The difference between large river crucian carp and farmed crucian carp

Upstairs don't understand don't talk nonsense, the size of the big river crucian carp is generally smaller, and the intermuscular spines are more, and the farmed crucian carp are larger, and the intermuscular spines are less, the meat quality and taste of the two are basically not much different, and the slight difference is that the muscles of the farmed crucian carp are relaxed.

As for the pollution mentioned above, the only difference between the two is that aquatic samples and biological agents are regularly used for aquaculture water, and in general, the aquaculture water is cleaner than the water in the river.

The problem of feed has been around for a long time, and as for the hormone problem, it depends on the conscience of the feed mill, and it has nothing to do with breeding.

Here's how to distinguish whether a crucian carp is wild or farmed:

1. Wild crucian carp are generally white in color, and have a pale yellow color if viewed from the side in the water or facing the bright light. The farmed crucian carp is grayish-black, and the color of pure farming is even blacker.

Wild crucian carp with a whitish color and a raised back.

The wild crucian carp is slender and yellowish in color.

2. Wild crucian carp is thin in shape and relatively high on the back, the so-called high back. The farmed crucian carp is on the fat side of the body and has a large and fluffy belly.

Farmed crucian carp, black in color.

Farmed crucian carp, black in color, flat-backed.

3. There is also a kind of crucian carp farmed in large ponds or reservoirs, which is between wild and farmed. Although the color is a little whitish, the body is on the fat side and the back is smooth.

Semi-farmed crucian carp with a flat back and a fat belly.

Semi-farmed crucian carp with a flat back and a fat belly.

1. First of all, in terms of color: the color of wild crucian carp is generally white, and the color is pale yellow from the side in the bright light. Pure farmed crucian carp is dark black. There is also a semi-farmed crucian carp between farmed and wild, which is a bit whitish in color and should be black and gray.

2. And then from the point of view of body type: wild crucian carp is relatively small, with a high back and a slender body. Farmed crucian carp is relatively large, fat, and has a large and fluffy belly. Semi-farmed crucian carp are also on the large side, but they are fat and have a smooth back.

3. Secondly, from the mouth and cheeks: the mouth of wild crucian carp is white or light green, and farmed crucian carp will not have this color. The gills of wild crucian carp are fresh and light red when opened, and they are shiny.

Because the feed contains certain hormones, the gills of the fish are black and red, and the luster is dull.

4. If the appearance of the fish is still not clear to judge whether it is wild crucian carp or farmed crucian carp, then it can only be judged from the taste of the meat when eating, the taste of wild crucian carp is firm and delicate, and there is a feeling of Q bomb, while the taste of the fish of farmed crucian carp is a little soft, and it tastes a little "leaky".

Teach you how to distinguish between wild crucian carp and ordinary crucian carp, and you are no longer afraid of buying the wrong one, take a look.

First, look at the individual size of the fish. Generally, the market size of farmed crucian carp is relatively large, especially the varieties of breeding and hybridization, and the size will be relatively neat. Wild crucian carp are mostly fished or angled in large water bodies, and they are uneven in size and generally small, living only half the size of farmed crucian carp.

Secondly, look at the size of the fish. Farmed crucian carp generally have a raised back and a wide body, while wild crucian carp have a very pronounced spindle shape and a smaller head. Again, you can look at the body color of the fish.

The farmed crucian carp has a light body color, and the sides are mostly silvery-white, while the wild crucian carp has a light yellow body color and a bright body surface.

Farmed crucian carp is generally fatter, and the other can be seen in color (darker), because the body color of many fish can change with the color of the water quality. The water in the fish pond is not as good as the flowing water because of the feed and fish, and the water quality of the fish pond is black and blue

The yellow-scaled crucian carp are mostly wild, and the black-scaled and white-scaled ones are mostly farmed.

The difference between wild crucian carp and farmed crucian carp is manifested in color, shape and flexibility, among which wild crucian carp is white in color, but will appear yellow in the sun, and the back is higher and more flexible, while the color of farmed crucian carp is black, the body is hypertrophied, the belly is large and soft, and the flexibility is poor.

1. The color is different

The color of wild crucian carp is different from that of farmed crucian carp. Wild crucian carp grow in the wild and have a white body color, but when you look at the sun, you will find a pale yellow color, while farmed crucian carp have a black or yellow body color, and purebred farmed crucian carp have a pure black color.

