The Supraorbital Glands of Pygoscelid Penguins

1975 ◽  
pp. 85-99 ◽  
Author(s):  
Colin F. Herbert
Keyword(s):  
Pygoscelid Penguins

Diet, antioxidants and oxidative status in pygoscelid penguins

2021 ◽  
Author(s):  
R Colominas-Ciuró ◽  
M Bertellotti ◽  
VL D’Amico ◽  
E Carabajal ◽  
J Benzal ◽  
...  
Keyword(s):  
Oxidative Status ◽  
Pygoscelid Penguins

Leukocyte counts in different populations of Antarctic Pygoscelid penguins along the Antarctic Peninsula

Polar Biology ◽  
2015 ◽  
Vol 39 (2) ◽  
pp. 199-206 ◽  
Author(s):  
Verónica L. D’Amico ◽  
Bertellotti Marcelo ◽  
Jesús Benzal ◽  
Néstor Coria ◽  
Virginia Vidal ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Leukocyte Counts ◽  
Different Populations ◽  
The Antarctic ◽  
Pygoscelid Penguins

Intertidal foraging by gentoo penguins in a macroalgal raft

2020 ◽  
Vol 32 (1) ◽  
pp. 43-44
Author(s):  
James B. McClintock ◽  
Charles D. Amsler ◽  
Margaret O. Amsler ◽  
William R. Fraser
Keyword(s):  
Environmental Change ◽  
Foraging Behaviour ◽  
Foraging Strategy ◽  
Foraging Strategies ◽  
Marion Island ◽  
Pygoscelis Papua ◽  
General Consensus ◽  
Foraging Tactics ◽  
Pygoscelid Penguins ◽  
Foraging Tactic

Foraging strategies in gentoo penguins (Pygoscelis papua) have been well studied (e.g. Croxall et al. 1988, Robinson & Hindell 1996, Lescroël et al. 2004, Takahashi et al. 2008, Xavier et al. 2017). The general consensus is this largest member of the three pygoscelid penguins displays both nearshore benthic and pelagic foraging tactics to consume combinations of crustaceans and fish. In a recent study, Carpenter-Kling et al. (2017) reported that gentoos at sub-Antarctic Marion Island displayed a novel foraging strategy that consisted of alternating typical lengthy foraging trips with much shorter nearshore afternoon trips. They suggest the latter foraging behaviour may be a response to suboptimal feeding conditions caused by local environmental change. This novel discovery reinforces the fact that, despite considerable study, not all foraging tactics in penguins have been documented. In this paper, we describe what we believe to be, yet another undocumented foraging tactic employed by gentoos.

scholarly journals Integrating Stomach Content and Stable Isotope Analyses to Quantify the Diets of Pygoscelid Penguins

PLoS ONE ◽  
2011 ◽  
Vol 6 (10) ◽  
pp. e26642 ◽  
Author(s):  
Michael J. Polito ◽  
Wayne Z. Trivelpiece ◽  
Nina J. Karnovsky ◽  
Elizabeth Ng ◽  
William P. Patterson ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stomach Content ◽  
Stable Isotope Analyses ◽  
Isotope Analyses ◽  
Pygoscelid Penguins

Censuses of penguin, blue-eyed shag, and southern giant petrel populations in the Antarctic Peninsula region, 1994–2000

Polar Record ◽  
2000 ◽  
Vol 36 (199) ◽  
pp. 323-334 ◽  
Author(s):  
Ron Naveen ◽  
Steven C. Forrest ◽  
Rosemary G. Dagit ◽  
Louise K. Blight ◽  
Wayne Z. Trivelpiece ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Census Data ◽  
Population Data ◽  
Gentoo Penguin ◽  
Population Estimates ◽  
Giant Petrel ◽  
Southern Giant Petrel ◽  
The Antarctic ◽  
First Time ◽  
Pygoscelid Penguins

AbstractThis paper presents new census data and population estimates for penguins, blue-eyed shags, and southern giant petrels from 26 sites in the Antarctic Peninsula, collected by the Antarctic Site Inventory from 1994 to 2000. For nine sites, population data or estimates are published for the first time. The newly discovered gentoo penguin population of 215 nests at Herofna Island (63°24'S, 54°36'W) represents the easternmost location where this species has been found breeding in the Peninsula. All three pygoscelid penguins — gentoo, Adelie, and chinstrap — were found breeding at Gourdin Island (63° 12'S, 57° 18'W), the fourth known site where these species nest contiguously in the Peninsula. During the period, significant declines in nesting populations of blue-eyed shag were documented at three northwestern Peninsula locations.

