Mercury concentration in six fish guilds from a floodplain lake in western Amazonia: Interaction between seasonality and feeding habits

Azevedo, Lucas Silva; Pestana, Inácio Abreu; Nery, Adriely Ferreira da Costa; Bastos, Wanderley Rodrigues; Souza, Cristina Maria Magalhães de

doi:10.1016/j.ecolind.2019.106056

Cited by 15 publications

(4 citation statements)

References 65 publications

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“…There are numerous physiological and ecological factors that might affect metal contamination and bioaccumulation in the marine environment: geographic location (Frodello and Marchand, 2001;Lewis and Devereux, 2009;Xia et al, 2019;Jarosz-Krzemińska et al, 2020;Lawson et al, 2021), feeding patterns (Azevedo et al, 2020), age and size of species (Mustafa and Guluzar, 2003;Farkas et al, 2003;Le Bourg et al, 2019), sex (Gewurtz et al, 2011;Jankovská et al, 2013), tissue type (Bilandžic et al, 2012;Al-Ansari et al, 2017) and metabolic rates (Caurant et al, 1996;Seco et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The concentration and biomagnification of trace metals and metalloids across four trophic levels in a marine food web

Madgett

Yates

Webster

et al. 2021

Marine Pollution Bulletin

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Section: Introductionmentioning

confidence: 99%

The concentration and biomagnification of trace metals and metalloids across four trophic levels in a marine food web

Madgett

Yates

Webster

et al. 2021

Marine Pollution Bulletin

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“…Our results revealed that the most serious situations of mercury contamination in fish were concentrated in Roraima, Rondônia, and Acre. As widely reported by various authors [ 28 , 32 , 33 , 34 ], the increase in illegal gold-mining activities in Roraima and Rondônia is directly related to the high levels of mercury detected in the fish from these regions.…”

Section: Discussionmentioning

confidence: 78%

“…Following this, the product of this multiplication was divided by the average total mercury concentration (µg/g) detected in different fish species. As there were regional preferences in fish consumption, as well as different levels of mercury accumulation depending on the diet of each fish species [ 27 , 28 ], consumption was standardized to an average of 50% carnivorous fish species and 50% noncarnivorous fish species.…”

Section: Methodsmentioning

confidence: 99%

Risk Assessment of Mercury-Contaminated Fish Consumption in the Brazilian Amazon: An Ecological Study

Basta,

de Vasconcellos,

Hallwass

et al. 2023

Toxics

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Mercury is one of the most dangerous contaminants on the planet. In recent years, evidence of mercury contamination in the Amazon has significantly increased, notably due to gold-mining activities. Although mercury contamination in fish has consistently been documented, little is known about the risk associated with fish consumption by populations in urban areas of the Amazon. We sampled 1010 fish sold in public markets in six state capitals and 11 additional cities. Mercury levels were determined for each specimen, and the evaluation of the health risks associated with consuming mercury-contaminated fish was conducted according to the methodology proposed by the World Health Organization (WHO). Our study reveals that more than one-fifth (21.3%) of the fish sold in urban centers had mercury levels above the safe limits (≥0.5 µg/g) established by the Brazilian Health Surveillance Agency (ANVISA). The prevalence of Hg contamination ≥0.5 µg/g was approximately 14 times higher in carnivorous than in noncarnivorous fish. The analysis of the risk attributable to fish consumption reveals that daily mercury intake exceeded the reference dose recommended by the U.S. EPA in all population groups analyzed, reaching up to 7 and 31 times in women of childbearing age and children from 2 to 4 years old, respectively. However, these risks are diverse depending on the type of fish consumed and must be considered to formulate appropriate nutritional guidelines for safe fish consumption by the local community.

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“…Details about the Madeira River's depth and flow during the sampling period can be found in Azevedo et al. (2020).…”

Section: Methodsmentioning

confidence: 99%

Do fish isotopic niches change in an Amazon floodplain lake over the hydrological regime?

Azevedo

Pestana

Almeida

et al. 2021

Ecology of Freshwater Fish

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Floodplain lakes are ecosystems characterised by annual flood and dry cycles. Fish ecology is influenced by the flood pulse due to the large influx of allochthonous food resources and diversification of habitats during the flood cycle, while during the dry cycle, fishes tend to be confined in reduced habitat. The aim of this study was to evaluate the seasonal variation in trophic niche width and overlap of four species—Mylossoma duriventre, Prochilodus nigricans, Cichla.pleiozona and Serrasalmus rhombeus—in an Amazonian floodplain lake. Stable isotope analyses were used to estimate trophic niche width and overlap during the flood and dry seasons. We hypothesised broader niche width for all species during the flood cycle and a higher degree of overlap between the two piscivorous fishes during the dry cycle. Isotopic niche width was 72% broader for P. nigricans, 61% for S. rhombeus and 54% for C. pleiozona during the dry cycle, which did not support our hypothesis. Core niche width overlaps were not observed between piscivorous species in either flood or dry cycle. The results indicate that seasonal variation in isotopic niche width is specific to feeding habit. Understanding how fish trophic ecology responds to changes in the hydrological regime during the seasons is crucial for sustainable fishery management in a region where many people rely heavily on fish for nutritional and economic purposes.

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Mercury concentration in six fish guilds from a floodplain lake in western Amazonia: Interaction between seasonality and feeding habits

Cited by 15 publications

References 65 publications

The concentration and biomagnification of trace metals and metalloids across four trophic levels in a marine food web

The concentration and biomagnification of trace metals and metalloids across four trophic levels in a marine food web

Risk Assessment of Mercury-Contaminated Fish Consumption in the Brazilian Amazon: An Ecological Study

Do fish isotopic niches change in an Amazon floodplain lake over the hydrological regime?

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