Why can t the big grass carp bought in the rural market survive in their own fish ponds?

The vitality of different fish species is different, the grass carp is larger, but the gills are not large, the head is pointed, through long-term rapid swimming in the water, increase the oxygen absorption content of the gills, the grass carp sold in the rural market, although there is a pump, but the fish density is large, the flow of water into the gills is less, the oxygen absorption is less, it is easy to lack oxygen, and the lack of oxygen leads to the adhesion of the gill filaments, and the respiratory system of the fish is damaged. In order to adapt to the new environment, the fish will produce different degrees of stress response, easy to not eat, panic swimming, in this condition is easy to get stress hemorrhage, the original transportation process bumps and bumps small injuries, the whole to the end of the whole body and gill hemorrhage, which is also the reason why the rural grass carp can not live.

The large grass carp we buy in the vegetable market, in the process of fishing, basically do not think too much about the problem of whether the grass carp is injured or not. The fishmonger weighs the pound in the fish pond, and the money is given after the scale, and there is not so much attention to the fishing process, and the one who should be thrown is thrown, as long as it is not thrown to death. Most of the grass carp that you buy back home may have already been injured, so you can't keep them in the fish pond.

For the large grass carp bought at the rural market, the merchant fills the fish pond with enough oxygen, but his own fish pond is not equipped with an oxygen device, and does not replace the oxygen with other things.

Because these large grass carp often live in the river or in the sea, they are generally very unsuitable for the life of the fish pond, and are more adapted to the relatively natural environment in the river.

Because this grass carp has been in the market for a long time, and many of the fish scales are gone, it will definitely not be able to feed in your fish pond, after all, these grass carp are live fish scales.

That's because large grass carp are not suitable for the environment in the pond at all, and they don't have enough nutrients for them to breathe.

Because the water quality is not good, it is possible that the water quality of your fish pond is not good, so the grass carp will not survive.

It can be farmed, and the lotus ponds in the countryside are very clean, and the grass carp that is farmed is also particularly clean. And it tastes very good.

Yes, because the river pond is more suitable for the growth of grass carp, the taste of grass carp raised in this way will be particularly good, the meat quality is very delicious, and it is also very nutritious.

Of course, if the water in the pond is relatively clear, the depth is sufficient, and there are enough aquatic weeds, you can breed grass carp, because grass carp is a very strong animal.

It can be farmed, and grass carp is also very suitable for raising in rural ponds, and this environment is also very suitable for the growth of grass carp.

Re-feeding can be raised, and the cost will not be high.

Grass carp is a carp of the family Cyprinidae and grass carp.

The body of grass carp is elongated, the front part is nearly cylindrical, the tail is flattened, the abdomen is round, and there is no ventral ridge. The head is broad, medium-large, and slightly flattened anteriorly. The snout is short and blunt, and the snout length is slightly larger than the diameter of the eye.

The mouth is end-positioned, the mouth is wide, and the mouth width is greater than the mouth length; maxillary slightly longer than lower jaw; The end of the maxilla extends below the nostrils. The posterior labial sulcus is interrupted and widely spaced. large in the eye, located in the anterior half of the cephalad; The interocular space is wide and slightly convex, and the distance between the eyes is about 3 times the diameter of the eye.

gill aperture broad, extending anteriorly below the posterior margin of the anterior operculum; operculum connected to the isthmus; The isthmus is wider. The scales are medium to large and round in shape. The lateral line is arcuate anteriorly, straight posteriorly, reaching the base of the caudal fin.

The outer edge of the dorsal fin is straight, above the pelvic fin, and the distance from the beginning to the base of the caudal fin is closer than to the snout. The anal fin is located posteriorly inferior to the dorsal fin, and the distance from the beginning to the base of the caudal fin is closer to the distance from the beginning of the pelvic fin, and the end of the fin does not reach the base of the caudal fin. The pectoral fin is short, the end is blunt, and the distance from the end of the fin bar to the beginning of the pelvic fin is greater than 1 2 of the pectoral fin length.

The caudal fin is shallowly forked, and the upper and lower lobes are about equal length.

Gill rakers are short and few in number. The hypopharyngeal bone is medium-wide, slightly hooked, and the hind arm is slightly larger. The hypopharyngeal teeth are flattened on the side, in the shape of a "comb", with grooves on the side, and the crown of the teeth quietly refers to the oblique surface of the cavity, with 1 narrow groove in the middle.

