Koi breeding is not easy if what you want is to make high-quality fish for competition purposes. Before you can have a prize-winning koi fish, you will need to cull and discard several thousand fry. The koi breeding process is long and hard but it is all worth it.

Selecting the Parents

Choose the male and female from the exact same variety you want to reproduce. If you wish to cross-breed, choose varieties carefully and study more on the kind of offspring you're most likely to get. Keep in mind that the dominant genes are those from the male parent.

Make sure to use only adult fish for breeding applications. The ideal breeding age of the female is from 5 years forward as their eggs are larger and much more fertile. Beware of breeding females under the age of 4 years old as your koi might lose their colors and patterns if bred at a young age. The female koi is ready to spawn if you see it sucking at the sides of the pond, aiming to clear an area where she can place her eggs.

Male koi can begin spawning upon reaching the age of two when small white nodules show up on the pectoral fins as well as on the gill plates. You can actually feel those parts to be rougher than usual. You can utilize the younger males every two weeks but allow a lengthier time interval for older males to make best use of their fertility potential.

Spawning

Koi will naturally spawn in the early summer months. If you let that to happen, however, the eggs will only be consumed by the other fish while the females will be more stressed. The net outcome will be offspring of inferior quality. Moreover, a pond packed with eggs will harbor bad bacteria that will negatively affect the well-being of your koi population.

If you are serious in koi breeding, you will need to use a controlled approach. Put the koi brooders in a separate pond and be sure to hang spawning media from the sides of the pond. The female will need them to place her eggs which can be somewhere between 100,000 to 500,000 depending on her weight. You can make use of ropes, artificial grasses, natural plants, vegetable sacking, or cloth strips as spawning materials.

During courtship, the male chases the female and forces her towards the walls of the pond to initiate spawning. If there are two or three males in the pond, they will group on her to simultaneously fertilize the eggs.

You will find out that the Koi have spawned when there is foam on the surface of the water and the distinct scent of ammonia. By then, you will need to transfer the female to a different pond where she can regain her strength. Take away the males too; or else, they may feed on the eggs.

Culling

The fry will get out of their eggshells in 5 to 7 days. They will keep on growing and you can begin culling on the sixth week. Get rid of the baby koi with deformities such as missing fins, deformed mouths, colorless, and also single color.

Culling is vital in koi breeding. You need to reduce the numbers so the good quality fry can get to a reasonable size by the end of the season. If you don't cull, the undesirable koi will still fight with the good koi for food and also space. Culled fry are usually destroyed or fed to the other fish.

You can release your chosen young koi in a mud pond that is very rich in organic food. As they grow bigger, you can resume the selection process until you get only the ideal koi that you want to keep or sell.

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