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Author  |
Viblanc Vincent A, Saraux Claire, Malosse Nelly, Groscolas René, |
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Title |
Energetic adjustments in freely breeding-fasting king penguins: does colony density matter?
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Journal Article |
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2014 |
Publication |
Functional Ecology |
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28 |
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3 |
Pages |
621-631 |
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Keywords |
body temperature, energy expenditure, fasting, heart rate, physical activity, seabird, social density, stress, |
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Abstract |
1. For seabirds that forage at sea but breed fasting on land, successful reproduction depends
on the effective management of energy stores. Additionally, breeding often means
aggregating in dense colonies where social stress may affect energy budgets.
2. King penguin (Aptenodytes patagonicus) males fast for remarkably long periods (up to 1.5
months) while courting and incubating ashore. Although their fasting capacities have been
well investigated in captivity, we still known very little on the energetics of freely
breeding birds.
3. We monitored the heart rate (HR; a proxy to energy expenditure), body temperature, and
physical activity of male king penguins during their courtship and first incubation shift in
a colony of some 24,000 freely breeding pairs. Males were either breeding under low but
increasing colony density (early breeders), or at high and stable density (late breeders).
4. In early breeders, daily mean and resting HR decreased during courtship but increased
again 3 days before egg-laying and during incubation. In late breeders, HR remained
stable throughout this same breeding period. Interestingly, the daily increase in resting HR
we observed in early breeders was strongly associated with a marked increase in colony
density over time. This finding remained significant even after controlling for climate
effects.
5. In both early and late breeders, courtship and incubation were associated with a
progressive decrease in physical activity, whereas core body temperature remained
unchanged.
6. We discuss the roles of decreased physical activity and thermoregulatory strategies in
sustaining the long courtship-incubation fast of male king penguins. We also draw
attention to a potential role for conspecific density in affecting the energetics of breeding
fasting seabirds, i.e. a potential energy cost to coloniality. |
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1365-2435 |
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5666 |
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Author |
Viblanc Vincent A, Mathien Adeline, Saraux Claire, Viera Vanessa M, Groscolas René, |
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Title |
It Costs to Be Clean and Fit: Energetics of Comfort Behavior in Breeding-Fasting Penguins
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Journal Article |
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Year |
2011 |
Publication |
PLoS ONE |
Abbreviated Journal |
1932-6203 |
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6 |
Issue |
7 |
Pages |
e21110- |
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119 |
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3796 |
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Author |
VIBLANC Vincent |
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Title |
Ajustements aux contraintes énergétiques et sociales chez un reproducteur colonial: adaptations énergétiques et comportementales chez le manchot royal (A. patagonicus)
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2011 |
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3600 |
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Author |
Viblanc VA, Valette V, Saraux C, Kauffmann M, Malosse N, Groscolas R. |
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Title |
Aggressiveness and social stress in a colonial seabird: is there an energy cost to group-living? 8th European Ornithologists' Union Conference. Riga, Latvia. August 2011. |
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2011 |
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1452 |
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Author |
Viblanc Va, Stier A, Bize P, Schull Q, Criscuolo F, Groscolas R, Robin Jp |
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Title |
The ecophysiology of king penguins : responses to a fluctuating environment |
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Book Chapter |
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Year |
2021 |
Publication |
17émes journées scientifiques du cnfra, 26-27 mai 2021, paris, france |
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Penguins are sea...birds. These highly evolved marine predators thrive in the oceanic habitat. Yet, they are conflicted – confronted to the duality of a life spent partly at sea, partly on-land. This life style has them subject to a number of very different ecological pressures. The ECONERGY polar project (IPEV #119) seeks to understand how king penguin cope with the constraints they face while living on-land, and the underlying physiological adaptations that allow them to do so. This includes studies dealing with fasting, parasites, predators, aggressive neighbors, climate and human disturbance. I will present some of the advances our project has made over the past decades, and where we will proceed in the years to come with a new project. We aim to understand bird stress from an integrative perspective, building a long-term observatory of penguin physiological responses to a changing world, and determining how breeding performances on land and foraging performances at sea are related. |
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Bachelor's thesis |
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8106 |
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Viblanc Va, Stier A, Bize P, Schull Q, Criscuolo F, Groscolas R, Robin Jp |
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Title |
The ecophysiology of king penguins: responses to a fluctuating environment |
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Peer-reviewed symposium |
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2021 |
Publication |
1ier webinaire franco-argentin sur l’antarctique: opportunités et défis scientifiques soixante ans après l'entrée en vigueur du traité sur l'antarctique (coorganisé par l’institut polaire français ipev, l’institut antarctique argentin et l’ambassade de fr |
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8484 |
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Viblanc VA, Smith A, Gineste B, Kauffmann M, Zimmer C, Robin JP, Groscolas R |
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Title |
Testing the “Brood-value Hypothesis” in long-lived seabirds: modulation of the heart rate, hormonal and metabolic response to various stressors.1.
8th Ecology and Behaviour Meeting. CEBC, Chizé, France. April 2012. |
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Conference - National - Communication |
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2012 |
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4187 |
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Author |
Viblanc VA, Mathien A, Groscolas R. |
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Title |
On the energetics of specific behaviors: insights from heart rate and the example of comfort behavior in breeding king penguins.7. Phillip Island Nature Park, Victoria, Australia. Dec 2009. Invited Talk (Guest of Dr. A. Chiaradia) |
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Conference - International - Communication |
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2009 |
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359 |
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Viblanc VA, Marty M, Périé C, Saraux C, Kauffmann M, Groscolas R, Célérier A |
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Title |
Threatened life: stress responses to real-time predator encounters in king penguin chicks. 9th International Penguin Congress Cape Town (South Africa) |
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2016 |
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6883 |
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Viblanc VA |
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Freaked out penguins : is there a cost to breeding in a crowd. University of Toronto, Dept. Of Biological Science. Invited seminar. |
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2013 |
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4879 |
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