Angelier Fr&eacute;d&eacute;ric, Giraudeau Mathieu, Bost Charles-Andr&eacute;, Le Bouard Fabrice, Chastel Olivier, . (2009). Are stress hormone levels a good proxy of foraging success? An experiment with king penguins, Aptenodytes patagonicus.. J. Exp. Biol., 212(17), 2824–9.