| more than the eye can see: genomic insights into the drivers of genetic differentiation in royal/macaroni penguins across the southern ocean. | the study of systematics in wide-ranging seabirds can be challenging due to the vast geographic scales involved, as well as the possible discordance between molecular, morphological and behavioral data. in the southern ocean, macaroni penguins (eudyptes chrysolophus) are distributed over a circumpolar range including populations in antarctic and sub-antarctic areas. macquarie island, in its relative isolation, is home to a closely related endemic taxon - the royal penguin (eudyptes schlegeli), w ... | 2019 | 31323335 |
| temporal and interspecific variation in feather mercury in four penguin species from macquarie island, australia. | we measured mercury (hg) concentrations in feathers from four penguin species collected on macquarie island, southern ocean, to 1) establish baseline hg concentrations; and 2) compare hg from samples collected in 2002 ("modern") and from museum specimens collected between 1937 and 1976 ("historic"). inter-specific differences in feather hg reflected known differences in habitats and diversity of diets: benthic-foraging gentoo penguins and rockhopper penguins that foraged both inshore and offshor ... | 2019 | 31232305 |
| long-term breeding phenology shift in royal penguins. | the earth's climate is undergoing rapid warming, unprecedented in recent times, which is driving shifts in the distribution and phenology of many plants and animals. quantifying changes in breeding phenology is important for understanding how populations respond to these changes. while data on shifts in phenology are common for northern hemisphere species (especially birds), there is a dearth of evidence from the southern hemisphere, and even fewer data available from the marine environment. sur ... | 2012 | 22957162 |
| colony sound facilitates sexual and agonistic activities in royal penguins. | a unique playback system was used to exaggerate continuously the number of calls heard in royal penguin, eudyptes schlegeli, colonies to determine whether social facilitation increases a female's exposure to both sexual and agonistic activities, a process that could influence the timing of reproduction in colonies. we also determined whether the source of colony sound or the phase of the breeding cycle influenced the facilitation of sexual or agonistic activities. the system recorded and then pl ... | 2000 | 10924206 |
| a global overview of exposure levels and biological effects of trace elements in penguins. | trace elements are chemical contaminants that can be present almost anywhere on the planet. the study of trace elements in biotic matrices is a topic of great relevance for the implications that it can have on wildlife and human health. penguins are very useful, since they live exclusively in the southern hemisphere and represent about 90% of the biomass of birds of the southern ocean. the levels of trace elements (dry weight) in different biotic matrices of penguins were reviewed here. maps of ... | 2018 | 29079931 |