Evaluation of natural foods and starters for carp larvae from the angle of nitrogen assimilation.

alevines aliment pour animaux alimentation des poissons biomasa biomass biomasse carp carpa carpe contenido proteico cyprinus excretion feed intake feeds fish feeding fish larvae fourrage grain grain feed granos pienso inanition larve de poisson nitrogen content nitrogen metabolism piensos protein content raciones ration rations starvation teneur en azote zooplancton zooplankton