Why are earthworms afraid of water? What is a water earthworm

It's a mess, will you die if you don't breathe??

Earthworm. It is used to absorb oxygen by contact with air. It is encased in water and cannot absorb oxygen. Do you think it should be afraid of water?..Earthworms are not fish, and they do not have gills.

Used to breathe in water. When in the soil, it relies on ** to absorb a trace amount of oxygen in the soil voids. It will also occasionally drill out of the surface of the land for ventilation.

When it rains, that is, when water penetrates the soil, when the soil encounters water, the small voids in the soil are quickly filled with water, which causes the gas in the soil to be squeezed out, so that there is no oxygen in the soil to supply to the earthworms. So at this time, if the earthworm wants to continue to survive, it will instinctively leave the soil and burrow out of the ground.

Earthworms are afraid of water. Earthworms breathe through ** and are unable to breathe oxygen in the air in the water, resulting in death due to lack of oxygen. Earthworms generally prefer to live in moist, loose, organic-rich soil, especially in fertile gardens, vegetable gardens, cultivated fields, ditches, rivers, ponds, and sewers and garbage dumps near canteens.

The ** of the earthworm has a breathing function, and in the water, the earthworm cannot breathe.

Earthworms, like creatures on the mainland, are unable to breathe with their gills, and soaking in water for a long time can lead to suffocation.

It should be the habits and shortcomings of earthworms.

It belongs to the aquatic oligochaete group of annelids, the body color is bright red or flesh red, orange-yellow. They mostly live in the gutter sludge (generally in the slow-flowing black sludge) that discharges sewage or wastewater, which is dense on the surface of the sludge, fixed in the sludge at one end, and the sludge vibrates in the water at one end, and immediately retracts into the sludge when it encounters alarm.

Fresh water earthworms are bright red or dark red. Often gathered into a group. It is one of the best feeds for goldfish, and is preferred by both large and small fish.

In winter, there are very few fish and insects in the natural waters, which can make up for the lack of bait. The nutritional value is similar to that of copepods. Those who have died cannot be fed to the fish.

The nematodes are not large in size, but the population is highly productive. The difference between caudal gill worms and water silk worms is that the former has tail gills, and the tail is often exposed to mud, swinging and breathing with the water, and the flutter is accelerated when hypoxia; The latter does not have caudal gills. Nematodes like to live in the silt of organic-rich micro-mud waters (commonly known as the slow-flowing black sludge of the stinky gutter), generally lurking 10 cm to 25 cm below the mud surface, and hiding deep in the mud at low temperatures.

Red worms like darkness and photophobia, cannot be exposed to sunlight, and feed on soil to absorb organic humus, bacteria, and algae in it. The nematode is sexually mature at about 2 months, hermaphroditic, allogeneic fertilization, and the egg particles are encapsulated in a sac-like vermicoon composed of a transparent glial membrane.

Generally, a cocoon contains 1 4 eggs, and more than 7 eggs. During the reproductive period, each adult can excrete 2 6 vermicoons. When the water temperature is 22 32, the incubation period is generally 10 15 days, and the life span of artificial culture is about 3 months.

1. Water earthworm: also known as red heartworm and red nematode, it is an aquatic oligochaete among annelids, with a bright red or blue-gray body color. They mostly live in the sludge on the bank of the river basin or at the bottom of the river, dense with the sludge surface, one end is fixed in the sludge, one end stretches out the sludge to shake in the water, and when it encounters alarm, it immediately retracts into the sludge.

The nutritional value of the earthworm is extremely high, it should be rinsed repeatedly in clean water before feeding, it is the bait that goldfish and koi fish love to eat very much, and it is also the main bait for eels and young turtles. After the tide of the Huangpu River in Shanghai recedes, a large number of earthworms grow in the sludge on the bank, and people catch a large number of them in spring and autumn every year. Edible enough.

2. Nutritional value of water earthworms:

1. Earthworm reproduces quickly and has high nutritional value (dry matter contains 62% crude protein, 35% of essential amino acids, and 98% of nitrogen), which is the opening bait that many aquatic animals like to eat in the seedling stage, and is the main food for demersal fish such as sturgeon, fish danger, carp, crucian carp, loach, baby fish and yellow eel.

2. The species suitable for breeding in the water earthworm are: Su's tail gill worm and Huo's water worm. Raising earthworms can provide long-term and stable high-quality animal feed for aquaculture products, reduce breeding costs, and improve breeding efficiency and cultivation quality.

Water earthworms, also known as bloodworms and sandworms, belong to the phylum Annelid, hermaphroditic, allogeneic fertilization. Earthworms are excellent protein feeds, which contain a lot of protein, fat, sugars and minerals. Dried earthworm products, containing 62% protein and 35% of essential amino acids, have the function of attracting food because of the presence of glycotides.

Earthworms are the most ideal bait for all carnivorous fish, such as Chinese sturgeon, eel, cochineal, yellow catfish, yellow eel, catfish, carp, crucian carp, herring, turtle and turtle, etc., and are also a delicacy for various high-end ornamental fish. Using earthworms to train carnivorous fish seedlings can improve the survival rate, speed up the growth rate of fish fry, and raise adult fish, which is a pure natural green pollution-free aquaculture product, is a high-grade aquatic product on the market, and is also a high-quality product for export to earn foreign exchange.

Water earthworm: also known as red heartworm and red nematode, it is an aquatic oligochaetate among annelids.

Can disorient earthworms. Earthworms are rich in nutrition, rapid reproduction, miscellaneous diets, and high yield in artificial breeding. Good economic benefits.

Earthworms can be used as a valuable medicine** for many diseases, and can also be used as high-protein food and feed. Earthworms dig holes to loosen the soil, decompose organic matter, create good conditions for the growth and reproduction of soil microorganisms, and improve the soil, eliminate pollution, and protect the ecological environment.

Earthworms contribute to the material circulation and energy transfer of soil processes through activities such as feeding, digestion, excretion (vermicompost droppings), secretion (mucus) and burrowing, and are one of several soil invertebrate groups (mainly earthworms, mites and ants) that have an important impact on the processes that determine soil fertility, and are known as "ecosystem engineers".

Earthworms are suitable for burrowing in soils rich in humus with a certain temperature and humidity, little change in temperature difference. It is generally diurnal and nocturnal. Earthworms are hermaphroditic animals that are allogeneically fertilized.

Relying on the coordinated movement between the annular muscles, longitudinal muscles and bristles in the body wall, it feeds on organic matter such as dead branches and leaves in the soil.

Earthworms do not have a respiratory system and rely on mucus-secreting moist body walls for breathing. Earthworms have capillaries on the body wall, and the blood contains hemoglobin, which can carry oxygen. Atmospheric oxygen dissolves in the mucus of the body wall and then enters the capillaries of the earthworm body wall for gas exchange.

If the surface of the earthworm is dry, it will not be able to perform the above functions. After heavy rains, too much rain will squeeze the air out of the soil, so the burrowing earthworms are forced to crawl to the surface to breathe.