DNA damage and radiocesium in channel catfish from chernobyl

Sugg, Derrick W.; Brooks, Janet; Jagoe, Charles H.; Smith, Michael H.; Chesser, Ronald K.; Bickham, John W.; Lomakin, Michael D.; Dallas, Cham E.; Baker, Robert J.

doi:10.1002/etc.5620150706

Cited by 51 publications

(25 citation statements)

References 40 publications

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“…Levels of contamination and dose rate estimates reported here would be expected to confer considerable insult to genetic material by ionizing radiation. Genetic damage and elevated rates of chromosomal aberrations has been reported for animals [9,[33][34][35][36][37][38][39] and exposed humans [40][41][42] from the Chornobyl region. Elevated mutation rates were reported for a mitochondrial gene for rodents from Chornobyl [37].…”

Section: Discussionmentioning

confidence: 99%

Concentrations and Dose Rate Estimates of 134,137cesium and 90strontium in Small Mammals at Chornobyl, Ukraine

Chesser¹,

Sugg²,

Lomakin³

et al. 2000

Environ Toxicol Chem

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118

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Abstract-Free-ranging mammals near the Chornobyl nuclear reactor are experiencing substantial radiation dose rates from intramuscular concentrations of 134,137 Cs and skeletal 90 Sr. Radiocesium concentrations averaged 3,200 Bq/g of dry muscle, compared to a mean of 297 Bq 90 Sr/g in bone for mammals in the Exclusion Zone, a region of restricted human activity surrounding the reactor. Estimates of dose rates from intramuscular sources of radiocesium averaged 2.4 mGy/d within 8 km of the reactor and ranged as high as 60 mGy/d. Overall dose rates from internal 90 Sr for mammals in the Exclusion Zone averaged 1.0 mGy/d, although doses to specific tissues are likely much higher. Mammals captured 30 km southeast of the reactor averaged only 2 Bq/g of muscle and were receiving an average of 1.4 Gy/d from internal radiocesium. Dramatic variation exists in the spatial pattern of radiocesium in areas immediately surrounding the reactor and within and between remediated and unremediated regions. The variance of 90 Sr for taxa among sites was significantly less than that for 134,137 Cs. Thermoluminescent dosimeters placed on free-ranging mice showed that dose rates from external sources of radiation were much greater than the dose rates from internal sources of radiocesium. Estimated dose rates in very small areas of the Chornobyl region exceed those reported to impede reproductive success in mammals.

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Section: Discussionmentioning

confidence: 99%

Concentrations and Dose Rate Estimates of 134,137cesium and 90strontium in Small Mammals at Chornobyl, Ukraine

Chesser¹,

Sugg²,

Lomakin³

et al. 2000

Environ Toxicol Chem

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118

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“…Deterministic models, which do not account for responses caused by dose rate, indicate that even low doses of radiation, such as those experienced by Chernobyl residents, are capable of producing genotoxicity. Studies conducted at Chernobyl have produced equivocal results [11][12][13][14][15][16]. Research coupling measured internal dose and estimated external dose with genetic effect in native mammals has not * To whom correspondence may be addressed (robert.baker@ttu.edu).…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial control region variation in bank voles (Clethrionomys glareolus) is not related to Chernobyl radiation exposure

Meeks

Wickliffe

Hoofer

et al. 2007

Environmental Toxicology and Chemistry

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Abstract-Three previous studies at Chernobyl, Ukraine, documented elevated mitochondrial DNA diversity in bank voles (Clethrionomys glareolus) from radioactively contaminated sites. Little evidence was found to link patterns of diversity in contaminated areas to radiation exposure, but the experimental design precluded discriminating among alternative explanations for elevated diversity in exposed groups. Reference sites selected for the studies were relatively distant from contaminated sites and, additionally, were separated from contaminated sites by large river systems; thus, we hypothesized that differences among sites were correlated with geographic isolation rather than with radiation exposure. For the present study, we added three reference sites, which were selected based on minimal radioactive contamination, proximity to contaminated sites, and absence of obvious barriers to dispersal. We hypothesized that neighboring reference sites should exhibit levels and patterns of diversity similar to those of contaminated sites if the previously detected differences were, in fact, caused by geographic isolation. Indeed, levels of diversity in nearby reference sites are comparable to levels in contaminated sites. Additionally, nearby reference sites contain several haplotypes not observed at other study sites. Our results suggest that levels of diversity in contaminated regions are more plausibly explained by ecological and historical factors than by increased mutational pressure resulting from exposure to Chernobyl radiation.

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“…For example, higher-than-normal levels of DNA strand breaks were noted in female mosquitofish Gambusia affinis (Baird & Girard, 1853) collected from the Oak Ridge Reservation of the US Department of Energy; an air dose rate of 43.8 rads/year was measured at the surface of sediment in this area [7]. Catfish Ictalurus punctatus (Rafinesque, 1818) from the cooling pond of the Chernobyl nuclear power plant exhibited a greater number of DNA stand breaks than do control fish [8]. Such genetic damage remained evident 20 years after Chernobyl [9].…”

Section: Discussionmentioning

confidence: 99%

Impact of the Great East Japan Earthquake on Reproductive Biology of the Freshwater Teleost Bluegill Lepomis macrochirus

2014

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Soon after the Great East Japan Earthquake and the subsequent accident at the Fukushima Daiichi nuclear power plant, we studied the reproductive biology of freshwater teleost bluegill (Lepomis macrochirus) in a pond in the city of Iwaki, Fukushima Prefecture, about 50 km south of the nuclear power plant. The breeding period of the bluegill was abbreviated and the frequency of spawning decreased. The radiation air dose rate and level of radioactivity in the fish were less than would be expected to trigger behavioural alterations or to suppress reproduction. The occurrence of aftershocks and two episodes of torrential rain is the likely reason for changes in the reproductive behaviour of bluegill in the pond. These results suggest that our observations can be explained by a combination of natural disasters, rather than the effects of nuclear radiation.

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DNA damage and radiocesium in channel catfish from chernobyl

Cited by 51 publications

References 40 publications

Concentrations and Dose Rate Estimates of 134,137cesium and 90strontium in Small Mammals at Chornobyl, Ukraine

Concentrations and Dose Rate Estimates of 134,137cesium and 90strontium in Small Mammals at Chornobyl, Ukraine

Mitochondrial control region variation in bank voles (Clethrionomys glareolus) is not related to Chernobyl radiation exposure

Impact of the Great East Japan Earthquake on Reproductive Biology of the Freshwater Teleost Bluegill Lepomis macrochirus

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