[Basta-users] BaSTA Priors for Detection Probabilities

[George Brooks]

Hi Fernando, thanks for the reply!
Yes I tried playing around with variability in detection probabilities, but
I still seem to always get overestimated detection probabilities. Not to
worry.
Thanks,
George

On Mon, Aug 20, 2018 at 2:16 AM, Fernando Colchero <colchero at imada.sdu.dk>
wrote:

> 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
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>
> *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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