Three-dimensional high-yield aquaculture technology

Flies' ecological habits Biologically, flies are typical of 'completely metamorphic insects'. Its life spans four periods: eggs, larvae, cockroaches, and adults. The form of each period is completely different. Divide as follows:
1. Eggs are milky-white, banana-shaped or oval-shaped, about 1 mm long. The back of the egg shell has two pods, the thinnest membrane between the pods, from which the larvae are drilled. The development period of the egg period is 8 to 24 hours, which is related to the environment temperature and humidity. The egg is not developed below 13°C, and it is less than 8°C or higher than 42°C. In the following range, egg hatching time shortened with increasing temperature: 20 hours at 22°C; 16 to 18 hours at 25°C; 14 hours at 28°C; only at 35°C 8 to 10 hours. Humidity of the growth substrate also affects the hatchability of the eggs: the highest hatching rate is obtained when the relative humidity is 75% to 80%, and the hatching rate is significantly reduced when the relative humidity is lower than 65% or higher than 85%.
2. The larvae of the larvae's flies are commonly called fly maggots. There are three instars: 1 instar larvae are 1 to 3 mm in length and only have rear valves. After the molting, it becomes 2 years old, 3 to 5 mm long, and has an anterior valve, and the posterior valve has 2 cracks. Once again, the skin is 3 years old, 5-13 mm long, and the rear valve is 3 cracked. Muscae body color, 1 to 3 years from transparent, milky white to milky yellow, until mature, phlegm. The 3rd instar larvae have a long conical shape with a pointed tip and a cut-back at the posterior end with no eyes or feet. The life characteristics of fly maggots are like drilling, fear of glare, and hiding in darkness all day long. It is a multi-food, all kinds of corruption fermented organic matter, are its delicious food. The larval stage is a crucial period in the life of a fly. Its growth and development are directly related to the individual size and reproductive efficiency of the flies.
The main factors affecting the growth and development of fly larvae are as follows:
1 Temperature: Its level is directly related to the length of development of fly maggots. The optimum environment temperature (medium material temperature) is 34 to 40°C, the development period can be shortened to 3 to 3.5 days; when the temperature is 25 to 30°C, the development period is 4 to 6 days; when the temperature is 20 to 25°C, the development period It is 5 to 9 days; at a temperature of 16°C, the development period is as long as 17 to 19 days. The lowest temperature during development is 8-12°C, but it is higher than 48°C.
2 Humidity: The suitable environmental humidity for the 1 to 2 instar fly larvae is 61% to 80%, and the optimal humidity is 71% to 80%. The suitable ambient humidity for the 3rd instar fly larvae is 61% to 70%, more than 80% will not develop normally. It can be seen that the development of fly larvae requires a certain amount of humidity, but it is not as high as possible. In the production practice, the suitable humidity is 65%-70%; below 40%, the development of the fly maggots is stagnant, the phlegm is very few, and even the fly larvae die.
3 Food: One of the important ecosystems of fly maggots is eating habits, and they feed locally on the ground. Some people have found up to 76,400 fly maggots and clams in 1.5 square meters of pig manure! Animal feeds, vegetable feeds, and even proteins in microorganisms are nutrients that fly lice prefer to ingest. Food quantity, quality, fermentation temperature and even water content are directly related to the developmental effects of fly maggots. After 3rd instar larvae matured, they stopped feeding. At low temperatures of 15 to 20°C and low humidity, they often left the breeding site and drilled to the nearby soil to loosen and phlegm. Some people have found tens of thousands of housefly fleas in the cracks on the concrete floor of a winery.
4 ventilation: air circulation is conducive to the growth and development of fly maggots. In the rubbish dump, the fly maggots are often distributed in the corners and wall roots with large gaps.
Mastering the growth characteristics of the above-mentioned fly maggots, which are used to guide the actual production, is of great benefit to improving the breeding efficiency of fly maggots.
3. Flea is the third metamorphosis in the history of flies. It is a barrel or a cofferdam. Its body color fades from dark to light, eventually turning to chestnut brown, 5 to 8 mm long. The metamorphosis continues within the oyster shell. Once the flies have formed, they enter the eclosion stage. During eclosion, the frontal pockets of the flies* alternately expand and contract, pushing the head of the oyster shell out of the oyster shell and crawling out through the loose sand or other culture material to reach the surface. From phlegm to eclosion, it is called flood season.
