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Competitive binding of persistent organic pollutants to the thyroid hormone transport protein transthyretin in glaucous gull ( Larus hyperboreus ).

https://arctichealth.org/en/permalink/ahliterature297153
Source
Norwegian University of Science and Technology. Department of Biology. ix, 63, 12 p.
Publication Type
Dissertation
Date
2015
, precipitation, sea ice conditions) and combined with the effect of contaminations and anthropogenic stressors, organisms may be vulnerable to detrimental effects (Bustnes et al., 2008). Climate change might adverse this by increasing the amount of stress in wildlife when adapting to the environmental
  1 document  
Author
Mortensen, Åse-Karen
Source
Norwegian University of Science and Technology. Department of Biology. ix, 63, 12 p.
Date
2015
Language
English
Geographic Location
Norway
Publication Type
Dissertation
File Size
2569706
Keywords
Arctic
Glaucous gull
Persistent orgnic pollutants (POPS)
Metabolites
Thyroid
Svalbard
Abstract
The glaucous gull (Larus hyperboreus) is one of the largest avian top predators in the Arctic. High levels of persistent organic pollutants (POPs) and their metabolites have been detected in the glaucous gull, and several studies indicate that high levels of different POPs can contribute to detrimental effects. The mechanism behind these disruptions could be that chemicals interfere with the endocrine system. Thyroid hormones (THs) are important for thermogenesis, reproduction, growth and differentiation. They are transported in the circulation system of glaucous gull mainly bound to the transport proteins globulin, albumin and transthyretin (TTR). The aim of this study was to use molecular modeling to construct a homology model of the TTR in glaucous gull and to dock several well-known and new emerging POPs in the models to predict the binding affinity of POPs to the TH binding site in glaucous gull TTR...
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Interactions between Pollutant Exposure and the Physiology in Adult Kittiwakes (Rissa tridactyla) at Svalbard.

https://arctichealth.org/en/permalink/ahliterature297156
Source
Norwegian University of Science and Technology. Department of Biology. xii, 53 p.
Publication Type
Dissertation
Date
2015
movement has been scientifically addressing environmental issues regarding ecology and health. Due to increasing human activity and the introduction of new chemicals into the environment, these two issues are more important today than ever. Some of these chemicals degrade slowly in the environment
  1 document  
Author
Svendsen, Niels Borup
Source
Norwegian University of Science and Technology. Department of Biology. xii, 53 p.
Date
2015
Language
English
Geographic Location
Norway
Publication Type
Dissertation
File Size
1326344
Keywords
Svalbard
Black-legged kittiwakes
Polychlorinated Biphenyls (PCBs)
Polybrominated diphenylethers (PBDEs)
Organochlorine pesticides (OCPs)
Phosphorous flame retardants (PFRs)
Abstract
The present study investigated the use of feathers as a useful non-destructive biomonitoring tool for novel organic pollutants in black-legged kittiwakes (Rissa tridactyla), and evaluated the interaction of both novel and legacy pollutants on body condition and thyroid hormones. In July and August 2014, feather and blood samples were collected from 20 black-legged kittiwakes (Rissa tridactyla) at two colonies (Blomstrandhalvøya and Krykkjefjellet) in Kongsfjorden, Svalbard. Samples were analyzed for polychlorinated biphenyls (PCBs), polybrominated diphenylethers (PBDEs), organochlorine pesticides (OCPs) and phosphorous flame retardants (PFRs).
All compound classes were detected and quantified in feathers ranging from
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Levels and Effects of Organohalogens on Corticosterone Hormones in glaucous gulls (Larus hyperboreus) from Kongsfjorden, Svalbard.

