Hi everyone,

I have to estimate the repeatability of distances made by fishes. These distances are 1/16 of a lap in a swimming corridor.

I have a zero inflated gamma distribution and I have 2 to 6 measurements/fish (2 to 3 in July and 2 to 3 in September).

For exemple, the repeatability of the number of direction change was estimated using the rpt.poisGLMM.multi function (packages rptR and MCMCglmm).

I tought of transforming my distances by multiplying them by 16, so they could be integers and therefore have a poisson distribution and be treated the same way as the number of direction changes.

I also tought of transforming my data with ln and estimating repeatability with gaussian methods, but then I can't use both Monte Carlo chains and GLMMs in these packages.

Thanks a lot!