TY  - JOUR
AU  - CORBEL Hélène, M. O. R. L. O. N. Francis
PY  - 2009//
TI  - State-dependent decisions during the fledging process of king penguin chicks
JO  - Animal behaviour
SP  - 829
EP  - 838
VL  - 78
PB  - Elsevier
KW  - Actividad
KW  - Activité
KW  - Activity
KW  - Alimentación
KW  - Alimentation
KW  - Animal jeune
KW  - Animal joven
KW  - Aptenodytes patagonicus
KW  - Aquatic environment
KW  - Aves
KW  - body condition
KW  - Colonia
KW  - Colonie
KW  - Colony
KW  - colony departure
KW  - Comportement alimentaire
KW  - Condición fisiológica
KW  - Condition physiologique
KW  - Conducta alimenticia
KW  - Conflict
KW  - Conflicto
KW  - Conflit
KW  - Decisión
KW  - Descendance
KW  - Descendencia
KW  - Emplumamiento
KW  - Emplumement
KW  - Feeding
KW  - Feeding behavior
KW  - Fledging
KW  - food provisioning
KW  - king penguin
KW  - locomotor activity
KW  - Marine environment
KW  - Medio acuático
KW  - Medio marino
KW  - Milieu aquatique
KW  - Milieu marin
KW  - Molt
KW  - moult
KW  - Muda
KW  - Mue
KW  - Parent
KW  - parent-offspring conflict
KW  - Pariente
KW  - Physiological condition
KW  - Progeny
KW  - Spheniscidae
KW  - Vertebrata
KW  - Young animal
KW  -
N2  - In birds, the chick's physical state at nest departure is critical for survival, especially for seabirds that shift from a terrestrial to a marine life. The timing of this life history transition should therefore be finely tuned by proximate factors reflecting the relative influence of parents and chicks. Using king penguins, Aptenodytes patagonicus, as a model, we investigated how food provisioning and chick developmental status and/or body condition interact with chick fledging behaviour to optimize the physical state at colony departure. During the month preceding colony departure, movements, developmental status and body condition were compared between naturally and experimentally fed chicks. Parents stopped feeding their moulting, obese chick on average 16 days before colony departure and no offspring anorexia was observed. All chicks left their feeding site at the time of moult end, indicating that complete feather development is a prerequisite for departing. The time between moult end and colony departure reduced both intra- and intergroup variation in body condition at departure, suggesting that this condition was optimized in terms of a trade-off between fat stores and buoyancy. After moult end, chicks increased their locomotor activity and energy expenditure, which contributes to the regulation of body condition. Our results indicate that the cessation of parental feeding does not trigger colony departure. Rather, the timing of departure depends on the chick's physical state, regardless of its recent feeding history. Thus, in king penguins, the parental decision to desert the chick seems to reflect a compromise between the offspring's body condition and its developmental status.
SN  - 0003-3472
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=2176), last updated on Sat, 06 Jul 2024 09:13:20 +0200
ID  - CORBELHelene2009
ER  -