Effects of two stressors on amphibian larval development
| Autor: | Daniel P. Coughlin, Olga V. Tsyusko, Thomas G. Hinton, Karolina Stark, David E. Scott |
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| Rok vydání: | 2011 |
| Předmět: |
Amphibian
Water Pollutants Radioactive Health Toxicology and Mutagenesis media_common.quotation_subject Population Biology Environment Population density Ionizing radiation Amphibians Stress Physiological biology.animal Animals Body Size Metamorphosis education media_common Population Density Larva education.field_of_study Ecology Stressor Public Health Environmental and Occupational Health Metamorphosis Biological General Medicine biology.organism_classification Pollution Cesium Radioisotopes Female Anura Scaphiopus holbrookii |
| Zdroj: | Ecotoxicology and environmental safety. 79 |
| ISSN: | 1090-2414 |
| Popis: | In parallel with a renewed interest in nuclear power and its possible environmental impacts, a new environmental radiation protection system calls for environmental indicators of radiological stress. However, because environmental stressors seldom occur alone, this study investigated the combined effects of an ecological stressor (larval density) and an anthropogenic stressor (ionizing radiation) on amphibians. Scaphiopus holbrookii tadpoles reared at different larval densities were exposed to four low irradiation dose rates (0.13, 2.4, 21, and 222 mGy d(-1)) from (137)Cs during the sensitive period prior to and throughout metamorphosis. Body size at metamorphosis and development rate served as fitness correlates related to population dynamics. Results showed that increased larval density decreased body size but did not affect development rate. Low dose rate radiation had no impact on either endpoint. |
| Databáze: | OpenAIRE |
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