Szczyglińska A., 1983. Variability of taxonomic features in some perch (Perca fluviatilis Linnaeus, 1758) populations from freshwater reservoirs of northern Poland. Acta Ichthyol. Piscat. 13 (1): 39-62.
The paper presents an analysis of taxonomic features from one river and six different lake populations of perch (Perca fluviatilis L.). Values and variability of meristic features were determined, as also their relations with individual body length. Morphology and meristic features of lake perch populations were compared with river population of this species.