Koi's selection and breeding techniques
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Koi is a majestic and elegant ornamental fish, known for its vibrant, crystal-like colors, graceful movements, and striking patterns that make it a favorite among fish enthusiasts. These beautiful creatures have captivated people for generations, not only for their appearance but also for the calm and serene presence they bring to any aquatic environment.
Selecting high-quality koi starts with careful juvenile selection, which is one of the most critical steps in the breeding process. Typically, breeders perform 3 to 4 rounds of selection within the first three months after hatching. The timing of these selections varies depending on the variety, growth rate, and when the distinctive markings begin to appear. For example, Showa tricolor koi are usually selected after two weeks, while gold system koi are selected around day 50. Red-white and Taisho three-color koi are typically selected after about 60 days. In general, the selection process begins once the fry reach a length of 3 to 5 cm.
Breeding koi involves several key factors. First, the feeding space should be carefully designed. Koi can adapt to different environments, so they can be raised in aquariums or ponds. However, it's important not to overcrowd the tank with too many decorations, as this can stress the fish. Second, water temperature plays a vital role in their health and vitality. Koi can survive in a wide range of temperatures, from 2°C to 30°C, but they thrive best between 20°C and 25°C. At this temperature, they are more active, eat well, and display brighter colors. When kept in an aquarium, the temperature can be maintained consistently between 20°C and 25°C year-round, ensuring a comfortable and healthy living environment.
Lastly, proper nutrition is essential. High-quality koi food is recommended, with each kilogram of fish consuming approximately 30 grams of food per day, divided into 3 to 4 feedings. This consistent diet helps maintain their health, coloration, and overall vitality. With the right care and attention, koi can flourish and bring beauty and joy to any aquarium or pond.
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