Respiratory and behavioral effects of ozone on a lizard and a frog

Mautz, William J.; Dohm, Michael R.

doi:10.1016/j.cbpb.2004.10.004

Cited by 8 publications

(6 citation statements)

References 33 publications

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“…This small difference in T b was enough to show a statistically significant effect in O 3 ‐exposed, but not air‐exposed, toads. Moreover, this finding is consistent with our previous study, which showed that O 3 ‐exposed toads selected cooler temperatures in a thermal gradient [17,18]. Increased body temperature increases metabolic activity and therefore O 3 ‐related effects on tissues.…”

Section: Discussionsupporting

confidence: 92%

“…Increased body temperature increases metabolic activity and therefore O 3 ‐related effects on tissues. Anurans exposed to O 3 adopt a reduced‐surface posture, which is similar the water conservation posture [18].…”

Section: Discussionmentioning

confidence: 99%

“…A concentration of 0.6 μl/L O 3 was used for all exposures, which corresponds to levels at the upper range of observations in urban settings. This level of O 3 induces significant, but transient respiratory irritation in mammals in short‐term single exposures lasting several hours [21] and has been shown by us to affect metabolic and thermoregulatory behavior in reptiles [18] and amphibians [17,18] and to affect immunological function in amphibians [19]. Although the dose is at the upper range of historically recorded values, this is an intermediate dosage used to study effects in human and animal subjects [20].…”

Section: Methodsmentioning

confidence: 99%

“…Compared with mammals and other endotherms, a much greater portion of the respiratory surface of a toad can be exposed to O 3 and other airborne pollutants because significant gas exchange occurs across the skin of many amphibians [28]. Previously, we demonstrated that O 3 alters physiological processes in both reptiles [18] and amphibians [17‐19]. In the marine toad Bufo marinus , we demonstrated reduced immune function (reduced pulmonary macrophage phagocytosis) as a result of a single 4‐h exposure of O 3 [19].…”

Section: Introductionmentioning

confidence: 99%

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Ozone exposure affects feeding and locomotor behavior of adult Bufo marinus

Dohm¹,

Mautz²,

Doratt³

et al. 2008

Enviro Toxic and Chemistry

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Ozone (O3), a reactive component of air pollution, depresses feeding and voluntary locomotor behavior in laboratory rodents, but the effects of O3 on amphibian behavior are not known. We evaluated the effects of 4 h of exposure to air or ozone (0.6 microl/L), on two ecologically relevant behaviors of the toad Bufo marinus. Toads were offered five mealworms at 1, 24, and 48 h after exposure. One hour after exposure, O3-exposed toads ate fewer mealworms than did air-exposed toads (Fisher exact test, p=0.005). Within 24 h after exposure, all toads ate four or five mealworms. Because movement is a key component of toad feeding behavior, we tested additional toads (n=25) for voluntary locomotor behavior during three 1-h trials in a 2.9-m2 open-field arena. Mean (+/-standard deviation) total distance moved was: pre-exposure, 29+/-19.5 m; 1-h postexposure, 13+/-15.6 m; and 24-h postexposure, 17+/-17.4 m. The means were not statistically different by repeated measures analysis of covariance. Therefore, our results suggest that a single 4-h exposure to O3 depresses toad feeding behavior after exposure but had little effect on voluntary locomotor behavior.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ozone exposure affects feeding and locomotor behavior of adult Bufo marinus

Dohm¹,

Mautz²,

Doratt³

et al. 2008

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…Our knowledge of O3 impacts on the health of non-mammalian taxa is scarce, but some studies focussing on amphibians do exist. Toads may exhibit a reduction in lung ventilation and a decline in oxygen consumption after O3 exposure, which is linked to stressful physiological effects (Mautz et al, 2004;Dohm et al, 2001Dohm et al, , 2008. Exposure to O3 can also alter the water balance and thermal preferences in anuran amphibians (Dohm et al, 2001(Dohm et al, , 2005.…”

Section: Introductionmentioning

confidence: 99%