Phi shrimp breeding techniques
For broodstock selection, transportation and holding of broodstock, artificial breeding or mated prawn eggs in natural sea areas can be selected. Although the body length can grow more than 8cm, it is improved to ensure the quality.
The amount of eggs should be selected to be llcm or more in body length and 30g or more in body weight. In addition to the acquisition of broodstock, it is important to note that the time for the shrimp to leave the water is short, and the gonad development process
Good degree, strong body, complete appendages, no scars, strong vitality, bright color, sensitive to external stimuli. After the acquisition of the broodstock, it should be shipped to Yuyu as soon as possible
The seedling plant is put into the pond for raising. Transportation methods include live water boat transportation, nylon bag oxygenation transport, dry moisturizing transport and canvas bucket water transport. Broodstock
蛄 First, after passing through a 200xlo-6 formaldehyde bath for 3 minutes, select a cement bath (9mx4mx1.2m) that has been fitted with a full complement and lively disinfection.
The filtered fresh seawater is inflated and rejuvenated and raised. It is advisable to use 1-2 °C higher than the sea area for the 1-3 days before the water temperature in the broodstock larvae.
The temperature of the water is raised too quickly and it is easy for the squid to have a premature or miscarriage. After raising temperature to 21-22°C at a rate of 0.5-1.0°C/day for 20-30 days,
Feed a small amount of fresh silkworms, shrimps, variegated meat, etc. to further fatten the gonads. Although the shrimps basically stopped feeding during the reproductive season, almost
The stomach is empty, but when the temperature of 22 °C gonadal coefficient up to 14%, the eggs in the output of the egg group is clear, basically grouped, that is, mature eggs.
Incubating broodstock and brooding broodstock cultivating refers to mating female ovaries that have been mated and have matured ovaries, or female flukes that are ovaries that are developed but not mature,
Into a special breeding pond feeding, so that gonads mature, spawning, hatching eggs hatch until the incubation of false larvae hatching process. It promotes cultivating and holding eggs
The hatching is carried out in a cultivation pond, which has a suitable environmental condition of the shrimp, thereby promoting the ripening effect, holding the eggs, and the hatching rate is also high. Broodstock
The purpose of education is to make the ovary development of the shrimp larvae basically synchronized, and spawning and larvae are discharged in order to obtain a large number of false larvae to form a certain production.
scale. There are two breeding ponds for broodstock, one is an indoor pool and the other is an outdoor pool. The indoor pool is generally a concrete pool and the outdoor pool is an earth pool. Broodstock
Education should pay special attention to water quality management, food management and daily management.
1, water quality management Water to maintain dissolved oxygen in more than 5ml/L, daily change of water 1/4 - 1/3, transparency in 30-50cm. Shrimp is a fierce crustacean whose temperature changes, and its growth
Development and life activities are directly affected by the ambient water temperature. The water temperature in the living area is approximately 6-31°C, and the optimum temperature is 20-27°C. It belongs to wide-temperature species.
class. Under laboratory conditions, the prawn was transferred from seawater at 7°C directly into seawater at 5°C. The body immediately bowed and slowly stunned. Move it into the 33°C sea
In the water, the shrimp squid squatted up and down, and then fell sideways at the bottom. Only the swimmer's limbs could swing and stun in 3 minutes. So think it's temperature range is 5 -
33 °C. When the water temperature changes, the temperature range will increase. When raising broodstock, special attention should be paid to the temperature difference. Generally, when cultivating, the water temperature is controlled
20-30 °C. Water temperature is an inhibitory factor for the development of gonadal gonads. Within a suitable temperature range, the higher the water temperature, the faster the development. If the summer temperature is too high, increase the water
In order to prevent the temperature of the water from being too high and affecting the brooding, hatching, hatching, and even death of the broodstock. At a water temperature of 25-30°C, eggs need to be fertilized until they hatch.
15 days.
2. The feed management shrimp can feed on fish, shrimp and shellfish, but it is better to use fresh small shellfish to avoid polluting the water. The bait is good for small pieces and should be evenly cast
In order to ingest food, wells can increase their consumption of food and reduce their mutual killing due to catching food. According to the characteristics of the prawn's nocturnal feeding, it is possible to feed once a day in the evening.
The amount of feed is 5%-20% of the weight of the broodstock, and it will increase or decrease as the broodstock grows, the temperature of the water, the weather, the type and quality of the feed, etc.
. In the early period of cultivation, the amount of bait may be appropriately increased to provide sufficient nutritional requirements for gonad development. When the broodstock pecks its eggs and drills, it does not eat, so it is estimated that
When most brooders hold eggs, it is advisable to reduce the amount of feeding. In addition, when the broodstock are incubated, they grow into large amounts of food and interfere with other spawning shrimps.
