CATDOLL : CATDOLL: Reasonable use of fish oxytocin?

1. How to use fish oxytocin reasonably?

The drugs currently used to induce spawning using dried fish include: the commonly used fish ovulation induction No. 2 (LHRH-A2), fish chorionic gonadotropin (polysexual hormone, HCG), chorionic gonadotropin type A, chorionic gonadotropin type B, fish ovulation induction No. 3 (LHRH-A3), diometron (DOM), fish pituitary gland (pituitary gland, PG) and a variety of complex high-efficiency oxytocin, but the most commonly used ones are fish ovulation induction No. 2 (LHRH-A2) and fish chorionic gonadotropin (polysexual hormone, HCG).

For fish with low spawning rate and low total spawning volume, such as loach, Chinese spiny target (Qingbo) and other medium and high-end fish, dioic acid (DOM) and pituitary gland (PG) should be added on the basis of using LHRH-A2+HCG, and the effect will be doubled.

For common fish, such as grass carp, silver carp, bighead carp, carp, crucian carp, etc., LHRH-A2+HCG is effective, and there is no need to add other oxytocin drugs to reduce production costs. Grass carp using LHRH-A2 alone, silver carp using chorionic gonadotropin type A alone, and bighead carp using chorionic gonadotropin type B alone are sufficient to achieve the purpose of smooth spawning. Also refer to: Rational use of fish oxytocin

2. What are the commonly used fish oxytocins?

Commonly used fish oxytocin agents include the following: 1. Oxygen: Oxygen is a hormone-based oxytocin agent, which is often used to increase the spawning rate of female fish and promote the maturation of follicles. Common oxytocin agents include synthetic GnRH (growth hormone-releasing hormone), hCG (human chorionic gonadotropin), etc. 2. Clonidine: Clonidine is an anesthetic, which is often used in the process of fish oxytocin. It can inhibit the physiological response of fish, reduce the stress response during spawning, and increase the spawning rate. 3. Ovaprim: Ovaprim is a commercial oxytocin agent made of a mixture of GnRH and hCG. It is often used in artificial breeding of marine fish and can effectively promote follicle maturation and spawning. 4. Acacetin: Acacetin is a plant extract with an oxytocin effect. It is often used in artificial breeding of freshwater fish and can increase the spawning rate of female fish and promote the maturation of follicles. It should be noted that the use of fish oxytocin agents should comply with relevant laws, regulations and technical specifications to avoid adverse effects on the environment and fish. At the same time, the use of oxytocin requires strict adherence to the instructions to ensure the effectiveness of oxytocin and the health and safety of the fish.

3. What is the basic principle of fish oxytocin?

The principle is to use a combination of physiological and ecological methods to directly inject oxytocin (PG, HCG or LRH-A, etc.) into the fish, replacing the effect of the gonadotropin secreted by the fish's own pituitary gland, or replacing the effect of the hypothalamus releasing LRH, which triggers the pituitary gland to secrete gonadotropin, thereby promoting oocyte maturation and spawning. Among fish oxytocin, the main components of the pituitary gland and HCG are FSH and LH. After entering the blood circulation of fish, they directly act on the gonads of carp, promoting gonadal maturation and spawning;

4. What is the oxytocin that cannot be used alone in fish farming?

1. How to use two types of fish oxytocin

1. Human chorionic gonadotropin (HCG) is one of the main oxytocin drugs used in artificial breeding of silver carp and bighead carp fry. The finished product is a white or light yellow powder, which is easily soluble in water and presents a colorless or light yellow clear liquid. Its aqueous solution is difficult to store and the storage time is generally less than 24 hours. It is easily ineffective when exposed to heat. Therefore, the product should be sealed and stored in a cool, dry place or refrigerator.

Usage (1) Dosage: Calculated per kilogram of broodstock, the injection amount for female fish is 800~1200 international units, and for male fish it is half. If used in combination with LRH-A, the effect is better. (2) Preparation of hormone injection: First prepare physiological saline (8 grams of sodium chloride and 1000 ml of distilled water or cold boiled water to fully dissolve). Boil the syringe and needle before use to disinfect. When using, use a syringe to draw a certain amount of physiological saline, insert the needle into the rubber stopper of the hormone bottle, inject the physiological saline, shake for 2~3 minutes, and after the hormone is fully dissolved, suck it out for use.

5. How is caulking agent used?

1. When using, stir it into a thick paste according to the water-to-material ratio. The caulking agent should be left to stand for 5-10 minutes after being evenly mixed. It is generally required to be used up within 2 hours.

2. During construction, press the stirred caulking agent into the seam along the diagonal direction of the brick surface to fill the gap, flatten and smooth it with tools, and do not use acidic cleaners when cleaning.

3. The amount of caulking agent used varies depending on the seam width and tile thickness. It can also be used in conjunction with an adhesive. Generally, each kilogram of caulking agent can be used to grout about 30 meters of seams with a seam width of 5 mm.

6. What is the difference between the refrigerant used in refrigerators and that used in air conditioners?

Common refrigerants for refrigerators include R12, R134, R600, and R152/R22 azeotropic

Common refrigerants for air conditioners include R22, and new refrigerants include R410A.

Refrigerant is also called refrigerant, and is commonly known as snow in some southern regions. It is a working substance that circulates continuously in the refrigeration system and achieves refrigeration through its own state changes. The refrigerant absorbs the heat of the cooling medium (water or air, etc.) in the evaporator and vaporizes, and transfers the heat to the surrounding air or water in the condenser to condense.

The selection of refrigerant is a relatively complex technical and economic issue. There are many factors that need to be considered. When making a selection, a comprehensive technical analysis should be conducted based on the specific circumstances.

7. What is the "catalyst" needed for information warfare?

Reference answer: (The need for military struggle) is the "catalyst" for the formation of information warfare.

8. Can deodorants used in toilets kill insects?

No, the deodorant used in the toilet can only remove the odor in the toilet, but it cannot kill insects. It is non-toxic and has no smell. Insects are not sensitive to it, so it cannot kill insects. The small insects in the toilet generally have a very strong survival rate. Only pesticides can kill these insects. You can buy pesticides in the supermarket.

9. What is the indicator used for EDTA titration of calcium ions?

Ca2+ can quantitatively form a stable complex with EDTA, which is more stable than the complex formed by calcium and calcium indicators.

In the appropriate pH range, Ca2+ first forms a complex with the calcium indicator and is then titrated with EDTA. When the quantitative point is reached, EDTA captures calcium ions from the indicator complex, causing the solution to exhibit the color of the free indicator (end point).

The calcium content can be calculated based on the consumption of EDTA.

With chrome black t as the indicator, the solution pH was controlled at 10 by an ammonia-ammonium chloride buffer solution.

10. What kind of air freshener is good for use in the toilet?

I suggest you choose Ruiwo Intelligent's products, which are very effective! Ruiwo air freshener contains "special fragrance factors" and adopts the advanced process of microemulsion encapsulation and sustained release. The particles are smaller and lighter, and can quickly dissolve in the air, diffuse naturally and stay for a long time. The ethanol components contained in it can help purify the air and kill bacteria and viruses.

And it is equipped with Ruiwo intelligent automatic fragrance sprayer, which can spray at regular time and quantitative quantity to avoid waste and overly strong fragrance.

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