Hi,

This is a very basic question that I hope someone can answer with one word.

From the literature: Most crucial assumption is capture probability remains homogenous over the study.

My best fitting open population model (POPAN) uses a time dependence estimate for capture probability.

Does using this model violate the assumption?

I am trying to get a population estimate of eels passing through a barrier. There are no environmental (short study), behavioural (no avoidance), or biological factors (all young females) that would skew individual capture probabilities, before or after tagging. So I thought the capture probability would remain the same for all individuals.

Does the time dependence apply to the entire population? I.e. the capture probabilities remain homogenous for individuals across the study, but at each sampling point it can change so it doesn't actually violate the assumption?