It is best to use a cage net to trap the pool.
3. During the day-to-day management and cultivation, the patrol pond is a necessary task to check the water intake and drainage conditions, shrimp feeding activities and feeding conditions, and water quality, especially the discharge of larvae.
. Once the larval larvae were found to be discharged from the broodstock, the larvae were brought into nursery ponds for nursery.
The spawning and breeding of broodstock, spawning and hatching shrimps require strict environmental conditions, especially for sediments, caves and light, and do not lay eggs without proper conditions, or even spawn.
Not hatching either. Therefore, put the soft mud (20-30cm thick) collected from the intertidal zone at the bottom of the glass fiber cylinder (diameter 2mx1.0), flatten it, and add sea water to it.
30cm mud surface, soaked with sodium hypochlorite for 24 hours to disinfect, and then neutralization, washing, and make the seawater pH value of the cylinder consistent with the filtered seawater, and then covered with black cloth cover
use.
Select 16 large-scale, lively, and fully attached broodstock (with a sex gonad coefficient of 15% or more) in individuals with well-developed gonads, and place them after formaldehyde sterilization.
Into the above incubation tank. Shrimp larvae are very capable of excavating caves. As long as the substrate and environmental conditions are suitable, sexually mature broodstock can be completed within a short period of time.
The "u"-shaped cave is created, and it is a large, small, two-mouthed, large-mouthed diameter of 5-7cm and a small-mouth diameter of about 2cm. When the water temperature is raised to 24-25°C, the pro
Shrimp clams begin spawning eggs in the cave.
The egg masses produced by the shrimp larvae are yellow and between 1.5 and 3.0 cm in diameter. The mature egg cells are round, about 410-450um in diameter, and they are finished at one time.
And hold it on the mouth and keep rotating, as long as the egg group is not broken or from outside stimulation will hold, ranging from hours to days. If there is
External stimuli, such as strong light, rapid water, and large water temperature, will quickly throw away the egg mass. The cleavage of the fertilized eggs of the shrimp larvae is surface cleft, at 26-28 °C.
Under water temperature conditions, after about 20 days of incubation, the water was incubated until the larvae of the larvae (ie, shrimp larvae). During this period the water flow should be controlled to
It is not advisable to mix the tanks properly. The outlet water and inlet water should be equal, and the 100-mesh sieve should be used to change the water. The dissolved oxygen content in the cylinder should be greater than 5mg/L. Spawning, hatching to young
The worms are all completed in the cave and the mother. When the larvae leave the cave and the mother and swim in the water, they are abnormal larvae. Shrimp larvae
Metamorphosis to young shrimp requires 3-4 months. The larvae should be separated from the original culture tank.
The larvae were cultured from the phase I larvae into the pool to the prawns larvae out of the larvae. Seedling seawater needs precipitation and sand filtration to prevent heavy metals
The ion content is too high, can add EDTA sodium salt 2-5mg/L. Changing water is an important measure to ensure good water quality. The newly hatched larvae were siphoned from
The original incubation cylinder was separated and moved to another tank with mud bottom to continue cultivation. The water temperature was controlled at 26-28°C. 4 times a day in a mixture of single cell algae (P. tricornutum,
Artemisia and Chlorella, etc.), rotifers, and Artemia nauplii, with densities of (5-10) 104 cells/ml, 10 cells/ml, and 5 cells/ml, respectively.
Water 2 times, about 1/3 volume each time. Cover the cylinder surface with a black cloth. Then, in a 2m2m1.2m concrete tank, the bottom is covered with 10cm thick clay mud.
After sterilizing, the larvae that have been cultured in the tank for 22 days are moved in. Due to the small size of glass fiber cylinders and the high density of larvae, the water temperature drops too quickly.
After changing the pool, the water temperature should be gradually reduced to natural water temperature at a rate of 0.5-1.0°C/day. In the early stage, 5 wh/ml of Artemia rotifers and Artemia nauplii 5 wh/ml were mainly fed.
, Auxiliary vote a small amount of egg tarts, need to change the water volume of 1/3 a day, the amount of inflatable. Later, with the development of larvae, artemia fed on Artemia, shrimp, and clams
Fish artificially combined with bait. Shrimp pudding is a popular seafood dish, but its seedling technology is still in the experimental stage and there are still many technical problems.
Not widely promoted for farming. This requires scientists and technicians to continue their efforts to make breakthroughs in the artificial reproduction and breeding techniques of Shrimp Shrimp to meet the needs of the general public.
The needs of the people are at the same time creating greater economic value.
Pumpkin Kernel,Kernel Pumpkin Seed,Squash Seed Kernels,Roasted Pumpkin Seed Kernels
Wuyuan county dafeng oil food co.,ltd , https://www.dafengfood.com.cn