Modelling resighting and local survival probabilities of Slender-billed gulls at the Ebro Delta.

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; ‘t’ indicates a time effect; a() indicate the number of age classes considered; ‘FISH’ is the fish landings covariate; ‘/’ separates different effects considered independent for each age class; ‘+’ denotes an additive effect and ‘.’ interaction. Results of the ANODEV test are presented, n.s. indicate not significant effect. r2 indicates the proportion of temporal variation of survival explained by the covariate. The model with the lowest AICc is in bold.