https://arctichealth.org/en/permalink/ahliterature297158
Source
Norwegian University of Science and Technology. Department of Biology. vii, 85 p.
Publication Type
Dissertation
Date
2014
Levels and Effects of Organohalogens on Corticosterone Hormones in glaucous gulls (Larus hyperboreus) from Kongsfjorden, Svalbard Mari Engvig Løseth Environmental Toxicology and Chemistry Supervisor: Bjørn Munro Jenssen, IBI Co-supervisor: Geir Wing Gabrielsen, Polarinstituttet, NP
  1 document  
Author
Løseth, Mari Engvig
Source
Norwegian University of Science and Technology. Department of Biology. vii, 85 p.
Date
2014
Language
English
Geographic Location
Norway
Publication Type
Dissertation
File Size
1691408
Keywords
Svalbard
Glaucous gull
Organohalogenated contaminants (OHCs)
Corticosterone
Stress
Abstract
Long-range atmospheric transport, ocean currents, sea ice and rivers are transporting environmental contaminants into the Arctic. Some of these contaminants can reach high concentrations in the upper trophic levels in the Arctic food web due to processes of bioaccumulation and biomagnification. The present study indicates a sex-specific pattern of levels and effects of selected organohalogenated contaminants (OHCs) in the avian top predator, glaucous gull (Larus hyperboreus), breeding in Kongsfjorden, Svalbard. The aim of this present study was to report levels of OHCs and investigate whether the high levels detected in glaucous gulls can induce stress and thereby influence the stress response (measured by corticosterone concentration). No statistical differences were recorded for stress-induced or baseline corticosterone concentrations for males and female glaucous gulls. In females, a significant negative association was reported for lipid weight in blood plasma and baseline corticosterone. In male glaucous gulls, positive associations were found between levels of twenty-two OHCs and elevated baseline levels of corticosterone; indicating for the first time a “cocktail” effect of specific OHCs in blood plasma associated with high baseline levels of corticosterone in male glaucous gulls. It is suggested that the high levels of OHCs may act as a chronic stressor. The OHCs may interfere with the Arctic seabirds’ ability to respond to environmental stressors, such as climate change and food availability, by disrupting the baseline levels of corticosterone and weakening the feedback mechanisms of the stress axis. Elevated baseline levels may lead to suppression of immune parameters and reduced survival rate. Due to a small sample size assessed in the present study, more research is needed to confirm a possible relationship between the disrupted stress axis and environmental contaminants in the Arctic seabirds.
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Riddu Riddu, joik or rock-n-roll? A study of Riddu Riddu Festivála and its role as a cultural tool for ethnic revialization [sic].

https://arctichealth.org/en/permalink/ahliterature297029
Source
Faculty of Social Sciences, University of Tromsø, Norway.
Publication Type
Dissertation
Date
April 2008
  1 document  
Author
Leonenko, Anastassia Valerievna
Source
Faculty of Social Sciences, University of Tromsø, Norway.
Date
April 2008
Language
English
Geographic Location
Norway
Publication Type
Dissertation
File Size
1656646
Keywords
International Indigenous Riddu Riddu Festivála
Manndalen
Coastal Saami
Culture
Language
Lifestyle
Revitalisation
Abstract
The International Indigenous Riddu Riddu Festivála has taken place every year since 1991 in Manndalen, a Coastal Saami hamlet, in the municipality of Kåfjord in the county of Troms in the North of Norway. The festival represents by itself an independent event that through indigenous management and developed ethno-relations inside the country, promoting the idea of cultural awareness and sensitivity to all ethnic groups, however different they might be, and support them in terms of preservation of their culture, language, and lifestyle in our global and developed world.
This thesis is intended to show the ambiguity and complexity of the Coastal Saami identity in Manndalen, not only with relation to Norwegians, but also with reference to the situation among locals, between adults and youth, traditions and modernity. In other words, which relations between traditions and modernity does Riddu Riddu demonstrate? Therefore this thesis will try to find out the relation of manndalinger to the cultural invention and show their chosen way of the invasion of traditions and how far they accept distortions as authentic to their heritage during the process of cultural invention and which sign-substitutions can be defined in relation to Coastal Saami culture today. Moreover, the purpose of this thesis is to understand the process by which means invented portions of culture acquire authenticity. In other words, how the social reproduction of culture – the process whereby people learn, embody, and transmit the conventional behaviours of their society (Hanson 1989:898) – is happening in the Coastal Saami community today. Therefore the Riddu Riddu festival will be considered further as one of the examples of Coastal Saami cultural invention with the purpose of revitalization an ethnic identity.
Thus, the Riddu Riddu festival can be seen as a visible tool in Manndalen’s process of ethnic revitalisation. In this case, can the festival be considered as an example of an imagined community (Anderson 1983), created as a cultural arena for the Saami political debates and bringing Saami people, the young and the old generation, together? Further, the festival can be seen as an important tool in the process of Coastal Saami ethnic revitalisation with perspectives on northern indigenous and in general world community nowadays. What is the role of this imagined community for its participants? What challenges do manndalinger have in creating both a local and a global symbolic community?
This master thesis is tended to bring up questions for further discussions and become one of the colourful pieces in the mosaic of understanding the Riddu Riddu festival and its role in the revitalisation of Saami identity.
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Sami traditions: Márkomeannu's contribution to the revitalization of Sami food traditions.

