How to breed crabs intensively indoors?
First of all, I have never raised a crab. If there is any mistake in the following content, please take a needle to prick me! I have a thick skin.
Since 2009, when customers in Malaysia used an eco-farming box to breed crabs, the concept of crab breeding box has been widely cited as high-tech by most people in the country. But similar systems exist in Japan, similar to those used in water culture boxes. But in recent years crab consumption in the domestic trend gradually, the market demand is also increasing. In particular, the attractive price of soft-shell crabs attracts a large number of people to find ways to purchase crab breeding box for intensive breeding. Unfortunately, most of the first people who ate crabs failed because rats had a rat's way and snakes had a snake's way. In every industry, there is a recipe for success. And these success tips are not easily accessible to the average layman. Success is the accumulation of many details, and a failure in one link may lead to the failure of breeding. As a result, online Shouting and Shouting and killing everywhere. Unintentionally clicking on a page is like this:
A word appears in the baidu drop-down menu, indicating that more people search for the word. It also reflects the mood of some people after they failed to raise crabs in boxes. But when it comes to raising crabs in boxes, more people talk about the advantages of boxes from a positive perspective. And risk, cost, technical support and other factors are unknown, or deliberately avoided.
Many people do not know in, saw CCAV on the TV, feel that they have mastered the core secret, eager to try. But afraid not small investment into meat bun beating dog, there is no return. Therefore I hesitate and hesitate.
As the saying goes, "if you want to test the power of god, you must first go from the palace", haha. Raise a crab, need not from the palace, use a pair of fire eye gold eyeball only first. Below, I this aquaculture is half hanged son to talk about a few things that the box raises crab with everybody, a word of a family, make reference only. If it's not true, it's a joke.
Why raise crabs in boxes?
The crab used to be known as the "general running amok". Yes, it was a bronze helmet and iron armour. It is inevitable that something will happen with a disability. There was no sign of arm-amputated komatsu in the market, so people began to think about how to get crabs to live in the presidential suite, to collect monkeys, to fight less, and to eat more meat.
Another important reason is the rise of soft-shelled crabs. The crab has just shed its shell, and its body has not hardened yet. And it is said that the chitin contained in the unhardened carapace is beneficial to the heart and brain vessels of human beings. High-end hotels, seafood restaurants, soft-shell crabs are all in the range of 3 to 4 hundred yuan per kilo, while pond crabs cannot be found and collected in the first time. Therefore, crab ecological breeding box is a better choice.
The advantages of keeping crabs in boxes
1.Save the land, general tutang farming, an acre of land can probably grow a few hundred kilograms of crabs is good. In indoor aquaculture with recycled water and boxes, 30 square meters can raise about 1,000 crabs.
2. Not affected by weather, water pollution and other factors. Investment risk is small. The earth pond does not say, basically see day to collect. In the extreme weather, the flood gushed and there was no harvest.
3. Convenient management. Using the circulating water system and breeding box to raise crabs, it can be fed and harvested centrally. The collection of soft-shell crabs is simple and easy to operate.
4.Fight less, of course. Fighting is not good. No fight, no bargain!
5. The design of the box generally conforms to the habits of crabs. Whether they like darkness or light is their common feature.
6. It is compatible with the circulating water treatment system, with excellent and stable water quality. Is the basic premise of high yield. Water treatment system can control water temperature, PH, ammonia nitrogen, nitrite and other indicators within a reasonable range. Avoid dRAStic fluctuations in water quality. This provides a five star water environment for crabs to grow.
7. It is mainly temporary nourishing fertilizer, and it is better to step on the rhythm of market price fluctuation, enter at low price and ship at high price. In wenzhou, for example, crab prices fell after the Mid-Autumn festival. At this time, a large number of purchases can be made, all goods will be shipped before the lunar New Year, and the market price at the end of 2017 will be more than 300 yuan per jin. The benefits are considerable.
The disadvantages of keeping crabs in boxes
1.The labor cost of feeding and harvesting is a little high. Take 10,000 boxes for example. At least 2-3 people are required to do continuous feeding and observation work.
2. The initial one-time investment of equipment, site and other costs are relatively high. Of course, this reward cycle should be combined with the way of farming.
What kind of people are suitable for raising crabs in boxes？
1. Have relevant breeding technology and experience in crab breeds. Fully understand the life and growth habits of crabs.
2. Places with low cost of water source and heat source. Guangdong generally does not need heat preservation treatment, while northern winter crab breeding needs to heat up, which will cause a large increase in costs. In addition, in some places, the water quality of the water source is particularly good and has not changed much over the years. The water quality can be used directly without the treatment of circulating water treatment equipment. The cost will be further reduced.
3. The origin and sales market of crabs are relatively close. We emphasize that the box is only suitable for temporary crab breeding, rather than for growing up. Because the cost of the box plus the circulating water treatment system is a large investment, if you raise the crab from a small age to a large one, the absolute weight gain speed is small, so it is not cost-effective. Therefore, we do not recommend raising crabs in boxes.
4. It is recommended that you visit the manufacturer of aquaculture box, water source and circulating water treatment system after the above conditions are met. Aquaculture is a very careful thing, and the success of aquaculture is made up of many details. A lack of detail can lead to breeding failure. Therefore, the preliminary investigation is very necessary.
The structure of the box is important to the success of the breeding
1. First of all, the box should meet the size required by the crab's temporary feeding in structure. If the size is too small, the crab will stop eating due to restricted activities at the later stage of the temporary feeding.
2.The material of the box should meet the requirements of food grade. If too much recycled material is used in the production box, unhealthy chemical components will be precipitated out, which will be absorbed by the crabs, and indirectly affect the healthy production of people.
