The Prevention and Control of Several Kinds of Predators in River Crab Nursery

1. Rhomboid seaweed is planktonic diatoms of planktonic diatoms. The cells are colloidally connected into a star-shaped or zigzag-like population. The shell annulus is narrow-rod shaped, 30-116 microns long and 5-6 microns wide. This algae is very widely distributed, attached to the larvae and rapidly multiplying. The sickle-like larvae, which are seriously affected by seaborne algae, must not be calm and, in addition, they cannot feed normally, resulting in a large number of deaths of larvae. There has been no ideal solution to the control of algal blooms, but precautionary measures such as the use of tightly filtered seawater, enhanced water exchange, proper light control, and warming to promote larval metamorphosis have been adopted. 2. Polychaete protozoa knocker hairs. Single-celled individuals breed many cilia and have a handle at the back of the body, which is fixed on other objects and forms a large group. Once stimulated, the whole group will contract. After the polypule is attached to the braided larvae, it rapidly reproduces in large numbers. When it is serious, it can exceed the size of the larvae by 2 to 3 times. It causes the larvae to float on the water like white floc, which seriously increases the burden on the larvae and affects the growth and development of the larvae. Caused a large number of larvae to die. In addition to polychaetes, there is sometimes a single worm that is parasitic on the larvae and the damage is very serious. Each single-celled individual has a short muscle shank, which attaches to the larvae and spreads throughout the body, making the larvae look like a layer of batting. The large population of polydenodes and drosophila is associated with too much water in the pool and bacterial growth. The use of increased pool water exchange to make the pool water clear and reduce polychesta bait can control its mass production. In addition, since the egg of brine brine is also a source of contamination of the polycystis in the breeding pool, eggs can be sterilized prior to hatching the Artemia nauplii. In the pool, 10PPm formalin killing is available for polyptera. 3, leeches are also known as water clips. They are larvae of the dragon's larvae and are harmful to the larvae of the river crabs. For the prevention and control of leeches, besides thorough disinfection of the clear pond, leeches can appear in the cultivation ponds. Sea capture, can also be used to kill kerosene. 4. In the larval rearing pool, Hua Tuo and other copepods in the larvae grow rapidly in superior water environments to form dominant populations, compete with bait-like larvae, compete for oxygen, compete for water, and disturb the larval tranquillity. Where Hua Tuo predominates in a certain cultivation pool, it is difficult for the larvae to develop to the third period. Therefore, in the cultivation pool, Hua Tuo should not be introduced into the room. The solution is to completely sanitize the ponds. When the water enters the water, the seawater is tightly filtered and prevented from entering the six limbs and oocysts. 5. The larvae of cradle larvae are worm-like and dark red in color. They are also called blood worms. Most wavy larvae crawl and flip around in the water. The body length can reach 20 to 40 mm. Winter in the winter over the sea, the life of up to one year or more. Most of the larvae are omnivorous. The carnivorous larvae are typical predators. The main foods are crustaceans, leeches, and other larvae. The amount of solar eclipse can reach 20% of the body weight. The presence of larvae poses a direct threat to the safety of zoea. For the prevention and control of the larvae, after the nursery is completed, the nursery pond is used as a fish when raising the fish, so that the bonito can swallow the larvae and achieve the purpose of killing. In the drugs in the clear pond, formalin killing effect is better, trichlorfon, bleaching powder effect is not good. 6. In the larval rearing tank, the presence of fish, shrimp, etc., will ingest large amounts of water and injure the larvae and large-eysed larvae, among which fish are particularly harmful. Its prevention and control methods, in addition to thorough clearing ponds, drug killing, can be used for flashlight irradiation capture at night.

Fried Food is one of the traditional foods in our country, whether it is fried rice, fried spring rolls, croquettes, or fried dough sticks, oil cakes, noodles, and French fries in children's favorite snacks. Fried bread, fried chicken wings, and fried potato chips and fried biscuits in snacks are all fried foods.
Deep-fried foods are popular among many adults and children because of their crispy taste, aroma, and appetite. However, frequent consumption of fried foods is extremely detrimental to health.

Fried Food

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