|Title||Assumptions behind size-based ecosystem models are realistic|
|Author(s)||Andersen, Ken H.; Blanchard, Julia L.; Fulton, Elizabeth A.; Gislason, Henrik; Jacobsen, Nis Sand; Kooten, Tobias van|
|Source||ICES Journal of Marine Science 73 (2016)6. - ISSN 1054-3139 - p. 1651 - 1655.|
|Publication type||Refereed Article in a scientific journal|
|Keyword(s)||Balanced harvesting - Cohort biomass - Size-spectrum model|
A recent publication about balanced harvesting (Froese et al., ICES Journal of Marine Science; 73: 1640-1650) contains several erroneous statements about size-spectrum models. We refute the statements by showing that the assumptions pertaining to size-spectrum models discussed by Froese et al. are realistic and consistent. We further show that the assumption about density-dependence being described by a stock recruitment relationship is responsible for determining whether a peak in the cohort biomass of a population occurs late or early in life. Finally, we argue that there is indeed a constructive role for a wide suite of ecosystem models to evaluate fishing strategies in an ecosystem context.