140
Radioisotopic Methods for the Study of Nutrition in Aquatic Animals
BREAM
LARVAE
LABELLED AGLAE
+BOSMINAE
(I-3 DAYS)
LABELLED
BOSMINAE
c -
q
ADAPTA TION OF
LARVAE (1-2
DAYS)
LABELLED
LARVAE +
W
NONLABELLEDI-_ _
BOSMINAE
fc
LABELLED
LARVAE
LABELLED
LARVAE
O 2
CONSUMPTION
CONSUMPTION
OF FOOD
LABELLED BOSMINAE
+ LARVAE
LARVAE
ASSIMILATION
OF FOOD
LABELLED BOSMINAE
+ LARVAE
Fig. 3.17. Schematic representation of the experiments for determining the elements
of food balance in fish larvae
Ra is the radioactivity of the labeled food material incorporated by consumers
after they have digested the portion of consumed labeled food with radioactivity Rc. cpmsp.-l (see Sect. 3.5.3); Tc is the radioactivity of 14C02, respired by
consumers during the digestion period, cpmsp.-l (see Sect. 3.5.3); R f is the
radioactivity of feces, cpmsp.-l (see Sect. 3.5.3).
On condition that the counting efficiency during the radio assaying of all
the above components of the balance equation are equalized by the method