Licht-im-Terrarium: Literaturdatenbank
Licht-im-Terrarium: Literaturdatenbank |
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Croteau, M. C., Martyniuk, C. J., Trudeau, V. L., & Lean, D. R. S. (2008). Chronic exposure of rana pipiens tadpoles to uvb radiation and the estrogenic chemical 4-tert-octylphenol. Journal of Toxicology and Environmental Health, Part A, 71(2), 134–144. Added by: Sarina (2013-09-19 10:23:21) Last edited by: Sarina (2013-09-19 10:23:35) |
| Resource type: Journal Article DOI: 10.1080/15287390701613330 BibTeX citation key: Croteau2008 View all bibliographic details  |
Categories: Englisch = English Keywords: Amphibien = Amphibians, Ultraviolett = Ultraviolet Creators: Croteau, Lean, Martyniuk, Trudeau Collection: Journal of Toxicology and Environmental Health, Part A |
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| Abstract |
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While adverse effects of exposure to ultraviolet B radiation (UVBR) and environmental pollutants on amphibians have been documented, few studies examined the effects of interactions between environmental stressors on amphibian health. Here the impacts of chronic exposure to UVBR and the estrogenic chemical 4-tert-octylphenol (OP), alone and in combination, on the survival, development, growth, and metamorphosis of Rana pipiens (northern leopard frog) tadpoles are evaluated. Tadpoles were exposed to environmentally relevant levels of OP (0.01 or 10 nM), with and without exposure to UVBR (∼0.22 W/m2). After 8 mo of exposure, animals were transferred to a clean-water grow-out system for 3 additional mo. There was no effect of treatments on the weights of animals at wk 42 or on the age, snout–vent length (SVL), and weights of tadpoles at forelimb emergence (FLE). However, tadpoles exposed to UVBR had markedly delayed development and significantly fewer reached metamorphosis compared to control animals. Although exposure to UVBR and OP together produced the highest incidence of mortality and developmental anomalies, UVBR alone was sufficient to produce significant mortality of tadpoles, and exposure to UVBR or OP alone induced a significant increase in malformations and abnormalities. The malformations observed consisted mainly of spinal curvature. Our results show that chronic exposure to environmental levels of UVBR or OP alone exerts lethal and/or sublethal effects on R. pipiens tadpoles.
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