scholarly journals Comparison of Gut Microbiota between Gentoo and Adélie Penguins Breeding Sympatrically on Antarctic Ardley Island as Revealed by Fecal DNA Sequencing

Diversity ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 500
Author(s):  
Yin-Xin Zeng ◽  
Hui-Rong Li ◽  
Wei Han ◽  
Wei Luo
Keyword(s):  
Gut Microbiota ◽  
Dietary Habits ◽  
Operational Taxonomic Unit ◽  
Illumina Miseq ◽  
Diversity Indices ◽  
Rrna Gene ◽  
Fildes Peninsula ◽  
Adélie Penguins ◽  
Penguin Species ◽  
Pygoscelid Penguins

There are two pygoscelid penguins, the Gentoo (Pygoscelis papua Forster, 1781) and Adélie (P. adeliae Hombron and Jacquinot, 1841) penguins, breeding sympatrically on Ardley Island, Fildes Peninsula region, South Shetlands, Antarctica. Whether the two closely related penguin species with similar dietary habits possess compositional similarity in gut microbiota remains unknown. DNA barcoding of feces is an emerging approach for gut microbiota analysis of protected animals. In the present study, the 16S rRNA gene from penguin feces was sequenced using the Illumina MiSeq platform to investigate the gut microbiota of the two pygoscelid penguin species. The fecal community of Gentoo penguins has higher diversity indices and OTU (operational taxonomic unit) richness compared to Adélie penguins. Besides unclassified bacteria, sequences fell into 22 major lineages of the domain Bacteria: Acidobacteria, Actinobacteria, Armatimonadetes, Bacteroidetes, Chlamydiae, Chloroflexi, Cloacimonetes, Cyanobacteria, Deinococcus-Thermus, Fibrobacteres, Firmicutes, Fusobacteria, Gemmatimonadetes, Ignavibacteriae, Planctomycetes, Proteobacteria, Tenericutes, Verrucomicrobia, and candidate divisions BRC1, SR1, WPS-2, and Saccharibacteria. Among these, Firmicutes (37.7%), Proteobacteria (23.1%, mainly Gamma- and Betaproteobacteria), Fusobacteria (14.3%), Bacteroidetes (7.9%), and Actinobacteria (6.6%) were dominant in the fecal microbiota of the two penguin species. At the same time, significantly higher abundances of Actinobacteria and Cyanobacteria were detected in Gentoo penguins than in Adélie penguins (p < 0.05). Overall, there was a clear difference in the composition of gut microbiota between the Adélie and Gentoo penguins. The results suggested that both the phylogeny of penguin species and the diet could be responsible for the differences in the gut microbiota of the two pygoscelid penguins breeding in the same area.

Display Rate and Speed of Nest Relief in Antarctic Pygoscelid Penguins

The Auk ◽  
1980 ◽  
Vol 97 (4) ◽  
pp. 825-831 ◽  
Author(s):  
D. MÜller-Schwarze ◽  
C. MÜller-Schwarze
Keyword(s):  
Repetition Rate ◽  
Gentoo Penguin ◽  
Chinstrap Penguin ◽  
Adélie Penguin ◽  
Adelie Penguin ◽  
Pygoscelid Penguins

Abstract The three species of the genus Pygoscelis, P. adeliae (Adélie Penguin), P. antarctica (Chinstrap Penguin), and P. papua (Gentoo Penguin) perform an elaborate Nest Relief Ceremony (NRC) upon one mate's return to the nest. The NRC consists of a number of displays, each of which is performed one or several times. The most conspicuous displays during NRC are the Loud Mutual Display (LMD) and Quiet Mutual Display (QMD) in P. adeliae and P. antarctica, and their morphologically different functional equivalents in P. papua, the "donkey call" (LMD) and "bow-gape-hiss" (BGH). The displays whose repetition rate is negatively correlated with the time elapsed between arrival of the mate and actual changeover are the LMD in P. adeliae, "circling" in P. antarctica, and BGH in P. papua.

Ornithogenic soils and the paleoecology of pygoscelid penguins in Antarctica

2014 ◽  
Vol 352 ◽  
pp. 4-15 ◽  
Author(s):  
S.D. Emslie ◽  
M.J. Polito ◽  
R. Brasso ◽  
W.P. Patterson ◽  
L. Sun
Keyword(s):  
Ornithogenic Soils ◽  
Pygoscelid Penguins
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