Thermal Tolerance of Red Shiner ( Cyprinella lutrensis ) After Exposure to Atrazine, Terbufos, and Their Mixtures

Messaad, Ibrahim A.; Peters, Edward J.; Young, Linda J.

doi:10.1007/s001280000067

Cited by 12 publications

(10 citation statements)

References 10 publications

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“…In most thermal treatment combinations, exposure to the pesticide CPF reduced the heat tolerance of both low-and high-latitude larvae. This matches the TICS concept 2 and is consistent with the general pattern in aquatic ectotherms (in fish [12][13][14] ; in damselflies 15,16 , including the study species 17,18 ). Heat tolerance is determined by the mismatch between oxygen demand and supply occurring at high extreme temperatures 71 .…”

Section: Warming and Dtfs Increased Pesticide Toxicity (Cits)supporting

confidence: 86%

“…This is encapsulated in the "climate-induced toxicant sensitivity" (CITS) concept 2,4,11 . On the other hand, many studies demonstrated that exposure to chemical toxicants can decrease the heat tolerance of ectotherms [12][13][14][15][16][17][18] . The latter is captured by the "toxicant-induced climate change sensitivity" (TICS) concept 1,2,4 .…”

Section: Introductionmentioning

confidence: 99%

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Increased Daily Temperature Fluctuations Overrule the Ability of Gradual Thermal Evolution to Offset the Increased Pesticide Toxicity under Global Warming

Verheyen

Delnat

Stoks

2019

Environ. Sci. Technol.

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The widespread evidence that global warming can increase species sensitivities to chemical toxicants and vice versa, and the recent insight that thermal evolution may mitigate these effects is crucial to predict the future impact of toxicants in a warming world. Nevertheless, a major component of global warming, the predicted increase in daily temperature fluctuations (DTFs), has been ignored at the interface of evolutionary ecotoxicology and global change biology. We studied whether 4°C warming and an 5°C DTF increase (to 10°C DTF) magnified the negative impact of the insecticide chlorpyrifos (CPF) in larvae of low-and high-latitude populations of the damselfly Ischnura elegans. While 4°C warming only increased CPF-induced mortality in high-latitude larvae, the high (10°C) DTF increased CPF-induced larval mortality at both latitudes. CPF reduced the heat tolerance, however, this was buffered by latitude-specific thermal adaptation to both mean temperature and DTF. Integrating our results in a space-for-time substitution indicated that gradual thermal evolution in high-latitude larvae may offset the negative effects of CPF on heat tolerance under warming, unless the expected DTF increase is taken into account. Our results highlight the crucial importance of jointly integrating DTFs and thermal evolution to improve risk assessment of toxicants under global warming.

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Section: Warming and Dtfs Increased Pesticide Toxicity (Cits)supporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Increased Daily Temperature Fluctuations Overrule the Ability of Gradual Thermal Evolution to Offset the Increased Pesticide Toxicity under Global Warming

Verheyen

Delnat

Stoks

2019

Environ. Sci. Technol.

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“…For example, Landrum et al (1999) showed that the toxicity of terbufos to C. riparius in both sediment and water exposure systems (at pH 8) was increased by four and ten-fold, respectively, when the temperature was raised from 11 to 25°C. This trend is consistent across a suite of other aquatic taxa (BreckenFolse et al 1994;Howe et al 1994;Messaad et al 2000) and is due to the greater bioaccumulation and increased metabolic conversion of the parental OPs to their oxon analogs at higher temperatures (Lydy et al 1990). Many studies do not consider the toxic effects of pesticide transformation/degradation products due, to a presumption that they are of little or no toxicological relevance (Day 1991).…”

Section: Discussionmentioning

confidence: 51%

A low concentration of atrazine does not influence the acute toxicity of the insecticide terbufos or its breakdown products to Chironomus tepperi

