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A study was conducted over a 84‐day period to evaluate glycine, L‐glutamic acid and L‐glutamine as sources of non‐essential amino acids (NEAA) in dietary ‘protein’ consisting of crystalline amino acids only. The study was performed with a total of 1200 rainbow trout fingerlings (Oncorhynchus...
A trial was undertaken with juvenile Nile tilapia fed graded levels of dietary protein (0–35% DP) over 7 weeks (28°C). Measurements of nitrogen and energy utilization were made using data on ADC, comparative carcass analyses, nitrogen excretion and oxygen uptake. Data indicate that the daily...
In two experiments the effects of wide range of feeding intensities on energy and protein retention and on efficiency of utilization of energy and protein by carp (Cyprinus carpio L.) were studied. The feeding period varied between an initial live weight (LW) of 160g to a final LW of 520g. The...
The time course of plasma amino acid concentrations was studied in adult rainbow trout (300 g mean body weight). After a starvation period of 2 days fish were force‐fed either with fish protein concentrate or a mixture of acidic casein and Na‐caseinate at a rate of 0.32% CP (N' 6.25) of body...
The precise feeding of fish entails a mineral supply tailored to meet requirements. The aim is an optimal supply status, that manifests itself in excellent health and productivity, combined with minimal water pollution. Having considered possible methods for determining requirements (i.e....
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