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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	The Mediterranean Storm Petrel Hydrobates pelagicus melitensis at Cabrera archipelago (Balearic Islands, Spain): Breeding moult, biometry and evaluation of the population size by mark and recapture techniques
Auteurs :	J. F. Amengual, Auteur ; G. Gargallo, Auteur ; M. Suarez, Auteur ; J. Bonnin, Auteur ; J. M. Gonzalez, Auteur ; M. Rebassa, Auteur ; M. McMinn, Auteur
Type de document :	Article
Dans :	Ringing & Migration (19(3) May, 1999)
Article en page(s) :	181-190
Résumé :	The population size of the Mediterranean Storm Petrel Hydrobates pelagicus melitensis breeding on Cabrera archipelago was evaluated by using capture-recapture techniques (du Feu estimation) with the aid of tape-lures at the breeding colonies. Both sub-adult and adult birds were attracted by the tape lures at a similar rate, and both age groups show a high degree of philopatry to their natal site. The recapture of birds ringed in the previous years, that were originally captured as adults or chicks, has provided valuable information for the determination of the age composition of the birds mist-netted during the breeding season. Sub-adult birds tend to visit the colonies during the pre-egg and egg-rearing stage, while those present at the breeding sites from July on are predominantly adult breeding birds. New information on biometry of the subspecies is given, together with evidence of a breeding moult that includes the flight feathers, and affects sub-adult non-breeders and adult breeders. The moult pattern shows clear cut differences in its development and timing for both age groups.

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