3. The inlet and outlet of the box should be reasonably designed. Generally, water inlet is filled by a small hole in an inlet pipe, and the outlet pipe is generally set as overflow outlet water. But the location of the inlet pipe, the structure at the bottom of the box, determines whether the drainage is smooth. If the sewage is inconvenient, it will not only increase the cost of manual decontamination, but also cause the decomposition of bait or crab excrement, and the nitrate and ammonia nitrogen in water will increase rapidly. Crabs can die of poisoning. So. The design of crab aquaculture box is very important.
4. Location of sewage outlet. The crab drain must be at the bottom of the box. In addition, with the bottom blowpipe and valve, the water in the box can be drained out in a short time, and the rapid impact of the water will be used to wash away the dirt concentrated at the bottom of the box. Without this design, the water would quickly deteriorate, threatening the crab's life.
5. After the box and box are superimposed, there should not be too many gaps left to prevent crabs from escaping.
6. The door and feeding port of the box shall be properly designed to facilitate feeding and observation. It also minimizes the disturbance to crabs. It affects its growth. If there are too many holes in the door of the crab breeding box, it will not only cause bad effects to the crab if the light is too strong, but also cause the crab to break through the door and run away.
Supporting the composition and function of circulating water system
For a set of 1,000 boxes, the total water volume is 6-7 cubic meters. Generally, the circulating water treatment system will be customized according to the water source and heat preservation situation of the breeding site. If the local water quality of the customer is good, it can be directly aquaculture without circulating water equipment. If the customer is in the south, the thermostat may not be needed. The complete set of circulating water equipment includes the following parts
Sedimentation tank: used to store water temporarily from a aquaculture box. Generally, customers are advised to build their own and dig at the site next to the aquaculture box. The sedimentation tank is lower than the ground. It not only plays the role of precipitation filtration, but also ACTS as a buffer of water flow.
Water pump: used to pressurize the circulating water system. It is also the main operating cost source of the system.
Filtration equipment: when breeding large water bodies, microfiltration machines and other equipment can be selected as the primary filtration equipment. For example, the water body of 3000 boxes is 1-20 cubic meters, and the water in the sedimentation tank and equipment is about 25 cubic meters, which can be filtered by microfilter. If it's 1000 boxes, consider using a filter sand cylinder and bag filter to filter solid particles in water.
Thermostatic equipment: air - energy heat pump or cold water machine. One of the great advantages of air energy is to save electricity consumption, but also pay attention to the insulation effect of the plant. If the thermal insulation measures are not appropriate, heat or cold air will be easily distributed, resulting in a waste of electricity consumption.
Sterilization equipment: it is necessary to control the microbial concentration in the aquaculture water to prevent water quality changes and crabs from getting sick. In the circulating water treatment system, in order to avoid the residual ozone killing the beneficial bacteria cultured in the biofilter, the ultraviolet sterilizer is generally used as the water treatment sterilization equipment.
Biological filtration equipment: this is the core of circulating water treatment. After the organic suspended matter in the water is filtered by the filter equipment, some of the organic matter continues to decompose, resulting in the poisonous ammonia nitrogen, nitrite and other substances to crabs. These harmful substances are removed from the water by biofiltration equipment to cultivate corresponding beneficial bacteria. In order to maintain the stability of circulating water quality. But the cost of the biofiltration system is slightly higher, with many people using only a small amount of biofiltration material. As a result, ammonia nitrogen and nitrite surge in the late stage of farming. Crabs are dying in large Numbers. In addition, the growth and propagation of beneficial bacteria require stable PH value and high dissolved oxygen environment. Therefore, keeping these indicators in a stable value can ensure that the biological filtration equipment really works.
Protein separation: when breeding sea crabs, the water can be treated with a protein separator. Not only can small particles of organic matter be removed from the water, but also the water can be oxygenated.
Oxygenation equipment: including fan, air pump and other equipment. When breeding freshwater crabs such as hairy crabs, protein separators do little, and these oxygenation devices can be used to oxygenate water.
Water quality testing equipment: the basic indexes of circulating water include temperature, PH, dissolved oxygen, ammonia nitrogen, nitrite, salinity, etc. A set of accurate water quality testing equipment is necessary. "If a man will do good to his work, he will get it first."
In addition to the equipment of the box and circulating water system, factors such as feed and management are also factors that influence the success or failure of breeding. The friend that wants to raise crab with box, should consider above factor adequately, visit more, compare more, learn more. Communicate fully and adapt to local conditions. Reduce costs as much as possible and design a solution that works for you.
Recently, customers have reported that if the water level of the box effluent drops to the lowest level during the removal of hairy crabs, it is likely to cause the crabs to fail to shed their shells and die. Therefore, on the basis of the original box, we combined with many crab breeding masters, fishery experts, mechanical designers, mold makers and so on, to improve the structure of the crab breeding box in a wide range. The new crab ecological culture box has the function of water level regulation. Not only will the dirt concentrated at the bottom of the box be removed smoothly, but the water level will not be kept to a minimum. It can effectively avoid the death of hairy crabs.
The distribution of circulating water is calculated according to the local conditions of customers and the number of breeding boxes. There is no universal system. Therefore, the tailored circulating water system is the consistent style of lanling. It is not advisable to copy the rules by rote.
In addition to this ecological breeding box can raise crabs temporarily, shrimp, turtles can be raised temporarily. In the breeding process of the Australian freshwater lobster caught fire, the success rate of egg holding can be greatly improved by using the ecological incubator to breed the egg holding prawns.
I wish you all success in breeding and make a fortune!
Finally, A small question: crabs in a long-term "captive" state, will it get depression?
