From a basic fisheries science perspective, this chapter illustrates how:
1. A very simple Beta-Binomial model is built to mimic a markrecapture experiment. The conditional dependencies network of this model are conveniently and efficiently summarized by means of a directed acyclic graphical representation. For this simplest DAG, only two nodes are necessary (one parameter and one observable, probabilistically linked by a very simple conditional relationship) with no latent layer involved.