Occupancy modelling - tips on including covariates in Program PRESENCE
Darryl is often asked about the correct way to include covariates in the design matrices in Program PRESENCE....
October 22, 2018
October 22, 2018
Workshops galore!
Since our last update, Darryl has spent most of his time globe trotting, running workshops in Australia and...
September 26, 2018
Occupancy modelling - home range vs grid cell size
Darryl has often seen examples where researchers are using occupancy-based metrics and define the size of a sampling...
September 25, 2018
Hector's dolphins and snow leopards
Here's a couple of quick highlights from the past month. South coast South Island Hector's dolphin project update We have...
August 23, 2018
Dolphins, penguins and cats!
It's been another busy month working on a variety of projects, but here's some highlights that we've managed...
August 23, 2018
How to calculate odds ratios from logistic regression coefficients
When analysing data with logistic regression, or using the logit link-function to model probabilities, the effect of covariates...
July 13, 2018
Interpreting confidence interval overlap - you might be doing it wrong!
People will often compare two confidence intervals and if they do not overlap, take that as evidence of...
July 13, 2018
Round the world in 18 days
The last few months have been extremely busy at Proteus, but here's a quick overview of some of...
May 31, 2018
Animal welfare, fish and training
April and May have been busy months and we've been working on a range of interesting projects. Animal welfare...
May 30, 2018
Spatial correlation and the independence assumption with occupancy modelling
Independent observations is a key assumption for many statistical methods, including occupancy models. People are often concerned about...
April 20, 2018
Something old, something new
We've been developing our social media presence, using R to create images of famous quotes, and worked on a couple of projects with a difference this month.
April 17, 2018
Beer bottles and mark-recapture?
How many bottles of beer were drunk at the West Taieri Rugby Football Club after a game? We can use mark-recapture methods to estimate this!
March 20, 2018
Occupancy modelling - more than species presence/absence!
In this video Darryl MacKenzie provides an overview of occupancy modelling, noting that it is for more than just species presence/absence
February 24, 2018
Sample size tips for closed population capture-recapture studies
In this video Darryl provides some tips on sample size considerations for estimating abundance or population size with closed population capture-recapture (or mark-recapture) methods. Here is the R code used to create the plots discussed in the video.
January 18, 2018
Our plans for the future and bilby distribution
What's in store for Proteus in 2018?
January 17, 2018
Considerations when using continuous-valued covariates
Darryl gives some tips on important considerations when using continuous-valued covariates in analyses
December 16, 2017
Beer fridge statistics
Darryl uses the contents of his beer fridge to explain the relationship between probabilities, odds and odds ratios.
November 02, 2017
Interpreting confidence intervals
In this month’s video tip Darryl explains how we should interpret confidence intervals.
November 01, 2017
New website and kangaroo abundance
If you’re reading this post then you’ve already found our new website! Welcome! The entire website has been...