2.2. Experimental design and procedures
Two experiments were carried out: 1) A digestibility trial followed
by a water sampling period to determine the apparent digestibility
coefficients (ADCs) of dietary nutrients as well as the composition
and magnitude of dissolved nitrogen (N) and phosphorus (P) waste
produced, which enabled the construction of complete N and P budgets;
and 2) a growth study to determine the specific growth rates
(SGRs) and feed conversion ratios (FCRs) of the four diets. The experiments
were carried out at the North Sea Research Centre, Denmark,
using juvenile rainbow trout (Oncorhynchus mykiss) obtained from
Binderup Fish Farm, Denmark.