[Basta-users] BaSTA Priors for Detection Probabilities

[Fernando Colchero]

Hi George,

   For the recapture probabilities we use beta priors with parameters s1 = 1 and s2 = 1. Unfortunately we have not yet incorporated the option to change the priors, but you can determine different recapture probabilities for different years. I’m not sure if this may help. 

Best,

Fernando
_________________________________

Fernando Colchero
Associate Professor
Department of Mathematics and Computer Science
Biodemography Unit

Tlf.              +45 65 50 23 24
Email          colchero at imada.sdu.dk <mailto:colchero at imada.sdu.dk>
Web            www.sdu.dk/staff/colchero <http://www.sdu.dk/staff/colchero>
Pers. web   www.colchero.com <http://www.sdu.dk/staff/colchero>
Adr.             Campusvej 55, 5230, Odense, Dk

University of Southern Denmark
_________________________________




> On 17 Aug 2018, at 19:25, George Brooks <boa10gb at vt.edu> wrote:
> 
> Hi all, 
> 
> I am a PhD student at Virginia Tech studying amphibian and reptile conservation. I am new to this mailing list, so apologies if this question has already been addressed.
> 
> I'm having difficulty estimating detection probabilities from my data; specifically, they are consistently overestimated, and hence survival is consistently underestimated.
> 
> Looking through the documentation, I could not find information for the following:
> 
> 1) What is the default prior for detection probabilities?
> 2) Can an informative prior be specified in the basta() function? 
> 
> Any help or advice on this topic would be greatly appreciated.
> 
> Thanks,
> George Brooks
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