THE INFLUENCE OF OXYGEN CONCENTRATION VARIATION IN WATER ON ITS CONSUMPTION BY RAINBOW TROUT FINGERLINGS (Salmo gairdneri Richardson)

Opisan je način određivanja koncentracije slobodno otopljenog kisika u dolaznoj vodi kojom se opskrbljuju bazeni u kojima se uzgajaju riblji mlađ i način proračunavanja količine kisika što ga potroše ribe. Korist od redovita laboratorijskog ispitivanja sadržaja kisika u dolaznoj vodi i njegove potrošnje očitovala se u spoznaji o mogućnosti opterećenja uzgojnih jedinica ribom, a time i o optimalnoj iskorištenosti uzgojnog prostora.A mode of defining free dissolved oxygen concentration in in-flow water which supplies the basins with fish fingerlings, is described. The calculation of oxygen consumption by the fish is also defined. The benefit of regular oxygen contents laboratory tests of in-flow water and oxygen consumption is revealed in actual possibility to burden culture units with fish and consequently, to enable high utilization level of the cultured area