First genotoxicity assessment of marine environment in Qatar using the local Pearl oyster Pinctada radiata

Leitão, Alexandra; Al‐Shaikh, Ismail; Hassan, Hassan; Ben-Hamadou, Radhouan; Bach, Steffen

doi:10.1016/j.rsma.2017.02.001

Cited by 9 publications

(6 citation statements)

References 52 publications

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“…radiata sampled from within Qatari ports when compared to oysters collected from sites with less anthropogenic activity. High concentrations of mercury and PAHs positively correlated with the recorded higher levels of aneuploidy at the sites studied (Leitão et al, 2017). Genomic resources are now starting to be made publicly for some of the key sentinel species used in the Gulf, including P.i.…”

Section: Cellular Biochemical and Histological Biomarkersmentioning

confidence: 85%

“…Data indicated the suitability of the assays employed for determining site differences in genotoxic contaminant exposure and provides useful baseline data for the region (Farhadi et al, 2011). The pearl oyster, Pinctada imbricata radiata has also been used in chemical led monitoring programs across the Gulf (de Mora et al, 2004(de Mora et al, , 2010 and studies have demonstrated their suitability as a sentinel species when assessing genotoxic endpoints of chemical exposure (Leitão et al, 2017). Using cytogenetic markers the rate of aneuploidy (abnormal diploid chromosomal number) in gill tissue were shown to be higher in samples of P.i.…”

Section: Cellular Biochemical and Histological Biomarkersmentioning

confidence: 99%

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The biological effects of chemical contaminants in the Arabian/Persian Gulf: A review

Khatir

Leitão

Lyons

2020

Regional Studies in Marine Science

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The Arabian Gulf is a shallow sea naturally exposed to extreme conditions of temperature and salinity due to its location, semi-enclosed nature, bathymetry and restricted circulation. Compared to open marine systems, the added stress imposed by pollutants is likely to have additional adverse consequences. Maintaining good marine environmental quality is crucial for several socioeconomic reasons, one of the most important being that the region relies heavily on seawater as a source of freshwater through desalination. While regionally based marine monitoring programs employing chemical endpoints have been widely deployed, few have evaluated the potential biological effects of those contaminants detected. However, it is now widely recognized that an integrated approach using both chemical measurements and appropriate biological endpoints in key sentinel species is essential to the design and implementation of marine environmental programs. Here we present an exhaustive review of the studies published so far in the Gulf on the biological effects of chemical contaminants using different biological endpoints and suggest potential areas requiring additional research.

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Section: Cellular Biochemical and Histological Biomarkersmentioning

confidence: 85%

Section: Cellular Biochemical and Histological Biomarkersmentioning

confidence: 99%

The biological effects of chemical contaminants in the Arabian/Persian Gulf: A review

Khatir

Leitão

Lyons

2020

Regional Studies in Marine Science

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“…Within marine animals, there has been genotoxicity studies on dolphins and fish [25,26] among others, with less data available on invertebrates. Recently, Leitão and colleagues [27] assessed the effect of some selected contaminants on the pearl oyster Pinctada radiata and reported Hg as being highly positively correlated to aneuploidy (abnormal number of chromosomes).…”

Section: Introductionmentioning

confidence: 99%

Methylmercury, Trace Metals, Organotins and Their Effects on the Qatari Mangrove Shrimp, Palaemon khori

Hassan

Benvenuto

Al-Maslamani

et al. 2022

JMSE

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The Qatari mangroves of Al-Khor are being increasingly exposed to a wide variety of anthropogenic pollutants due to land reclamation and urban expansion. In this study, we evaluated the lethal and genotoxic effects of methylmercury, trace metals, and organotins, assessing mortality and aneuploidy levels (abnormal number of chromosomes) in the endemic shrimp Palaemon khori under laboratory conditions. In the experimental design, two different concentrations were used for each family of contaminant (single or combined): an environmental concentration equivalent to the maximum value reported in the environment and a value ten times higher, for a period of eight weeks. Survival decreased significantly when pollutants were administrated in combination, even at environmental concentrations (as shown by Cox proportional hazards ratios): similar levels of mortality would be reached by individual type of pollutants only at ten times the environmental concentration. This critical result, under controlled lab conditions, highlights the importance of monitoring mixtures of contaminant types over single ones in the marine environment. Aneuploidy was reported in all treatments and control ranging from 5% to 19% at week four and from 7% to 21% at week eight. All treatments presented significantly higher aneuploidy levels when compared to the control. However, no significant difference was observed between the two time periods, even though 30% of the treatments could not be assessed at week eight, as not enough animals were still alive. In conclusion, the use of endemic species should be considered a valuable tool to determine local perturbations, representing a regional bioindicator of multiple environmental stressors from the initial stages of contamination.

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“…PAHs are toxic, bioactive and carcinogenic, mutagenic and ubiquitous environmental compounds composed of 2-7 fused aromatic rings derived from pyrogenic, petrogenic and biogenic sources (Ke et al 2017; Wang et al 2018;Akhbarizadeh et al 2019). These large group are different in degrees of resistance to degradation and persistence, tending to be accumulated in marine biota because of their high hydrophobic and lipophilic properties ( Leitão et al 2017; Sarkar et al, 2017;Lima et al, 2018;Akhbarizadeh et al, 2019) due to their toxicity and prevalent environmental existence and readily cumulating by biota (Neff and Anderson 1981), 16 PAHs have seen on the US EPA priority pollutant list (US EPA 2009). Phenanthrene (PHE), an important 3-ring component of crude oil and a representative from the US-EPA priority pollutant list, as a consequence of anthropological activities (US EPA, 2009), is one of the most abundant aquatic PAH.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Global Warming and Acidification on PAHs Bioaccumulation in Pearl Oyster Pinctada Radiate

Jafari

Naeemi

Noorinezhad³

et al. 2021

Preprint

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Warming and acidification are expected impact of climate change that will affect marine areas in the future. These areas are, furthermore, vulnerable to strong anthropogenic stresses such as chemical pollutants. Nevertheless, the consequences of both stressors for marine ecosystems and organisms are still unidentified. The present study aims to examine, for the first time, the effect of temperature and CO2 pressure increase on bioaccumulation of phenanthrene as a PAHs model in four tissues, gills, digestive gland, muscle and mantle of a commercially important pearl oyster Pinctada radiata. Oysters were exposed to various combination of the ambient temperature and pH currently measured in Persian Gulf (T = 24 ºC and pH = 8.1) and the expected ocean warming and acidification (T = 28 ºC and pH = 7.6), as well as proper PhE concentration (0.8 ng.l− 1) during 28 days. In all exposures, higher PhE contents were observed under hypercapnia and warming condition in the digestive gland and gills, followed by the mantle and muscle. Generally, the results visibly reveal that longer exposure period led to promote PhE bioaccumulation in all tissues under ocean warming and acidification environment which was time-dependent pattern of PhE accumulation in P.radiata. Present-day PhE environmental concentrations, which combined with ocean warming and acidification, may lead to rigorous interruption of physiological functions can be extra threatened the ecological fitness of pearl oysters.

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First genotoxicity assessment of marine environment in Qatar using the local Pearl oyster Pinctada radiata

Cited by 9 publications

References 52 publications

The biological effects of chemical contaminants in the Arabian/Persian Gulf: A review

The biological effects of chemical contaminants in the Arabian/Persian Gulf: A review

Methylmercury, Trace Metals, Organotins and Their Effects on the Qatari Mangrove Shrimp, Palaemon khori

The Effect of Global Warming and Acidification on PAHs Bioaccumulation in Pearl Oyster Pinctada Radiate

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