Use of Cathorops spixii as bioindicator of pollution of trace metals in the Santos Bay, Brazil

Azevedo, Juliana de Souza; Fernandez, Wellington Silva; Farias, Luciana Aparecida; Fávaro, D. T. I.; Braga, Elisabete S.

doi:10.1007/s10646-009-0315-4

Cited by 56 publications

(45 citation statements)

References 37 publications

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“…Considering that the main initial efforts and the fishing strategy were focused on Cathoropsspixii in accord with previous studies [13,14], the associated fauna was dealt with , in the present research, in such a way as to optimize the capture and to increase the knowledge of the effects of pollution in the fish of both estuarine systems.…”

Section: Fish Sampling and Preparation Of Biological Materialsmentioning

confidence: 96%

“…The Ariidae catfish, Cathoropsspixii, has been validated as a bioindicator species for exposure to metals in natural aquatic ecosystems such as estuarine systems [13,14] and the genotoxic effects in this fish submitted to different degrees of anthropogenic influence has been observed [15]. Taking into account the potential damage to environmental conditions, no target species were pre-defined in this present study, instead all the species caught, with the exception of Cathoropsspixii (catfish) -the focus of another study [13,16] -were investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Taking into account the potential damage to environmental conditions, no target species were pre-defined in this present study, instead all the species caught, with the exception of Cathoropsspixii (catfish) -the focus of another study [13,16] -were investigated.…”

Section: Introductionmentioning

confidence: 99%

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Trace Elements and Nuclear Abnormalities in Fish Species of Two Brazilianestuarine Regions – An Attempt to Increase the Matrix for Environmental Monitoring

ES¹

2017

JAMB

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Trace elements As, Co, Fe, Hg, Se, Zn and Cr were determined in muscle tissue, gills and liver and nuclear abnormalities in erythrocytes (NAEs) were observed in 7 fish species (Chaetodipterusfaber, Paralanchurusbrasiliensis, Micropogoniasfurnieri, Achiruslineatus, Genyatremusluteus, Menticirrhus Americanos and Micropogoniasfurnieri), from two estuarine regions subject to different levels of anthropogenic impact (preserved and polluted) to provide information on contamination levels. The bioaccumulation in C. faber suggested that it should be proposed as a bioindicator of pollution in estuaries. The hydrological data: temperature, salinity and dissolved oxygen characterized the estuarine waters. A paradoxical result relating to As, Co, Fe and Zn concentrations was that, in general, these were higher in the fish species of the Cananeia estuary (a preserved area), while Hg concentrations and NAEs were higher in the species of the Santos-São Vicente estuary (SSV) (the polluted area). The bioaccumulation in tissue-organs decreased in the following order: liver>gill>muscle, with the exception of Hg that was liver>muscle with no detection in gills. Concerning the genotoxic effects, C. faber showed a more significant NAE, besides clastogenic effects, demonstrated by the greater frequency of micronuclei. Differences found between the fish species could be related to their feeding habits and to salinity. This is a contribution to making fishery efforts more profitable and enhancing the bioindicator bank.

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Section: Fish Sampling and Preparation Of Biological Materialsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Trace Elements and Nuclear Abnormalities in Fish Species of Two Brazilianestuarine Regions – An Attempt to Increase the Matrix for Environmental Monitoring

ES¹

2017

JAMB

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“…In tropical vertebrates lower mercury concentrations are found in primary consumers such as the manatee ( Trichechus spp.) (Stavros et al 2008), low to moderate mercury concentrations in sea turtles (Day et al, 2010; Páez-Osuna et al, 2011) and many fish such as catfish species ( Cathorops spixii ; Azevedo et al, 2009; Barbosa-Cintra, 2010), and the highest mercury concentrations in upper trophic level species or apex predators.…”

