| biogenic and toxic elements in feathers, eggs, and excreta of gentoo penguin (pygoscelis papua ellsworthii) in the antarctic. | feathers, eggs, and excreta of gentoo penguin (pygoscelis papua ellsworthii), adults, from livingston island (south shetlands), chosen as bioindicators, were used to test the quality of the antarctic environment. sex was not examined. the bioaccumulations of toxic trace elements (cd, pb, al, and as), essential trace elements (fe, cu, zn, mn, cr, v, ni, and sr), and major essential elements (na, k, mg, ca, p, and s) were established. for the first time data about the element contents in gentoo eg ... | 2011 | 21340549 |
| a reversal of fortunes: climate change 'winners' and 'losers' in antarctic peninsula penguins. | climate change is a major threat to global biodiversity. antarctic ecosystems are no exception. investigating past species responses to climatic events can distinguish natural from anthropogenic impacts. climate change produces 'winners', species that benefit from these events and 'losers', species that decline or become extinct. using molecular techniques, we assess the demographic history and population structure of pygoscelis penguins in the scotia arc related to climate warming after the las ... | 2014 | 24865774 |
| population size and decadal trends of three penguin species nesting at signy island, south orkney islands. | we report long-term changes in population size of three species of sympatrically breeding pygoscelid penguins: adélie (pygoscelis adeliae), chinstrap (pygoscelis antarctica) and gentoo (pygoscelis papua ellsworthii) over a 38 year period at signy island, south orkney islands, based on annual counts from selected colonies and decadal all-island systematic counts of occupied nests. comparing total numbers of breeding pairs over the whole island from 1978/79 to 2015/16 revealed varying fortunes: ge ... | 2016 | 27783668 |