Variability in krill biomass links harvesting and climate warming to penguin population changes in Antarctica

WZ Trivelpiece, JT Hinke, AK Miller… - Proceedings of the …, 2011 - National Acad Sciences
The West Antarctic Peninsula (WAP) and adjacent Scotia Sea support abundant wildlife
populations, many of which were nearly extirpated by humans. This region is also among …

Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming?

WR Fraser, WZ Trivelpiece, DG Ainley, SG Trivelpiece - Polar biology, 1992 - Springer
A central tenet of Antarctic ecology suggests that increases in Chinstrap Penguin
(Pygoscelis antarctica) populations during the last four decades resulted from an increase in …

Contrasting population changes in sympatric penguin species in association with climate warming

J Forcada, PN Trathan, K Reid, EJ Murphy… - Global Change …, 2006 - Wiley Online Library
Climate warming and associated sea ice reductions in Antarctica have modified habitat
conditions for some species. These include the congeneric Adélie, chinstrap and gentoo …

Antarctic penguin response to habitat change as Earth's troposphere reaches 2 C above preindustrial levels

D Ainley, J Russell, S Jenouvrier… - Ecological …, 2010 - Wiley Online Library
We assess the response of pack ice penguins, Emperor (Aptenodytes forsteri) and Adélie
(Pygoscelis adeliae), to habitat variability and, then, by modeling habitat alterations, the …

Foraging behavior links sea ice to breeding success in Antarctic penguins

YY Watanabe, K Ito, N Kokubun, A Takahashi - Science Advances, 2020 - science.org
Population trends and breeding success variability of Adélie penguins, a bioindicator of
Antarctic environments, have been attributed to changing sea-ice extents; however …

Competition among penguins and cetaceans reveals trophic cascades in the western Ross Sea, Antarctica

DG Ainley, G Ballard, KM Dugger - Ecology, 2006 - Wiley Online Library
An apparent trophic cascade that appears during summer in the western Ross Sea,
Antarctica, explains why the Antarctic silverfish (Pleuragramma antarcticum) there becomes …

Adélie penguin population change in the pacific sector of Antarctica: relation to sea-ice extent and the Antarctic Circumpolar Current

PR Wilson, DG Ainley, N Nur, SS Jacobs… - … ecology progress series, 2001 - int-res.com
One of the longest continuing data sets involving a marine organism in the Antarctic is that of
annual estimates of breeding population size of Adélie penguins Pygoscelis adeliae at …

Spatially integrated assessment reveals widespread changes in penguin populations on the Antarctic Peninsula

HJ Lynch, R Naveen, PN Trathan, WF Fagan - Ecology, 2012 - Wiley Online Library
As important marine mesopredators and sensitive indicators of Antarctic ecosystem change,
penguins have been a major focus of long‐term biological research in the Antarctic …

Antarctic krill fishery effects over penguin populations under adverse climate conditions: Implications for the management of fishing practices

L Krüger, MF Huerta, F Santa Cruz, CA Cárdenas - Ambio, 2021 - Springer
Fast climate changes in the western Antarctic Peninsula are reducing krill density, which
along with increased fishing activities in recent decades, may have had synergistic effects …

A global population assessment of the Chinstrap penguin (Pygoscelis antarctica)

N Strycker, M Wethington, A Borowicz, S Forrest… - Scientific Reports, 2020 - nature.com
Using satellite imagery, drone imagery, and ground counts, we have assembled the first
comprehensive global population assessment of Chinstrap penguins (Pygoscelis antarctica) …