CATDOLL : CATDOLL: How flies reproduce

1. How do flies reproduce?

The reproduction of flies requires suitable temperature. Generally, flies will be more active in June and October because this time is very suitable for fly reproduction.

Under suitable temperature, male houseflies can reach sexual maturity and mate 18 to 24 hours after emergence and female houseflies can reach sexual maturity and mate 30 hours after emergence. Mating usually takes place between 5:00 and 7:00 in the morning. Sensitive sense of smell, sex pheromones and vision are all important factors that promote mating between male and female flies. A mating pair of houseflies can stay in one place for a long time, crawling together, flying together, and the effective mating time can be up to 1 hour. Most houseflies only mate once in their lifetime. The semen of male flies can be stored in the spermathecae of female flies for a long time, stimulating egg laying, and the eggs can be continuously fertilized for 2 to 3 weeks without mating with another male fly. This is rare in other insects. This is the important reason why flies have strong fertility.

The peak period of egg-laying is from 17:00 to 19:00 every day. The length of the pre-oviposition period of female flies (i.e. the time from emergence to the first egg-laying) is closely related to the ambient temperature: at 15°C, it takes an average of 9 days, at 35°C, it only takes 1.8 days, and it cannot lay eggs when the temperature is below 15°C. After mating, female flies often crawl into breeding crevices such as human and animal feces, extend their ovipositors and lay eggs deep in the breeding organisms to ensure that the eggs are fully protected.

Flies have amazing fertility. It has been observed that houseflies in the laboratory lay about 100 eggs per batch, and one female fly can lay 10-20 batches of eggs, with a total of 600-1000 eggs. In nature, each female fly can lay 4-6 batches of eggs in its lifetime, with an interval of 3-4 days between each batch, and each batch of about 100 eggs, with a lifetime egg production of 400-600 eggs. Even in North China, houseflies can reproduce 10-12 generations a year. According to the most conservative estimate, each female fly can produce 200 offspring, so 100 female flies only need 10 generations to reproduce a total of 200 trillion flies!

The time it takes for flies to emerge from their shells is very short, their growth cycle is relatively short, and their reproductive capacity is very strong.

2. How do mosquitoes and flies reproduce? Is it also a monogamous system?

How do flies reproduce? Male flies mate 17-24 hours after they emerge from their pupae, and female flies mate 30 hours after they emerge from their pupae. Under suitable temperature conditions, they can mate maturely. They mate for up to an hour. The mating time for flies is between 5 and 7 in the morning.

During mating, flies can fly and crawl together. Most flies only mate once in their lives. The semen of male flies can be stored in the spermatheca of female flies for a long time. The male semen will stimulate the male flies to lay eggs continuously, and the eggs will be fertilized continuously for two to three weeks. During this period, the female flies will not mate with another fly.

The peak egg-laying period for female flies is between 5pm and 7pm, and the egg-laying period is closely related to the outside temperature. Eggs cannot be laid below 15℃. After mating, female flies often crawl into cracks in human and animal feces, extend their ovipositors, and lay eggs deep inside the breeding grounds, so that the eggs are fully protected.

Within 24 hours after the mosquito emerges from its pupa, the eighth abdominal segment of the mosquito will turn 180 degrees to complete the mating posture. The mating movements also vary according to the species. The mating time of mosquitoes is usually 10 to 25 seconds. Female mosquitoes only mate once in their lifetime. After mating, the fluid secreted by the male accessory gland forms a mating plug in the female mating hole, which slowly dissolves and disappears completely in about 24 hours. The eggs laid more than 100 days after mating can be fertilized. Female mosquitoes only mate once in their lifetime, and they spend their entire lives to complete their mission of laying eggs.

Therefore, it can be seen that mosquitoes and flies are monogamous. After mating and laying eggs, they spend their entire lives breeding small flies and mosquitoes.

Mosquitoes and flies should be monogamous. Mosquitoes and flies only mate once in their lifetime, so they will only have one mate.

Flies and mosquitoes are not monogamous. How could they be monogamous when their reproductive capacity is so strong? Praying mantises are monogamous.

