ArticleAny:  2019 

Autor(s):  Ana. SanzAguilar, R. Pradel, G. Tavecchia 

Títol:  Age–dependent capture–recapture models and unequal time intervals 

Revista:  ANIMAL BIODIVERSITY AND CONSERVATION 

ISSN:  1578665X 

Volum:  42 

Número:  1 

Pàgines:  9198 

D.O.I.:  NA 

Web:  http://abc.museucienciesjournals.cat/volume4212019abc/haplotypiccharacterizationoftheoliveridleyturtlelepidochelysolivaceainnorthwestmexicothenorthernmostlimitofitsdistribution/?lang=en 

Resum:  Estimates of survival probabilities in natural populations can be
obtained through capture–mark–recapture (CMR) models. However, when
capture sessions are unevenly spaced, age–dependent models can lead to
erroneous estimates of survival when individuals change age class during
the time interval between two capture occasions. We propose a solution
to correct for the mismatch between time intervals and age class
duration in two age class models. The solution can be implemented in
different ways. The first consists of adding dummy occasions to the
encounter histories and fixing the corresponding recapture probabilities
at zero. The second makes use of the log–link function available in
some CMR software (e.g. program MARK). We used simulated and real data
to show that the proposed solution delivers unbiased estimates of
age–dependent survival probabilities. 


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