Polyhalogenated organic pollutants in amphibians
Polyhalogenated organic pollutants are xenobiotics, which are believed to cause considerable environmental pollution and human health problems as a result of their persistence, toxicity, and transformation into hazardous metabolites. These chemicals are persistent and are biomagnificated in the ecos...
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| Formato: | Second cycle, A1N, A1F or AXX |
| Lenguaje: | sueco Inglés |
| Publicado: |
2011
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| Acceso en línea: | https://stud.epsilon.slu.se/3618/ |
| _version_ | 1855570573092978688 |
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| author | Kulkarni, Pushkar |
| author_browse | Kulkarni, Pushkar |
| author_facet | Kulkarni, Pushkar |
| author_sort | Kulkarni, Pushkar |
| collection | Epsilon Archive for Student Projects |
| description | Polyhalogenated organic pollutants are xenobiotics, which are believed to cause considerable environmental pollution and human health problems as a result of their persistence, toxicity, and transformation into hazardous metabolites. These chemicals are persistent and are biomagnificated in the ecosystem. Amphibians (frogs) are considered as reliable indicators of environmental health because they form an important link in the food chain between insects and vertebrates. Furthermore, they are inhabitants of both
aquatic and terrestrial environments and occupy different positions in the food web at different stages of their life cycle. The different stages in the life cycle of frogs are tadpole, juvenile and adult stages.
The tadpole is transformed to a juvenile frog by metamorphosis. Disruption of this life cycle by xenobiotics can have disastrous effects on the amphibian populations. Polyhalogenated organic compounds have been known to cause endocrine disruption, effects on gene expression and induction of cytochrome P 450 enzymes in frogs. The present study was conducted to compare the tissue disposition of a polybrominated compound, 2, 2', 4, 4', 5-
pentabromodiphenyl ether (BDE 99) in tadpole and juvenile stages of Xenopus tropicalis (West African clawed frog). The study was performed using whole-body autoradiography and scintillation counting at different time intervals after dietary exposures of 14CBDE 99 at stage 54 (tadpoles) and stage 66 (juvenile frogs). From the results of the study it was concluded that there was a significant
difference between the uptake and retention of the chemical between tadpoles and frogs. Juvenile frogs had higher uptake and retention of the radio labelled chemical than tadpoles. The substance was retained in adipose tissue over 64 days in both stages. However, the localisation of substance was similar in both stages. |
| format | Second cycle, A1N, A1F or AXX |
| id | RepoSLU3618 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2011 |
| publishDateSort | 2011 |
| record_format | eprints |
| spelling | RepoSLU36182012-04-20T14:23:46Z https://stud.epsilon.slu.se/3618/ Polyhalogenated organic pollutants in amphibians Kulkarni, Pushkar Animal ecology Animal diseases Polyhalogenated organic pollutants are xenobiotics, which are believed to cause considerable environmental pollution and human health problems as a result of their persistence, toxicity, and transformation into hazardous metabolites. These chemicals are persistent and are biomagnificated in the ecosystem. Amphibians (frogs) are considered as reliable indicators of environmental health because they form an important link in the food chain between insects and vertebrates. Furthermore, they are inhabitants of both aquatic and terrestrial environments and occupy different positions in the food web at different stages of their life cycle. The different stages in the life cycle of frogs are tadpole, juvenile and adult stages. The tadpole is transformed to a juvenile frog by metamorphosis. Disruption of this life cycle by xenobiotics can have disastrous effects on the amphibian populations. Polyhalogenated organic compounds have been known to cause endocrine disruption, effects on gene expression and induction of cytochrome P 450 enzymes in frogs. The present study was conducted to compare the tissue disposition of a polybrominated compound, 2, 2', 4, 4', 5- pentabromodiphenyl ether (BDE 99) in tadpole and juvenile stages of Xenopus tropicalis (West African clawed frog). The study was performed using whole-body autoradiography and scintillation counting at different time intervals after dietary exposures of 14CBDE 99 at stage 54 (tadpoles) and stage 66 (juvenile frogs). From the results of the study it was concluded that there was a significant difference between the uptake and retention of the chemical between tadpoles and frogs. Juvenile frogs had higher uptake and retention of the radio labelled chemical than tadpoles. The substance was retained in adipose tissue over 64 days in both stages. However, the localisation of substance was similar in both stages. 2011-11-18 Second cycle, A1N, A1F or AXX NonPeerReviewed application/pdf swe https://stud.epsilon.slu.se/3618/1/kulkarni_p_111118.pdf Kulkarni, Pushkar, 2005. Polyhalogenated organic pollutants in amphibians . Second cycle, A1N, A1F or AXX ( AXX). Uppsala: (VH) > Dept. of Biomedical Sciences and Veterinary Public Health (until 231231) <https://stud.epsilon.slu.se/view/divisions/OID-713.html> urn:nbn:se:slu:epsilon-s-764 eng |
| spellingShingle | Animal ecology Animal diseases Kulkarni, Pushkar Polyhalogenated organic pollutants in amphibians |
| title | Polyhalogenated organic pollutants in amphibians
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| title_full | Polyhalogenated organic pollutants in amphibians
|
| title_fullStr | Polyhalogenated organic pollutants in amphibians
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| title_full_unstemmed | Polyhalogenated organic pollutants in amphibians
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| title_short | Polyhalogenated organic pollutants in amphibians
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| title_sort | polyhalogenated organic pollutants in amphibians |
| topic | Animal ecology Animal diseases |
| url | https://stud.epsilon.slu.se/3618/ https://stud.epsilon.slu.se/3618/ |