What do river crabs eat to grow up, and what food do crabs in the river eat

You can raise it in a basin, it doesn't matter if the water is deep or shallow, it won't drown it. However, it is better to have water freshly soaked in the shell. You can let it bask in the sun, don't bask it for too long.

You can use tap water for water, but you don't need to use it until you dry it for a day. It is also necessary to adjust the water to salt water of concentration, because it is a sea crab, so it must be raised in salt water.

Crabs are omnivorous.

You can feed them fish, whether it's raw or dried. They may also be fed fish feed, bloodworms, dried shrimp, snails, mussels. It is best to feed some grass-based foods frequently, such as bitter grass, eloso, etc.

As long as the feeding is OK, there is no need to worry about the rest, the sea crabs are very easy to raise.

Aquatic weeds and humus are the mainstays, and they also like to eat snails, mussels, worms, insects, and occasionally small fish.

Let's start with what crabs eat.

Wang Shaoxiong, Yu Zhihong.

Golden autumn crab fat. When people eat crabs with relish, if someone asks, what do crabs grow up eating? There are very few possible coulders.

A few days ago, the crab festival held in Junshan Lake in Jiangxi Province opened people's eyes, and many participants saw the bitter grass and eloza that crabs love to eat for the first time, and knew that the bait of crabs also includes snails, small shrimp and mussels. The crab festival also introduced the importance of protecting the ecological environment and preventing lake water pollution to breed high-quality crabs. Attend.

A "festival" unconsciously increased biological knowledge and improved environmental awareness. Running a "festival" has created a cultural taste.

Many "festivals" are held in various places every year, such as orange festivals, watermelon festivals, clothing festivals, shoes and hat festivals, and so on. It is an economic activity to exhibit and sell products and sign contracts between "festivals". In economic activities, cultural tastes should be improved and participants should be educated.

"There are economic benefits and social benefits, so why not?

As the saying goes: golden autumn crabs are fat, and golden autumn crabs are the most delicious.

Crabs in the river mainly eat aquatic weeds and humus. He eats animal carcasses, and also likes to eat snails, mussels, worms, and insects. Occasionally, he catches small fish and shrimp to eat, and when he is hungry, he will kill each other, and even devour his own eggs.

River crabs often burrow in the mud banks of rivers, rivers and lakes and marshes, are nocturnal, feed on fish, shrimp, animal carcasses and grains, often migrate to the estuary of the sea to spawn in autumn every year, hatch in March and May of the following year, develop into juvenile crabs, and then go up the river and continue to grow up in fresh water. River crab is a popular food because of its tender meat.

River crabs, also called "crabs" and "hairy crabs", have a square shape and a hard texture of the cephalothorax formed by the combination of head and thorax. There is a pair of eyes on the front of the body and two pairs of sharp crab teeth on the sides. The pair of appendages at the very front of the crab are called chelicerae, and the surface is covered with villi; After chelicerae there are 4 pairs of footsteps, flattened and long; The abdominal limb has degenerated.

The male and female of the river crab can be distinguished by its abdomen: the female has a round abdomen, and the male has a triangular abdomen.

When we enjoy the delicacy of crabs, we will feel very satisfied, crabs can give us a good taste experience, but also nourish the body, so sometimes when we buy crabs to cook at home, we will buy a little more, but all at once cooked and can not be eaten, overnight cooked crabs are not good for the body, so we can only raise them, so that the live crabs can be kept fresh for a few days. When raising crabs by themselves, many people don't know whether crabs need to be fed, what crabs should eat, and they are worried that crabs will die. So, how can crabs not die?

What do crabs grow up eating? 1. Crabs are omnivores, generally artificially bred are mainly humus food, and some feeders will also feed some dried fish and insects or aquatic plants. Wild crabs are equivalent to stocking, in the natural environment of the weak and the strong, they feed on the carcasses of fish and shrimp, aquatic plants, snails, etc., and they will also feed on their own kind under the liquid hopper in the case of food scarcity.

If you are raising them at home, you can feed the crabs a little sesame seeds and broken eggs, so that they can also gain weight in just a few days. 2. But mu rolling can carry bacteria Because the eating habits of crabs are very mixed, and they are mainly humus food, they will carry some bacteria and parasites in the body, so everyone should pay attention not to eat raw crabs. Aquatic products have a certain amount of histidine in their bodies, which will be used after their death.

There are many foods that crabs can eat, such as small fish and shrimp, snails, mussels, earthworms, fish and insects, etc., including the spoilage substances in the water. Crabs are omnivores and will also eat when fed rice, bread crumbs, pumpkin, corn, etc. After feeding the crabs, it is also necessary to clean up the uneaten food residues.

Crab debris late food.

There are many foods that crabs can eat, such as small fish and shrimp, snail meat, mussels, earthworms, fish and insects, etc., and it will also eat rotten leaves in the water, and all kinds of putrefactive substances.

Crabs are omnivores, they can eat almost anything, and when they are raised in captivity, they can eat rice, bread crumbs, pumpkin, corn, etc., but the nutrition is not very comprehensive.

After feeding the crab, it is best to clean up the food residue that it has not eaten in time, so as not to let it deteriorate and pollute the water quality, which will cause the crab to get sick.

Crabs grow up eating animal feed such as screws, silkworm pupa, fish, shrimp, earthworms, and animal offal.