The external factors that affect the growth and development of alfalfa are:
1 Temperature: After the 3rd instar flies, it tends to phlegm in a slightly cold environment. However, if the temperature is lower than 12°C, the carp ceases to develop; if it is higher than 45°C, it will die. In a suitable range, the puerperal period shortens as the temperature increases. At 16°C, it takes 17 to 19 days; at 20°C, it takes 10 to 11 days; at 25°C, it takes 6 to 7 days; at 30°C, it takes 4 to 5 days; at 35°C, it only takes 3 to 4 Days, this is the best development temperature. The characteristics of wolfberry are relatively hardy. According to tests, housefly larvae returned to normal room temperature after being refrigerated in a refrigerator at a temperature of 1°C and an ambient humidity of 85% for 4 days, and the eclosion period was only delayed by 1 day compared with the normal pupa period. Refrigerating in the above environment for 3 days did not reduce its emergence. rate.
2 Humidity: According to the test, the optimum moisture content of the culture material suitable for earthworm development is 45% to 55%, higher than 70% or lower than 15%, all of which will obviously affect the normal emergence of earthworms. If maggots are soaked in water, the longer the time, the lower the rate of maggot larvae and pupa, and the lower the eclosion rate of maggots. Some people once collected 1,000 fly maggots from liquid waste and transferred them to a dry environment. As a result, one of them failed to be adultated.
It is worth mentioning that if we train maggots with insufficient nutrients, the maggots can strengthen crickets when they are not fully developed. The crickets can also hatch into adult flies, but more than 95% of the adults are hatched. Males only eat food without laying eggs and all die in a week or so. Therefore, the fly maggots used to keep larvae must be fed with sufficient nutrients to make them fat and fat. The proportion of females is greater. Only females have more breeding flies, spawning capacity will be guaranteed, and yield will be stable.
4. Adult flies Adult flies that emerge from cockroaches need to undergo several stages of "resting - crawling - extensible - wings spread - body wall hardening" before they can develop into adult flies with flying, feeding, and reproduction capabilities. The housefly that had just emerged from the pupa was soft and light gray, with its wings unfolded and the frontal sac did not retract. Later two wings spread, the epidermis hardens and the color deepens. After 1 to 1.5 hours, both wings can fly. At 27°C, flies begin to move and feed only 2 to 24 hours after emergence. Its ecological habits are as follows.
(1) Diet and lifespan The feedability of flies depends on their species. There are specialized nectar and plant sap, and they are specialized in eating humans, animal blood or animal wounds, blood and eye and nose secretions. The common housefly, big-headed fly, green-fly, fly-fly, and flies fly belong to omnivorous flies, that is, food, animal and poultry secretions and excreta, kitchen waste, and organic matter in the garbage. They have a strong tendency towards sugar, vinegar, ammonia, and odor. According to research, if the female flies simply supply water, sugar and carbohydrates, although they can grow, but the ovary can not develop, lay eggs; only fed protein feed or a variety of amino acids in order to lay eggs. If female royal fly is fed with royal jelly, the period before spawning can be shortened and the amount of eggs laid can be increased.
Factors that affect the lifespan of flies are temperature, humidity, food and water. Temperature 25 °C ~ 33 °C, air humidity 60% ~ 70 best.
Female flies live longer than male flies and have a life span of 30 to 60 days; in laboratory conditions, they can last up to 112 days. At low temperatures in the winter, flies can live for half a year.
The flies' resilience is very strong. The flies can be roughly classified into human feces, animal feces, corrupt animals, corrupt plants, garbage, and sewage. The fly larvae have a strong adaptability, and almost all of the above six types can breed. Especially, they love to live in livestock manure and fermented plants, and secondly they like to breed in human feces and spoiled animals.
(2) Activities and inhabiting flies are insects that are frequently active in daylight and have obvious phototaxis. Stay still at night. Activities and habitats depend on species, season, temperature, and area. In some seasons, fly fleas, summer flies, and city flies can invade homes. Large-headed flies, silk flies, flies, flies, and flies are mainly active and inhabit outdoors.
The activity of flies is greatly affected by temperature. It can only crawl at 4 to 7°C, fly at 10 to 15°C, feed, mating, and lay eggs at 20°C or more, is especially active at 30 to 35°C, and stops at 35 to 40°C due to overheating, 45 to 45°C. Death at 47 °C.
