Publication details.

Paper

Year:2019
Author(s):Ana. Sanz-Aguilar, R. Pradel, G. Tavecchia
Title:Age–dependent capture–recapture models and unequal time intervals
Journal:ANIMAL BIODIVERSITY AND CONSERVATION
ISSN:1578-665X
Volume:42
Issue No.:1
Pages:91-98
D.O.I.:NA
Web:http://abc.museucienciesjournals.cat/volume-42-1-2019-abc/haplotypic-characterization-of-the-olive-ridley-turtle-lepidochelys-olivacea-in-northwest-mexico-the-northernmost-limit-of-its-distribution/?lang=en
Abstract: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.

Related staff

  • Giacomo Tavecchia
  • Ana Sanz Aguilar
  • Related departments

  • Animal and Microbial Biodiversity
  • Related projects

  • RESET CTA 161
  • Related research groups

  • Ecology and Evolution