Adjusting Phi with an independent estimate of philopatry

[Jochen]

Dear All,

I am looking for a way to adjust the Phi estimate using an independent estimate of philopatry.

I study a bird known to be very mobile and I expect Phi to be strongly influenced by emigration. P may as well be influenced by (temporal) emigration.
There are nearly no dead recoveries and no other study sites, so no alternative to recaptures only-models. P is well above 0.1 and Phi around 0.21.
There is an estimate of philopatry from a stable isotope study.

Now the question: can this estimate be used to adjust Phi in order to get an estimate for true survival? Dividing Phi by philopatry looks promising but as birds in the stable isotope study were sampled only once (on first capture), temporal emigration may be included in this estimate of philopatry.

In other words: is there a way to apply the estimate of philopatry to CJS-results when Phi as well as P may incorporate an unknown part of the true level of philopatry, or is it convincing enough to simply divide Phi by philopatry?

Thanks for any useful suggestion!
Jochen

[Javier Klaich]

Hello Jochen

May be, you can estimate the true survival rate using a Psi estimate from an unobservanle (U) and observable (O) states model (Schaub et al, 2004), wich also (of course) provide estimates of Phi and P, I have a copy of this paper if you want it. In this way you can estimate philopatry from your data taking account the movements of the birds in and out of your study area.
Good luck!

Javier