Skip to main content
Kent Academic Repository

Capture-recapture models with heterogeneous temporary emigration

Matechou, Eleni, Argiento, Raffaele (2022) Capture-recapture models with heterogeneous temporary emigration. Journal of the American Statistical Association, 118 (541). pp. 56-69. ISSN 0162-1459. E-ISSN 1537-274X. (doi:10.1080/01621459.2022.2123332) (KAR id:96926)

Abstract

We propose a novel approach for modelling capture-recapture (CR) data on open populations that exhibit temporary emigration, whilst also accounting for individual heterogeneity to allow for differences in visit patterns and capture probabilities between individuals. Our modelling approach combines changepoint processes – fitted using an adaptive approach – for inferring individual visits, with Bayesian mixture modelling – fitted using a nonparametric approach – for identifying clusters of individuals with similar visit patterns or capture probabilities. The proposed method is extremely flexible as it can be applied to any CR data set and is not reliant upon specialised sampling schemes, such as Pollock’s robust design. We fit the new model to motivating data on salmon anglers collected annually at the Gaula river in Norway. Our results when analysing data from the 2017, 2018 and 2019 seasons reveal two clusters of anglers – consistent across years – with substantially different visit patterns. Most anglers are allocated to the “occasional visitors” cluster, making infrequent and shorter visits with mean total length of stay at the river of around seven days, whereas there also exists a small cluster of “super visitors”, with regular

and longer visits, with mean total length of stay of around 30 days in a season. Our estimate of the probability of catching salmon whilst at the river is more than three times higher than that obtained when using a model that does not account for temporary emigration, giving us a better understanding of the impact of fishing at the river. Finally, we discuss the effect of the COVID-19 pandemic on the angling population by modelling data from the 2020 season. Supplementary materials for this article are available online.

Item Type: Article
DOI/Identification number: 10.1080/01621459.2022.2123332
Uncontrolled keywords: Angling, Clustering, Chinese Restaurant process, Population size, Stopover model
Subjects: Q Science > QA Mathematics (inc Computing science) > QA276 Mathematical statistics
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Mathematics, Statistics and Actuarial Science
Funders: University of Kent (https://ror.org/00xkeyj56)
Depositing User: Eleni Matechou
Date Deposited: 14 Sep 2022 14:43 UTC
Last Modified: 04 Jul 2023 12:50 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/96926 (The current URI for this page, for reference purposes)

University of Kent Author Information

  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.