Original scientific paper
THE INFLUENCE OF DIFFERENT KINDS OF FOOD ON THE ABIOTIC WATER PARAMETERS IN THE CULTURE OF CARP FRY
Ivan Bogut
; Poljoprivredni školski centar, Osijek
Andelko Opačak
; Poljoprivredni fakultet, Osijek
Ivan Stević
; VRO »Vuka«, Osijek
Abstract
Investigations on the influence of different food on the abiotic parameters of water were carried out in 9 fish ponds on the Koprivna fish farm. 1.3 million carp fry were stocked in each pond, and the growth period lasted for 25 days. In treatment 1, larva and fry were fed with starter food from "Boha", in treatment 2 the food consisted of 50% starter food from "Boha' and 50% dry beer yeast, while in treatment 3 the fry were fed exclusively with beer yeast.
The experiment showed the interaction of the mentioned food and their quantities on the daily and periodical fluctuation in water with dissolved oxygen, transparency and organic pollution of the water.
The daily and periodical concentration of dissolved oxygen was significantly higher in the fish ponds where the fry were fed with the beer yeast. An expressed correlation was established between the amount of daily food intake, the concentration of dissolved oxygen, the transparency of the water and organic pollution of the water. Daily feedings over 80 kg/ha are not recommended if there is no water flow or additional aeration.
Keywords
Hrčak ID:
77088
URI
Publication date:
16.12.1992.
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