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. (2001). Does Density-Dependent Individual Growth Simplify Dynamics in Age-Structured Populations? A General Model Applied to Perch, "Perca fluviatilis". IIASA Interim Report. IIASA, Laxenburg, Austria: IR-01-025