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Reliability of flipper-banded penguins as indicators of climate change
It is shown that banding of free-ranging king penguins impairs both survival and reproduction, ultimately affecting population growth rate and calling into question the banding schemes still going on, and understanding of the effects of climate change on marine ecosystems based on flipper-band data should be reconsidered.
Coping with continuous human disturbance in the wild: insights from penguin heart rate response to various stressors
Using heart rate as a measure of the stress response, it is shown that, in a colony with areas exposed to the continuous presence of humans for over 50 years, penguins have adjusted to human disturbance and habituated to certain, but not all, types of stressors.
Effects of Individual Pre-Fledging Traits and Environmental Conditions on Return Patterns in Juvenile King Penguins
- C. Saraux, Vincent A. Viblanc, Nicolas Hanuise, Y. le Maho, C. Le Bohec
- Environmental SciencePLoS ONE
- 8 June 2011
A key finding is that return rates of non-banded king penguins returning to their natal colony were much higher than previously assumed for this species, importantly meaning that juvenile survival is very close to that of adults.
Visual lateralization is task and age dependent in cuttlefish, Sepia officinalis
Coping with social stress: heart rate responses to agonistic interactions in king penguins
- Vincent A. Viblanc, V. Valette, Marion Kauffmann, Nelly Malosse, R. Groscolas
- Biology, Psychology
- 1 November 2012
It is concluded that individual risk assessment and motivation modulate physiological responses to social stressors in group-living animals.
Starting with a handicap: phenotypic differences between early‐ and late‐born king penguin chicks and their survival correlates
Evidence is provided that late- and early-king penguin chicks showed marked phenotypic differences 10 days after hatching, and an integrative discussion on whether these differences may be adaptive or not, and to what extent they may be driven by active maternal effects, indirectly induced by environmental effects, or stem from individual differences in parental quality.
Telomere length reflects individual quality in free-living adult king penguins
Investigating the links between individuals’ relative telomere length, breeding performance and various physiological and life history parameters in a long-lived seabird species, the king penguin Aptenodytes patagonicus found that birds with longer telomeres arrived earlier for breeding at the colony, and had higher breeding performances.
Kin selection in Columbian ground squirrels (Urocitellus columbianus): littermate kin provide individual fitness benefits
- Vincent A. Viblanc, Coline M. Arnaud, F. S. Dobson, J. Murie
- BiologyProceedings of the Royal Society B: Biological…
- 7 April 2010
An evolutionary basis necessary for ongoing kin-selected cooperation in Columbian ground squirrels is demonstrated, though the mechanism of familiarity may determine which kin individuals benefit from cooperative behaviours.
Kin selection in Columbian ground squirrels: direct and indirect fitness benefits
- F. S. Dobson, Vincent A. Viblanc, Coline M. Arnaud, J. Murie
- Biology, PsychologyMolecular Ecology
- 1 February 2012
The presence of closely related and philopatric female kin appeared to result in considerable fitness benefits for female ground squirrels, perhaps through the behavioural mechanisms of lowered aggression and other forms of behavioural cooperation.
Male reproductive tactics to increase paternity in the polygynandrous Columbian ground squirrel (Urocitellus columbianus)
The results suggest that besides being the first male to consort, first-male sperm precedence is further enhanced through longer mating bouts and by suppressing the chances and/or efforts of later mating males.