Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health
Biomagnifying organohalogenated contaminants (OCHs) may have adverse effects on the health of birds, especially in marine avian top predators that accumulates high loads of such contaminants. Contaminants may impact the immune system by impairment of the humoral immunity and also influence the antio...
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UiT Norges arktiske universitet
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ftunivtroemsoe:oai:munin.uit.no:10037/6819 2023-05-15T16:32:42+02:00 Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health Sletten, Silja 2014-09-15 https://hdl.handle.net/10037/6819 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/6819 URN:NBN:no-uit_munin_6420 openAccess Copyright 2014 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3950 Master thesis Mastergradsoppgave 2014 ftunivtroemsoe 2021-06-25T17:54:03Z Biomagnifying organohalogenated contaminants (OCHs) may have adverse effects on the health of birds, especially in marine avian top predators that accumulates high loads of such contaminants. Contaminants may impact the immune system by impairment of the humoral immunity and also influence the antioxidant enzyme activity. Moreover, developmental conditions may affect the shortening of telomeres, one of the main mechanism explaining cell senescence, and it is proven that birds in growth have their telomeres influenced by among other the amount of oxidative stress during their development. To examine the potential effects of organohalogenated contaminants (OCHs) on physiological biomarkers of health, OCHs with different physiochemical properties were related to individual variations in humoral immunity (immunoglobulin Y levels), superoxide dismutase enzyme (SOD) activity, and telomere length in nestlings (n = 35) of white-tailed eagles (Haliaeetus albicilla) in northern Norway. Different organochlorines (OCs) and perfluoroalkylated substances (PFASs) were measured in blood plasma of 7-8 weeks old nestlings, demonstrating higher concentrations of the emerging contaminants (PFASs), notably PFOSli (mean = 40.91 ng/g ww), compared to legacy contaminants (OCs). There were no relationships between the contaminant loadings and plasma immunoglobulin Y (IgY) levels. Moreover, differences between years were found for the telomere length, which was not due to contaminant loadings, but more likely a result of the developmental conditions between the two years sampling took place. However, there were significant and negative relationships between the OC loadings and the super oxidative enzyme (SOD) activity (p<0.01). This suggest that legacy OCs are challenging the antioxidant capacity in nestlings of white-tailed eagles. Master Thesis Haliaeetus albicilla Northern Norway University of Tromsø: Munin Open Research Archive Norway |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3950 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3950 Sletten, Silja Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3950 |
description |
Biomagnifying organohalogenated contaminants (OCHs) may have adverse effects on the health of birds, especially in marine avian top predators that accumulates high loads of such contaminants. Contaminants may impact the immune system by impairment of the humoral immunity and also influence the antioxidant enzyme activity. Moreover, developmental conditions may affect the shortening of telomeres, one of the main mechanism explaining cell senescence, and it is proven that birds in growth have their telomeres influenced by among other the amount of oxidative stress during their development. To examine the potential effects of organohalogenated contaminants (OCHs) on physiological biomarkers of health, OCHs with different physiochemical properties were related to individual variations in humoral immunity (immunoglobulin Y levels), superoxide dismutase enzyme (SOD) activity, and telomere length in nestlings (n = 35) of white-tailed eagles (Haliaeetus albicilla) in northern Norway. Different organochlorines (OCs) and perfluoroalkylated substances (PFASs) were measured in blood plasma of 7-8 weeks old nestlings, demonstrating higher concentrations of the emerging contaminants (PFASs), notably PFOSli (mean = 40.91 ng/g ww), compared to legacy contaminants (OCs). There were no relationships between the contaminant loadings and plasma immunoglobulin Y (IgY) levels. Moreover, differences between years were found for the telomere length, which was not due to contaminant loadings, but more likely a result of the developmental conditions between the two years sampling took place. However, there were significant and negative relationships between the OC loadings and the super oxidative enzyme (SOD) activity (p<0.01). This suggest that legacy OCs are challenging the antioxidant capacity in nestlings of white-tailed eagles. |
format |
Master Thesis |
author |
Sletten, Silja |
author_facet |
Sletten, Silja |
author_sort |
Sletten, Silja |
title |
Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health |
title_short |
Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health |
title_full |
Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health |
title_fullStr |
Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health |
title_full_unstemmed |
Organohalogenated contaminants in nestlings of white-tailed eagles (Haliaeetus albicilla): Plasma concentrations and possible influences on biomarkers of health |
title_sort |
organohalogenated contaminants in nestlings of white-tailed eagles (haliaeetus albicilla): plasma concentrations and possible influences on biomarkers of health |
publisher |
UiT Norges arktiske universitet |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/6819 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Haliaeetus albicilla Northern Norway |
genre_facet |
Haliaeetus albicilla Northern Norway |
op_relation |
https://hdl.handle.net/10037/6819 URN:NBN:no-uit_munin_6420 |
op_rights |
openAccess Copyright 2014 The Author(s) |
_version_ |
1766022451908575232 |