{"id":118511,"date":"2026-09-11T21:19:10","date_gmt":"2026-09-11T19:19:10","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/polychlorinated-biphenyl-exposure-and-corticosterone-levels-in-seven-polar-seabird-species\/"},"modified":"2026-09-11T21:19:10","modified_gmt":"2026-09-11T19:19:10","slug":"polychlorinated-biphenyl-exposure-and-corticosterone-levels-in-seven-polar-seabird-species","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/polychlorinated-biphenyl-exposure-and-corticosterone-levels-in-seven-polar-seabird-species\/","title":{"rendered":"Polychlorinated biphenyl exposure and corticosterone levels in seven polar seabird species"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The role of polychlorinated biphenyls (PCBs) on exposure-related endocrine effects has been poorly<br \/>\ninvestigated in wild birds. This is the case for stress hormones including corticosterone (CORT). Some<br \/>\nstudies have suggested that environmental exposure to PCBs and altered CORT secretion might be<br \/>\nassociated. Here we investigated the relationships between blood PCB concentrations and circulating<br \/>\nCORT levels in seven free-ranging polar seabird species occupying different trophic positions, and hence<br \/>\ncovering a wide range of PCB exposure. Blood P7PCB concentrations (range: 61e115,632 ng\/g lw) were<br \/>\npositively associated to baseline or stress-induced CORT levels in three species and negatively associated<br \/>\nto stress-induced CORT levels in one species. Global analysis suggests that in males, baseline CORT levels<br \/>\ngenerally increase with increasing blood P7PCB concentrations, whereas stress-induced CORT levels<br \/>\ndecrease when reaching high blood P7PCB concentrations. This study suggests that the nature of the<br \/>\nPCB-CORT relationships may depend on the level of PCB exposure.<br \/>\nArctic<br \/>\nAntarctic<br \/>\nBirds<br \/>\nPCBs<br \/>\nGlucocorticoids<br \/>\nStress<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 21:16:47","footnotes":""},"nva_tax_category":[1099],"class_list":["post-118511","nva_publication","type-nva_publication","status-publish","hentry","nva_tax_category-scientific-journal-publication"],"acf":[],"_links":{"self":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/118511","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication"}],"about":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/types\/nva_publication"}],"version-history":[{"count":0,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/118511\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=118511"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=118511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}