CONCENTRATED FOOD NUTRITION OF COMMON CARP (Cyprinus carpio L.) UNTIL IT IS ONE-YEAR-OLD

Pokusna proizvodnja -šaranskog mlađa do dobi od godinu dana provedena je u dvjema uzgojnim fazama. U prvom dijelu pokusa obuhvaćena je proizvodnja šaranskog mlađa od ličinke do dobi od četrdeset dana. Tri milijuna komada četrdesetodnevnih šaranslsih ličinaka nasađeno je u ribnjake R3 i R4, odnosno 1.900.000 po hektaru. Prosječna individualna masa i četrdesetodnevnog šaranskog mlađa iznosila je 1,2 g uz konverziju hrane od 0,75, to postotak preživljenja od 24,6. Druga faza obuhva6a nasad i uzgoj dijela proizvedenoga šaranskog mlađa u količini od 70.000 komada po hektaru a objektima R1, R2 i R4, te 156.000 komada u objektu R4. U ovom dijelu proizvodnje, kao i a prvoj fazi uzgoja, a prehrani riba upotrebljena je koncentrirana kompleksna hrana proizvodača riblje hrane iz Ptuja. Izrađena je prema recepturi Zavoda za zoologiju, pčelarstvo i ribarstvo FPZ-a. Prosječna individualna masa riba nakon zimovanja potvrdila je proizvodnju od 2 .959 kg po ha uz vrlo dobar postotak preživljenja od 76,5 to hranidbeni koeficijent 2,16.The experimental production of common carp fingerlings until they are one-year-old, was performed in two cultural stages. The first part of the experiment included production from fry to 40-day-old fingerlings. Three million of fry (1.900.000 indha-1) were stocked in two ponds (R3 and R4). The average individual mass after fourty days was 1,2 g. The food conversion was 0,78 and survival 24,6%. The second stage of the experiment included part these fingerlings in quantities of 70. 000 indha-1 into three ponds (R1, R2, and R3) while 156.000 indha-1 of them were stocked in pond R4. During both stages of the experiment, the concentrated, complex food was used, made by a fish food producer from Ptuj, Slovenia, who prepared it according to the formula prescribed by the Departement for Fiaheries, Bee-keeping and Special Zoology of the Faculty of Agriculture at Zagreb University, Croatia. The average mass of fish after overwintering, insured the production of 2. 959 gh ha-1 along with a very good survival of 76, 6% and food conversion of 2,16