[Basta-users] Perfect detection problem

[Fernando Colchero]

Dear Barbara,

   Sorry for the late reply. What you mention might be the issue, particularly the 100% recapture, although we found the same problem in an older version of BaSTA, particularly the version that is currently in CRAN. I can send you the updated version, but alternatively, I can send you another package I’ve developed based on BaSTA but that works on census data, which might be more appropriate in your case.

Best,

  Fernando

-----------------------------------------------------
Fernando Colchero
Associate Professor
Department of Mathematics and Computer Sciences (IMADA)
and Interdisciplinary Center on Population Dynamics (CPop)

Tlf.              +45 65 50 46 35
Email           colchero at imada.sdu.dk<mailto:colchero at imada.sdu.dk>
Web            www.sdu.dk/staff/colchero
Pers. web     www.colchero.com
Adr.             Campusvej 55, 5230, Odense, Dk

University of Southern Denmark
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From: Basta-users <basta-users-bounces at lists.r-forge.r-project.org> on behalf of Tschirren, Barbara <B.Tschirren at exeter.ac.uk>
Date: Monday, 13 December 2021 at 09.40
To: basta-users at lists.r-forge.r-project.org <basta-users at lists.r-forge.r-project.org>
Subject: [Basta-users] Perfect detection problem
You don't often get email from b.tschirren at exeter.ac.uk. Learn why this is important<http://aka.ms/LearnAboutSenderIdentification>
Dear BaSTA Team,
I tried to estimate age-specific survival in my system but continued to get the error message
Calculating DIC...Error in rep(0, nbd) : invalid 'times' argument
My system has a 100% detection probability and 100% of the birth dates are known.  I started to suspect that this might cause the problem. Indeed, when randomly adding some observation uncertainty (i.e. replacing a single known birth date with 0) the simulations ran smoothly. Is there a way to get around this problem, e.g. by specifying very strong priors?
Many thanks for your help,
Barbara

--------------------------------------
Dr Barbara Tschirren
Senior Lecturer in Evolutionary Ecology
University of Exeter
Centre for Ecology and Conservation
Penryn Campus, Stella Turk building
Penryn, Cornwall, TR10 9FE, United Kingdom

Email: b.tschirren at exeter.ac.uk<mailto:b.tschirren at exeter.ac.uk>
Phone: +44 (0)1326 214388
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