How much is crayfish per jin now? Can dead crayfish be eaten and which aquatic plants to choose for farming crayfish

Crayfish is a relatively common type of shrimp in our country, deeply loved by people for its diverse cooking methods and high nutritional value, and currently many regions like to make it into a specialty snack, so how much is crayfish per jin? Can dead ones still be eaten? What aquatic plants to put in for good farming?

Latest market prices:

Spring and summer are exactly the season when crayfish hit the market, and prices come in all kinds. On late-night food stall menus, crayfish prices are more than ten yuan higher than last year. Last year the restaurant price for crayfish was 49 yuan per portion, while this year the cheapest is 68 yuan per portion, with a portion of about one jin, enough for two people. If there are more people or you really like spicy food, the recommended three-to-four-person portions are 88 yuan and 108 yuan per portion. At the vegetable market, crayfish prices are 30-45 yuan, and suddenly it feels like crayfish is unaffordable.

Can dead ones be eaten?

Dead crayfish cannot be eaten. Crayfish are not very clean or hygienic to begin with, with dirt, parasites and bacteria on their body surface and inside their bodies, and crayfish are a high-protein food. In the hot summer weather, this kind of high-protein food is prone to spoilage and deterioration, so dead crayfish must absolutely not be eaten.

The harms of eating dead crayfish

1. Food poisoning

Crayfish are a high-protein food. In the hot summer weather, food is prone to spoilage; high-protein food left at room temperature for two hours can begin to spoil. Crayfish contain relatively many parasites and bacteria and spoil even faster. After death, the protein in crayfish denatures, developing an off odor and toxicity, and eating them can cause food poisoning, with symptoms such as diarrhea and abdominal pain.

2. Heavy metal poisoning Crayfish contain a certain amount of heavy metals in both the environment they live in and their food. Because crayfish have a bioaccumulation effect, their heads contain relatively more heavy metals. While alive, they can suppress the spread of heavy metals; after death, the heavy metals slowly spread into the crayfish meat, and eating such crayfish increases the risk of heavy metal poisoning.

Aquatic plants that can be placed and their pros and cons:

1. Lantern grass (lunye heicao)

Pros:

1. Strong water purification ability.

2. Likes high temperatures.

3. Not prone to oxygen deprivation.

Cons:

1. The grass is tender and easily destroyed, leading to crayfish clamping and tearing large amounts of grass, and even a situation with no grass left, which is difficult to remedy.

2. Difficult to manage, requiring frequent fertilizing, grass control, and prevention of pests;

3. High requirements for water quality; once water transparency becomes low, the aquatic plant is very hard to grow and may even die;

4. High requirements for the bottom substrate; in ponds with aged substrate or thick silt, planting is difficult, and roots easily rot or do not take hold firmly, causing the plant to float up;

5. Because it grows fast and has strong nutrient uptake, it is not conducive to fertilizing the water.

2. Elodea (chibubai)

Pros:

1. Good for crayfish to attach to when molting.

2. Grows fast and grows at low temperatures, which is good for producing an early batch of shrimp.

3. It can both root and grow, and can also detach from the soil and float on the water surface to grow, with strong vitality.

4. Strong regeneration ability, not easily destroyed by crayfish, and after the high-temperature period it can quickly grow and purify the water quality.

Cons:

1. Weak water purification ability during the high-temperature period.

2. Prone to oxygen deprivation in summer and prone to rotting.

3. Hard to control the area of growth.

3. Xiaomi grass

Pros:

1. Grows fast and is easy to manage.

2. Easy to control the area of aquatic plants.

3. Higher crayfish recapture rate.

4. Good for cooling and not prone to oxygen deprivation.

Cons:

1. Crayfish cannot easily cling to it, and the shrimp raised have black undersides.

2. Low crayfish yield; spring crayfish yield is low.

Aquatic plants are closely related to the growth of crayfish, and different aquatic plants have different effects on crayfish growth. Therefore, when farmers raise crayfish, the choice of aquatic plants must also be a key consideration. The pros and cons of the common aquatic plants are analyzed above, so you can refer to them more.