Similar title to Ylikarjula, J., Heino, M. ORCID: https://orcid.org/0000-0003-2928-3940, Dieckmann, U. ORCID: https://orcid.org/0000-0001-7089-0393, & Kaitala, V. (2002). Does density-dependent individual growth simplify dynamics in age-Structured populations? A general model applied to perch, Perca fluviatilis. Annales Zoologici Fennici 39 (2) 99-107.