Muddy habits

1. Perched

Loach is a warm-water bottom fish. It mostly inhabits shallow waters such as ponds, ditches, lakes, rice fields, etc., which are still or slowly flowing. Sometimes they like to get into the mud, so the habitat is often thicker. The more suitable water environment pH is generally neutral and acidic. Muddy has a strong ability to adapt to the environment, but it can also escape to avoid adverse environments. In the early days of dryness or during periods of "dormancy" under unfavorable conditions, it will enter the mud layer. As long as the mud is slightly moist, a small amount of moisture will moisten the skin and the mud will maintain its life. Once the conditions are improved, active feeding will resume.

2. Breathe

Loach has strong tolerance to anoxia, high water is not easy to die, and water can still survive in dissolved oxygen below 0.16 mg/L. This is because loach can not only breathe with fleas but also use skin and intestines. Breathe. The loach wall is very thin, with rich vascular network, gas exchange, and assisted breathing function, so it is also called "intestinal respiration." When the dissolved oxygen in the water is insufficient, it will float to the surface to swallow the air and exchange gas in the intestines. Exhaust gas is then discharged from the anus. When artificially bred, the frequency of intestinal loaching after feeding is increased. It is said that 1/3 of the oxygen consumption of loach is obtained by intestinal respiration.

3. temperature

The water temperature in the loach growth range is 13-30°C, and the optimum water temperature is 24-27°C. When the water temperature drops to 5-lO°C or rises above 30°C, the muddy ploughs 20-30 cm below the mud layer and stops its activities to "sleep." Once the water temperature reaches the appropriate temperature, active feeding will resume.

4. feeding habits

Loach is an omnivorous fish that prefers animal feed. The different types of food intake at different stages of growth and development are different. During the juvenile stage, zooplankton in the stomach, especially copepods, are significantly more. During the adult stage, insect larvae, especially chironomid larvae, in the stomach are significantly higher than juvenile fish. The loach has a wide feeding habit. The humus, plant debris, plant seeds, eggs of aquatic animals, etc. have the highest occurrence rate, accounting for about 70% of the total amount of food in the loach, and others such as diatoms, green algae, blue-green algae, and algae, Yellow algae, protozoa, cladocera, copepods, and rotifers accounted for 30%. Artificial feeding can eat food bait.

The loach has two distinct peaks of food intake during the day and night, 7-10 and 16-18 respectively, and it is at about 5 o'clock in the morning that it is feeding low tide.

Muddy and other fish turtles often feed on the bait of other fish, which can be called a “cleaner” of the pond. Mudworms have short intestines and they digest animal feeds faster than plant foods. Muddy and greedy birds, such as feeding on animal foods, will over-exposure due to gluttony, affecting intestinal respiration, and will produce toxic gas and swell. When the water temperature is 15°C, the loach's appetite increases. When the water temperature is 24~27°C, it is most prosperous. When the water temperature is more than 30°C, the appetite decreases. During the loach's reproductive period, the appetite is larger, and the female and the male are larger than the male to meet the yolk accumulation during the reproductive period. And reproductive activity needs.

5. illumination

Muddy generally lurks in the water during the day and does not like light when it is active in the evening. Artificial breeding tends to focus on shading and darkness, or hiding in nests.

6. Grow

The speed of growth of loach is related to bait, feed density, water temperature, sex and development period, and the individual differences in artificial breeding are also significant. In natural conditions, the newly hatched seedlings grow about 0.3 centimeters in length. After one month, they reach 3 centimeters. Six months later, they can grow to 6-8 centimeters. By the end of the second year, they can grow to 13 centimeters in length, 15 About the weight of grams. The largest individual can reach 20 cm and 100 g body weight. When cultivated for about 20 days, the seedlings up to 3 cm in size can be cultivated, and when they are 1 foot, they can grow into 80 to 100 tails per kilogram.

7. Reproduction

Loach generally 1 winter sexual maturity, is a multiple sexual spawning fish. The Muddy Reproduction season in the Yangtze River Valley begins in late April and starts when the water temperature reaches 18°C. Until August, the spawning period is longer, and the rich period is from late May to late June. Every time it spawns, it usually takes 4-7 days to finish ovulation.

The amount of eggs in the loach differs depending on the size of the individual. The egg diameter is about 1 mm, swelling after water absorption reaches 1.3 mm, and generally about 8,000 eggs, only a few hundred grains are small, and many are more than 100,000 grains. 12-15 centimeters long mud loach eggs about 10,000-1.5 million; 20 centimeters long loach oolong eggs up to 24,000. The body length of 9.4 - 11.5 cm male loach contains about 600 million sperm. The male loach has matured at about 6 cm in length. Mature females often have a large proportion of female loach.

Muddy shoals are often chosen to have clear streams, such as paddy fields, pond marshes, and ditch harbors as spawning grounds: estrus often has several tailed loaches chasing a female loach, and continuously sucking and kissing female heads, chests, and finally by one. Tail scorpion squeezing around the squeezing female scorpion, the female scorpion stimulates ovulation after such stimulation, and the male squatting is discharged. This action can be repeated many times. Spawning activities are often after the rain, at night or in the wee hours. The fertilized egg has weak viscosity and yellow translucent, and can adhere to aquatic plants and stones. Generally, the seedlings are hatched after two days at a water temperature of 19-24°C.

The newly hatched seedlings are about 3.5 mm in size, and the body is transparent and has a "pocket spot" shape. They kiss the rutabaga and adhere to weeds and other objects. After about 8 hours, the pigment appeared, the body surface gradually turned black, and the silk was covered by the lid. After 3 days, the yolk sac nearly disappeared and began to ingest growth. After about 20 days, the length of the seedlings was 15 mm. At this time, the morphology was similar to that of Chengyu, and the respiratory function was changed from phlegm breathing to concurrent gastrointestinal respiration.

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