Two four-week feeding trials were conducted with fingerlings of Eurasian perch (Perca fluviatilis, 3.52 ± 0.08 g) and rainbow trout (Oncorhynchus mykiss, 1.49 0.05 fed graded levels dried (DWD) fermented (DWF) duckweed meal (Spirodela polyrhiza). The purpose these two was to evaluate DWD DWF as replacements for fishmeal. Fishmeal protein substituted by 12%, 24%, 35% compared control diets conta...

Survival, growth, and food intake of Eurasian perch (Perca fluviatilis) juveniles from different stocks originating from various geographic regions of Europe were compared under the same conditions of laboratory-scale intensive culture. In Experiment 1, four stocks originating from Italy (I), southwest (SF) and northwest (NF) France, and Belgium (B) were examined at larval and early juvenile (i...

A 4-month study was conducted to determine the influence of daylength on growth, heterogeneity, gonad development, sexual steroid and thyroid levels, and N and P budgets in Eurasian Ž . Ž . perch juveniles Perca fluÕiatilis . Fishes mean weight: 5.1 g were reared in tanks in recirculaty3 Ž . ing systems at an initial biomass of 1 kg m under three different daylengths DL , 12, 18, and 24 h, incl...

In European aquaculture, Eurasian perch, Perca fluviatilis L., is perceived as one of the most highly valuable freshwater fish species and a strong candidate for development aquaculture. pursuit improving quality reproduction in this domesticated species, investigating hormones mediating final oocyte maturation (FOM) therefore indispensable. But, exact nature maturation-inducing hormone (MIH) p...