Abstract

Methods. Study area ; Habitat characterization ; Captures and banding ; Site fidelity; Factors affecting fruit abundance ; Food availability per study site ; Ocean Hole space use and food resources ; Analyses and definitions ; Statistical tests ; Fruit abundance model selection ; Overwinter site persistence model selection

Results. Habitat variation among study sites ; Fruiting phenology ; Fruit abundance modeling ; Variation in food availability ; Fruit ; Foliage arthropods ; Ground arthropods ; Seasonal change in food resources within a winter ; Correlation of food-resource measures ; Diet composition ; Sex and age differences in captures ; Overwinter site persistence ; Annual return to a study site ; Site persistence in relation to food abundance and sex and age ; Modeling overwinter site persistence : models with arthropod and fruit biomass ; Modeling overwinter site persistence : models with fruit biomass ; Study-site shifts in relation to food abundance ; Late-winter warbler abundance at the fruit-rich OH site ; Late-winter warbler abundance and food-resource biomass ; Changes in physical condition ; Changes in corrected body mass ; Changes in fat scores ; Departure schedules ; Changes in physical condition with rainfall ; Effect of rainfall on corrected body mass in different periods ; Effect of rainfall on fat levels during different periods ; Annual return in relation to corrected body mass

Discussion. Factors affecting fruit abundance ; Variation in study-site food abundance ; Habitats with low arthropod biomass ; Overwinter site persistence ; Site fidelity and survival ; Annual return ; Role of dominance ; Late-winter warbler abundance and food resources ; Differences in corrected body mass and fat ; Rainfall and body condition ; Annual return and corrected body mass ; Conservation implications.