Recruitment data for kittiwakes breeding in Middleton Island (Alaska)

Birds were born and raised in nests with supplemented food (“Fed”) or unsupplemented control nests (“Unfed”), and later recruited into either Fed or Unfed nests. ----------- Data have been collected by Scott Hatch.

Data have been prepared and presented in the current form by Simone Vincenzi. ------------ Dataset: --------- The dataset reports the variables and descriptors explained below relative to both the nestling phase and recruitment phase ---------- For each individual (each row), we recorded: Feeding: feeding treatment (Fed/Unfed) at the nestling stage Rank: hatching order (A-chick, B-chick, C-chick, Singleton) Band: ID of bird Mean_growth: daily growth during the linear phase in g/day (between day 5 and day 20, from approximately 75 to 300 g) Peak_weight: maximum weight reached by the chick (g) Year_of_birth Sex Treatment_recruit: feeding treatment (Fed/Unfed) at breeding First_breeding: year at recruitment Recruit_age: age at recruitment Clutch_size: number of eggs laid by the female Chicks_fledged: number of chicks leaving the nest Repro_succ01_rel: Chicks fledged per nest (productivity) at first breeding relative to the mean productivity in that year for Fed or Unfed nests