(1) Acquisition of the original species: The tabby predatory ferret does not produce dormant eggs. Because of the fierce changes in temperature and salinity resistance, it can be used as the original species when it is left in the trough in the later period of cultivation, and the climax of this species is distributed in nature. With leeches, the original species can be harvested in early summer and less frequently in other seasons.
(2) Training facilities: Tabby nymphs can swim but have the habit of crawling on the bottom of the pond and on the algae. This habit is stronger in the no-larval period and the culture facility may consider using this habit.
1 extensive culture: on the beach on the shore, use a bulldozer to open a shallow pond, you can also use the relatively easy to enter the waste salt water, a mouth of 15 acres, a shallow depth of 20 cm pool, can produce 2 billion individuals (1 ml multiplication 1 individual ), for the cultivation of 500,000 larvae.
2 Outdoor large-scale pool: The large-scale pool with a capacity of 40-200 tons and a water depth of 1.2-1.4 meters has good culture effect. In order to prevent the green algae (dendrobium, sphagnum moss, etc.) from multiplying on the pool wall, shading nets should be set along the pool walls to prevent the insects from spawning on the pool walls. Generally, 200 tons of ponds will be produced. At 3 individuals/ml, 1 kg (wet weight) of tabby ferrets are replenished daily to feed 100,000 larvae (10 mg/day for each feeding)
3 small-scale sink culture: the use of 0.5-5 tons capacity of fiberglass or poly carbonate resin sink in the indoor culture, low water temperature season to facilitate heating, can maintain a high rate of continuous cultivation. The reproduction rate is also higher than the large pool. This species does not reproduce in dark conditions, so the sink should be placed in a light or artificial light source. However, too much light may hinder breeding. To avoid the high illumination of more than 50,000 luxes in summer, shading nets should be added. There are many kinds of algae in the sink and the illumination should be appropriate.
To cultivate tabby fierce leech, no special equipment is required. To enlarge the living area, increase the cultivation density, and use its habits, consider adding a device (rock, mosquito net cloth, sieve, vinyl tape, corrugated plate, shell) to the pool. Etc.) However, sometimes the applicators can affect the distribution of the bait, impede the flow and ventilation, and the cultivation effect is not ideal. The most effective cultivation facility should be a shallow gutter.
(3) Culture: The optimum culture temperature is 23-25°C, the optimum water temperature is 25°C, and the growth rate is below 20°C. Under illuminance below 20,000 lux, except for darkness and extremely low illumination (less than 70 lux), there is no significant difference in the reproduction of tabby predator, and whether or not pool water is to be agitated by ventilation is determined according to the specific circumstances. Agitating the pool water can prevent residual bait from settling and increase the amount of dissolved oxygen. However, the tiger spot blister has the habit of living at the edge of the pool. The flow rate is too fast and sometimes the effect is not good. A small container leans on an aerated stone and slowly ventilates. It is enough to fully stir the pool water.
After larvae hatch, after 8-11 days, the survival rate is generally very high. During the cultivation process, whether the population reproduction is normal can be judged from the composition of the group's growth stage. If the larval appearance rate is more than 50%, the group may be considered as being In reproduction, if the number of larvae is small, it can be considered that the breeding density reaches the upper limit or there is a problem with water quality and food.
For tabby fierce leech, the amount of protein required for 1 individual (8 micrograms wet weight of female adult) is about 2 micrograms/day, and the amount of fresh yeast (containing 12.5% ​​crude protein) should be 4 micrograms/individual/day. 1 kilogram of squirt (wet weight) should be fed fresh yeast 240 g/kg/day. If you can not accurately grasp the amount of tiger mottler in the culture pool, you can generally according to the fresh yeast 20 g / t / day feeding, depending on food intake, appropriate addition and subtraction, in a variety of bait, cheaper and more effective culture The good is a piece of brassica. 1 kg of canola chips was put in a 1 ton resin-made water tank. 20 grams of ammonium sulfate, 4 grams of superphosphate, and a small amount of iron powder were used to fertilize the seaweed to breed. The number of individuals rose to 28,000 individuals per liter. Maintaining a high bait yield (Dendrobium) per female, at least 200 micrograms (wet weight) per day, using a mixed feed of yeast and fish feed (10 g/ton/2-3 days) In the case of mink, there are sinks such as sphagnum moss and reef algae, and the yield has increased to 16-20 million individuals/liter.
