Full life-cycle models from ring-recovery data: estimating fecundity from age ratios at capture

摘要: Tag-recovery data from organisms captured and marked post breeding are commonly used to estimate juvenile adult survival. If annual fecundity could also be estimated, tagging studies such as European North American bird-ringing schemes provide all parameters needed for building full life-cycle projection models. I modified existing tag-recovery models allow estimation of using age composition recapture probabilities obtained during routine banding operations northern pintails (Anas acuta) dark-eyed juncos (Junco hyemalis), conducted simulations assess estimator performance in relation sample size. For pintails, population growth rate band-recovery (λ = 0.929, SD 0.060) was similar but less precise than count-based estimates the Waterfowl Breeding Pair Habitat Survey 0.945, SE 0.001). Models with temporal variation vital rates indicated that driven primarily by fecundity. Juncos had lower survival greater fecundity, their estimated 1.01, 0.19) consistent surveys 0.986). Simulations reliable (CV 1000 same-season live encounters. Although precision depended on numbers recoveries, were most sensitive total number Synthesis applications: Large-scale ring-recovery programmes many species birds, approach requires better curation, including accurate assessment age, reporting totals emphasis obtaining