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dc.contributor.authorNossen, Ida
dc.contributor.authorCiesielski, Tomasz Maciej
dc.contributor.authorDimmen, Malene Vågen
dc.contributor.authorJensen, Henrik
dc.contributor.authorRingsby, Thor Harald
dc.contributor.authorPolder, Anuschka
dc.contributor.authorRønning, Bernt
dc.contributor.authorJenssen, Bjørn Munro
dc.contributor.authorStyrishave, Bjarne
dc.date.accessioned2017-10-30T13:19:53Z
dc.date.available2017-10-30T13:19:53Z
dc.date.created2016-01-22T20:53:05Z
dc.date.issued2016
dc.identifier.citationScience of the Total Environment. 2016, 547 295-304.nb_NO
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/11250/2462907
dc.description.abstractAt high trophic levels, environmental contaminants have been found to affect endocrinological processes. Less attention has been paid to species at lower trophic levels. The house sparrow (Passer domesticus) may be a useful model for investigating effects of POPs in mid-range trophic level species. In male house sparrows, ornamental traits involved in male quality signalling are important for female selection. These traits are governed by endocrinological systems, and POPs may therefore interfere with male quality signalling. The aim of the present study was to use the house sparrow as a mid-range trophic level model species to study the effects of environmental contaminants on endocrinology and male quality signalling. We analysed the levels of selected PCBs, PBDEs and OCPs and investigated the possible effects of these contaminants on circulating levels of steroid hormones (4 progestagens, 4 androgens and 3 estrogens) in male and female adult house sparrows from a population on the island Leka, Norway. Plasma samples were analysed for steroid hormones by GC–MS and liver samples were analysed for environmental contaminants by GC-ECD and GC-MS. In males, we also quantified ornament traits. It was hypothesised that POPs may have endocrine disrupting effects on the local house sparrow population and can thus interfere with the steroid hormone homeostasis. Among female house sparrows, bivariate correlations revealed negative relationships between POPs and estrogens. Among male sparrows, positive relationships between dihydrotestosterone levels and PCBs were observed. In males, positive relationships were also found between steroids and beak length, and between steroids and ornamental traits such as total badge size. This was confirmed by a significant OPLS model between beak length and steroids. Although sparrows are in the mid-range trophic levels, the present study indicates that POPs may affect steroid homeostasis in house sparrows, in particular for females. For males, circulating steroid levels appears to be more associated with biometric parameters related to ornamental traits.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.titleSteroids in house sparrows (Passer domesticus): Effects of POPs and male quality signallingnb_NO
dc.typeJournal articlenb_NO
dc.description.versionsubmittedVersionnb_NO
dc.source.pagenumber295-304nb_NO
dc.source.volume547nb_NO
dc.source.journalScience of the Total Environmentnb_NO
dc.identifier.doi10.1016/j.scitotenv.2015.12.113
dc.identifier.cristin1320674
dc.relation.projectNorges forskningsråd: 223257nb_NO
dc.relation.projectNorges forskningsråd: 221956nb_NO
dc.relation.projectNorges forskningsråd: 204303nb_NO
dc.description.localcodeThis is a submitted manuscript of an article published by Elsevier Ltd in Science of the Total Environment, 12 January 2016.nb_NO
cristin.unitcode194,66,10,0
cristin.unitnameInstitutt for biologi
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode2


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