(4) Harvesting: A small tank is used for inoculation and cultivation. All the individuals cultivated in the harvesting tank can be harvested with coarse mesh (about 0.3 mm) and detailed mesh (70-90 μm). Firstly, large-scale nets were used to filter post-larvae and larvae, which were used to feed juvenile fish and shrimps. Then the larvae were removed from the nets and transferred to another pond for culture. However, when rotifers are deficient, larvae (0.1-0.3 mm in length) can completely replace rotifers as bait for juvenile fish. With the use of a large pool for continuous cultivation, a part of it is used as bait, and the extracted seawater can be sorted by the above two kinds of nets by means of siphonage, overflow method or pumping with water. The amount of intercropping should be appropriate, and the appropriate amount of intercropping will not affect reproduction. Generally, when the fertility rate is good, 8.5% will be received every day, and the number of tanks can be maintained. In the general state of proliferation, it is safer and the daily yield is about 6%. According to the experience of 200 tons of pond culture, when the density of the total number of individuals reaches 2000-3000 individuals/liter, the yield is about 1 kilogram, when 15,000 individuals/liter, 2 kilograms is received, and it can be 60 days (discontinuously) Harvesting.
(5) Feeding: Tabby fierce blister cultured with yeast, often with bacteria. Therefore, clean the seawater before feeding the fish and shrimp nursery ponds. This species is very tenacious and will be removed from the sea and will not die in the air. When measuring, it can be weighed by draining, and the number of wetted individuals per gram is estimated to be 10,000-20,000, and the number of nurseries to be put into the nursery can be calculated accordingly.
Vitamins:
Vitamin A: Retinol. Carotene compounds responsible for transmitting light sensation in the retina of the eye. Deficiency leads to night blindness.
Beta carotene: An antioxidant which protects cells against oxidation damage that can lead to cancer. Beta carotene is converted, as needed, to vitamin A. Food sources of beta carotene include vegetables such as carrots, sweet potatoes, spinach and other leafy green vegetables; and fruit such as cantaloupes and apricots. Excessive carotene in the diet can temporarily yellow the skin, a condition called carotenemia, commonly seen in infants fed largely mushed carrots.
Vitamin B1: Thiamin, acts as a coenzyme in body metabolism. Deficiency leads to beriberi, a disease of the heart and nervous system.
Vitamin B2: Riboflavin, essential for the reactions of coenzymes. Deficiency causes inflammation of the lining of the mouth and skin.
Vitamin B3: Niacin, an essential part of coenzymes of body metabolism. Deficiency causes inflammation of the skin, vagina, rectum and mouth, as well as mental slowing.
Vitamin B6: Pyridoxine, a cofactor for enzymes. Deficiency leads to inflammation of the skin and mouth, nausea, vomiting, dizziness , weakness and anemia.
Folate (folic acid): Folic acid is an important factor in nucleic acid synthesis (the genetic material). Folate deficiency leads to megaloblastic anemia.
Vitamin B12: An essential factor in nucleic acid synthesis (the genetic material of all cells). Deficiency leads to megaloblastic anemia, as can be seen in pernicious anemia.
Vitamin C: Ascorbic acid, important in the synthesis of collagen, the framework protein for tissues of the body. Deficiency leads to scurvy, characterized by fragile capillaries, poor wound healing, and bone deformity in children.
Vitamin D: A steroid vitamin which promotes absorption and metabolism of calcium and phosphorus. Under normal conditions of sunlight exposure, no dietary supplementation is necessary because sunlight promotes adequate vitamin D synthesis in the skin. Deficiency can lead to osteomalacia in adults and bone deformity (rickets) in children.
Vitamin E: Deficiency can lead to anemia.
Vitamin K: An essential factor in the formation of blood clotting factors. Deficiency can lead to abnormal bleeding.
Nutritions:
For the treatment of nutritional disease, any of the nutrient-related diseases and conditions that cause illness in humans. They may include deficiencies or excesses in the diet, obesity and eating disorders, and chronic diseases such as cardiovascular disease, hypertension, cancer, and diabetes mellitus. Nutritional diseases also include developmental abnormalities that can be prevented by diet, hereditary metabolic disorders that respond to dietary treatment, the interaction of foods and nutrients with drugs, food allergies and intolerances, and potential hazards in the food supply. All of these categories are described in this article. For a discussion of essential nutrients, dietary recommendations, and human nutritional needs and concerns throughout the life cycle, see nutrition, human.
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