Toxicological and thermoregulatory effects of feather contamination with artificially weathered MC 252 oil in western sandpipers ( Calidris mauri )
| Autor: | Kendal E. Harr, Christopher G. Guglielmo, Alexander R. Gerson, Karen M. Dean, Ivan Maggini, Steven J. Bursian, Lisa V. Kennedy, Karen L. Pritsos, Chris A. Pritsos, Jane E. Link |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
food.ingredient Health Toxicology and Mutagenesis Sodium chemistry.chemical_element 010501 environmental sciences Biology Administration Cutaneous medicine.disease_cause 010603 evolutionary biology 01 natural sciences Charadriiformes Respirometry food Animal science Toxicity Tests medicine Animals Ingestion Petroleum Pollution Weather 0105 earth and related environmental sciences Body Weight Public Health Environmental and Occupational Health General Medicine Feathers Thermoregulation Contamination Pollution Oxidative Stress Calidris Petroleum Liver chemistry Environmental chemistry Feather visual_art visual_art.visual_art_medium Energy Metabolism Water Pollutants Chemical Oxidative stress Body Temperature Regulation |
| Zdroj: | Ecotoxicology and Environmental Safety. 146:118-128 |
| ISSN: | 0147-6513 |
| Popis: | The external contamination of bird feathers with crude oil might have effects on feather structure and thus on thermoregulation. We tested the thermoregulatory ability of western sandpipers (Calidris mauri) in a respirometry chamber with oil applied either immediately prior, or three days before the experiment. The birds were then exposed to a sliding cold temperature challenge between 27 °C and −3 °C to calculate thermal conductance. After the experiment, a large blood sample was taken and the liver extracted to measure a range of parameters linked to toxicology and oxidative stress. No differences in thermal conductance were observed among groups, but birds exposed to oil for three days had reduced body temperatures and lost more body mass during that period. At necropsy, oiled birds showed a decrease in plasma albumin and sodium, and an increase in urea. This is reflective of dysfunction in the kidney at the loop of Henle. Birds, especially when exposed to the oil for three days, showed signs of oxidative stress and oxidative damage. These results show that the ingestion of externally applied oil through preening or drinking can cause toxic effects even in low doses, while we did not detect a direct effect of the external oil on thermoregulation over the temperature range tested. |
| Databáze: | OpenAIRE |
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