https://arctichealth.org/en/permalink/ahliterature295943
Source
University of Tromsø Norway. Faculty of Humanities, Social Sciences and Education. Master of Philosophy in Indigenous Studies.
Publication Type
Dissertation
Date
Autumn 2014
are several indigenous research ethics guidelines and reports. One of them is the Indigenous Peoples Health Research Centre’s (IPHRC, 2004) research ethics involving indigenous peoples. These guidelines are developed to embrace 5 decolonizing methods and to conduct research on indigenous
  1 document  
Author
Berg, Elisabeth
Source
University of Tromsø Norway. Faculty of Humanities, Social Sciences and Education. Master of Philosophy in Indigenous Studies.
Date
Autumn 2014
Language
English
Geographic Location
Norway
Publication Type
Dissertation
File Size
3175632
Keywords
Skånland
Sami
Traditional diet
Articulation
Revitalization
Globalization
Modernization
Abstract
This thesis focuses on the Márkomeannu festival’s contribution to the revitalization of food traditions. The study was conducted on the Márkomeannu festival in Skånland in Troms County, specifically in the Markasami areas in the rural hills of Skånland. The festival was chosen because it is an important arena for expression of indigeneity and culture. Many areas within the Sami community have suffered from assimilation and have afterwards gone through a process of revitalization. The process of revitalization of the culture, language, politics and history has been thoroughly studied and written about, but the revitalization of Sami traditional food has not been studied in detail. Food is an important cultural marker which works as building stones of each cultural foundation. Food can be both symbolic and be a purely practical necessity for a culture. The thesis establishes that some traditional dishes are adopted and adapted from international dishes. The results shows that traditional dishes are used to articulate the Sami culture, and that traditions can be adapted to a modern outlook, and also adapted to fit a Sami cultural profile. Márkomeannu as a cultural arena contributes to revitalization of food by creating a platform for cultural expression which can lead to a stronger Sami identity and a feeling of safety in expressing culture.
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Temporal trends of POPs in arctic foxes from Svalbard in light of a changing climate.

https://arctichealth.org/en/permalink/ahliterature297159
Source
Arctic University of Norway. Department of Arctic and Marine Biology. v, 31 p.
Publication Type
Dissertation
Date
2013
. 2.5 Chemical analysis of OCPs and PCBs The liver samples were analyzed for POPs at the Laboratory of Environmental Toxicology at the Norwegian School of Veterinary Science (NVH) in Oslo. The laboratory is accredited by Norwegian Accreditation for testing the analyzed chemicals in biological
  1 document  
Author
Andersen, Martin Solhøi
Source
Arctic University of Norway. Department of Arctic and Marine Biology. v, 31 p.
Date
2013
Language
English
Geographic Location
Norway
Publication Type
Dissertation
File Size
7288057
Keywords
Svalbard
Arctic fox
Climate change
Persistent organic pollutants (POPs)
Liver
Reindeer
Abstract
The present study investigates concentrations and temporal trends of persistent organic pollutants (POPs) in arctic foxes (Vulpes lagopus) from Svalbard, Norway, adjusted for sex, age, body condition, diet, reindeer mortality and sea ice coverage. Number of reindeer carcasses in Adventdalen and sea ice coverage of Isfjorden in the spring preceding the trapping season were used as indexes for climate influenced food availability between years. We analysed liver of 100 foxes from Svalbard, collected in 1997/98, 1998/99, 1999/00, 2001/02, 2002/03, 2003/04 and 2010/11 for concentrations of polychlorinated biphenyls (PCBs; PCB -28, -52, -101, -118, -138, -153 and -180), chlordanes (cis-chlordane, trans-nonachlor and oxychlordane), p-p’-DDT, p-p’-DDE, HCB, mirex and ß-HCH. The POPs found in highest concentrations were oxychlordane, PCB-180 and PCB-153. We found evidence for a temporal decrease in SPCBs (PCB -118, -138, -153, -180), and Schlordanes (trans-nonachlor and oxychlordane) when controlling for possible confounding variables. We also found evidence for an effect of body condition and d13C on the POP concentrations, as thinner foxes and foxes feeding from the marine food web had significantly higher levels of POPs. There was no evidence for effects of sex, age, reindeer mortality and sea ice coverage on the concentrations of POPs, although increased reindeer mortality had a non-significant negative effect on all the POPs analysed. This study shows that correcting for body condition and diet is vital when investigating temporal trends of POPs in biota. It also illustrates some of the difficulties of investigating POP concentrations in an arctic predator living in an environment influenced by climatic variations.
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6 records – page 1 of 1.