Section: The Consumers At Riskmentioning

confidence: 99%

Mercury in tropical and subtropical coastal environments

Costa

Landing

Kehrig

et al. 2012

Environmental Research

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Anthropogenic activities influence the biogeochemical cycles of mercury, both qualitatively and quantitatively, on a global scale from sources to sinks. Anthropogenic processes that alter the temporal and spatial patterns of sources and cycling processes are changing the impacts of mercury contamination on aquatic biota and humans. Human exposure to mercury is dominated by the consumption of fish and products from aquaculture operations. The risk to society and to ecosystems from mercury contamination is growing, and it is important to monitor these expanding risks. However, the extent and manner to which anthropogenic activities will alter mercury sources and biogeochemical cycling in tropical and sub-tropical coastal environments is poorly understood. Factors as (1) lack of reliable local/regional data; (2) rapidly changing environmental conditions; (3) governmental priorities and; (4) technical actions from supra-national institutions, are some of the obstacles to overcome in mercury cycling research and policy formulation. In the tropics and sub-tropics, research on mercury in the environment is moving from an exploratory “inventory” phase towards more process-oriented studies. Addressing biodiversity conservation and human health issues related to mercury contamination of river basins and tropical coastal environments are an integral part of paragraph 221 paragraph of the United Nations document “The Future We Want” issued in Rio de Janeiro in June 2012.

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“…Taking into consideration that the concentrations of both metallic ions in these estuarine environments are very low (in the range of nmol L À1 for Zn(II) [30][31][32] and 0.1 nmol L À1 for Cd(II) [31]), no interference from the formation of alloys into the bismuth film is expected to occur by using the proposed sensor.…”

mentioning

confidence: 99%

Determination of Dissolved Zn(II) and Cd(II) in Estuarine Water by Using a Bismuth Film Microelectrode

Souza¹,

Salles²,

Braga³

et al. 2011

Electroanalysis

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A bismuth-film electrode was employed to quantify Cd(II) and Zn(II) in estuarine water samples by anodic stripping voltammetry. The bismuth film was deposited in situ simultaneously with the analytes onto a carbon fibre disc microelectrode (radius = 3 mm). Under the optimised conditions, calibration plots for both metallic ions were obtained in the range from 0.5 to 10.0 nmol L À1 and the limits of detection for Cd(II) and Zn(II) were estimated as 0.03 and 0.8 nmol L À1 , respectively. The accuracy of the results supplied by the bismuth film microelectrode (BiFME) was assessed by performing addition-recovery experiments and by comparing values with those obtained with a certified sample. The usefulness of the methodology was demonstrated by applying the BiFME to measuring the Cd(II) and Zn(II) content in estuarine water. The determination of metallic ions at very low levels and the continuous monitoring of the concentration of these bioavailable ions in estuarine water are extremely important. The quantification of heavy metals along the water system requires the use of sensitive analytical techniques, hence allowing the recognition and the distinction between the concentrations determined for the assessment of environmental quality. The methods routinely used in environmental studies depend mainly on spectroscopic measurements, which sometimes do not allow the quantification of trace concentrations. On the other hand, the determination of metallic ions at low levels can be conveniently performed by using electroanalytical techniques, especially when preconcentration strategies (stripping methods) are used to enhance the sensitivity of the measurements [1]. If experiments are carried out with microelectrodes, lower detection limits can be obtained owing to the enhanced mass-transport regime and reduced capacitive effects [2,3]. Moreover, the precision of the measurements is greatly increased as solution stirring is unnecessary during the pre-concentration step. This approach is very useful for the determination of metals in oceanic systems, as natural levels of heavy metals are in the order of nmol L À1

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Use of Cathorops spixii as bioindicator of pollution of trace metals in the Santos Bay, Brazil

Cited by 56 publications

References 37 publications

Trace Elements and Nuclear Abnormalities in Fish Species of Two Brazilianestuarine Regions – An Attempt to Increase the Matrix for Environmental Monitoring

Trace Elements and Nuclear Abnormalities in Fish Species of Two Brazilianestuarine Regions – An Attempt to Increase the Matrix for Environmental Monitoring

Mercury in tropical and subtropical coastal environments

Determination of Dissolved Zn(II) and Cd(II) in Estuarine Water by Using a Bismuth Film Microelectrode

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