| effect of diet, location and sampling year on bioaccumulation of mercury, selenium and cadmium in pelagic feeding seabirds in svalbard. | hepatic concentrations of mercury (hg), selenium (se) and cadmium (cd) were determined in black-legged kittiwakes (rissa tridactyla) and little auks (alle alle) from two fjords in svalbard (kongsfjorden; 78°57'n, 12°12'e and liefdefjorden; 79°37'n, 13°20'e). the inflow of arctic and atlantic water differs between the two fjords, potentially affecting element accumulation. trophic positions (tp) were derived from stable nitrogen isotope ratios (δ(15)n), and stable carbon isotope ratios (δ(13)c) w ... | 2015 | 25441931 |
| exposure to oxychlordane is associated with shorter telomeres in arctic breeding kittiwakes. | telomeres are dna-protein complexes located at the end of chromosomes, which play an important role in maintaining the genomic integrity. telomeres shorten at each cell division and previous studies have shown that telomere length is related to health and lifespan and can be affected by a wide range of environmental factors. among them, some persistent organic pollutants (pops) have the potential to damage dna. however, the effect of pops on telomeres is poorly known for wildlife. here, we inves ... | 2016 | 27135574 |
| differential reproductive responses to stress reveal the role of life-history strategies within a species. | life-history strategies describe that 'slow'- in contrast to 'fast'-living species allocate resources cautiously towards reproduction to enhance survival. recent evidence suggests that variation in strategies exists not only among species but also among populations of the same species. here, we examined the effect of experimentally induced stress on resource allocation of breeding seabirds in two populations with contrasting life-history strategies: slow-living pacific and fast-living atlantic b ... | 2013 | 24089339 |