Efficiency of live feed use in rearing juvenile angelfish Pterryptophyllum scalare (Schultze, 1823) (Perciformes: Cichlidae), Pinoy Paraiba variety
Radchenko D.E. 1
Year: 2026, Number: 2, Pages: 76-81
The juveniles of the freshwater angelfish Pterophyllum scalare (Schultze, 1823), Pinoy Paraiba variety, were selected for the experiment aimed at evaluating feed efficiency. The fry selected (age 25 days; mean fork length 1.85–1.87 cm; mean body weight 0.3–0.39 g) were assigned to a control group and an experimental group (n = 94 per group) using the analogue method. The experiment lasted for 6.5 months. The mean length of juveniles in the control group, which received pelleted food, grew from 1.85 ± 0.02 cm to 4.27 ± 0.01 cm, whereas that of the experimental group, which received live feed, increased from 1.87 ± 0.01 cm to 4.14 ± 0.02 cm. Mean body weight rose from 0.33 ± 0.008 g to 1.56 ± 0.033 g in the control group and from 0.39 ± 0.01 g to 1.45 ± 0.01 g in the experimental group. The highest growth rates were observed for juveniles aged 3–3.5 and 5 months. These results can be used in formulating a balanced diet for juvenile angelfish reared in captivity.
DOI: 10.25221/2782-1978_2026_2_7
Keywords: juvenile angelfish, Primorsky Aquarium, live feeds, length–weight composition, growth rates,
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