Blogs
New paper: Environmental conditions modify density‐dependent salmonid recruitment: Insights into the 2016 recruitment crash in Wales
Paper published in Freshwater Biology
statistics
code
environmental-change
\(^{0}\) Formerly Salmon & Trout Research Centre, Game and Wildlife Conservation Trust, East Stoke, Wareham, Dorset BH20 6BB, UK \(^{1}\) The Centre for Environment…
(Mixed) Logistic regression in JAGS
Fitting fixed and contrasting specifications of mixed effects logistic regression in jags using dclone
environmental-change
tagging-and-telemetry
allee-effects
invasive-species
Here is a quick post showing how to do a fixed effect logistic regression in jags, extend it to a mixed effects logistic regression and show how it can be…
New paper: Scale-dependent drivers of Atlantic salmon parr lengths
Paper published in Freshwater Biology
environmental-change
tagging-and-telemetry
New paper: scale-dependent drivers of Atlantic salmon parr lengths
Running JAGS in parallel
Examples using dclone, foreach, snow and snowfall
environmental-change
tagging-and-telemetry
allee-effects
invasive-species
Sometimes, I run…
Get ready… set… go! Frome salmon smolt run 2017
Quantifying the number of migrating juvenile Atlantic salmon smolts leaving the river Frome, Dorset
environmental-change
tagging-and-telemetry
Every year, the GWCT monitors migrating juvenile Atlantic salmon (Salmo salar L.) smolts leaving the river Frome, Dorset, on their way to their…
Calculate distances along a river in R and GRASS
Least cost distances between points on a river
environmental-change
tagging-and-telemetry
invasive-species
allee-effects
Recently, I have been helping Jessica E. Marsh to develop a method of calculating distances along linear features.…
New paper: Flow and Atlantic salmon redd distribution
Salmon redds clustered in mid-river when flow is low, with consequences for density-dependent mortality in emerging fry.
environmental-change
Our paper “The effects of flow on Atlantic salmon (Salmo salar) redd distribution in a UK chalk stream between 1980 and 2015” is out today in Ecology of Freshwater Fish!
Coordinate conversions in R
British National Grid to latitude and longitude conversion
environmental-change
tagging-and-telemetry
allee-effects
invasive-species
Here, I present a short procedure for converting British National Grid coordinates into latitude and longitude coordinates.
Estimating sea trout smolt migration risks
Analysis code for a simple state-space model to estimate acoustically tagged sea trout migration risks
tagging-and-telemetry
statistics
code
I’m involved with a project aiming to understand brown trout (Salmo trutta L.) movements in freshwater and estuarine environments.
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