Techniques for factory cycle aquaculture of California bass
California perch is a kind of fresh water fish introduced from America. It has delicious meat and strong adaptability. In recent years, it has been widely promoted in China. California perch is highly profitable, so it is popular among aquaculture farmers. California perch has been expensive in recent years. With the continuous improvement of breeding technology, the yield per mu is higher and higher. In contRASt, high profits attract many people. To raise California perch, so California perch has been praised as the fifth most popular fish in China.
With the rapid expansion of California bass farming area, California bass fry has become a sought-after product. But from California bass eggs to commercial California bass fry, there is a process of California bass fry breeding. At present, from the situation in recent years, the overall survival rate from California perch spray to California perch commercial fry is not more than 5%. The reason is that California perch vaccine technology as a whole is not up to standard, which involves many links. Below, we will discuss what key links are needed for California perch vaccine technology.
The first step is selection, and the success of the California perch depends largely on the quality of the herring. California perch herring need to be relatively distant related. At the same time, to be kept in good water conditions for more than two years. To prevent the species from deteriorating, it is also necessary to bring in unrelated males or females from other places, since many fry depend on the genes of both females and males. California perch has to be optimized for a long time before it can be oxytocin. In the natural state, the California perch is able to lay eggs by sensing changes in the water temperature, but in the case of artificial intervention, often by injecting the herring with oxytocin, which tends to result in a lower quality of eggs produced when the herring is weaker. California perch born after hatching are weak in their spouts. High death rates, deformities and other problems. Therefore, species were selected for California perch. Seedling technology is very important. The fertilized eggs of California perch are usually attached to the heald. Increase the volume of water by changing the temperature of the water. Can improve the hatching rate of California bass eggs.
After the eggs hatch, the newly born fish, we call it the splash, comes out of the egg shell with a certain amount of yolk, this yolk is also very high nutritional value, particularly high, can support the splash in 2 to 3 days, without the intake of external nutrients. The spray opening usually takes in some of the plankton in the water, because the California perch, also known as largemouth bass, has a larger breath than other fish. Therefore, plankton such as rotifers, cartesians and copepods can be taken from the water, mainly zooplankton, or artificially incubated year worms can be fed at the water opening.
Water quality, California perch spray water quality requirements are relatively high. Key water quality indicators, such as pH, pH, temperature and dissolved oxygen, should be matched. To make sure the spray can open smoothly. At the same time, the level of ammonia nitrogen and nitrite in the water should be kept almost zero. There should be as little organic matter in the water as possible, which can minimize the growth of bacteria and viruses in the water.
In recent years, out of season California bass fry breeding technology gradually mature. Out of season California bass seedling cultivation needs to be done under factory conditions. This requires the support of factory aquaculture equipment. According to the water quality requirements of Perch in California, we use some pure oxygen oxygenation equipment to oxygenate the water, use biological filtration system to remove ammonia nitrogen and nitrite in the water, use constant temperature equipment to automatically regulate the temperature of the water, and manually add some chemicals to stabilize the pH of the water. To improve the success rate of Californian perch seedling by making it grow in a relatively clean and clear environment with stable water quality.
