Modelling local survival probabilities of Slender-billed gulls at the Ebro Delta and Doñana breeding areas.

Resighting probabilities were modeled following the structure of models 13EB and 13DO for each colony (Tables 2 and 3). Notation, np: number of estimable parameters; Dev: relative deviance; AICc: Akaike information criterion corrected for small sample size; ΔAICc: the AICc difference between the current model and the one with the lowest AICc value; ‘col’ indicates a colony effect; ‘NAO’ is the winter NAO covariate; ‘t’ indicates a time effect; a() indicate the number of age classes considered; ‘/’ separates different effects considered independent for each age class; ‘+’ denotes an additive effect and ‘.’ interaction. The model with the lowest AICc is in bold.