By implementing different observational likelihoods in a state-space age-based stock assessment model, we are able to compare the goodness-of-fit and effects on estimated fishing mortallity for different model choices. Model fit is improved by estimating suitable correlations between agegroups. We show by simulations that modelling catch as numbers-at-age is more suitable than proportions if the uncertainty of age-classifications is small
|Publication status||Published - 2015|
|Event||ICES Annual Science Conference 2015 - Copenhagen, Denmark|
Duration: 21 Sep 2015 → 25 Sep 2015
|Conference||ICES Annual Science Conference 2015|
|Period||21/09/2015 → 25/09/2015|
Bibliographical noteICES CM 2015/A:11
Albertsen, C. M., Nielsen, A., & Thygesen, U. H. (2015). Choosing the observational likelihood in state-space stock assessment models. Abstract from ICES Annual Science Conference 2015, Copenhagen, Denmark.