PASSAGE TIME OF ARTEMIA-NAUPLII THROUGH THE GUT OF TENCH (TINCA-TINCAL.) LARVAE AT 22-DEGREES-C

The experiment was carried out on tench larvae aged 14 and 19 days. Th ey were fed Artemia nauplii and the time of food passage through the l arval gut was assessed. The time of fully emptying of gut of whole fis h sample (no Artemia. in the gut of 10 indiv.) reached 6 h and 7 h in the larvae aged 14 d and 19 d, respectively. In younger larvae 50% of initial gut filling was observed between 1 and 2 h of gut emptying, wh ile in older ones between 2 and 3 h. The time required for total empty ing of 5 individuals (50% of sample size) from the each age group was 2 h and 5 h, respectively.