Reca is a package made for the Institute of Marine Research. The package produces predictions of catch-at-age, i.e. the number of fish caught within each age group, of different fish species.
Predicting the catch-at-age of commercial fish species is an important part of the quota-setting process for many diferent species. The Norwegian Computing Center and the Institute of Marine Research have over years developed a Bayesian hierarchical model to estimate the catch-at-age of fish. The model aims to estimate both the proportion-at-age and the mean weight of fish, in order to convert total landings statistics to numbers at age.
The package consists of two main functions; eca.estimate and eca.predict