Can wild crayfish be eaten? How much per catty?

On a hot summer day, we gather at a midnight snack stall to drink and chat. At this time, crayfish will be served, but most of the crayfish we eat now are farmed, so can some stores offer wild crayfish? How much is the wild crayfish on the market? The details are as follows.

A brief introduction to crayfish

Crayfish is a common freshwater crustacean in China in recent years, the scientific name of the original crayfish, also known as red crayfish or freshwater crayfish. Like other crayfish, crayfish also have crab-like chelate feet, but their chelate feet have more prominent spinous processes, and the spinous processes on the head and chest armour are particularly obvious, so they outperform many crabs in momentum. Tracing back to its hometown, in fact, in the Florida region from northern Mexico to the United States, it was sought after by foodie because of its delicious meat, and was later widely introduced to other parts of the Americas, as well as Europe and Asia. They are highly adaptable and soon take root all over the world. It is a freshwater economic shrimp, which is very popular because of its delicious meat. Because of its omnivorous, fast growth and strong adaptability, it forms an absolute competitive advantage in the local ecological environment. The range of food intake includes aquatic plants, algae, aquatic insects, animal carcasses, etc., and kill each other when food is scarce. Crayfish has become an important economically farmed species in China in recent years. In the process of commercial breeding, we should strictly prevent escape, especially into the inaccessible original ecological water body. It causes destructive harm to the ecological competitive advantage of local species.

Crayfish like gentle streams and still water habitats, swamps, ditches, bogs and ponds, especially places rich in vegetation and deciduous leaves. They hide in caves during the day, hunt for food at dusk, and start getting naughty at night-which is why lobster fishing takes place at night.

It is most suitable for them to grow when the water temperature is between 21 and 27 ℃, but they don't grow much when the temperature is below 12 ℃-which is why lobster eating takes place in summer.

Can you eat wild crayfish?

Crayfish live in polluted water, eat garbage, are rich in heavy metals, and do great harm to human health. If they eat too much, they will be poisoned by metals. Is all this true? Crayfish do adapt to all kinds of polluted environments, but that doesn't mean they like to stay in dirty places.

In fact, the crayfish can "carry" down, to benefit from its good detoxification and detoxification mechanism. In the metabolic process, crayfish can accumulate and transfer heavy metals to the shell, and then transfer toxins out of the body by constantly molting. This energy-consuming process makes crayfish less fat and more difficult to store energy to reproduce. In fact, they like clean water and fresh food best, so that they can be big and multiply. The crayfish on the market are basically big and thick.

How much is the wild crayfish per jin?

In life, people always pay more attention to wild things, and so are lobsters. Farmed ones are not as popular as wild ones, so the price is higher. Next, let's take a look at how much wild lobster is per jin and 2017 wild crayfish price. According to vendors, the purchase price of a bigger "green head" (green-shelled lobster, full of meat) is as high as 5 yuan each! You know, at the peak of lobster production, the purchase price of lobster is only 5 yuan per jin. According to the person in charge of the lobster wholesale market in Jiyukou Town, Qianjiang City, the current purchase price is 25 yuan per jin for mixed shrimp, 15 to 20 yuan per jin for less than 5 yuan, 25 yuan for 5 to 6 yuan per jin, and 28 to 30 yuan per jin for more than 6 yuan. Mainly sold to Shanghai, Nanjing, Suzhou. "in the week before this week, as the crayfish had just entered the fishing season, the quantity of crayfish was relatively small, and the purchase price was more than 30 yuan, about 10 yuan higher than the same period last year."

Crayfish market in the country in addition to Shanghai, Beijing high, other areas are generally more than 35 yuan! According to a senior person who has been in the lobster industry for more than ten years, some time ago, the wholesale price of shrimp in the Laohugou market is very unstable, and the price of 55-65 is not yet here. The prices of some well-known shrimp restaurants are about 188 yuan for 3 jin. "as the season has not arrived, lobsters are not on the market in large quantities, so the price is too high and there is no profit."

Why crayfish are popular

1. Because most crayfish are very resistant to pollution, they can still survive in water containing highly polluting toxins. Stocking in the aquarium can also effectively remove fish excreta and moss, which makes a great contribution to the regulation of the hydrological environment.

two。 The protein content in crayfish is very high, and the meat is soft and easy to digest, which is an excellent food for people who are weak and need recuperation after illness; shrimp meat is also rich in magnesium, zinc, iodine, selenium and so on. Magnesium plays an important role in regulating cardiac activity and can protect the cardiovascular system. It can reduce the content of cholesterol in the blood, prevent arteriosclerosis, and dilate the coronary artery, which is conducive to the prevention of hypertension and myocardial infarction. Crayfish contain astaxanthin, which is a powerful antioxidant. Scientists at Osaka University in Japan have found that astaxanthin can help eliminate jet lag. In addition, crayfish can also be used as medicine, which can resolve phlegm and relieve cough and promote myogenic healing of the wound after operation.

