Goldfish breeding - Management of spawning incubation

During the spawning season, goldfish management typically begins in spring. Before and after the Qingming Festival, when water temperatures rise above 10°C and light conditions are favorable, male fish start chasing females in groups of 2-3. This behavior indicates that the broodstock is becoming sexually active and preparing for reproduction. In normal spawning conditions, when the water temperature reaches around 12°C, selected spawning nests should be prepared—either bundled together or placed individually on plants, arranged in a circular or flat shape. This increases the surface area for egg adhesion and is then placed into the spawning pool. The next morning, males become more active, quickly catching females who then dart into the nest, moving back and forth. Males follow closely, rubbing their heads, gills, and pectoral fins against the female’s belly. As the female becomes stimulated, she swims faster, sometimes even leaping out of the water. When the spawning climax is reached, the female contracts her abdominal muscles, releasing eggs. At the same time, males release sperm, which fertilizes the eggs in the water. Fertilized eggs stick to the nest or the sides of the spawning tank. The size of the eggs ranges from 0.8 to 1 mm, and their size depends on the female's nutrition, growth, and overall development. During the spawning period, it's crucial to monitor the fish regularly and address any abnormalities promptly. If a female shows delayed spawning—often referred to as "the door not opening"—it could be due to an insufficient number of males or weak individuals. In such cases, adding more males or replacing them can help. However, if there are too many males, they may over-chase the females, causing exhaustion or even leading to males being chased by each other, resulting in slow movement or surface gasping. In these situations, temporarily separating the males and females is recommended. Additionally, any signs of bruising or scratching on the fish should be treated immediately. It's also important to monitor the spawning area. Once a nest is filled with eggs, it should be removed and placed in a hatching pond, then replaced with a new nest to prevent eggs from falling to the bottom or sticking to the walls, which can cause damage. After the eggs are laid, the nests should be removed promptly and transferred to the hatching tank. Proper care during spawning is essential. First, ensure the broodstock is well-fed and properly managed to promote gonad development, which significantly affects the number of eggs laid and their fertilization rate. Before spawning, feed the broodstock live food to support their energy needs. During the spawning period, they may lose appetite due to heat, so feeding should be moderate. After spawning, when their appetite returns, gradually increase feeding to aid recovery. Every day after spawning, change the water once in the afternoon. Spawning often leaves some eggs along the edges of containers and results in unfertilized eggs or excess semen in the water, all of which consume oxygen. This can lead to low dissolved oxygen levels, causing the fish to float at the surface in the morning and potentially leading to mass deaths. Even if spawning isn't heavy, neglecting water changes can still cause problems. The water may turn slightly milky with a strong odor, indicating poor quality. Regular monitoring and timely water changes are essential to maintain a healthy environment.

Vitamin

Vitamins Feed Grade Meal,Water Soluble Vitamin,Vitamin Mineral Water,Poultry Feed Grade Vitamin

Vitamins Feed Grade Meal,Water Soluble Vitamin,Vitamin Mineral Water,Poultry Feed Grade Vitamin

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