Choung

Hyne²,

Stevens

et al. 2010

Ecotoxicology

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The acute toxicities of the insecticide terbufos and its major breakdown products individually, as binary mixtures, and in combination with the co-applied herbicide atrazine were evaluated using final instar larvae of the midge Chironomus tepperi. Terbufos, terbufos sulfoxide and terbufos sulfone were highly toxic to C. tepperi with mean 96-h EC50 values of 2.13, 3.64 and 2.59 μg/l, respectively. No interaction was observed between atrazine (25 μg/l) and terbufos or its breakdown products while the binary mixture of terbufos sulfoxide and terbufos sulfone exhibited additive toxicity. The high toxicities of terbufos and its environmentally persistent oxidation products suggest that contamination of aquatic systems with this insecticide pose a threat to aquatic organisms whether or not atrazine is also present.

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“…Takle et al (1983) reported that sublethal concentrations of the biocide endothall, which is a protein phosphatase A 2 inhibitor, had no significant effect on CT max in another subtropical eurythermal North American species, the red shiner Cyprinella lutrensis , acclimated to 20°C. In the same species, Messaad et al (2000) investigated effects on CT max of sublethal concentrations of the triazine herbicide, atrazine, of an OP pesticide, terbufos, plus a cocktail of these, comparing effects on fish acclimated to 23° or 30°C. Toxic actions of atrazine in animals are supposedly related only to endocrine disruption.…”

Section: Effects Of Contaminants On Tolerance Of Warmingmentioning

confidence: 99%

“…The mechanisms underlying the increased impact upon CT max at the higher temperatures may relate to increased metabolic rates and ventilatory water flows, which would cause increased uptake of contaminants from the water (Yang et al, 2000). Such results indicate that, as T acc increases, fishes may be more vulnerable to heat stress when they are also exposed to certain environmental contaminants (Messaad et al, 2000).…”

Section: Effects Of Contaminants On Tolerance Of Warmingmentioning

confidence: 99%

Use of complex physiological traits as ecotoxicological biomarkers in tropical freshwater fishes

et al. 2021

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We review the use of complex physiological traits, of tolerance and performance, as biomarkers of the toxicological effects of contaminants in subtropical and tropical freshwater fishes. Such traits are growing in relevance due to climate change, as exposure to contaminants may influence the capacity of fishes to tolerate and perform in an increasingly stressful environment. We review the evidence that the critical oxygen level, a measure of hypoxia tolerance, provides a valuable biomarker of impacts of diverse classes of contaminants. When coupled with measures of cardiorespiratory variables, it can provide insight into mechanisms of toxicity. The critical thermal maximum, a simple measure of tolerance of acute warming, also provides a valuable biomarker despite a lack of understanding of its mechanistic basis. Its relative ease of application renders it useful in the rapid evaluation of multiple species, and in understanding how the severity of contaminant impacts depends upon prevailing environmental temperature. The critical swimming speed is a measure of exercise performance that is widely used as a biomarker in temperate species but very few studies have been performed on subtropical or tropical fishes. Overall, the review serves to highlight a critical lack of knowledge for subtropical and tropical freshwater fishes. There is a real need to expand the knowledge base and to use physiological biomarkers in support of decision making to manage tropical freshwater fish populations and their habitats, which sustain rich biodiversity but are under relentless anthropogenic pressure.

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Thermal Tolerance of Red Shiner ( Cyprinella lutrensis ) After Exposure to Atrazine, Terbufos, and Their Mixtures

Cited by 12 publications

References 10 publications

Increased Daily Temperature Fluctuations Overrule the Ability of Gradual Thermal Evolution to Offset the Increased Pesticide Toxicity under Global Warming

Increased Daily Temperature Fluctuations Overrule the Ability of Gradual Thermal Evolution to Offset the Increased Pesticide Toxicity under Global Warming

A low concentration of atrazine does not influence the acute toxicity of the insecticide terbufos or its breakdown products to Chironomus tepperi

Use of complex physiological traits as ecotoxicological biomarkers in tropical freshwater fishes

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