Théo Michelot
@theomichelot.bsky.social
1K followers 340 following 2 posts
Assistant professor of statistics at Dalhousie University. Stochastic processes and applications in ecology. https://theomichelot.github.io/
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Reposted by Théo Michelot
eebdennis.bsky.social
🚨 New preprint!

Have you ever wondered if we can detect disease in wildlife just by looking at their movement?

We show how hidden Markov models can link animal trajectories to infection states — tested on reintroduced scimitar-horned oryx and simulated data.
👉 arxiv.org/abs/2509.21132
Detecting disease progression from animal movement using hidden Markov models
Understanding disease dynamics is crucial for managing wildlife populations and assessing spillover risk to domestic animals and humans, but infection data on free-ranging animals are difficult to obt...
arxiv.org
theomichelot.bsky.social
The hmmTMB paper is finally out in the Journal of Statistical Software!

An R package for hidden Markov models with random effects, flexible spline-based covariate effects, and fast inference using TMB or Stan.

Check out the GIthub repository for more examples.

doi.org/10.18637/jss...
hmmTMB: Hidden Markov Models with Flexible Covariate Effects in R by Théo Michelot
<p>Hidden Markov models (HMMs) are widely applied in studies where a discrete-valued process of interest is observed indirectly. They have for example been used to model behavior from human and animal...
doi.org
Reposted by Théo Michelot
marieaugermethe.bsky.social
Like to develop spatio-temporal models? Interested in Arctic marine mammals 🦭🐳 and their susceptibility to oil spills? You may be the postdoctoral fellow Dr. Mariane Marcoux and I are looking for! See the details in the job ad: tinyurl.com/spatiostatamm
Reposted by Théo Michelot
dalfaculty.bsky.social
History-changing day for labour relations at @dalhousieu.bsky.social. Lockout of faculty could begin as early as Wed morning. Rest assured, DFA members are ready for what is about to happen. #keepdalstrong @cupe3912.bsky.social @nsgeu.bsky.social @ansut.bsky.social @caut.bsky.social
Reposted by Théo Michelot
vianeylb.bsky.social
The world is on 🔥 -- and here's my first publication in an astronomy journal: iopscience.iop.org/article/10.3...

We combine Gaussian processes + hidden Markov models to efficiently detect stellar flares in one modelling step. 🧪
Reposted by Théo Michelot
olemole.bsky.social
Sina Mews, Roland Langrock, and I have updated 🆕 our review paper!
It offers a comprehensive overview on choosing the right time ⏰ and space 📏 formulation for latent Markov models, providing a unifying perspective on discrete- and continuous-time HMMs, SSMs and MMPPs.

👉 arxiv.org/abs/2406.19157
How to build your latent Markov model -- the role of time and space
Statistical models that involve latent Markovian state processes have become immensely popular tools for analysing time series and other sequential data. However, the plethora of model formulations, t...
arxiv.org
Reposted by Théo Michelot
talom.bsky.social
Animal movement workshop alert! A line of speakers difficult to beat with John Fieberg, Marie Auger-Méthé, Brett McClintock & Inês Silva and the location is definitely a place that makes you "move" for it: lovely Madeira. 19-23 May 2025. Just after the ECS in Azores. It's PT islands 2025. See you?
Animal movement workshop
marcfer3.wixsite.com
theomichelot.bsky.social
Updated vignette on Bayesian inference for hidden Markov models with hmmTMB: specifying priors, extracting posterior samples, visualising posterior uncertainty for estimated distributions and covariate-parameter relationships, etc.

Based on Stan, so it's pretty fast too!

github.com/TheoMichelot...
Posterior sampled for relationship between transition probabilities and covariates in a 2-state hidden Markov model. The posterior samples allow for convenient visualisation of the uncertainty.
Reposted by Théo Michelot
ecologyofgavin.bsky.social
Recently discovered a fun webpage called Probability Playground where you can interactively explore probability distributions.

It’s helpful especially for distributions with parameters that are not immediately intuitive. Very cool!

www.acsu.buffalo.edu/~adamcunn/pr...
Reposted by Théo Michelot
chrissuthy.bsky.social
Here are some thoughts on teaching #statistics to non-statistical students, specifically those in #applied #ecology degrees. Thanks to Will Kay and Tiago Marques for an enjoyable (and not last) collaboration.
You can access the PDF here 👉 tinyurl.com/33keh22s
Reposted by Théo Michelot
nhcooper123.bsky.social
Going to test out the power of new followers! Does anyone here (or do you know anyone who) teach statistics (specifically GLMs) to primarily ecology/evolution/bio students and would be willing to potentially review a book proposal?