In nature, eggs are an important source of food for the growth and development of fish, providing essential amino acids and necessary enzymes, suitable for all ages of fish. Water eggs are a cheap source of food, easy to raise, with a short rearing time, so the bobo farming model for fish has developed very strongly in aquaculture. Join us to find out egg raising technique Details in the article below. Please refer.
The average tank has a volume of about 38 liters. However, this volume is only enough to supply the needs of a normal fisherman. For commercial farming, tanks, artificial tanks (made of cement, metal, plastic or fiberglass) and earthenware must be used. In addition, any item can be reused such as an old bathtub, sink, refrigerator compartment and plastic basin. Do not use metal tubs unless they are made of stainless steel.
In large tanks, the water depth should not exceed 90 cm, 40 to 50 cm is ideal. Shallow water levels help plankton photosynthesis and better dissolved oxygen concentrations.
Incubation tanks should be placed in a place with diffused light and shade. An environment with trees and a canvas roof (50-80% reduction in light intensity) is ideal. The tank needs to be covered from rain to create stability and net to prevent predatory insects.
The tank doesn’t need to be kept very clean but certain things like filamentous algae and the larvae of predatory insects (larvae, dragonflies, bugs, etc.) can reduce boron production. The culture tank should be disinfected first by drying or bleaching with a mild acid solution of HCl with a concentration of 30%.
Water environment for bo bo to grow
Water eggs are very sensitive to chemicals and metals (such as copper, zinc are commonly found in tap water), detergents, detergents and other harmful substances in the water supply. Make sure the water tank is not contaminated with these toxins. Tap water should be aerated for at least two days to allow the chlorine to evaporate, or remove a chlorine neutralizer such as sodium thiosulfate (Na2S2O3) if you want to shorten the time. Natural water sources are ideal. Rainwater is also good for raising bo bo if it is collected from an area that is free from air pollution. Filtered water can also be used.
The ideal temperature for raising boron is between 24 and 31 degrees Celsius. They can only tolerate temperatures higher than 32 degrees Celsius for a short time. However, the low temperature slows them down.
Food for eggs
The amount of feed calculated on the culture volume was 379 liters. The amount of feed will increase from 50 to 100% after about 5 days of rearing:
+ Yeast to make bread dough: 8.5 – 14.2 grams.
+ Yeast and chemical fertilizers: 8.5 – 14.2 grams of yeast and 14.2 grams of ammonium nitrate (NH4NO3).
+ Yeast, bran and alfalfa: 8.5 grams of yeast, 42.5 grams of rice or barley bran and 42.5 grams of grass.
+ Yeast, bran and cow dung or mud: 8.5 grams of yeast, 42.5 grams of rice or barley bran and 142 grams of cow manure or mud.
+ Yeast, cottonseed and cow dung or mud: 8.5 grams of yeast, 42.5 grams of cotton or barley seeds and 142 grams of cow dung or mud.
+ Dry cow or horse manure or mud: 567 grams of dry manure or mud.
+ Dried chicken or pig manure: 170 grams of dry manure.
+ Yeast and spirulina powder: 6 grams of cake flour and 3 grams of algae powder. Feed this mixture for two days before harvesting. Note: mix warm water with yeast and algae powder and leave for about 30 minutes. Stir well and pour into the aquarium through a fine mesh strainer. The net will filter out the scum.
Organic fertilizers are often better than chemical fertilizers because they provide bacteria, fungi, organic residues and plankton that are food for the boron. There are a lot of things that can be used as food for boobies with the result that they multiply very quickly. Chemical fertilizers can also be used as food, but are best used for earthen ponds rather than tanks and artificial tanks.
Fresh manure is better because it contains more organic matter and bacteria. However, the barn should be protected from mosquitoes so that the manure does not contain larvae that affect the herd. Although not absolutely necessary, manure should be allowed to dry before use. Commercially available cow manure and dried mud can be used to feed boron.
Although cattle manure is commonly used to feed bo bo, other feeds such as yeast, alfalfa and bran are not as good but can be used. Baking powder, bran and dried alfalfa are available in grocery stores.
Raw organics such as manure, sludge, bran and vegetable oils are usually stored in mesh bags. Towels, filter cloths, nylon bags or any type of textile can be used, but nylon and synthetic bags do not rot like cloth and towels. With a small filter tank, nylon socks are very suitable, cheap and convenient to use. Use the bag to remove residue when harvesting bo bo and allow better control of feeding.
Giving too much food can make the water dirty. Regardless of the type of tank, it should be fed several times, a little at a time and then gradually increase once you have experience. If yeast is present in the tank because the water is too fertile, the organic bag should be removed. If the yeast grows too strong, it is recommended to drain the tank and start over
Too high a pH (greater than 9.5) due to moss growth and an increased concentration of toxic ammonia (undissociated) can inhibit boron growth. The pH of the culture tank should be adjusted at 7-8 with vinegar (acetic acid).
Follow up and take care
Determine the health of the boron by stirring the culture tank, scooping up a large spoon (15 ml) of water and observing it under a magnifying glass from 8X to 10X or a microscope. A blue or red-brown bob with a full belly and flexible movements is a sign of a healthy flock. Pale scorpion with an empty stomach or egg laying is a sign of poor quality environment or lack of food.
Determine the density of boron by adding 70 degrees of alcohol to a teaspoon of bath water (3 – 5 ml) to kill and then counting the number of boron on the test dish using a magnifying glass or a microscope. Harvest density contains from 45 to 47 fish in a tea spoon. By experience, boron density can be determined through observation without needing to be counted.
The density of food in the water when observed through a glass should be slightly green or light brown like tea. Clear water is a sign of lack of food. The culture tank should be fertilized with 50 – 100% of the original feed if the transparency is greater than 30-40 cm. This can be determined by a white plastic disc or metal rim 10 cm in diameter, attached to a clubhead. Transparency is the depth at which the disc remains visible when immersed in water.
If you find predators (such as water hyacinth, rice beetle, wasp or cockroach larvae, dragonfly larvae or rice beggar), it is necessary to flush the culture tank, clean and destroy them so as not to affect them. to the next crop.
We are very happy to share with you our technical experience of hatching eggs. Farmers can consider applying to create a bo bo farming model that brings high economic efficiency.