Wplyw skladu paszy na wybrane wskazniki chowu, stan fizjologiczny, wartosc odzywcza miesa i stezenie melatoniny we krwi i ciele kroczka karpia [Cyprinus carpio L.]
The effect of feed composition on selected culture indicies, physiological state, nutritive value and melatonin concentration in blood and body of 1-year-old carp [Cyprinus carpio L.]