This year, after the Spring Festival, the home began to decorate, because I am doing this industry, so I didn't invite anyone, most of the work is done by myself, after the floor is laid, there is not much sand left.
I had so much sand left that I couldn't throw it away, so I put the sand in a bucket and put it in a corner of the yard, and when I needed to use sand the day before yesterday, I found that there was a lot of water in the bucket containing sand, and it was probably raining rain.
After the rainwater was emptied, there were more than a dozen small fish, which were very small individuals, presumably newly hatched fry. The son said next to him: "Miraculously, there are more than 10 fish growing in the sand." So where do these fish come from?
The picture marked is a small fish, the video taken is blurry, not very clear, the following picture is clearer, let's see what kind of fish this is?
Judging by the body shape of the fish, it should be the larvae of crucian carp. This reminds me of a saying in the countryside called "10000 years of grass seeds, 10,000 years of fish", which means: in the long-term arid land, grass will grow after the next rain; When it rains, there is water in the pond and there is a possibility that fish may grow.
I don't know if you have noticed that the dry old river channel or dry pond, once it rains, can mainly maintain the water level, there must be a lot of fish in it, such as: crucian carp, trout, green roe, loach, yellow eel, etc., where do these fish come from?
The reason is simple, these fish are supposed to hatch from eggs, which come from river sand or the bottom of a pond. When the eggs are not hatching, the river sand is pumped out and re-hatched when exposed to water. When the eggs in the pond are not hatching, the water source dries up, and when there is a water source again, the eggs hatch again.
This again involves the question of how long the shelf life of fish eggs is, and experts on the shelf life of fish eggs have not given a reasonable explanation. But there are many examples of folklore, take the small pond in my village as an example:
My village is located in the Central Plains, when I was a child, the groundwater was very high, and there was a lot of water in the ditches, ditches, and ponds, but since 2000, with the decline of groundwater and the decrease in rainfall, there is basically a small drought every year, and a major drought every three years, and there is no water in the ditches, ditches, and ponds.
The ditches and small river ditches have long been planted by farmers, causing these ditches and small river ditches to become shallower and shallower, and have been cut off for many years, and when there is a drought, there is not a drop of water in the pond for 1-2 years, and it dries up within a few days after the rain.
After a rainstorm, some rainwater will accumulate in the pond, and the small river ditch or ditch will not store water due to the relatively high terrain, which means that the pond has long been cut off from the outside world.
But every time after a rainstorm, the pond accumulates water, as long as it can be maintained for several months. Crucian carp, trout fish, green caviar, loach, yellow eel, etc., especially crucian carp are the most.
So where do these fish come from? Crucian carp, trout and green roe should hatch because they are small, but the loaches and eels are a bit large, and they should enter the soil when the pond dries up, and emerge from the soil when there is water in the pond.
Going back to the previous article, the sand used in the renovation hatched after the water hatched, and the sand should be river sand, probably shortly after the fish spawned, and the eggs were pumped out and sold before they had time to hatch. There is a saying: "Where there is water, there are fish". Why are there fish? And how many species of fish are there? In summary, there are 6 possibilities.
1. Fish eggs develop naturally at the right time
After the eggs are mixed with the river sand and the bottom of the pond dries up, the eggs hatch into juveniles, proving that the eggs have a long shelf life, and it is possible that the eggs will go dormant in the absence of water and will develop naturally if the conditions are right.
2. The appearance of a variety of juvenile fish
After the pond dries up, after a heavy rain, the water in the pond can be maintained for a period of time, and several or more species of juvenile fish will appear, indicating that it may not be a fish egg that has the ability to dormant, and the fish have adapted to the environment in order to survive.
3. Unintentional transmission of waterfowl and other animals
Although waterfowl feed on fishing, they are also a way for fish to spread, because when waterfowl stand in the water to fish, they cannot avoid sticking fish eggs to their feet, and when waterfowl move from one surface to another to feed, they unconsciously spread fish farther away.
4. Collusion of underground rivers, rivers and ponds
In some mountainous areas, it belongs to karst landforms, this landform not only has more underground rivers, but also many surface rivers or ponds lead to underground rivers, as long as the water level is high enough, there are many fish species in the water, because the dark rivers are the same, many fish can swim freely.
5. The release of people unintentionally planted willows and willows
I remember a small reservoir on the top of a mountain in the south, this small reservoir is relatively remote, lonely in the mountains, but there are many koi fish and golden crucian carp in the small reservoir, which should be released by the release of fish.
Finally: it is not difficult to see from here that fish survive very tenaciously, even if the pond dries up, or the eggs are not suitable for hatching, the eggs will not die in a short time, they have their own way of survival, so as to ensure that they are not perishable, you say?