Temporal trends of mercury, organochlorines and PCBs in northern gannet ( Morus bassanus ) eggs from Bonaventure Island, Gulf of St. Lawrence, 1969–2009

Champoux, Louise; Rail, Jean‐François; Lavoie, Richard; Hobson, Keith A.

doi:10.1016/j.envpol.2014.10.030

Cited by 14 publications

(3 citation statements)

References 49 publications

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“…Thus, Hg concentrations in fish and other components of aquatic food webs may not reflect background Hg loading if environmental conditions are not conducive to microbial Hg methylation. For example, Hg concentrations in fish and aquatic birds have displayed a range of trends in temporal variation since the 1960s, including increases (Drevnick et al, 2015;Vo et al, 2011), decreases (Champoux et al, 2015;Cross et al, 2015), and more variable and complex patterns, such as trend reversals (Gandhi et al, 2014;Monson, 2009), yet there has been approximately a 2-4 fold decrease in net atmospheric deposition since its peak at that time (Beal et al, 2015). Although more recent deposition trends are variable and even increasing in some cases (Weiss-Penzias et al, 2016), the linkage with fish Hg concentrations is thus far equivocal.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada

Eagles‐Smith

Ackerman

Willacker

et al. 2016

Science of The Total Environment

138

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Methylmercury contamination of fish is a global threat to environmental health. Mercury (Hg) monitoring programs are valuable for generating data that can be compiled for spatially broad syntheses to identify emergent ecosystem properties that influence fish Hg bioaccumulation. Fish total Hg (THg) concentrations were evaluated across the Western United States (US) and Canada, a region defined by extreme gradients in habitat structure and water management. A database was compiled with THg concentrations in 96,310 fish that comprised 206 species from 4262 locations, and used to evaluate the spatial distribution of fish THg across the region and effects of species, foraging guilds, habitats, and ecoregions. Areas of elevated THg exposure were identified by developing a relativized estimate of fish mercury concentrations at a watershed scale that accounted for the variability associated with fish species, fish size, and site effects. THg concentrations in fish muscle ranged between 0.001 and 28.4 (μg/g wet weight (ww)) with a geometric mean of 0.17. Overall, 30% of individual fish samples and 17% of means by location exceeded the 0.30μg/g ww US EPA fish tissue criterion. Fish THg concentrations differed among habitat types, with riverine habitats consistently higher than lacustrine habitats. Importantly, fish THg concentrations were not correlated with sediment THg concentrations at a watershed scale, but were weakly correlated with sediment MeHg concentrations, suggesting that factors influencing MeHg production may be more important than inorganic Hg loading for determining fish MeHg exposure. There was large heterogeneity in fish THg concentrations across the landscape; THg concentrations were generally higher in semi-arid and arid regions such as the Great Basin and Desert Southwest, than in temperate forests. Results suggest that fish mercury exposure is widespread throughout Western US and Canada, and that species, habitat type, and region play an important role in influencing ecological risk of mercury in aquatic ecosystems.

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Section: Introductionmentioning

confidence: 99%

Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada

Eagles‐Smith

Ackerman

Willacker

et al. 2016

Science of The Total Environment

138

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“…Eggs accumulate different contaminants such as dioxin, PCB, pesticides, and heavy metals like mercury, , predominantly in the yolk. In this study total Ag was also selectively found in yolk and not in albumen.…”

Section: Resultsmentioning

confidence: 99%

Transfer Study of Silver Nanoparticles in Poultry Production

Gallocchio

Biancotto

Cibin

et al. 2017

J. Agric. Food Chem.

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Silver nanoparticles (AgNPs) are of interest due to their antimicrobial activity and are seen as potential candidates to replace antibiotics in animal husbandry. A few studies have focused on this new application, but they lack any considerations about residual accumulation of AgNPs in edible animal tissues and animal products. In this research, a 22 day in vivo study was carried out by oral administration of 20 nm spherical PVP coated AgNPs to hens. Six doses of approximately 1 mg kg of AgNPs-PVP each were administered to animals throughout the experimentation. Atomic absorption spectroscopy (AAS) was used for quantitative determination of residual total Ag in different organs and matrices. The analyses showed that Ag accumulates in livers (concentration ranging from 141 μg kg to 269 μg kg) and yolks (concentration ranging from 20 μg kg to 49 μg kg) but not in muscles, kidneys, and albumen belonging to hens of the treated group (tG2). Ag was not detected in animals of the control group (uG1) (i.e., total Ag < LOD = 10 μg kg). Single particle inductively coupled plasma mass spectrometry (spICP-MS) and scanning electron microscopy with energy dispersive X-ray detection (SEM-EDX) were employed to elucidate the presence of AgNPs in livers and yolks belonging to tG2 animals. spICP-MS highlighted that part of residual Ag found in livers (about 5-20%) is in NP form with an average dimension of approximately 20 nm. SEM-EDX technique confirmed the presence of AgNPs only in livers of treated animals. The results show that feeding AgNPs to hens may become a source of consumer exposure to AgNPs. As far as we know this is the first study showing transfer of AgNPs or reaction products thereof from animal feed to animal products.

