Living fossil-squid culture technology in water


There are 8 kinds of carp distributed in the Yangtze River, Heilongjiang and other water systems in China. In addition to the Yangtze River, the Chinese sturgeon is a national first-class protected animal. The golden lustrous Russian pelicans, the glittering pheasants dotted with bright white stripes, and the smart and lovely body pods are all important economic fish.
As these small squid-like squid are hatched one by one, the technique of artificially breeding squid has gradually matured. These healthy naughty little things float up and down, and they will not stop for a moment. They show off their unique vertical lifting skills. There was a bit of anxious crowding together and wondering how to leave this place. They began to look out on the water and imagined the wonderful world waiting for them.
Where will they spend their childhood, and what kind of environment is their favorite home? Usually when carp fry is cultured, it is mainly to select some inner walls that are relatively smooth, like glass jars are more suitable for raising carp. Seedlings, its cost is not much different from the cost of cement tanks, and the cost is lower. In addition, its water supply, sewage and cement pool are more convenient compared to the water from the top of the glass tank, sewage discharge from the middle of the outlet.
Young squids are relatively delicate and must thoroughly disinfect their new homes. Experts told us that using salt to scrub the wall is a simple and economical way.
The home is well-placed and the stomach of the fish should be hungry. Now, what people are most concerned about is how the fry are fed. In fact, freshly hatched fry, like to eat natural foods, nematodes are their delicacies. We can remove the fresh nematodes from the water, wash them several times, remove the dirt attached to them, and chop the nematodes. After mixing thoroughly with water, sprinkle them evenly into the pond. In addition to eating delicious small squid, but also have enough oxygen for them to breathe, so the water in the sink must be constantly updated exchange. what! Can you guess what is in the hanging bucket? Actually, nothing is happening. In order to increase the dissolved oxygen content of water, a clever fish farmer came up with this trick: The contact area between water and air is large, and the amount of oxygen carried is also large. Of course, the fry can also suck more. A few mouthfuls of oxygen.
As the fry grow up day by day, they can gradually feed some compound feeds to ensure their nutrient supply. When the fry grows to 5-7 cm, they are fed 5 times of compound feed and 3 nematodes every day, and then gradually reduce the feeding nematodes. The number of times until the fish grows to 10 cm can be fed only with compound feed.
Although the fry were bred on the same day, their growth rates were not the same, and there was a noticeable size difference. As the saying goes, big fish eat small fish and small fish eat shrimp. In order to ensure their normal growth and development without killing each other, large and small fry should be separated in time. Don't look at the size and simplicity of this. This work is the key technology to ensure the quality of the fish.
After one and a half months of captivity, the squid has been fully domesticated. As commercial fish species, they can adapt to more complex and more varied living environments.
After several years of exploration, it was found that in fact, the characteristics of the fish are a bit warm and watery, and the temperature requirement and the culture area are relatively wide. The 0 to 30°C can survive, and the 15 to 26°C is the best. A wide range of farming, cages, reservoirs, ponds, aquaculture is also good.
Flowing pond culture is currently the most widely adopted method for farming squid at home and abroad. It occupies a small area, the water flow is easy to control, and the feeding of feed is also more convenient. In the time of supply and drainage, a single row per tank can be used. In other words, the inlet and outlet of each pond are relatively independent. In this way, it is possible to effectively prevent the occurrence of salmon caused by cross-contamination. In addition, the inner surface of the fish pond must be smooth, because the catfish like to swim along the pool wall, the body has no scale protection, so it is easy to wipe the pool wall.
Because squid is a standard river fish, they have high requirements for dissolved oxygen and water quality. Therefore, while ensuring the amount of dissolved oxygen in water, we must also pay attention to the pH of the water. The growth of salmon is not good. Therefore, we must control the pH of the water between 7.5 and 8.5.
When the carp is cultured in a flowing water pond, the stocking density is preferably 500 fish per mu. Feeding time is based on the principle of regular and quantitative feeding. It is best to choose granular feed because these compound feeds contain different stages of growth and development of carp. For the various nutrients needed, we can put the feed directly into the pool, usually feeding 4 to 5 times a day, and the daily feeding rate is between 1% and 3%.
The carp is relatively gentle, slow-moving and unresponsive to outside influences. Apart from swimming along the pond wall and swimming at the bottom of the pond, it is not basically active in the middle and upper layers of water. Therefore, during the rearing process, the feed conversion rate is relatively high. high.
Special note: Squid is a fish species that loves to be clean. Therefore, after we feed the feed, we must remove the residual baits in the pool in time to deteriorate the waterproof material and affect the growth of the catfish.
In order to keep the quality of farmed salmon fresh, we can also mix some trout in the pond. This squid not only does not compete with squid, but also eats plankton that affects the water quality.
This artificially controlled carp environment can fully exert their growth advantages. The growth rate of artificial breeding is much higher than the growth rate under natural conditions. When the annual water temperature is around 20°C, the first year of carp can grow to about 1kg, and it can grow to 10kg in four years, and the annual income increases. More than twice as much.

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