Abstract
Colour is the most important indicators of quality in ornamental fish, making the exploration to find new sources of pigments in ornamental fish is growing. This study aimed to determine the optimum dose of tubifex and carrot meal combination to enhance the quality of color in Botia Chromobotia macracanthus. This study was designed using Completely Randomized Design with six treatments in triplicates: a) commercial feed (control), b) 70% Tubifex + 3% carrot meal + 27% commercial feed, c) 60% Tubifex + 4% carrot meal + 36% commercial feed, d) 50% Tubifex + 5 % carrot meal + 45% commercial feed, e) 40% Tubifex + 6% carrot meal + 54% commercial feed, and f) 30% Tubifex + 7% carrot meal + 63% commercial feed. Parameters observed were color change level, which was tested using the Kruskal-Wallis method; survival rate (SR) tested using analysis of variance through the F test; and water quality. Results showed that the best color enhancement seen in treatment with 50% Tubifex + 5% carrot meal + 45% commercial feed combination with an average body color of 5.04 in Toca Colour Finder code 0605. The caudal fin color was enhanced with an average score of 3.93 in code 0805.
Highlights
Botia fish (Chromobotia macracantuhs Bleeker) is a native ornamental freshwater fish of Indonesia that live in Sumatra and Kalimantan water[1]
Color is one of the important factors to be considered by fish farmers who work with Botia fish as ornamental fish [3]
The fish feed can be divided into 2 groups, i.e. staple feed with high nutrition contents that are usually found in natural food and additional food that relies on manufactured feed added with vitamins to meet the fish needs [4]
Summary
Botia fish (Chromobotia macracantuhs Bleeker) is a native ornamental freshwater fish of Indonesia that live in Sumatra and Kalimantan water[1]. In addition to its ability to increase fish growth rate and survival, this feed helps to improve the quality of color in ornamental fish, due to its high-fat content that functions as an organic solvent of carotenoid as the main source for color pigment formation in ornamental fish [6]. Carrot meals with high β-carotene content will add the value of fish feed without significantly increasing the price. A study to understand the effect of Tubifex and carrot meal combinations addition to feed on the quality of botia fish color is needed. This study aimed to determine the optimum dose of tubifex and carrot meal combinations to enhance the quality of color in Botia fish
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