2. Different shapes

Wild crucian carp and farmed crucian carp have different shapes. Wild crucian carp are slender but have a high raised back, while farmed crucian carp are less active and have too much food intake, resulting in an obese body with a flatter back and a large, floppy belly.

3. The flexibility is not the same as the Zen letter

Wild crucian carp and farmed crucian carp have different degrees of flexibility. Wild crucian carp grows in an environment with many natural enemies, and should always be vigilant in the process of growth, so as not to be preyed on by natural enemies, while the environment in which farmed crucian carp grows is safe, and its flexibility is reduced, so it can be easily caught.

4. Breeding methods

When cultivating crucian carp, it is necessary to use a pond with high terrain and convenient drainage and irrigation as a breeding pond, and disinfect the pond with quicklime, and then put crucian carp fry into it. In daily breeding, it is necessary to provide feed for crucian carp two to three times a day, mainly rice bran, wheat bran and other feeds, with vegetables, melon peels, fish and shrimp and other foods.

<> because domestic fish eat feed at fixed points every day and do not need to swim a lot to feed, the movement ability of domestic crucian carp will decrease, which leads to the short and thick tail of domestic crucian carp. Wild crucian carp spend a lot of time foraging every day, so the tail of wild crucian carp looks very slender.

The overall scale of the farmed crucian carp is very average, and the overall color is dark; Long-term consumption of artificial feed, fat body, thick back; Because food is easy to obtain, there is no need to swim a lot to forage, resulting in a short and thick tail, and the overall body shape is also short and fat.

In some lotus ponds or small ditches, the color of wild crucian carp will be a little darker than white, generally light yellow, because these crucian carp always like to drill into the soil, resulting in yellow scales.

There are many fishermen, in order to make the fish grow faster and better, they will increase the feed when the fish is growing rapidly, and after a long time, the belly of the domestic crucian carp will become more and more round, bigger and bigger, and if the belly has seeds, the belly will be super round.

Because of the long-term movement of wild crucian carp, the meat of wild crucian carp is particularly firm, whether it is stewed or braised for a long time, the meat is particularly tender and elastic. The domestic crucian carp has less exercise, so its fish meat is relatively loose, and this kind of fish not only has a strong fishy smell, but also has a very poor taste.

1. Pond requirements. Crucian carp breeding ponds are generally not required to be large, because the crucian carp itself is small, and the pond is too large to manage. A pond is about one acre in size, and if it is a natural lake or a large pond in the wild, it is best to divide the area.

The bottom of the pond needs to be relatively flat, so that the water depth will be more balanced, which is conducive to breeding, and the whole pond needs to be disinfected before the seedlings, and it is best to cycle several times, because the crucian carp has poor resistance to disease, and the wild limbs are idle for about a week after disinfection.

2. Water quality requirements. The water quality of crucian carp breeding sites pays attention to the characteristics of fat, live and tender, which is the most suitable water quality condition for crucian carp, and farmers need to adjust the water quality according to this condition. Fertilizer refers to fertilizing water, and if the water is not fertile, the crucian carp will not be able to live, so when breeding crucian carp, you must first fertilize the water.

Live refers to the fluidity of the water source, the crucian carp itself is relatively fast for the water source pollution, because of the growth rate, so the crucian carp breeding pond needs to change the water frequently to maintain the vitality of the water source, and it is best to keep the long-term inflow if there is a condition, and the stagnant water is left.

3. Reasonable polyculture. Now polyculture is the core of fish farming, and the final effect of a single breeding of a certain fish is not ideal, because the ecology of the breeding pond is easy to be unbalanced, and this is especially obvious in crucian carp, so when breeding crucian carp, try to polyculture the ridge. Polycultured fish should not differ too much from crucian carp, and it is better to be relatively close in size so that crucian carp are not easily threatened.

Secondly, the total proportion of polycultured fish species should not exceed 30%, too much will affect the normal growth of crucian carp.

4. Control density. The breeding density of crucian carp has always been a place that everyone pays more attention to, and there is no particularly detailed standard for this, mainly according to everyone's actual area. Generally speaking, the number of mantissa per mu is controlled at about 1300-1600, plus the polyculture of fish species, the overall number is around 2000, which is a more suitable level.

During this period, it is necessary to pay attention to the movement of the fish, if there is often a floating head, it may be due to the density and lack of oxygen.