South Polar Skua breeding populations in the Ross Sea assessed from demonstrated relationship with Adélie Penguin numbers

Polar Biology ◽  
2016 ◽  
Vol 40 (3) ◽  
pp. 577-592 ◽  
Author(s):  
Deborah J. Wilson ◽  
Philip O’B. Lyver ◽  
Terry C. Greene ◽  
Amy L. Whitehead ◽  
Katie M. Dugger ◽  
...  
Keyword(s):  
Ross Sea ◽  
Adélie Penguin ◽  
Adelie Penguin ◽  
South Polar Skua ◽  
Breeding Populations ◽  
South Polar

scholarly journals Penguins Strike Back: A Report on the Unusual Case of Adélie Penguin (Pygoscelis adeliae) Attacks on South Polar Skua Nests Distant from the Breeding Colony

Diversity ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 181
Author(s):  
Youmin Kim ◽  
Jong-U Kim ◽  
Hosung Chung ◽  
Yeon-Soo Oh ◽  
Young-Geun Oh ◽  
...  
Keyword(s):  
Unusual Case ◽  
Adélie Penguin ◽  
Pygoscelis Adeliae ◽  
Breeding Colony ◽  
Adelie Penguin ◽  
South Polar Skua ◽  
Colonial Seabirds ◽  
South Polar

Colonial seabirds use various methods to defend their nests from predators [...]

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 Notes on the Incubation of an Adelie Penguin Egg by a pair of South Polar Skuas

1982 ◽  
Vol 30 (4) ◽  
pp. 163-164
Author(s):  
Yasuomi TAMIYA ◽  
Masahiro AOYANAGI
Keyword(s):  
Adélie Penguin ◽  
Adelie Penguin ◽  
South Polar

scholarly journals Gone fishing: Adélie penguin site-specific foraging tactics and breeding performance

2020 ◽  
Vol 32 (3) ◽  
pp. 199-209
Author(s):  
Silvia Olmastroni ◽  
Niccolò Fattorini ◽  
Francesco Pezzo ◽  
Silvano Focardi
Keyword(s):  
Ross Sea ◽  
Weather Conditions ◽  
High Energy ◽  
Adélie Penguin ◽  
Breeding Performance ◽  
Local Conditions ◽  
Seabird Species ◽  
Adelie Penguin ◽  
Breeding Parameters ◽  
Trade Offs

AbstractThe ecological drivers underlying breeding performance are expected to differ across the geographical range of seabird species, but few studies have compared trade-offs between colonies with different local conditions. During chick-rearing (2000–01), we compared the foraging trips, diet and breeding parameters of two Adélie penguin colonies in the Ross Sea, at Edmonson Point (EdPo; ~2000 breeding pairs) and Inexpressible Island (InIs; ~24 000 breeding pairs). Penguins from InIs travelled farther and performed longer feeding trips. The quantity of food brought to the nest was the same for the two colonies, but penguins from InIs brought more fish and less krill. Eggs hatched earlier at EdPo. Breeding success did not differ, but chick weight during hatching–fledging was greater at InIs. Despite worse weather conditions at InIs, the larger proportion of high-energy food brought by penguins from InIs (i.e. fish) may explain their offspring‘s better performance. In addition, the persistence of fast ice at EdPo may have led to greater energy expenditure of breeding individuals, possibly reducing chick growth. The greater intraspecific competition expected at InIs may have been reduced by longer foraging trips and/or counteracted by the more nutritious diet. Our findings reveal complex trade-offs between foraging effort and environmental constraints in determining the breeding performance of Adélie penguins.

Adélie penguin dietary remains reveal Holocene environmental changes in the western Ross Sea (Antarctica)

2014 ◽  
Vol 395 ◽  
pp. 21-28 ◽  
Author(s):  
Sandra Lorenzini ◽  
Carlo Baroni ◽  
Ilaria Baneschi ◽  
Maria Cristina Salvatore ◽  
Anthony E. Fallick ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Ross Sea ◽  
Adélie Penguin ◽  
Adelie Penguin ◽  
Western Ross Sea

Isomer-specific analysis and toxic potential evaluation of polychlorinated biphenyls in Antarctic fish, seabirds and Weddell seals from Terra Nova Bay (Ross Sea)

1995 ◽  
Vol 7 (1) ◽  
pp. 31-35 ◽  
Author(s):  
S. Focardi ◽  
R. Bargagli ◽  
S. Corsolini
Keyword(s):  
Polychlorinated Biphenyls ◽  
Antarctic Fish ◽  
Weddell Seal ◽  
The South ◽  
Adelie Penguin ◽  
South Polar Skua ◽  
Terra Nova Bay ◽  
Terra Nova ◽  
Toxic Potential ◽  
South Polar

To provide data on the degree of contamination of the marine ecosystem isomer-specific concentrations of polychlorinated biphenyls, including planar, mono- and di-ortho congeners, were measured in the Weddell seal, the Adélie penguin, the south polar skua, and in two species of Antarctic fish (Trematomus bernacchii and Chionodraco hamatus) from Terra Nova Bay, Antarctica. The results show a clear relation between PCB concentrations and trophic level, in the order fish < Adélie penguin < Weddell seal. The higher values found in the skua appear to be related to its migration to more contaminated lower latitudes. The data for the various PCB congeners were used to calculate toxic potential in the different animals. The 2,3,7,8-TCDD toxic equivalents of coplanar congeners were estimated by the “toxic equivalent factors” (TEFs) approach. The highest values of TEFs were found in the south polar skua and Weddell seal. Values in the other species were considerably lower.

scholarly journals Factors driving Adélie penguin chick size, mass and condition at colonies of different sizes in the Southern Ross Sea

2015 ◽  
Vol 523 ◽  
pp. 199-213 ◽  
Author(s):  
AL Whitehead ◽  
PO’B Lyver ◽  
G Ballard ◽  
K Barton ◽  
BJ Karl ◽  
...  
Keyword(s):  
Ross Sea ◽  
Adélie Penguin ◽  
Adelie Penguin ◽  
Chick Size

Spatial relationships of Adélie penguin colonies: implications for assessing population changes from remote imagery

1998 ◽  
Vol 10 (4) ◽  
pp. 449-454 ◽  
Author(s):  
Eric J. Woehler ◽  
Martin J. Riddle
Keyword(s):  
Population Density ◽  
Ross Sea ◽  
Aerial Photographs ◽  
Adélie Penguin ◽  
Pygoscelis Adeliae ◽  
Data Set ◽  
Adelie Penguin ◽  
Pair Density ◽  
The Relationship ◽  
Colony Area

The relationship between colony area and population density of Adélie penguins Pygoscelis adeliae was examined to determine whether colony area, measured from aerial or satellite imagery, could be used to estimate population density, and hence detect changes in populations over time. Using maps drawn from vertical aerial photographs of Adélie penguin colonies in the Mawson region, pair density ranged between 0.1 and 3.1 pairs m−2, with a mean of 0.63 ± 0.3 pairs m−2. Colony area explained 96.4% of the variance in colony populations (range 90.4–99.6%) for 979 colonies at Mawson. Mean densities were not significantly different among the 19 islands in the region, but significant differences in mean pair density were observed among colonies in Mawson, Whitney Point (Casey, East Antarctica) and Cape Crozier (Ross Sea) populations. The relationship between colony area and population may be locality-and/or species-specific, and a robust data set is required to validate the relationship.

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