hatchery work system is similar to stempower

baroen96(58)

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dear steemian

Today I want to discuss with a steemian friend, about the hatchery work is almost the same as steempower.

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The term hatchery is widely used in the world of animal husbandry and fishery. The free translation means hatchery. In this context, hatchery means a building used as a hatchery, from spawning to producing larvae. Hatchery buildings can be made permanently, semipermanently, or simply from the ground. [Hatchery](https://en.m.wikipedia.org/wiki/Hatchery) is crucial to the success of spawning. Therefore, for spawning to work properly, it is necessary to consider the availability of a roof or hatchery protector, the location of the hatchery, which is close to the water source, the volume of water that is always sufficient, the water condition, which is clear, free from contamination of hazardous materials, neutral pH, and high oxygen content, and a location that is not too far and easy to reach because in this stage need a very intensive control.

step one

Location Terms
The selection of milkfish hatcheries should consider aspects related to the location. Things to note in the location requirements are as follows.
Land status in relation to local regulations and clear before the hatchery is built.
Able to guarantee the availability of water and irrigation that meets the specified quality requirements;

Minimal water change; 200% per day.
Water temperature, 26,5-31,0 0 C.
PH; 6.5-8.5.
Oxygen dissolves; 3.0-8.5 ppm.
Alkalinity 50-500 ppm.
Brightness 20-40 cm (sunlight to the base of the court).
Water avoids pollution from both organic and organic pollution.

The characteristics of coastal waters in relation to the tidal and tidal currents need to be known in detail.
Biological factors such as aquatic fertility, food chain, speciesdominan, presence of predators and kompretitor, and endemic diseases should be considered because it can lead to failure of the production process.

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# Hatchery Support Facility

To maintain the smoothness and success of the hatcheries, hatchery needs to be equipped with supporting facilities, such as clean water reservoirs, pond bending, spawning ponds, egg hatcheries, reservoir and blower or aerator ponds. The existence of a pool of clean water can be considered important. Its function is to accommodate clean water as inventory if at any time needed. With the existence of this pond, the feeling of worry of lack of clean water supply can be ignored. Swimming should be made permanent with cement or concrete base material to be sturdy and not easy to leak. The size is adjusted to the resulting seed scale. As an illustration, a small-scale hatchery with seed production of about 200,000 heads requires a 2x2x1 meter container pond. To supply water, a series of paralon pipes that connect the water source to the pond must be constructed. The pipe diameter is adjusted by flowing water flow. In order to supply water to the hatchery it is necessary to create a channel of parallel pipes connected to each hatchery.
Pool bending is a pool that serves to reduce the fat content of the parent that can interfere with the process of egg spawning. In addition it can to find out the parent that really mature organs breeding or just a glut so that the stomach is bloated. During the bending process, the parent is not fed for 2-3 days. After the bend, the mains are distended because the glut will be deflated, while the mother is really ready to spawn his stomach will remain fat. The recommended pool size is between 8-12 m2 with a height of 1.5 m. To keep the parent from jumping out, the water should only be filled halfway from the height of the pond. During the dredging, keep the water flowing. Smooth aeration can be maintained by making water pipe in and out of water pipe. The entrance pipe is made of 2-inch diameter paralon, equipped with a valve to adjust the water discharge. Pipe diameter expenditure made larger that is 4 inches so that the process of draining the pond can take place quickly.
Spawning ponds are generally shaped like pools of bending, but their size is 20-24m2 wide with a height of 1.25-1.5 m. However, the spawning process is not directly done in the pond but inside the happa that is installed inside the pond. Happa is a net made of rectangular or square gauze or nylon mounted in a spawning pond. In order to maintain air aeration and water circulation in the pond, the water entering into it must be continuous. Falling water fall can be used to stir the eggs that have been removed. Eggs need to be stirred in order to mix evenly with the male parent sperm. Flowed water can be collected from clean water reservoirs prepared. To adjust the discharge can be installed water tap.
In the hatching of eggs used spawning induced breeding which means that this pond is only filled with mother fish that are ready to hatch, while the hatching of eggs is done in a special place, that is hatching the egg. The most widely known egg hatchery places are three types: funnel, aquarium and a cone.

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Hatch funnels are made of terilin fabric or other fine fabrics that are easily available in textile shops. The fabric is shaped like a cone as high as 50 cm. At the top is mounted 0.5c c of circular wire with a diameter of 40-60 cm. To hang a funnel, a wire or rope should be made at the top of the funnel. Meanwhile, at the bottom is installed a small ¼ inch hose to drain the water into the funnel. The number of funnels depends on the number of parent spawned. The aquarium that is meant here is not the usual aquarium decoration dirumaha.Namun aquarium shape design used to incubate the same eggs with an aquarium that is used to maintain ornamental fish at home. The number of aquariums used depends on the number and weight of the parent breed. For example for a mother weighing 4 kg required about 30 pieces aquarium size 60x40x40 cm or 20 pieces aquarium size 80x60x60 cm. In addition to hatching eggs, aquariums can also be used to maintain larvae.

The cone is a fiberglass tube to incubate the egg. The tube is large enough, the diameter is 150cm and the height is 120 cm. Approximately at 100 cm above, the construction of the wall is perpendicular. Conversely, at 20 cm lower, the shape of a cone. Such a form allows the water circulation to run smoothly and the spread of eggs can be evenly distributed. In order to facilitate the flow of water, the saluram in and out of the concrete need to be aligned. The incoming water comes from a holding pool connected by a 1 inch paralon pipe. To adjust the discharge the water needs to be made tap on the inlet. The incoming channel is created to dry the leads when they are finished.

Feeding and Maintenance

Dirt and excess food residue that accumulates in the bottom of the pond regularly to prevent water quality degradation. It is advisable to clean the spawning pool after spawning process is complete. This is intended to remove the remaining unhulled eggs. Dead eggs will rot and pollute the water. To reduce the incidence of parasitic infections, the sires should be bathed with fresh water for 5-7 minutes at the time the pond is cleaned.
By the age of 2-3 days or 60-72 hours after hatching, the larvae should be given rotifera (Brachionus plicatilis) as medium medium food enriched chlorella sp as food rotifera and metabolite decomposers. The density of rotifers at the beginning of 5-10 ind / ml and increased in amounts up to 15-20 ind / ml from larval age reaches 10 days. Based on the larval density of 40 head / liter, the number of chlorella: rotifer: larva = 2.500.000: 250: 1 at the beginning of maintenance or before 10 days after hatching, or = 5,000,000: 500: 1 starting day 10 after hatching. Artificial feed (artificial feed) is given when the amount of rotifera is insufficient when the larvae are older than 10 days (Appendix VIII.2). While the addition of Naupli artemia is not absolutely given depending on the availability of natural foods that exist. A good comparison between natural feed and artificial feed for 1: 1 larvae in units of particle count. The artificial feed should be sized in accordance with the mouth opening of the larvae at each age level and contain approximately 52% protein. Form. The usual commercial-made feed for shrimp larvae can be used as a feed.

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