My deep sea fishery

Also, the large yellow croaker is a warm wet, and often inhabit in the middle and lower layers within 60 meters of the water depth, it is extremely difficult to catch.

But compared with the bluefin tuna, the big yellow fish is still far away.

Most importantly, the big yellow fish has now achieved artificial breeding.

Although the conditions of breeding are very demanding.

The rectangular pool towards the farming pool, with an area of ​​6 mu, which can maintain a water depth of 2.5 meters, and the bottom of the pool is tilted in the direction of the drain and a certain slope, the substrate is a sandy tester.

The farming location must be convenient for transportation, but also the surrounding environment is quite quiet, fresh water resources, and convenient in evil supply.

Generally, a large yellow fish is required to configure 2 1.5 kWh-water-style oxygen generators, 1 1.5 kWh-flow oxygen generator.

And the environmental environment of the breeding tank needs to meet the relevant provisions of the "Environmental Standard of Non-Pollution Water Product Orientation Environment", and the water quality of the farming should comply with the "Fisheries Water Quality Standard" and "Water Water Water Water Water Water Water Water Water Quality of Pollution Food".

However, the critical conditions, humans can be achieved.

However, with these years, the success of the big yellow-cuvetics technology, the price of rhubarm has not fallen.

Regardless of the breeding of those seedling seeds that have been deceased, the price of the real sea water is very high.

In fact, the difficulty of cultivation of rhubarcings is larger than the difficulty of the average human imagination.

It is said that the steps before the feeding are extremely complicated, and they must first try to disinfect.

Before the fish speculation, put the whole pool to dry the pool water, let the bottom of the pool to expose the sun for a while, remove too much silt.

After stocking the large yellow fish sauce 15 days, it is necessary to completely disinfect with rawfish. It is sprinkled with a water-saving, 150 kg per mu.

It is also possible to use drugs such as tea pie, bleaching powder.

The drugs used in Qingtang shall comply with the relevant provisions of the Non-Pollious Food Fisheries Use Guidelines.

Food and domestication of large yellow fish seedlings is more important in breeding rhubarns.

First of all, the bait is domesticated, the preferred bait is the fish mite processed by fresh and low-value fish and coastal fish and shrimp, and mixed with the squid feed mixed with feed, and then gradually increases the full artificial mixing bait, reducing the amount of fish. Until completely feeds artificially mixed feed.

Workers needed to be fixed at the bait domestication stage, and the feed is placed, and the signal training is required, that is, a fixed signal is issued before the payment, allowing the fish group to form conditions, so that they habits.

If there is no domestication for half a month, then these big yellow cows are basically starved to death.

The dilution treatment of rhubarm is not simple, and many fish seedlings will die during this process.

Dizza treatment is gradually added to the seedlings, reducing the proportion of pool water, making the seedling to grow in fresh water.

The gradient change of salinity in dilution is critical to the growth rate of the large yellow cow, the greater the gradient, the lower the downtime, the lower the survival rate of the large yellow fish fry.

Generally, it takes 7 to 10 days of dimensions. When the salt of the pool reaches 2 ‰ or less, the seedling can be placed in the pond, which is not necessarily inadvertently.

And it is not yet ended.

The stocking seedling species in the case of no disease, no deformity and strong activity, and the stocking density needs to be determined according to the conditions of the pond.

The bait selected for breeding must be a seawater fish to match the feed, and the farmer needs to feed twice a day.

Before the payment, you need a fixed signal to let the fish group form the conditional reflection, so that they habits to eat, and the bait will be raised from less, from the water, you can hear the sound of the big yellow fish "". When the sound is small to the big, it proves that the fish has entered the food field and reaches the food, and the sound is gradually disappeared.

The birth rate of the fish is 7 to 8% of the fish weight, and the middle and late period is 3 to 5% of the fish weight.

The bait should be carried out in strict accordance with the "four custom" principles, and according to the situation of the bait, combine the weather, water temperature, water quality, and fish.

In order to increase the survival rate of large yellow fish, farmers needs to be added to the bait, and the drugs such as aquaculture, and the disease occurred.

Moreover, the bait to breeding the big yellow fish is not cheap. The bait it eat should be all compliant with the relevant provisions of the "limited edition of non-pollution-free food fishing." The drug used should comply with the relevant provisions of the Non-Parisal Food Fisheries Use Guidelines.

Water quality also directly affects the normal growth of the rhubarm, regulating water quality to promote the normal growth of rhubarm, effectively prevent the occurrence of disease, improve the production of farming, and achieve the purpose of increasing production, income.

The water quality of the harbor is fresh, no need to be too fat.

The fish species is from 70 ~ 80 cm in the water level, and fresh fresh water is 5 ~ 10 cm every 2 days, until the highest water level is reached, only replaces water.

In the early spring, the water level in the late autumn is relatively low, which is conducive to improving the water temperature.

Summer, winter two seasons should increase the water level as possible.

Most importantly, it is necessary to change the water every 2 days, and the water exchange is 14 ~ 13, and the average person is a very troublesome thing.

When the water temperature is below 13 ° C, do not change the water.

When the water temperature is higher than 28 ° C, it is necessary to change water every day, and the water exchange is about 13, and in the summer high temperature season, the afternoon drain is grasp, in the evening, so that there will be water stimulus, improve the appetite of the rhubarm, shape the body color.

This kind of difficulties have always led to a high price of large yellow croaker.

As for wild big yellow fish?

It was listed in the "World Nature League Endangered Species Red Directory".

The big yellow croaker was once my country's ocean important economic fish species. Historically, with small yellow croaker, with fish and fish, was listed as one of the four ocean fisheries.

In 1974, the output of Dahuangfish has grown up to more than 200,000 tons, but due to the development of the boat fishery in the 1950s, the cause of fishing and fish in the 60th to 70s, the cause of overwhelming and fishing, and the rush of the large yellow fish resources Decline, in 2000 Donghai production is only 9035 tons, while the official gang, cattle ocean, and the Ocean, etc., can not form fishing.

This is no way, because the economic value of the rhubarm is too high.

The meat of the big yellow croaker is tender, rich in protein, is a fresh food, not only fresh, canned and processed into "melon to raise" "yellow fish", and it can also be used.

The fish of the big yellow fish can be made into a variety of precious foods, such as "fish belly", which can be made into yellow fish gum, which is a raw material for industrial high-grade plycostatics.

And the large yellow fish also has a certain medicinal value, some of the raw materials of the western medicine.

The fish of the big yellow fish can be made into Chinese medicine, which has the effect of treating sinusitis.