Effects of sublethal application of Deepwater Horizon oil to bird eggs on embryonic heart and metabolic rate
© 2020 Society for Conservation Biology.
| Publié dans: | Conservation biology : the journal of the Society for Conservation Biology. - 1989. - 34(2020), 5 vom: 17. Okt., Seite 1262-1270 |
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| Auteur principal: | |
| Autres auteurs: | , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2020
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| Accès à la collection: | Conservation biology : the journal of the Society for Conservation Biology |
| Sujets: | Journal Article aerobic scope ambiente aeróbico avian toxicology bioenergetics bioenergética crude oil spill derrame de crudo embriotoxicidad embryotoxicity plus... |
| Résumé: | © 2020 Society for Conservation Biology. Following large crude oil spills, oil from feathers of brooding birds and oiled nesting material can transfer to eggs, resulting in reduced embryonic viability for heavily oiled eggs. Eggs may also be subjected to trace or light oiling, but functional teratogenic effects from sublethal crude oil exposure have not been examined. We assessed whether sublethal application of weathered Deepwater Horizon crude oil to the eggshell surface alters heart rate and metabolic rate in Zebra Finch (Taeniopygia guttata) embryos. We first determined sublethal applications with a dosing experiment. Embryo viability for eggs exposed to 5 μL or more of crude oil decreased significantly. We conducted a second experiment to measure heart rate and metabolic rate (CO2 production) 5 and 9 d after 1 sublethal application of crude oil to eggshells on day 3 of incubation. One application of 1.0 or 2.5 µL of crude oil reduced embryonic heart rate and metabolic rate on day 12 of incubation. Using unfertilized eggs, we measured the transfer of polycyclic aromatic hydrocarbons (PAHs) from the eggshell surface to egg contents 9 d after a single application of sublethal crude oil. Our results suggest avian eggs externally exposed to small amounts of crude oil may exhibit protracted embryonic development and impaired postnatal cardiac performance |
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| Description: | Date Completed 26.02.2021 Date Revised 26.02.2021 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1523-1739 |
| DOI: | 10.1111/cobi.13539 |