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The research objective was to compare the quality in use and nutritional value of muscle tissue of zander (Sander lucioperca) and pike (Esox lucius) reared in a polyculture. The research material comprised 16 specimens (8 of each species) captured from one pond in a fish farm situated in the Lublin Voivodeship. The fish were of similar age. The pike, while having a higher body weight, had a higher percentage of guts, and the carcass percentage and a Fulton’s condition coefficient were lower than in the zander. The chemical composition and calorific value of the muscle tissue were very similar for the two species (water 76.40% and 77.15%; protein 21.26% and 21.41%; lipids 0.41% and 0.58%; ash 1.43% and 1.42%; and energy 517 and 528 kJ/100 g for zander and pike, respectively). It is worth noting the high INQ value for the protein of both fish species (6.8 for pike and 6.9 for zander), which indicates that a 100 g portion of zander or pike fillet is a valuable source of protein in the human diet.

Quality in use and nutritional value of the muscle tissue of zander (Sander lucioperca) and pike (Esox lucius) reared in polyculture