True vs Apparent Survival in a Multi-state Robust Design

questions concerning analysis/theory using program MARK

True vs Apparent Survival in a Multi-state Robust Design

Postby brp » Wed Oct 21, 2009 3:46 pm

We have been trapping foxes for the past 3 years. We have a robust design with 3 primary sessions (years: 2007, 2008, 2009) and 4 secondary occasions (days) within each year. I am running a multi-state robust design where age (pup, non-pup) are the states.

Are the S's given in the output apparent or true survival?

Since I am using ages as states, the gamma_prime and gamma_double_prime parameters are not present in the PIMs. Are the Observable and Unobservable states still being used? If not, how is temporary emigration being estimated?

Thank you!
brp
 
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Re: True vs Apparent Survival in a Multi-state Robust Design

Postby cooch » Wed Oct 21, 2009 4:05 pm

brp wrote:Are the S's given in the output apparent or true survival?


Unless you have dead recoveries (which involves a different data type), or other very specific sampling constraints, the estimates are apparent survival.
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