| is wales ready for the reintroduction of eagles? | georgina mills discusses research on wales' suitability as the home for golden and white-tailed eagles. | 2019 | 30819855 |
| allelic diversity and selection at the mhc class i and class ii in a bottlenecked bird of prey, the white-tailed eagle. | genes of the major histocompatibility complex (mhc) are essential for adaptive immune response in vertebrates, as they encode receptors that recognize peptides derived from the processing of intracellular (mhc class i) and extracellular (mhc class ii) pathogens. high mhc diversity in natural populations is primarily generated and maintained by pathogen-mediated diversifying and balancing selection. it is, however, debated whether selection at the mhc can counterbalance the effects of drift in bo ... | 2019 | 30611206 |
| plasma concentrations of organohalogenated contaminants in white-tailed eagle nestlings - the role of age and diet. | concentrations of organohalogenated contaminants (ohcs) can show significant temporal and spatial variation in the environment and wildlife. most of the variation is due to changes in use and production, but environmental and biological factors may also contribute to the variation. nestlings of top predators are exposed to maternally transferred ohcs in the egg and through their dietary intake after hatching. the present study investigated spatial and temporal variation of ohcs and the role of a ... | 2019 | 30583161 |
| characterization of function and genetic feature of udp-glucuronosyltransferase in avian species. | birds are exposed to many xenobiotics during their lifetime. for accurate prediction of xenobiotic-induced toxic effects on avian species, it is necessary to understand metabolic capacities in a comprehensive range of bird species. however, there is a lack of information about avian xenobiotic metabolizing enzymes (xmes), particularly in wild birds. uridine diphosphate glucuronosyltransferase (ugt) is an xme that plays an important role in phase ii metabolism in the livers of mammals and birds. ... | 2019 | 30476594 |
| white-tailed sea eagle (haliaeetus albicilla) die-off due to infection with highly pathogenic avian influenza virus, subtype h5n8, in germany. | in contrast to previous incursions of highly pathogenic avian influenza (hpaiv) h5 viruses, h5n8 clade 2.3.4.4b viruses caused numerous cases of lethal infections in white-tailed sea eagles (haliaeetus albicilla) affecting mainly young eagles (younger than five years of age) in germany during winter 2016/2017. until april 2017, 17 hpaiv h5n8-positive white-tailed sea eagles had been detected (three found alive and 14 carcasses) by real-time rt-pcr and partial nucleotide sequence analyses. severe ... | 2018 | 30205456 |
| white-tailed eagle (haliaeetus albicilla) feathers from norway are suitable for monitoring of legacy, but not emerging contaminants. | while feathers have been successfully validated for monitoring of internal concentrations of heavy metals and legacy persistent organic pollutants (pops), less is known about their suitability for monitoring of emerging contaminants (ecs). our study presents a broad investigation of both legacy pops and ecs in non-destructive matrices from a bird of prey. plasma and feathers were sampled in 2015 and 2016 from 70 whitetailed eagle (haliaeetus albicilla) nestlings from two archipelagos in norway. ... | 2019 | 30089276 |
| sex-specific patterns of reproductive senescence in a long-lived reintroduced raptor. | for many species, there is evidence that breeding performance changes as an individual ages. in iteroparous species, breeding performance often increases through early life and is expected to level out or even decline (senesce) later in life. an individual's sex and conditions experienced in early life may also affect breeding performance and how this changes with age. long-term monitoring of individuals from reintroduced populations can provide unique opportunities to explore age-related trends ... | 2018 | 29975797 |
| to breed or not to breed: drivers of intermittent breeding in a seabird under increasing predation risk and male bias. | intermittent breeding may be adaptive for long-lived species subjected to large accessory reproductive costs, but it may also reflect reduced adaptation to the environment, reducing population growth. nevertheless, environmental influences on breeding propensity, particularly that of predation risk, remain poorly understood and difficult to study, because non-breeders are typically not identified. female eiders somateria mollissima from the baltic sea provide an excellent testbed, because nestin ... | 2018 | 29858692 |
| lead poisoning and other human-related factors cause significant mortality in white-tailed eagles. | the white-tailed eagle (haliaeetus albicilla) suffered a severe population decline due to environmental pollutants in the baltic sea area ca. 50 years ago but has since been recovering. the main threats for the white-tailed eagle in finland are now often related to human activities. we examined the human impact on the white-tailed eagle by determining mortality factors of 123 carcasses collected during 2000-2014. routine necropsy with chemical analyses for lead and mercury were done on all carca ... | 2018 | 29600487 |
| using field data to quantify chemical impacts on wildlife population viability. | environmental pollution is an important driver of biodiversity loss. yet, to date, the effects of chemical exposure on wildlife populations have been quantified for only a few species, mainly due to a lack of appropriate laboratory data to quantify chemical impacts on vital rates. in this study, we developed a method to quantify the effects of toxicant exposure on wildlife population persistence based on field monitoring data. we established field-based vital-rate-response functions for toxicant ... | 2018 | 29336512 |