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“…Su movilidad en los ecosistemas, el nivel trófico que ocupan, además del uso de hábitats agrícolas, puede resultar en una alta exposición a contaminantes ambientales persistentes, incluyendo los COPs, los bifenilos policlorados (BPC's), los metales y los metaloides (Berny et al, 2002;Fasola, Movalli & Gandini, 1998). Es por ello que las aves acuáticas son utilizadas como bioindicadores de la salud de los ecosistemas y por su consecuente capacidad de bioacumulación (Fasola et al, 1998;Bekhit et al, 2011;Champoux, Rail, Lavoie & Hobson, 2015).…”

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Presencia de Compuestos Orgánicos Persistentes (COPs) en huevos de garzas y espátulas rosadas de la Laguna El Tóbari, Sonora, México

Aguilera-Márquez,

Bastidas-Bastidas,

Leyva-García

et al. 2024

TIP RECQB

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El presente trabajo se realizó en el Valle del Yaqui, Sonora, México, con la finalidad de evaluar el efecto de la contaminación agrícola en las aves del ecosistema lagunar El Tóbari, ubicado al sur del estado (27°04’40.01’’N, 110°00’06.66’’O). Este ecosistema recibe drenes agrícolas del Valle del Yaqui y es hábitat de especies de aves reproductivas de colonia, dentro de las cuales se encuentran la Espátula Rosada (Platalea ajaja), la Garcita Dedos Dorados (Egretta thula), el Garzón Gris (Ardea herodias), la Garza Rojiza (Egretta rufescens), y el Pedrete Corona Clara (Nyctanasa violacea). Para el efecto, se colectaron un total de 30 huevos de estas 5 especies, en el periodo comprendido de los años de 2010-2012. Los huevos se pesaron y se les midió la longitud, el ancho, el grosor del cascarón y se calculó el índice de tamaño y el volumen. En el contenido y en el cascarón de cada huevo, se cuantificaron 17 plaguicidas organoclorados incluyendo el DDT y sus metabolitos. Como resultado se tiene que el 4,4’-DDE se detectó en 100% de las muestras, con concentraciones que variaron entre 0.16 y 17.86 µg/g peso húmedo (mediana = 2.17 µg/g); por lo contrario α-BHC, β-BHC, heptacloro epóxido, 4,4’-DDD y 4,4’-DDT se presentaron con menor frecuencia y los valores máximos de 0.09 µg/g y mínimos de 0.004 µg/g peso húmedo. En el cascarón se encontraron el β-BHC, heptacloro, endrín aldheído y el 4,4’-DDE, este último en el cascarón de la Garza Rojiza y del Garzón Gris con medianas de 2.54 y 1.23 µg/g, respectivamente. Un 30% del total de las muestras excedieron el límite de 4 µg/g de concentración de 4,4’-DDE, con efectos dañinos en la reproducción de especies similares, es así, que el 55% de las muestras del Garzón Gris rebasaron el límite, seguido de la Espátula Rosada (37%), la Garza Rojiza (25%) y la Garcita Dedos Dorados (12%). Esta última especie fue la única que presentó una correlación negativa entre la concentraciones de 4,4’-DDE y el grosor del cascarón.

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Temporal trends of mercury, organochlorines and PCBs in northern gannet ( Morus bassanus ) eggs from Bonaventure Island, Gulf of St. Lawrence, 1969–2009

Cited by 14 publications

References 49 publications

Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada

Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada

Transfer Study of Silver Nanoparticles in Poultry Production

Presencia de Compuestos Orgánicos Persistentes (COPs) en huevos de garzas y espátulas rosadas de la Laguna El Tóbari, Sonora, México

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