Reproduction of Hatchery-Reared Pike-Perch (Sander lucioperca) Fed Diet with Low-Marine-Ingredients: Role of Dietary Fatty Acids

This research aimed to evaluate the reproductive potential of hatchery-reared (F1) pike-perch (Sander lucioperca) broodstock fed a commercial diet with low levels long-chain polyunsaturated fatty acids (Lc-PUFA) and wild (F0) forage fish. Reproductive parameters, including pseudogonadosomatic index (PGSI), egg size, latency time, hatching rate, embryo survival, eggs’ acid (FA) composition, as well plasma sex hormone, glucose immunoglobulin after hormone injection, were analyzed. The results showed PGSI (10% in F1 vs. 14% F0) survival (24% 61% broodstock, but satisfactory rate (63% 78% larval size (4.6 mm 4.7 F0). A arachidonic (ARA) percentage fish eggs (1.32%), along increased (17.31 g/L), suggests that immune system activation might have depleted reserves ARA fish, which is key for successful oocyte maturation. We assumed administration more sustainable diets, based on terrestrial plant ingredients, not inferior higher-quality diets marine ingredients.