associations between persistent organic pollutants and vitamin status in brünnich's guillemot and common eider hatchlings.the aim of the study was to examine associations between persistent organic pollutants and vitamin a (retinol), retinyl palmitate and vitamin e status (alpha-tocopherol) in two species occupying different trophic positions in the arctic food web. levels of polychlorinated biphenyls (pcbs), some selected organochlorine pesticides (ocps), polybrominated diphenyl ethers (pbdes) and hexabromocyclododecane (hbcd) were analyzed in yolk sac of newly hatched chicks of brünnich's guillemot (uria lomvia) ...200717467774
hidden survival heterogeneity of three common eider populations in response to climate fluctuations.understanding how individuals and populations respond to fluctuations in climatic conditions is critical to explain and anticipate changes in ecological systems. most such studies focus on climate impacts on single populations without considering inter- and intra-population heterogeneity. however, comparing geographically dispersed populations limits the risk of faulty generalizations and helps to improve ecological and demographic models. we aimed to determine whether differences in migration t ...201728127765
seasonal variation in accumulation of persistent organic pollutants in an arctic marine benthic food web.the aim of the present study was to investigate seasonal variation in persistent organic pollutant (pop) concentrations, as well as food-web biomagnification, in an arctic, benthic marine community. macrozoobenthos, demersal fish and common eiders were collected both inside and outside of kongsfjorden, svalbard, during may, july and october 2007. the samples were analysed for a selection of legacy chlorinated pops. overall, low levels of pops were measured in all samples. although pop levels and ...201626519572
the development of homeothermy in common eider ducklings (somateria mollissima).oxygen consumption (vo2), body temperature (tb) and electric muscle activity (emg) were measured at varying ambient temperatures (ta) in common eider ducklings from the eggs pipped to 1 day after hatching. eggs at pipping and ducklings still wet from hatching doubled their vo2 at ta = 2-4 degrees c compared with ta = 27 degrees c, but were unable to maintain constant tb. increased emg activity was recorded from ducklings 30 min after hatching. artificially dried 1-h-old ducklings maintained norm ...19883227894
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