Table 1. Component parameters for the eastern Canada Piping Plover projection matrix model, and estimates for each breeding population segment (South NS: southern Nova Scotia; Gulf: Gulf of St. Lawrence); see text for details of parameter estimation. Parameter Notation Definition South NS Gulf Adult survival ΦA SY+ bird survival 1 yr after census 0.7324 0.7331 Juvenile survival (from hatch) ΦJ HY bird survival 1 yr after census 0.3279 0.2395 Fledging success f Probability hatchling survives to fledge 0.6171 0.7014 Juvenile survival (post-fledge) ΦJw= ΦJ/f HY bird survival from fledge to 1 yr old 0.5314 0.3415 Second-year recruitment yS Probability that SY bird builds nest 0.8095 0.8504 Third-year recruitment yT Probability that TY bird builds nest 0.9910 0.9823 Number of eggs laid E Mean number eggs laid per nest 3.8065 3.9389 Hatching success h Probability that an egg hatches 0.4603 0.5120