Bruce,
Standardizing might not be the best way to go if you have low counts.
You can possibly assume that events follow a homogeneous Poisson
process and rate varies with night length (linear or quadratic) [Y|x ~
Poisson(phi); log(phi)=f(x)]. You can estimate corresponding
coefficients by glm(). I
Hi all,
Posting this query again as no one replied.
I need to create a way to standardize bat sampling data in northern
latitudes not only by the Activity Index standardized by sample time
(unit effort) but by the constantly changing night length.
This was easy in the tropics with a straight f
Hi all,
Ben Bolker suggested I float this by this group.
After 26 years of living and working the the Neotropics I have moved
back to the U.S.
One of the first issues for relative abundance of bats from acoustic
monitoring is how best to standardize data sets for comparison. It was
easy i
