Hello,
I am trying to replicate and expand a multi-state survival analysis where the researchers used the phi parameterization of the multi-state model in SURVIVE to estimate phi (where phi = S*psi). They used a radio telemetry data set and a multi-state model where the states where 1=located alive, 2=located but status unknown (e.g., in a burrow), and 3 = dead. They report survival as the probability of being alive at time i and staying alive until time i + 1 (phi alive-alive). Apparently there were a sufficient number of telemetry locations in the unknown state so that a known-fate model was not appropriate. I have some new data to add to the original analysis but as a MARK/RMark user who has never used SURVIVE, I first wanted to look into doing this analysis in MARK. I found this post from 2009 (viewtopic.php?f=1&t=1265&p=3549&hilit=+phi+multi+state+#p3549) where Evan explained that MARK does not provide an estimate of phi (although he mentioned it could be possible to calculate phi by hand). I wanted to follow up on this post to see if there have been any new developments or if anyone has any additional suggestions on how one might conduct this analysis in MARK before trying to learn SURVIVE.
Thanks,
Javan
P.S. Here is the citation for the previous study if anyone is interested:
Breininger, D. R., M. J. Mazerolle, M. R. Bolt, M. L. Legare, J. H. Drese, and J. E. Hines. 2012. Habitat fragmentation effects on annual survival of the federally protected eastern indigo snake. Animal Conservation 15:361-368.