What do young crabs eat? how to raise them?

Everyone has a seafood dream. It can be said that there is no one who doesn't like seafood. The common seafood ingredients in our daily life are lobster and crab. The demand for crabs in the market is increasing year by year, which makes crab farming become a new hot spot in the breeding industry. Crab breeding starts from the seedlings, so it is necessary to master the relevant breeding methods.

What do young crabs eat?

1. Natural bait

All kinds of creatures that crabs like to eat and grow naturally in water or on land are called natural baits. Natural bait mainly includes phytoplankton, aquatic plants, benthos, terrestrial animals and plants and so on.

2. Artificial animal bait

Artificial animal bait mainly includes snail, clam, clam, silkworm pupa, yellow powder worm, earthworm, small miscellaneous fish, fly maggot, livestock and poultry viscera and so on.

3. Artificial plant bait

Artificial plant food mainly includes soybeans, bean cakes, vegetable cakes, cottonseed cakes, wheat, rice bran, bean dregs, lees, sauce dregs, peanut cakes and so on.

How to raise crab seedlings

1. Understand the process of crab seedling cultivation

Before choosing and purchasing crab fry, farmers should first understand the whole production process of crab seedling farm, mainly including: parent crab specification, feed use, breeding cycle and so on. Parent crabs used to reproduce crab seedlings are best derived from natural lakes and large water bodies, and female and male crabs should come from different waters to avoid inbreeding. Parent crab specifications: each female crab should not be less than 125g, and each male crab should not be less than 150g.

2. Do a good job in quality identification of crab seedlings.

High-quality crab seedlings have strong physique, uniform specifications, phototaxis, ferocious feeding and strong traceability. The crab seedlings crawl forcefully in the hand, and the response is agile when blown with the mouth. Grab a small amount of crab fry with your hand, shake off the water and shake it into a ball, which will disperse immediately after you release your hand. Low-quality crab seedlings, empty stomach, poor swimming ability, easy to move in the bottom of the water body, hand-grasped crab seedlings are easy to form a ball, not easy to spread.

3. Reasonable culture density.

Keeping a reasonable culture density can not only give full play to the productivity of the pond, but also improve the yield, specification and economic benefit of crabs. If one-sided pursuit of production and increase of culture density, it will increase the difficulty of culture management, crab seedlings will also compete for survival space and kill each other. A large amount of residual bait and excrement produced by high-density culture will also corrupt the water quality and further reduce the living space of crab seedlings.

4. Complete detoxification

The residue of drugs such as clearing pond and killing wild miscellaneous fish, as well as the pollution of various toxins and chemical wastewater in the pond can directly affect the survival rate of crab seedlings, and in serious cases, it will cause crab seedlings to drill holes, go ashore, and even die. Therefore, complete detoxification is the top priority, it is recommended that about 7 days before the release of seedlings.

The present situation of the development of crab breeding industry

The main results are as follows: 1. River crab is the most important freshwater crab in China, which has delicate meat, delicious taste and rich nutrition. because of its strong adaptability and wide range of culture, the breeding scale has increased rapidly in recent years, which has brought good economic benefits to farmers.

2. The scale of river crab culture is relatively large, mainly concentrated in Jiangsu, Anhui, Hubei and other places, and other places are also stepping up efforts to expand the scale of river crab culture. With the rapid increase of production, the risk of river crab culture is also increasing. In recent years, the market supply and demand of river crab has fluctuated greatly, and the price has become difficult to grasp, which has brought greater losses to farmers. Therefore, it is necessary for investors to fully understand the market prospect of river crab before making investment decisions. Grasp the market trend.

What are the common breeding methods of crabs?

1. Raising crabs in the pond

The whole process of crab culture can be controlled artificially in the pond, and the recapture rate is higher, but the size and meat quality of the crab culture in the pond is inferior to that in the large water body. According to the mode of culture, it can be divided into pond monoculture, fish and crab mixed culture, and pond temporary culture.

2. Raising crabs in lakes and ditches

Crab species cultivated in natural water bodies have good environmental conditions, sufficient natural bait, low cost, large market size and good quality. But the recapture rate is low. According to the current breeding methods, it can be divided into lake, ditch crab species release and lake net crab culture.

3. Crab culture in Caodang and Lutan

Caodang and Reed beach are suitable for the ecological requirements of river crab growth, with low production cost, large listing specifications and good quality, but their recapture rate is low.

4. Raising crabs in rice fields

Raising crabs in rice fields is a new aquaculture industry developed in recent years. This method can not only reduce the application of fertilizer, kill insect pests and weeds in rice fields, but also increase the 1000-grain weight of rice, slightly improve the environment of rice fields and adapt to the growth of adult crabs.

Crab can be regarded as an omnivore, so its feed is relatively simple. There are many ways to raise crabs, several of which are introduced above, which you can refer to. But no matter which way it is, we must master the breeding density.