Factors that affect hatching asynchrony in the chinstrap penguin ( Pygoscelis antarctica )

Polar Biology ◽  
2001 ◽  
Vol 24 (5) ◽  
pp. 338-342 ◽  
Author(s):  
Ana de León ◽  
Guillermo Soave ◽  
Vanina Ferretti ◽  
Juan Moreno
Keyword(s):  
Chinstrap Penguin ◽  
Hatching Asynchrony ◽  
Pygoscelis Antarctica

Hatching asynchrony, sibling hierarchies and brood reduction in the Chinstrap penguin Pygoscelis antarctica

Polar Biology ◽  
1994 ◽  
Vol 14 (1) ◽  
Author(s):  
J. Moreno ◽  
L.M. Carrascal ◽  
J.J. Sanz ◽  
J.A. Amat ◽  
J.J. Cuervo
Keyword(s):  
Chinstrap Penguin ◽  
Hatching Asynchrony ◽  
Brood Reduction ◽  
Pygoscelis Antarctica

Experimental assessment of the effects of gastrointestinal parasites on offspring quality in chinstrap penguins (Pygoscelis antarctica)

Parasitology ◽  
2012 ◽  
Vol 139 (6) ◽  
pp. 819-824 ◽  
Author(s):  
M. J. PALACIOS ◽  
F. VALERA ◽  
A. BARBOSA
Keyword(s):  
Growth Rate ◽  
Body Mass ◽  
Strong Relationship ◽  
Chinstrap Penguin ◽  
Gastrointestinal Parasites ◽  
Helminth Parasites ◽  
Offspring Quality ◽  
Host Fitness ◽  
Pygoscelis Antarctica ◽  
Negative Effect

SUMMARYParasites reduce host fitness and consequently impose strong selection pressures on their hosts. It has been hypothesized that parasites are scarcer and their overall effect on hosts is weaker at higher latitudes. Although Antarctic birds have relatively low numbers of parasites, their effect on host fitness has rarely been investigated. The effect of helminth parasitism on growth rate was experimentally studied in chinstrap penguin (Pygoscelis antarctica) nestlings. In a total of 22 two-nestling broods, 1 nestling was treated with anthelminthics (for cestodes and nematodes) while its sibling was left as a control. Increased growth rate was predicted in de-wormed nestlings compared to their siblings. As expected, 15 days after treatment, the experimental nestlings had increased body mass more than their siblings. These results show a non-negligible negative effect of helminth parasites on nestling body condition that would presumably affect future survival and thus fitness, and it has been suggested there is a strong relationship between body mass and mortality in chinstrap penguins.

Isolation and characterization of polymorphic microsatellite loci from the chinstrap penguin, Pygoscelis antarctica

2015 ◽  
Vol 7 (2) ◽  
pp. 561-563 ◽  
Author(s):  
Seunghyun Kang ◽  
Jin-Woo Jung ◽  
Do Hwan Ahn ◽  
Jong Eun Lee ◽  
Jeong-Hoon Kim ◽  
...  
Keyword(s):  
Microsatellite Loci ◽  
Chinstrap Penguin ◽  
Isolation And Characterization ◽  
Pygoscelis Antarctica ◽  
Polymorphic Microsatellite

Potential immunohaematological effects of persistent organic pollutants on chinstrap penguin

2015 ◽  
Vol 27 (4) ◽  
pp. 373-381 ◽  
Author(s):  
S. Jara-Carrasco ◽  
M. González ◽  
D. González-Acuña ◽  
G. Chiang ◽  
J. Celis ◽  
...  
Keyword(s):  
Red Blood Cells ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Blood Cells ◽  
Cellular Level ◽  
Chinstrap Penguin ◽  
Pygoscelis Antarctica ◽  
Cell Alterations ◽  
Cytological Alterations ◽  
The Impact

AbstractIt has been demonstrated that persistent organic pollutants (POPs) can affect the immune system of mammals and birds. In this study, the concentration of different POPs and leukocytes in blood samples from three chinstrap penguin (Pygoscelis antarctica) populations was analysed in order to assess the impact on haematological parameters. Using blood sample smears, basophils, eosinophils, heterophils, lymphocytes and monocytes were quantified. Mature and immature red blood cells were counted and cell alterations in both white and red blood cells were analysed. At the same time, whole blood was analysed for POPs. The results showed that contaminants, such as dichlorodiphenyltrichloroethane and its metabolites (ΣDDT), as well as polychlorinated biphenyls (ΣPCB), had significant correlations to eosinophils, lymphocytes and heterophils. This indicates possible immunohaematological alterations derived from exposure to such contaminants. Cytological alterations were also observed, such as cytotoxic granules, toxic heterophils, and atypical and granulated lymphocytes, which would demonstrate that these seabirds are being exposed to stress agents that could be producing some alterations at a leukocytary cellular level.

