Program Branch allows users to define custom survival models graphically in order to estimate survival-related parameters. The program automatically generates the likelihood equation from the diagram, relieving the user of the burden of manual coding. The likelihood, along with the corresponding observed data, is then used to automatically estimate the parameters of interest.

Tool for sample size calculations for tributary survival studies.

POPulation RECONstruction

Estimate population abundance based on full age-at-harvest data, supplemented with harvest effort and auxiliary estimates of survival, abundance, or harvest vulnerability.