Bastos et al, 2015;Costantini et al, 2017;De Andres et al, 2016;Frery et al, 2001), especially in South America (De Andres et al, 2016;Guirlet et al, 2010;Sebastiano et al, 2016). This is surprising because local releases of contaminants (e.g.…”

Section: Introductionmentioning

confidence: 99%

Trophic ecology drives contaminant concentrations within a tropical seabird community

Sebastiano

Bustamante

Eulaers

et al. 2017

Environmental Pollution

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Fernandez, et al.. Trophic ecology drives contaminant concentrations within a tropical seabird community. Environmental Pollution, Elsevier, 2017Elsevier, , 227, pp.183 -193. <10.1016Elsevier, /j.envpol.2017 Hg concentration in several adults Laughing gulls Leucophaeus atricilla and Royal ternsThalasseus maximus, and in all Magnificent frigatebirds was similar or higher than that of high contaminated seabird populations. Furthermore, nestling red blood cells also contained Hg concentrations of concern, and further studies should investigate its potential health impact in this seabird community. Differences in adult trophic ecology of the six species explained interspecific variation in exposure to trace element and POPs, while nestling trophic ecology provides indications about the diverse feeding strategies adopted by the six species, with the consequent variation in exposure to contaminants.

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“…La alimentación de los peces no solo depende de la disponibilidad de los alimentos en los diversos ambientes acuáticos donde se encuentran, sino también de la capacidad que tienen para capturar y aprovechar estos alimentos (Pouilly et al, 2003). Además, la dieta de los peces podría estar influenciada por las inundaciones anuales características de los ríos amazónicos, que varía de un lugar a otro y entre años (Bastos et al, 2015). En tanto, la variedad de ítems que presenta la mota podría estar relacionada por su hábito oportunista, por presentar un apetito insaciable y por tener poca selectividad al momento de alimentarse, ya que también consume restos de animales muertos y peces (Agudelo et al, 2000;Santos et al, 2006).…”

Section: Pesca De La Motaunclassified

“…Esta actividad considerada ilegal tiene implicancia ambiental y social, ya que se llega a sacrificar aproximadamente 1000 delfines al año, para una captura anual promedio de 140 toneladas de mota (Gómez et al, 2008). Llegando a caracterizar a esta pesca como predatoria y con una fuerte amenaza ambiental (Botero-Arias et al, 2014) y social debido a que actualmente, existe un riesgo para la salud de la población que lo consume, por ser una de las especies en la que se encontraron los niveles más altos de mercurio, lo cual posiblemente esté relacionado con sus hábitos de alimentación (carnívoro) (Bastos et al, 2015). Un estudio realizado en tres sectores de la Amazonía evidencia estas altas concentraciones de mercurio total en la especie, mayor a lo establecido por la Organización Mundial de la Salud (0,5 mg/kg), alcanzando en Leticia-Amazonas (1,66 mg/kg), Inírida-Guaninía (1,47 mg/kg) y Bogota (1,05 mg/kg) (Mosquera-Guerra et al, 2015).…”

Section: Introductionunclassified

ALIMENTACIÓN NATURAL DE LA MOTA Calophysus macropterus (Lichtenstein, 1819), EN AMBIENTES DE LA AMAZONÍA PERUANA

et al. 2017

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El presente estudio tuvo como objetivo generar información sobre la diversidad de ítems alimenticios de la mota Calophysus macropterus provenientes de ambientes naturales. Se colectaron y analizaron 543 estómagos de individuos capturados en los ríos Amazonas, Napo, Tigre y Ucayali. Los contenidos estomacales fueron analizados usando el método modificado de los puntos. Se identificaron cuatro ítems alimenticios en la dieta de la mota, peces (47%), semillas, frutos y restos de vegetales (37%) fueron los más representativos, los crustáceos estuvieron presentes en menor proporción (15%) y los insectos fueron los menos representativos (1%). El ítem peces estuvo conformado por restos de peces del orden Siluriformes, Characiformes, Perciformes y Beloniformes. El ítem vegetal estuvo conformado por semillas de árboles de Cecropia y frutos de Ficus sp. En este estudio se observó que no existe diferencia significativa de los ítems alimenticios consumidos durante los períodos hidrológicos de creciente y transición a creciente de los ríos. En relación al sexo nuestros resultados muestran que los individuos machos de C. macropterus, probablemente sean los que desempeñan un rol más eficiente como dispersores de semilla ya que el consumo de estas es alto en relación a las hembras.

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Mercury in fish of the Madeira river (temporal and spatial assessment), Brazilian Amazon

Cited by 82 publications

References 39 publications

Mercury Contamination in Riverine Sediments and Fish Associated with Artisanal and Small-Scale Gold Mining in Madre de Dios, Peru

Mercury Contamination in Riverine Sediments and Fish Associated with Artisanal and Small-Scale Gold Mining in Madre de Dios, Peru

Trophic ecology drives contaminant concentrations within a tropical seabird community

ALIMENTACIÓN NATURAL DE LA MOTA Calophysus macropterus (Lichtenstein, 1819), EN AMBIENTES DE LA AMAZONÍA PERUANA

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