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

The effect of hatching date on parental care, chick growth, and chick mortality in the chinstrap penguin Pygoscelis antarctica

1996 ◽  
Vol 240 (1) ◽  
pp. 51-58 ◽  
Author(s):  
J. Vinuela ◽  
J. Moreno ◽  
L. M. Carrascal ◽  
J. J. Sanz ◽  
J. A. Amat ◽  
...  
Keyword(s):  
Parental Care ◽  
Chinstrap Penguin ◽  
Hatching Date ◽  
Chick Growth ◽  
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

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

Shiny cowbird Molothrus bonariensis egg size and chick growth vary between two hosts that differ markedly in body size

2012 ◽  
Vol 43 (3) ◽  
pp. 227-233 ◽  
Author(s):  
Diego T. Tuero ◽  
Vanina D. Fiorini ◽  
Bettina Mahler ◽  
Juan C. Reboreda
Keyword(s):  
Body Size ◽  
Egg Size ◽  
Chick Growth ◽  
Molothrus Bonariensis
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