scholarly journals Causal and functional correlates of brood amalgamation in the chinstrap penguin Pygoscelis antarctica : parental decision and adult aggressiveness

Polar Biology ◽  
2003 ◽  
Vol 26 (8) ◽  
pp. 538-544 ◽  
Author(s):  
Vincenzo Penteriani ◽  
Javier Vi�uela ◽  
Josabel Belliure ◽  
Javier Bustamante ◽  
Miguel Ferrer
Keyword(s):  
Chinstrap Penguin ◽  
Parental Decision ◽  
Pygoscelis Antarctica ◽  
Brood Amalgamation

scholarly journals Dynamics of Numbers and Occurrence of Colonial Species of Birds in the Area of Ukrainian Antarctic Station Akademik Vernadsky

2019 ◽  
Vol 53 (6) ◽  
pp. 491-500
Author(s):  
V. M. Smagol ◽  
D. V. Pilipenko ◽  
A. O. Dzhulai
Keyword(s):  
Antarctic Peninsula ◽  
Water Area ◽  
Gentoo Penguin ◽  
Chinstrap Penguin ◽  
Pygoscelis Adeliae ◽  
The North ◽  
Pygoscelis Antarctica ◽  
Time Gap ◽  
The Antarctic ◽  
Green Island

Abstract The research covers water area, island archipelagos and coastal line of the Antarctic Peninsula from 65°31ʹ S, 64°25ʹ W in the South to 65°03ʹ S, 63°53ʹ W in the North. There was time gap of 7 years between the researches (2011 and 2018), which allows to define tendencies in development of individual colonies and to make conclusion about success of existence of a given species. The work itself was carried out during the first half of January, that is in the time when the stage of brooding ends and the period of hatching starts. As of 2011, 12 nesting points of gentoo penguin (Pygoscelis papua) with total number of 8,342 pairs were found in the region under investigation. Till 2018, quantity of the colony grew to 14, with total number of 14,105 pairs. For seven years, quantity of nesting points of aelie penguin (Pygoscelis adeliae) almost did not change (4 colonies). Instead, total number of the species decreased somewhat: from 3559 pairsin 2011 to 3295 onesin 2018. Number of chinstrap penguin (Pygoscelis antarctica) in united stable locality for nesting also decreased from 26 pairsin 2011 to19 onesin 2018. Booth Island (65°04ʹ S, 64°02ʹ W) for chinstrap penguins and Green Island (65°19ʹ S, 64°09ʹ W) for gentoo penguins are the southern most points of nesting range of the species. Also, 7 colonies of antarctic shag (Phalacrocorax bransfieldensis) were revealed in the region under investigation. For seven years from 2011 to 2018 total number of the species in the region under investigation grew from 190 pairs to 299, and in most cases the antarctics shag forms settlements jointly with penguins.

scholarly journals Limited effects of egg size on chick growth in the chinstrap Penguin Pygoscelis antarctica

Polar Biology ◽  
1999 ◽  
Vol 21 (2) ◽  
pp. 80-83 ◽  
Author(s):  
J. Belliure ◽  
L. M. Carrascal ◽  
E. Minguez ◽  
M. Ferrer
Keyword(s):  
Egg Size ◽  
Chinstrap Penguin ◽  
Chick Growth ◽  
Pygoscelis Antarctica

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

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Noah Strycker ◽  
Michael Wethington ◽  
Alex Borowicz ◽  
Steve Forrest ◽  
Chandi Witharana ◽  
...  
Keyword(s):  
Climate Change ◽  
Historical Data ◽  
Population Change ◽  
Chinstrap Penguin ◽  
Environmental Drivers ◽  
Population Assessment ◽  
Pygoscelis Antarctica ◽  
South Sandwich Islands ◽  
Global Population ◽  
Ongoing Monitoring

Abstract Using satellite imagery, drone imagery, and ground counts, we have assembled the first comprehensive global population assessment of Chinstrap penguins (Pygoscelis antarctica) at 3.42 (95th-percentile CI: [2.98, 4.00]) million breeding pairs across 375 extant colonies. Twenty-three previously known Chinstrap penguin colonies are found to be absent or extirpated. We identify five new colonies, and 21 additional colonies previously unreported and likely missed by previous surveys. Limited or imprecise historical data prohibit our assessment of population change at 35% of all Chinstrap penguin colonies. Of colonies for which a comparison can be made to historical counts in the 1980s, 45% have probably or certainly declined and 18% have probably or certainly increased. Several large colonies in the South Sandwich Islands, where conditions apparently remain favorable for Chinstrap penguins, cannot be assessed against a historical benchmark. Our population assessment provides a detailed baseline for quantifying future changes in Chinstrap penguin abundance, sheds new light on the environmental drivers of Chinstrap penguin population dynamics in Antarctica, and contributes to ongoing monitoring and conservation efforts at a time of climate change and concerns over declining krill abundance in the Southern Ocean.

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