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Abstract
Commercial fisheries of lanternfishes (Myctophidae: Osteichthyes) began a few years ago in the Atlantic sector of the Southern Ocean and exploitable stocks of myctophids probably also occur in the Indian and Pacific sectors. The Scientific Committe for the Conservation of Antarctic Marine Living Ressources (CCAMLR 1991) recommended to collect informations on potential competition between these fisheries and populations of predators. The king penguin (Aptenodytes patagonicus) is the most specialized subantarctic seabird preying upon mesopelagic rnyctophids (Adams and Klages 1987; Hindell 1988; Klages et al. 1990; Ridoux 1992), and more than 50% of the bird's world population is located in Crozet Archipelago (Jouventin et al. 1984). Since only limited king penguin diet data from Crozet Islands are available (Cherel and Ridoux 1992; Ridoux 1992), we investigated the food of king penguin chicks during their extended fledging period (about 11 months; Stonehouse 1960), to test for seasonal variation and the significance of their main prey in relation to the bird's breeding cycle.
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