The swim bladder is 2-chambered, the anterior chamber is stubby, the posterior chamber is longer than the anterior chamber, and the terminal is pointed. The intestine is long, coiled many times, and its length is more than 2 times the length of the body. The peritoneum is black.

The body is brownish-yellow, the abdomen is grayish-white, the margins of the lateral scales are grayish-black, the pectoral fins and pelvic fins are grayish-yellow, and the other fins are light-colored.

Grass carp is a typical herbivorous fish, inhabiting rivers and lakes in plain areas, generally preferring to live in the middle and lower layers of water and near-shore aquatic grasses. Sexually active, swims quickly, and often forages in groups. Grass carp larvae eat larvae, algae, etc., and grass carp also eat some meat, such as earthworms, dragonflies, etc.

Wintering in the deep waters of the main stream or lake. Broodstock have retrospective habits during the reproductive season.

There is a lot of rotten grass in the pond, and grass carp can be raised if you don't get it out.

Grass carp generally prefer to inhabit the middle and lower layers of rivers, lakes and other waters, as well as near-shore aquatic grass areas. It has the habit of migrating rivers and lakes, and sexually mature individuals are in rivers and waters.

15 sheets. Grass carp making.

Spawning in reservoirs and other flowing waters, and after spawning, broodstock and juveniles enter tributaries and rivers and lakes, and usually feed and fatten in flooded shallow grasslands and flooded areas and water bodies attached to main and tributaries (lakes, small rivers, harbors and other aquatic and weedy areas). In winter, it overwinters in the deep waters of the main stream or lake. Grass carp has a lively temperament, swims quickly, often forages in groups, and is a gluttonous fish, which is a typical herbivorous fish.

When the fry stage feeds on zooplankton, and the juvenile stage also eats insects, earthworms, algae and duckweed, etc., and the body length is about 10 cm or more, it completely feeds on aquatic higher plants, especially grasses. The types of plants that grass carp feed on vary according to the food base of their living environment.

If there is a problem in management, the experience of pond farming can also be used for reservoir farming, first use the pond to save the emergency, and then find relevant reservoir books to supplement. On the basis of comprehensively summarizing the experience of high-yield aquaculture in ponds in China, the "eight-character intensive culture method" is a high-level summary of the comprehensive technical measures for adult fish breeding, that is, "water, species, bait, density, mixing, wheel, prevention, and management". Among them, "water" (water body), "species" (fish species) and "bait" (bait) are the basic conditions necessary for high-yield aquaculture of adult fish; "Dense" (reasonable dense culture), "mixed" (multi-species polyculture), and "round" (round fishing and release) reflect the stocking method of fish fingerlings, which is a technical measure for rapid fish farming and high and stable production. As for "prevention" (prevention and control of fish diseases) and "management" (careful management), they are the fundamental guarantee for high yield of adult fish.

These eight aspects restrain each other and complement each other. Its main contents are:

"Water" - requires abundant water sources, good water quality, irrigation and drainage, water quality fertilizer, cool, live, fish pond water surface, water depth in line with the specified requirements.

"species" - the requirements of the fish species are complete, the quality is good, the size is large, and the quantity is sufficient.

"Bait" – both natural and artificial – is the material basis for high adult yields. The cost of artificial feed often accounts for more than 50% of the total cost of feeding, and special attention should be paid to scientific use and reasonable feeding. Feed and fertilizer that are required to be *****, sufficient, wide and low.

"Dense" - according to the actual conditions of the pond, reasonable stocking of fish fingerlings, to make the density appropriate, make full use of water and feed.

"Mixed" - the implementation of polyculture of fish with different living habits, at least 4-5 polyculture varieties in the same pond, as many as a dozen if conditions permit, forming a cube development pattern of the waters, so that different fish habitat and complement each other.

"Round" - round capture and release, catch the big and make up for the small; Or put enough fingerlings at a time, catch the big and keep the small.

"Prevention" - based on the comprehensive prevention of fish diseases, prevention is the mainstay, prevention is more important than cure.

"Management" - the use of modern scientific fish production management methods, the implementation of fine and comprehensive scientific management.

It's just that nutrition isn't enough.

How much do you raise? For how much grass or commercial feed?

Summary. Theoretically, yes.

Theoretically, yes.

But the stakes are high.