Now showing items 1-10 of 15
(University of St Andrews, 2017-12-07) - Thesis
Bayesian hierarchical modelling of continuous non-negative longitudinal data with a spike at zero : an application to a study of birds visiting gardens in winter
(2016-03) - Journal article
The development of methods for dealing with continuous data with a spike at zero has lagged behind those for overdispersed or zero-inflated count data. We consider longitudinal ecological data corresponding to an annual ...
Injecting drug users in Scotland, 2006 : listing, number, demography, and opiate-related death-rates
(2013-06) - Journal article
Using Bayesian capture–recapture analysis, we estimated the number of current injecting drug users (IDUs) in Scotland in 2006 from the cross-counts of 5670 IDUs listed on four data-sources: social enquiry reports (901 IDUs ...
Bayesian methods for hierarchical distance sampling models
(2014-06-01) - Journal article
The few distance sampling studies that use Bayesian methods typically consider only line transect sampling with a half-normal detection function. We present a Bayesian approach to analyse distance sampling data applicable ...
A generalised likelihood framework for partially observed capture-recapture-recovery models
(2014) - Journal article
We provide a closed form likelihood expression for multi-state mark-recapture-recovery data when the state of an individual may be only partially observed. The corresponding su cient statistics are presented in addition ...
Analysing mark-recapture-recovery data in the presence of missing covariate data via multiple imputation
(2015-03) - Journal article
We consider mark–recapture–recovery data with additional individual time-varying continuous covariate data. For such data it is common to specify the model parameters, and in particular the survival probabilities, as a ...
Bayesian point process modelling of ecological communities
(University of St Andrews, 2013-06-28) - Thesis
The modelling of biological communities is important to further the understanding of species coexistence and the mechanisms involved in maintaining biodiversity. This involves considering not only interactions between ...
Identifying multispecies synchrony in response to environmental covariates
(2016-12) - Journal article
The importance of multi-species models for understanding complex ecological processes and interactions is beginning to be realised. Recent developments, such as those by Lahoz-Monfort et al. (2011), have enabled synchrony ...
Estimating prevalence of injecting drug users and associated heroin-related death rates in England by using regional data and incorporating prior information
(2014-01) - Journal article
Injecting drug users (IDUs) have a direct social and economic effect yet can typically be regarded as a hidden population within a community. We estimate the size of the IDU population across the nine different Government ...
Estimation of population size when capture probability depends on individual states
(2019-03) - Journal article
We develop a multi-state model to estimate the size of a closed population from capture–recapture studies. We consider the case where capture–recapture data are not of a simple binary form, but where the state of an ...