| genetic isolation and divergence in sexual traits: evidence for the northern rockhopper penguin eudyptes moseleyi being a sibling species. | the taxonomic status of populations of rockhopper penguins (eudyptes chrysocome) is still enigmatic. northern populations differ from southern ones in breeding phenology, song characteristics and head ornaments used as mating signals. we conducted a molecular analysis using mitochondrial dna sequencing to test if there is a gene flow barrier between northern (subtropical) populations and southern (subantarctic) populations in relation to the subtropical convergence, a major ecological boundary f ... | 2006 | 16968279 |
| 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 |
| phylogeography, population structure, and species delimitation in rockhopper penguins (eudyptes chrysocome and eudyptes moseleyi). | rockhopper penguins are delimited as 2 species, the northern rockhopper (eudyptes moseleyi) and the southern rockhopper (eudyptes chrysocome), with the latter comprising 2 subspecies, the western rockhopper (eudyptes chrysocome chrysocome) and the eastern rockhopper (eudyptes chrysocome filholi). we conducted a phylogeographic study using multilocus data from 114 individuals sampled across 12 colonies from the entire range of the northern/southern rockhopper complex to assess potential populatio ... | 2019 | 31737899 |
| comparative personality traits assessment of three species of communally housed captive penguins. | understanding animal personalities has notable implications in the ecology and evolution of animal behavior, but personality studies can also be useful in optimizing animal management, with the aim of improving health and well-being, and optimizing reproductive success, a fundamental factor in the species threatened with extinction. modern zoos are increasingly being structured with enclosures that host different species, which permanently share spaces. this condition has undeniable positive asp ... | 2019 | 31226801 |
| suspected hypovitaminosis a-associated salt gland adenitis in northern rockhopper penguins ( eudyptes moseleyi). | supraorbital salt-excreting glands are present in at least 10 avian orders and are largest in marine species, including penguins. diseases of the avian salt gland have been described infrequently. from september 2015, five captive northern rockhopper penguins ( eudyptes moseleyi) were presented over a 6-wk period for unilateral or bilateral supraorbital swellings. in september 2016, two cases recurred and two additional cases were identified. histopathology demonstrated salt gland adenitis with ... | 2018 | 29900787 |
| avian cholera outbreaks threaten seabird species on amsterdam island. | infectious diseases may be particularly critical for the conservation of endangered species. a striking example is the recurrent outbreaks that have been occurring in seabirds on amsterdam island for the past 30 years, threatening populations of three endangered seabird species and of the endemic, critically endangered amsterdam albatross diomedea amsterdamensis. the bacteria pasteurella multocida (avian cholera causative agent), and to a lesser extent erysipelothrix rhusiopathiae (erysipelas ca ... | 2018 | 29847561 |