Assumptions behind size-based ecosystem models are realistic

Ken H. Andersen*, Julia L. Blanchard, Elizabeth A. Fulton, Henrik Gislason, Nis Sand Jacobsen, Tobias van Kooten

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1651-1655
JournalICES Journal of Marine Science
Issue number6
Publication statusPublished - 2016


  • Balanced harvesting
  • Cohort biomass
  • Size-spectrum model


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