Flies are good at flying. The speed of flight can reach 6-8 kilometers per hour and the maximum flight is 8-18 kilometers per day and night. However, most of them are active within a radius of 100-200 meters in the breeding area, and most of them do not exceed 1-2 kilometers.
The fly wintering method is quite complicated. It can both survive winters in a paralyzed state and overwinter in fly larvae and adults. In the cold regions of the north and temperate regions, the active housefly is not visible in nature, but there are still adult flies in artificially heated rooms. Vegetable greenhouse greenhouses often become the birthplace of large numbers of flies in the spring of the following spring. In Jiangnan and some parts of North China, the winter average temperature is below 0°C. Flies can subtly fly through the winter. In a few areas, fly maggots covered by livestock manure can also be found in crouching females. In the subtropical regions of South China, the average temperature is above 5°C, and flies do not have a dormant state and can continue breeding.
(3) Male and female respectively 1. From their individual perspectives: Individuals in a group are generally males, individuals are generally males and females, and 2. Their stomachs are male and female, respectively: Male flies have a small, flat belly, and female flies have a large belly. And the circle; 3. Look at their ass-female: The butt of the male fly is round, and the ass of the female fly is pointed.
(4) Mating and breeding At a suitable temperature, the male housefly is sexually mature and mated after 18 to 24 hours after emergence, and 30 hours after emergence of the female house fly. Mating time is generally between 5:00 and 7:00 in the early morning. Sensitive sense of smell, sex hormones and vision are all important factors in promoting the mating of male and female flies. A pair of mating house flies can stay in one place, crawl together, fly in pairs, and effectively mate for up to 1 hour. Most houseflies only mate once in their lifetime. The sperm of the male flies can be stored in the fertilization sac of the female flies for a long time, stimulate spawning, and continue to fertilize the fly eggs for 2 to 3 weeks without having to mate with another male. This is rare in other insects. This is an important reason for the vigorous breeding of flies.
Spawning peaks every day from 17:00 to 19:00. The length of the female's early spawning period (ie, the time from eclosion to first oviposition) is closely related to the ambient temperature: an average of 9 days at 15°C, 1.8 days at 35°C, and no production at 15°C or below. egg. After mating, the female flies often climbs into crevices such as human and animal feces, and sticks out of the oviposition tube to spawn in the depth of the vegetation so that the eggs can be fully protected.
Flies have amazing fertility. According to observations, the housefly in the laboratory produces about 100 eggs per batch, and one female flies can finally spawn 10-20 batches, and the total egg production amount reaches 600-1000 grains. In nature, each female flies can spawn 4 to 6 batches in their lifetime. Each batch is separated by 3 to 4 days. Each batch of eggs produces about 100 eggs, and the final production of eggs ranges from 400 to 600 grains. Even in North China, Musca domestica can breed 10 to 12 generations a year. According to the most conservative estimate, each female flies can produce 200 offspring, then 100 females only need to pass 10 generations, and the total number of flies propagated. Will reach 2 trillion billion!
(5) Although the natural enemy flies have strong fertility and the family is prosperous, 50% to 60% of descendants are dying because of natural enemies and other disasters. The natural enemies of flies have three types: First, predatory natural enemies, including frogs, crickets, spiders, cockroaches, ants, lizards, geckos, insectivores, and birds. Chicken manure is a nematode of houseflies and flies, but there are often giant scorpions and cockroaches, which are ferocious, and prey on fly eggs and fly maggots in feces. The second is parasitic natural enemies, such as wasps, wasps and other parasitic bees, they are often eggs produced in the fly or maggots, larvae hatched after eating maggots and fly maggots. It was found that 60.4% of parasites excavated in the spring were killed by parasitoids. The third is the natural enemies of microorganisms. Japanese scholars have found that B. cereus can suppress flies, and Chinese scholars have also found that the spores of “Drosophila drosophila” fall on flies, causing flies to infect single-worm mycosis. All these things deserve the attention of fly maggot farmers.
Production steps Production steps: Select site → Building aquaculture → Fermented manure → Introduce or domesticate flies → Cycling production.
Steps: Fermenting of manure → Feeding into flyhouses → Stacking into strips → Putting on egg-laying → Covering egg after spawning → Water conservation and heat preservation → Automated separation → Reclamation → Comprehensive utilization → Scoop out residual manure → Repeated cycle production.

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