3. People in many countries in the world eat crayfish. Since 2009, the production of crayfish farming in the world has exceeded 500000 tons. The largest producer is the United States, followed by China, which is a big eater. China's output exceeded 50, 000 tons in 2003 and increased to 80, 000 tons in 2005, with an output value of more than $303 million. Crayfish exported from China are mainly cooked food, such as shrimp tail, shrimp paste, whole shrimp, spicy noodle shrimp, etc., which are mainly sold to Europe, North America, Japan, South Korea and Southeast Asia.

4. Because their meat is tight, the meat on the tail is incomparable in the eyes of diners. The protein content of crayfish is very high, accounting for about 16% of the total body weight, less than 0.2% of fat, and the meat is easy to digest. In addition, shrimp meat is rich in magnesium, zinc, iodine, selenium and other important trace elements. Crayfish shell is rich in astaxanthin. After deep processing, the extracted chitosan and astaxanthin have high economic value and are widely used in biological, pharmaceutical, food, chemical and other industrial fields.

Techniques for catching wild crayfish

I. necessary preparatory work

1. Prepare the net gear and bait

In rural areas, many people use "a 1-meter-long multi-segment grid" to catch lobsters. Every time you go to the wild to catch lobster, you can put 4-10 nets. If you put too much at a time, it is easy to lose.

The baits used are generally baits with a fishy smell, such as lobster bait sold in fishing gear stores (or Loach, Monopterus Albus bait), pig offal that begins to rot (pig lungs, tripe, etc.); root foods such as rotten potatoes and rotten sweet potatoes can also be used as bait, or dry cakes squeezed by rape can be used in the south.

2. Select the capture place

Wild lobster is widely distributed in ponds, canals and streams. Choosing a river pond close to your residence can save time and facilitate access to the net.

2. Where can wild lobsters be caught in large quantities

1. Shallow ponds

Because lobsters often live in shallow water, there are plenty of wild lobsters in shallow ponds. There are a lot of aquatic plants in these ponds, and the water quality is usually quite muddy. If the water quality in the pond is crystal clear, there will be little wild lobster in it.

2. The small river ditch near the residential area

There are also a large number of lobsters in these nearby ditches. Because urban residents sometimes pour a lot of domestic garbage and domestic waste into the river, making the small river ditch more nutritious, wild lobster can multiply in large numbers.

3. Ditches around farmland

The water quality in the farmland is very muddy, and because of frequent fertilization, the field is full of fertile water. As Monopterus Albus and voles drill holes in Tianba, the fertilizer and water in the farmland will often flow into nearby canals, and wild lobsters love the environment here very much.

Third, the method of catching lobster

1. Put in the net in the evening

It is recommended that you choose the evening (around 5pm) to the target area (ponds, canals) for the placement of nets. If it is too early, on the one hand, the lobster is not very active during the day, on the other hand, others will unintentionally (or even deliberately) take away your gear.

2. Choose shallow water and grassy areas

When netting in selected ponds and ditches, be sure to choose areas with shallow water and relatively dense weeds, because these areas are highly lobster intensive.

3. Matters needing attention in getting the network.

(1) get the network as soon as possible

When picking up the net the next day, don't get up too late. It is recommended to go at dawn, for example, around 5 o'clock. Otherwise, it would not be worthwhile to get up earlier to "take" your lobster net and "overnight results".

(2) prevent being stung when taking lobster

Wild lobsters have thick claws, which are commonly known as "big pliers", which are as fierce as crabs. So when taking off the captured lobster, you must be careful to avoid "big pliers" to avoid being stung. Hold the lobster's tentacles in your hand and lift it.

Four and three points for attention

1. Safety should be paid attention to when putting net equipment.

Especially in unfamiliar waters and ponds, there may be poisonous snakes, so be careful to wear high boots (rain boots). In addition, when casting the net, be careful not to push too hard to prevent yourself from falling into the water.

2. Make a mark

After putting in the net, remember to mark it, otherwise you can't find the specific location when you pick up the net the next day.

3. Pay attention to the weather changes

It is generally suitable for catching wild lobster in summer and autumn, and it is not suitable to cast nets when it rains heavily or thunder.