Effective sample size calc for Barker Models

[mldavis13]

I am working with Barker models and cannot figure out exactly how Mark is calculating my effective sample size. I know that it doesn't reflect the number of capture histories. I've tried "searching" the MARK book on this and re-reading relevant sections, but am still at a loss. Can someone clarify this for me?

Thank you very much for your help!

[cooch]

I am working with Barker models and cannot figure out exactly how Mark is calculating my effective sample size. I know that it doesn't reflect the number of capture histories. I've tried "searching" the MARK book on this and re-reading relevant sections, but am still at a loss. Can someone clarify this for me?

Thank you very much for your help!

You don't say which flavour of Barker models. There are a few (although Kendall is still out front with number of permutations of RD).

if you mean standard Barker with mixture of live encounters and dead recoveries (and, in fact, all of the RD models), then its the number of releases and re-releases. This is a compromise between what the closed models use (t*M(t+1)) and the CJS (number releases and re-releases except the last occasion).