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Agonistic behavior in wild male Magellanic penguins: When and how do they interact?
(Springer Tokyo, 2006-04)
Game-theory models predict that the frequency and type of agonistic interactions should vary with the value of the resource being contested. We describe bill duels and overt fighting in male Magellanic penguins (Spheniscus ...
Fine-scale body and head movements allow to determine prey capture events in the Magellanic Penguin (Spheniscus magellanicus)
(Springer, 2021-06)
The identification of when, how and where animals feed is essential to estimate the amount of energy they obtain and to study the processes associated with prey search and consumption. We combined the use of animal-borne ...
Compensatory effect of egg size dimorphism on hatching asynchrony in Magellanic penguin
(Wiley Blackwell Publishing, Inc, 2021-07)
Egg laying is one of the most important phases in a female bird’s breeding cycle. Its cost is high because eggs contain all the resources needed for the development of an embryo. Variation in size and quality of eggs can ...
Magellanic Penguins Spheniscus magellanicus commuting through San Julian Bay; do current trends induce tidal tactics?
(Wiley Blackwell Publishing, Inc, 2001-11)
The behaviour of Magellanic Penguins Spheniscus magellanicus commuting between their foraging areas and breeding areas in San Julian Bay, Argentina, was studied to examine whether tidal rip currents affected travelling ...
Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
(Wiley, 2014-04-01)
Understanding how top predators respond to natural and anthropogenically induced changes in their environment is a major conservation challenge especially in marine environments. We used a multidisciplinary approach to ...
Winning and losing: Causes for variability in outcome of fights in male Magellanic penguins (Spheniscus magellanicus)
(Oxford Univ Press Inc, 2002-01)
Game theory models predict that fighting ability should be more important in contest outcome when the payoffs of winning are high for both contestants, and ownership should be more important when payoffs are low. Male ...
Demographic history of the Magellanic Penguin (Spheniscus magellanicus) on the Pacific and Atlantic coasts of South America
(2018)
Spatial subdivision, local extinction and recolonization influence the genetic variation of natural populations. Different levels of population structure can be identified in nature, from panmictic populations, in which ...
Foraging effort in Magellanic penguins: balancing the energy books for survival?
(Springer Verlag Berlín, 2014-11-27)
The determination of activity-specific energy expenditure of wild animals is key in ecology and conservation sciences. Energy management is crucial for seabirds during the breeding season when they need to maintain a ...
Population regulation in Magellanic penguins: what determines changes in colony size?
(Public Library of Science, 2015-03-18)
Seabirds are often studied at individual colonies, but the confounding effects of emigration and mortality processes in open populations may lead to inappropriate conclusions on the mechanisms underlying population changes. ...
Conspecific food competition explains variability in colony size: a test in magellanic penguins
(Ecological Society of America, 2002-12)
Food availability has been proposed as one of the main factors regulating population sizes in birds. Seabirds have provided evidence for the hypothesis that food depletion due to intraspecific competition explains variability ...