The Art of Koi Fish Breeding

To be successful at koi fish breeding there are several aspects about these fish that you need to understand. To be successful at koi fish breeding there are several aspects about these fish that you need to understand. Aquatic animals have a specific breeding cycle that depends on a variety of factors including temperature, habitat, and the availability of food. Koi fish breeding is a task that needs to be properly planned. To begin with, you need to determine the breeding season, which is usually late spring or early summer when breeding and spawning commences. The temperatures are conducive to breeding during these seasons when there is plenty of food around. The water temperature and length of the day also play an important role in koi fish breeding. Temperatures of around 20° C induce the releasing of eggs. Eggs mature in females better when the days are longer.

You need to determine mature koi males during the koi fish breeding season. Mature males tend to appear slimmer with large, thick pectoral fins and rougher gill plates. Mature females have pointed pectoral fins and appear plum due to the presence of eggs. Age also plays an important role in successful koi fish breeding. Male breeders ought to be around 3-5 year while females should be between 4 – 6 years old. Older females produce eggs with harder shells, which makes it difficult for the sperm to penetrate and fertilize the eggs. Identify the breeding pair as early as possible is advisable, who must be separated from the rest for at least a month. Most professional breeders keep a ratio of two males for every female in a breeding tank.

It is essential to prepare the koi breeding tank in order for successful breeding. Providing as natural an environment as possible is advisable. Water hyacinths will do well in the pond. However, you may opt for synthetic material which is available in pet stores. Make sure the water contains a neutral pH level and use a water pump to maintain the correct oxygen level in the water. No chlorine and other harmful chemicals must remain in the water.

It is advisable to keep spawning ropes in the pond and secure the ends for easy retrieval. Spawning ropes encourage the koi to lay eggs along the ropes, which protects them from any potential damage. Avoid feeding the koi breeding pair for a few days before they spawn. Females usually spawn within three days when the male is introduced in the koi fish breeding tank. You can keep a close watch during the early hours of the morning when spawning usually occurs. This important period needs to be monitored very closely. The behavior of the koi changes, where the males push the females against the walls of the pond in order to induce them into releasing the eggs. Thousands are released in a single spawning. The males then release the sperm to fertilize the eggs. Froth is normally noticeable on the pond’s surface, which is an indication of spawning.
With the help of spawning ropes, collecting the eggs and transferring them to a separate pond dedicated for koi fry is easily achieved.

During the koi fish breeding process the koi tend to eat their own eggs, therefore, it is essential to remove them as quickly as possible. The next step is to keep the koi fry pond well protected from insects as well. Koi fry usually begin to swim around after a week. However, make sure the pond is well aerated and a water temperature of 20° C is maintained. Small pellets can be given to the fry after a week. The important thing is to remember to feed them at specific intervals.

Nelson writes more about koi fish here: www.koifishinformationcenter.com/koi-fish-breeding. He has raised, studied, bred and cared for hundreds of varieties of Koi. His twenty plus years of practical experience and research are available in his latest book, Insider’s Secrets To Raising Healthy Koi.