Osmoregulation by Adélie Penguin Chicks on the Antarctic Peninsula

The Auk ◽  
1997 ◽  
Vol 114 (3) ◽  
pp. 488-495 ◽  
Author(s):  
Donald N. Janes
Keyword(s):  
Antarctic Peninsula ◽  
Adélie Penguin ◽  
Adelie Penguin ◽  
The Antarctic

A 1000-year record of Adélie penguin diets in the southern Ross Sea

2002 ◽  
Vol 14 (4) ◽  
pp. 327-332 ◽  
Author(s):  
MICHAEL POLITO ◽  
STEVEN D. EMSLIE ◽  
WILLIAM WALKER
Keyword(s):  
Ross Sea ◽  
Prey Selection ◽  
Ice Age ◽  
Adélie Penguin ◽  
Pleuragramma Antarcticum ◽  
Adelie Penguin ◽  
Radiocarbon Dates ◽  
Antarctic Silverfish ◽  
The Antarctic

Non-krill prey remains were recovered from ornithogenic sediments at three active Adélie penguin colonies on Ross Island, to assess long-term dietary trends in this species. Radiocarbon dates place the age of these deposits from a maximum of 947 years ago to the present. We identified 12 taxa of fish and two of squid with the Antarctic silverfish (Pleuragramma antarcticum) as the most abundant prey species represented at all sites. In addition, silverfish have decreased in importance in Adélie penguin diet over the past 600 years, perhaps in response to climate change since the onset of the Little Ice Age, though it remains much more abundant in current penguin diet in the Ross Sea than in the Antarctic Peninsula. Other prey taxa reflect the diversity of prey selection by Adélie penguins in Antarctica.

scholarly journals Identification of Circovirus Genome in a Chinstrap Penguin (Pygoscelis antarcticus) and Adélie Penguin (Pygoscelis adeliae) on the Antarctic Peninsula

Viruses ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 858 ◽  
Author(s):  
Hila Levy ◽  
Steven R. Fiddaman ◽  
Anni Djurhuus ◽  
Caitlin E. Black ◽  
Simona Kraberger ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Chinstrap Penguin ◽  
East Antarctica ◽  
Western Antarctic Peninsula ◽  
Adélie Penguin ◽  
Pygoscelis Adeliae ◽  
Adelie Penguin ◽  
Pygoscelis Antarcticus ◽  
Genome Wide ◽  
Adélie Penguins

Circoviruses infect a variety of animal species and have small (~1.8–2.2 kb) circular single-stranded DNA genomes. Recently a penguin circovirus (PenCV) was identified associated with an Adélie Penguin (Pygoscelis adeliae) with feather disorder and in the cloacal swabs of three asymptomatic Adélie Penguins at Cape Crozier, Antarctica. A total of 75 cloacal swab samples obtained from adults and chicks of three species of penguin (genus: Pygoscelis) from seven Antarctic breeding colonies (South Shetland Islands and Western Antarctic Peninsula) in the 2015−2016 breeding season were screened for PenCV. We identified new variants of PenCV in one Adélie Penguin and one Chinstrap Penguin (Pygoscelis antarcticus) from Port Charcot, Booth Island, Western Antarctic Peninsula, a site home to all three species of Pygoscelid penguins. These two PenCV genomes (length of 1986 nucleotides) share > 99% genome-wide nucleotide identity with each other and share ~87% genome-wide nucleotide identity with the PenCV sequences described from Adélie Penguins at Cape Crozier ~4400 km away in East Antarctica. We did not find any evidence of recombination among PenCV sequences. This is the first report of PenCV in Chinstrap Penguins and the first detection outside of Ross Island, East Antarctica. Given the limited knowledge on Antarctic animal viral diversity, future samples from Antarctic wildlife should be screened for these and other viruses to determine the prevalence and potential impact of viral infections.

Adélie penguin population changes at Stranger Point: 19 years of monitoring

2015 ◽  
Vol 27 (5) ◽  
pp. 455-461 ◽  
Author(s):  
Mariana A. Juáres ◽  
Mercedes Santos ◽  
Javier Negrete ◽  
Jorge A. Mennucci ◽  
Pablo J. Perchivale ◽  
...  
Keyword(s):  
Breeding Success ◽  
Breeding Population ◽  
Adélie Penguin ◽  
Temporal Fluctuation ◽  
Pygoscelis Adeliae ◽  
Adelie Penguin ◽  
Interannual Fluctuations ◽  
New Recruits ◽  
The Antarctic ◽  
Future Population

AbstractThe Adélie penguin (Pygoscelis adeliae) breeding population at Stranger Point, King George Island (25 de Mayo), increased in number from 1965/66 until 1980/81 after which it started to decrease almost continuously up to the present. A significant decrease in the number of breeding pairs and chicks crèched was observed between 1995/96 and 2013/14 (75% and 78%, respectively), although the rate of this decrease has slowed since 2006/07. Over the last seven years, larger interannual fluctuations were recorded in the number of breeding pairs and chicks in crèches, as well in the breeding success. The values for the index of breeding success during 2007/08, 2009/10 and 2012/13 were low and this parameter showed higher temporal fluctuation in the period 2007/08 to 2013/14. The reduction in breeding success and the number of chicks reared to crèche will unfavourably impact on future population size at Stranger Point through the reduction of new recruits. Although Adélie penguin population trends on the Antarctic Peninsula are linked to the marine environment variability (i.e. reduction in sea ice affecting the availability of prey), breeding success is also influenced by the amount of snow fall which has increased in recent years.

Short Note: First report of Cryptosporidium spp. oocysts in stool of Adélie penguin from the Antarctic using acid-fast stain

2007 ◽  
Vol 19 (4) ◽  
pp. 437-438 ◽  
Author(s):  
Fernando Fredes ◽  
Eduardo Raffo ◽  
Pamela Muñoz
Keyword(s):  
Digestive Tract ◽  
Short Note ◽  
Adélie Penguin ◽  
Intracellular Parasite ◽  
Laboratory Mice ◽  
Adelie Penguin ◽  
Animal Groups ◽  
First Report ◽  
Cryptosporidium Spp ◽  
The Antarctic

Cryptosporidium is an intracellular parasite that belongs to the phylum Protozoa and subphylum Apicomplexa (Sporozoa). It was first described by from the digestive tract of laboratory mice (Garcia 2001), and has been found in several animal groups including fishes, reptiles, birds and mammals, including humans (Jellison et al. 2002).

Sign in / Sign up

Export Citation Format

Share Document