Effects of Different Live Feeds on the Color Intensity, Growth Performance, and Survival of Koi Fish Fingerlings (Cyprinus rubrofuscus)

Document Type : Original Article

Authors

1 Department of Aquaculture, Faculty of Food Security, Universitas Negeri Surabaya

2 Department of Aquaculture, Faculty of Fisheries and Marine, Universitas Airlangga

3 Aquaculture Study Program, Faculty of Fisheries and Marine, Universitas Airlangga

4 Noto Centre for Fisheries Science and Technology, Kanazawa University

Abstract

This study evaluated the effects of different live feeds on color intensity, growth performance, and survival of koi fish (Cyprinus rubrofuscus) fingerlings. A completely randomized design was employed with four treatments: P0 (control, no live feed), P1 (Tubifex), P2 (Artemia), and P3 (Daphnia), each with three replicates containing 250 fingerlings. Over a 49-day rearing period, significant differences were observed among treatments. The highest color intensity was recorded in the Tubifex-fed group (mean score: 2.86), followed by Artemia (2.73), control (2.26), and Daphnia (2.18). Specific growth rates (SGR) were the highest in the Artemia group (4.75%/day) and the lowest in the control group (3.53%/day), though these differences were not statistically significant. Survival rates were at their highest in the Tubifex group (95.10%), followed by Artemia (85.30%), Daphnia (64.90%), and control (62.00%). Analysis of variance indicated that live feed type significantly affected color intensity and survival (P< 0.05), deducting growth performance (P> 0.05). These findings suggest that Tubifex and Artemia can enhance the coloration and survival of koi fingerlings, highlighting the importance of selecting appropriate live feeds in koi fish hatchery phase.

Keywords

Egyptian Journal of Aquatic Biology and Fisheries
Volume 29, Issue 5
September and October 2025
Pages 2821-2834

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