Crabs are animals that can be farmed in captivity, and they are basically farmed in large areas when they are bred in captivity. Crabs eat animal feed such as screws, silkworm pupa, fish, shrimp, earthworms, and animal offal, and will grow relatively quickly. Because animal feed contains more nutrients, it has a more obvious effect on the growth of crabs.

When feeding, you can't just feed meat, but also some vegetarian food, otherwise they will be malnourished. Vegetarian foods that can be fed include soybeans, peanut cakes, vegetable cakes, etc. When feeding, pay attention to the combination of meat and vegetables, which can make their nutrition more balanced and more conducive to their rapid growth.

Crab farming methods

You can put the crabs in a relatively deep pot, if there are too many crabs and one pot can't fit them, you can spread them out, in order to prevent the crabs from escaping, it is best to cover the pot with a layer of gauze. Put water in the basin and the depth of the water should not be lower than that of the crab, so that its head can be exposed when it stands up, otherwise it will not be able to breathe in oxygen.

If you are worried that the crabs will escape if you use pot culture, you can use a plastic bucket to raise it, in the same way as pot culture, don't put too much water in it, and choose a bucket with a smooth inner wall. Put the crab bucket in a ventilated and cool place, the temperature is about 15 degrees is best, if you want to eat it after a day or two, then you don't need to feed it, just use water.

If you want to keep it for a longer time and don't let the crab lose weight, you can feed the crab some small shrimp or small fish or something, and add some weeds. If the crab you want to raise is a river crab, you can only raise it with clean water, and if it is a sea crab, you also need to put some salt in the water to make the water salty and closer to its growth environment.

There are also many types of crabs, and the food they eat varies greatly from crab to crab. Although there are many types of crabs, most of them are omnivores, and they eat everything.

There are more than 600 species of crabs in China, which can be roughly divided into three varieties because of their different geographical locations: first, sea crabs, which are produced in the Bohai Sea and coastal areas; the second is river crabs, which grow in inland waters such as lakes, ponds, and rice fields; The third is lake crabs. Although these three types of crabs live in very different places, their feeding habits are omnivorous.

Let me sort out the specifics of what these three types of crabs eat for a living. First of all, I will start with sea crabs, pike crabs, flower crabs, safflower crabs, stone crabs, horn-eyed sand crabs, monk crabs, king crabs, hermit crabs, coconut crabs, king crabs, etc., all of which belong to sea crabs.

Among them, coconut crabs eat almost everything, fruits, nuts, carrion, as well as newly hatched baby turtles, seabird eggs, etc. Even more exaggeratedly, in close proximity to human settlements, they even go to the fields to eat sweet potatoes and peanuts.

Sand crabs, on the other hand, feed directly on the algae attached to the sand, and in order to ingest the algae, the sand crabs will send the sea sand directly into their mouths one by one, filter out the algae, and then spit out the remaining sand.

Most of the other pike crabs also feed on small fish, shrimp, and algae plants.

Then let's talk about river crabs, yellow crabs, stream crabs, water crabs, red ground crabs, crystal crabs, etc., all of which belong to river crabs.

The main food of these river crabs is aquatic plants, food residues, plankton, animal carcasses, etc., which can be used as their food, among which plankton mainly includes algae plants, rotifers, copepods, aquatic plants generally include bitter grass, duckweed, water peanuts, etc., in addition to snails, clams, river mussels, earthworms, etc. in the water are their food.

Finally, there are lake crabs, Gucheng Lake hairy crabs, Yangcheng Lake hairy crabs, Yangtze River hairy crabs, Liangzi Lake hairy crabs, Junshan Lake hairy crabs and other hairy crabs are all lake crabs.

Lake crabs are also omnivorous crustaceans. The animal foods they eat include fish, shrimp, snails, mussels, earthworms and aquatic insects. Plant foods include duckweed, filamentous algae, bitter grass, goldfish algae, weed, Malayan eye weed, black algae, water hyacinth (water hyacinth), drought-loving lotus grass Zenshen hail (water peanut), pumpkin, etc.; Concentrate feed includes soybean cake, vegetable cake, wheat, rice, corn, etc.

Natural bait:

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

1. Phytoplankton: including diatoms, golden algae, dinoflagellates, euglena, green algae, etc., which are the feed for early juvenile crabs and zooplankton.

2. Zooplankton: rotifers, cladopods, flexopods, etc., are good feed for it.

3. Aquatic plants: including bitter grass, black algae, sagebrush, horseweed, turnip, duckweed, water lotus, water peanut, golden silk grass, etc., which are its main natural bait.

4. Benthic animals: snails, clams, river mussels, and earthworms in the water area are its best feed.

5. Terrestrial animals and plants: including mealworms, earthworms, ryegrass, wolf's tail grass, aggregate grass, etc.

Artificial animal bait:

Artificial animal bait mainly includes snails, clams, mussels, silkworm pupa, mealworms, earthworms, small trash fish, fly maggots, livestock and poultry offal, etc.

Plant-based bait:

Artificial plant-based baits mainly include soybeans, soybean cakes, vegetable cakes, cottonseed cakes, wheat, rice bran, bean dregs, distiller's grains, sauce residues, peanut cakes, etc.

In the process of breeding, we can not feed a single kind of bait, but should be fed comprehensively according to the actual situation, only in this way can we improve the breeding efficiency of crabs.