Skip to content

Research at St Andrews

Applying open population capture–recapture models to estimate the abundance of injection drug users in Victoria, Canada

Research output: Contribution to journalArticle

Author(s)

Paul Van Dam-Bates, Murray Fyfe, Laura L. E. Cowan

School/Research organisations

Abstract

Background: Injection drug users (IDUs) are considered a hidden, hard to reach population that is difficult to measure. Multi-list recapture methods are commonly used to estimate IDU population sizes but do not allow inference on population dynamics. In Victoria, Canada, closed population capture–recapture methods have been used to estimate the abundance of IDUs. In this study, we make use of a newer sample of a survey of IDUs to relax the closure assumption.

Methods: The I-Track survey of IDUs was carried out in Victoria on three occasions (2003, 2005 and 2009). Data from the three samples were linked using unique subject identifiers. A Jolly-Seber model was used to estimate the number of IDUs.

Results: The results were very similar to a two-sample closed population analysis. However, when using open-population models, it is possible to get estimates for each time period of abundance and survival. The estimate of the number of the IDUs in Greater Victoria was relatively stable with fewer than 3000 individuals over the six-year study.

Discussion: Improved estimates of population size and dynamics will assist in improving access to harm reduction services, which may reduce higher risk drug use practices.
Close

Details

Original languageEnglish
JournalJournal of Substance Use
Volume21
Issue number2
Early online date14 Jan 2015
DOIs
Publication statusPublished - 2016

    Research areas

  • Capture-recapture, Injection drug user, Open population

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Quantifying the extent of anthropogenic eutrophication of lakes at a national scale in New Zealand

    Abell, J. M., Özkundakci, D., Hamilton, D. P., Van Dam-Bates, P. & Mcdowell, R. W., 1 Aug 2019, In : Environmental Science and Technology. 53, 16, p. 9439-9452 14 p.

    Research output: Contribution to journalArticle

  2. Control of invasive predators improves breeding success of an endangered alpine passerine

    Weston, K. A., O'Donnell, C. F. J., Van Dam-Bates, P. & Monks, J. M., Oct 2018, In : Ibis. 160, 4, p. 892-899

    Research output: Contribution to journalArticle

  3. Using balanced acceptance sampling as a master sample for environmental surveys

    Van Dam-Bates, P., Gansell, O. & Robertson, B., Jul 2018, In : Methods in Ecology and Evolution. 9, 7, p. 1718-1726

    Research output: Contribution to journalArticle

  4. Assessing movement of the California sea cucumber Parastichopus californicus in response to organically enriched areas typical of aquaculture sites

    Van Dam-Bates, P., Curtis, D. L., Cowen, L. L. E., Cross, S. F. & Pearce, C. M., 2016, In : Aquaculture Environment Interactions. 8, p. 67-76

    Research output: Contribution to journalArticle

ID: 259473166

Top