They are not monogamous. They will start reproducing as long as their bodies and environment are suitable, and they breed frequently.

I personally believe that mosquitoes and flies reproduce by laying eggs, they lay the eggs and then grow them themselves, and they are monogamous because of their short life cycle.

3. How do flies and mosquitoes develop from?

Flies and mosquitoes are derived from flies and mosquitoes.

Flies have the physiological characteristic of laying eggs for life after mating once. A female fly can lay eggs 5-6 times in her life, with about 100-150 eggs laid each time, and up to 300 eggs at most. It can reproduce 10-12 generations in a year.

In biology, flies are typical "complete metamorphosis insects". Their life cycle goes through four stages: egg, larva (maggot), pupa, and adult, and the morphology of each stage is completely different. The details are as follows:

1. Eggs

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The eggs are milky white, banana-shaped or oval, and about 1 mm long. There are two ridges on the back of the eggshell, and the membrane between the ridges is the thinnest. The larvae drill out from here when hatching. The development time of the egg stage is 8 to 24 hours, which is related to the ambient temperature and humidity. The eggs will not develop below 13°C, and will die below 8°C or above 42°C. Within the following range, the incubation time of the eggs shortens with the increase of temperature: 20 hours at 22°C; 16 to 18 hours at 25°C; 14 hours at 28°C; and only 8 to 10 hours at 35°C. The humidity of the growth medium also affects the hatching rate of the eggs: the hatching rate is highest when the relative humidity is 75% to 80%; the hatching rate is significantly reduced when it is below 65% or above 85%.

2. Larvae

The larvae of flies are commonly known as maggots, and there are three instars: the first instar larvae are 1 to 3 mm long and have only the posterior spiracles. After molting, they become the second instar, 3 to 5 mm long, with anterior spiracles and two lobes in the posterior spiracles. After molting again, they become the third instar, 5 to 13 mm long, with three lobes in the posterior spiracles. The body color of maggots changes from transparent and milky white to creamy yellow from the first to the third instars until they mature and pupate. The third instar larvae are long conical, with a pointed front end and a truncated rear end, without eyes or legs. The life characteristics of maggots are that they like to drill holes, are afraid of strong light, and live in the dark and dark places where they breed all day long. They are polyphagous, and all kinds of corrupt and fermented organic matter are their delicious food. The larval stage is a critical period in the life of flies. The quality of their growth and development is directly related to the individual size and reproductive efficiency of the fly.

Mosquito life cycle

Mosquitoes are insects that undergo complete metamorphosis. Their life cycle can be divided into four stages:

1. Eggs:

Mosquito eggs can be laid on the water surface, near the water or in the water, depending on the species. The eggs of Anopheles and House mosquitoes are laid on the water surface, while those of Aedes are laid near the water. Anopheles and House mosquitoes hatch in about two days, while Aedes eggs hatch in three to five days.

2. Larvae:

The larvae of mosquitoes are called mosquito larvae. They breathe through a sucking tube. They feed on organic matter and microorganisms, and the bristles in their mouths produce water flows toward their mouths. This period lasts about 10 to 14 days, and after 4 molts, they become pupae.

3. Pupa

The pupa looks like a comma from the side. It does not eat, but can swim in the water. It breathes through the first pair of respiratory horns. It matures in two days.

4. Adult

Newly born mosquitoes cannot take off (emerge) until their wings are hard. Within 24 hours after emerging, the eighth abdominal segment of male mosquitoes will all turn 180 degrees to complete the mating posture. The mating movements vary according to the species. Some will form mosquito columns in the vast fields at dusk for group dance. Mosquito columns are not necessarily formed by a single type of male mosquitoes, but are often composed of several different mosquito species. At this time, female mosquitoes see the group dance and fly close to the mosquito column to mate with male mosquitoes of the same species before leaving. Mating usually takes 10-25 seconds. Female mosquitoes only mate once in their lifetime. After mating, the fluid secreted by the male accessory gland forms a mating plug in the female mating hole, but it gradually dissolves and disappears completely after about 24 hours. They only mate once in their lifetime, and the eggs they lay in their lifetime (more than 100 days later) can still be fertilized.