Fry fry are the main planting material for pond farming. With the help of it, all reservoirs are stocked with fish - both natural and artificial.
Spawning
Spawning is a crucial time for fish. This place is always noisy, frequent splashes of water are heard. Spawning begins mainly at sunset. Continues all night, capturing the morning. In total, spawning can last 10-12 hours.
Among pond specimens, the female carp fish is very prolific. The weight of the caviar is half the weight of the female herself. Caviar light green. Quantity can vary from 342,000 to 621,000 pieces. Few survive to puberty. Lake and river fish, like sea fish, have many enemies who are not averse to eating caviar. Malek fish is a desirable prey for any predator.
Fish farming
Fish stocking has four goals:
- commercial;
- sports;
- natural;
- decorative.
Breeding fish in a pond, and after catching and selling it, is a very profitable and simple business. A real fisherman knows how to take care of fry, how to raise them, how to feed them, and so on. As a result, a large fish grows, which is sold ten times more expensive than the price.fry. Both river and sea fish are suitable for these purposes. Carp fry, for example, are bred by the owners of artificial reservoirs, while pursuing a sporting goal. After all, what fisherman doesn't want to catch a big catch? Sport fishing or hunting is an activity for real men and true anglers. Such a holiday will suit everyone.
Fish farmers pursue a natural goal. It consists in eating excess algae, destroying other fish species by predators, and improving the reservoir. And, of course, the decorative goal is pursued by the owners of large private houses who can afford a small pond, or those who decide to put an aquarium in their apartment.
Do not forget that although it is a larva, a fish fry is insatiable and agile. Therefore, growing fry of predatory fish and harmless herbivores at once, you can lose one of the species. The caviar size varies from 1.25 to 1.5 mm. The younger the female, the smaller the caviar, in older individuals it is large. This has a positive effect on the development and endurance of the future fish, which will be large and resistant to adverse environmental conditions.
Fry
At the hatching stage, the fish fry has a size of 3 to 6 mm. For the first 2 days, small fish of many species sit still, attached to aquatic vegetation with sticky glands, tail down. Nutrition comes from the yolk sac. And only on the third day, the fry of the fish switches to a mixed diet. At this time, it feeds on zooplankton and zoobenthos. As soon as the water warms up well, the fry completely switch topasture. They accumulate nutrients for the upcoming cold weather. After all, the fry will have a long and cold winter, and without a supply of nutrients they will not survive.
Underyearlings
A yearling is a fish fry up to a year old. By the end of this period, it weighs only 20-30 grams. The growth of fry is significantly affected by the food base, oxygen concentration and water temperature. On scarce feed, underyearlings poorly gain in height and weight. The same applies to the temperature regime. Both at low and high temperatures, the fry stop feeding.
How do fish behave in winter? For example, a carp fry, for example, is forced by the cold to sink into the bottom pits and stop feeding. This happens at a temperature of +7 to -8 degrees. In the future, when the temperature drops even lower, underyearlings fall into suspended animation.
In this state, any movement is reduced to a minimum. The fry do not feed and practically do not breathe. If in summer at high water temperature the fish takes about 60 breaths per minute, then in winter it is only 4-5 breaths. After wintering, the fish fry is already called a yearling, and by the end of the year - a two-year-old. Surviving another winter season, he becomes a three-year-old.
