CATDOLL : CATDOLL: What is the basic principle of fish oxytocin?

1. 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;

2. Reasonable use of fish oxytocin?

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

3. How to choose and use fish oxytocin?

Commonly used oxytocin hormones include: carp and crucian carp pituitary gland (PG), human chorionic gonadotropin (HCG), luteinizing hormone releasing hormone analogue (LRH-A), dioestrogen (DOM), reserpine (RES), etc.

4. 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.

5. Why do we use carp pituitary gland as fish oxytocin?

Isolation, water change, oxygenation, temperature increase by 28 degrees~

The above are all methods that can artificially induce labor~

The water you change should be exposed to the sun and have yellow medicine added~ The survival rate of tropical fish is very low when the temperature is low~ If it is a large goldfish, you can use the pituitary hormone of carp to promote~

6. What is the principle of fish antifreeze protein?

Antarctic fish can swim freely in the icy ocean below zero degrees Celsius thanks to the antifreeze glycoprotein in their blood. Bochum University in Germany published a communiqué on the 23rd saying that their latest research has revealed the antifreeze mechanism of this protein.

Researchers at the school collaborated with their American counterparts to study antifreeze glycoproteins in the blood of Antarctic cod and found that this protein can produce a hydration effect on water molecules, which can prevent liquid ice from crystallizing, and its effect is more significant at low temperatures than at room temperature.

The researchers observed the movement of antifreeze glycoproteins and water molecules. Under normal circumstances, water molecules "jump" irregularly and are unstable, but in the presence of antifreeze glycoproteins, water molecules "jump" more regularly and are stable, "like a disco turned into a minuet."

The freezing point of fish blood is generally around -0.9 degrees Celsius. However, since salt lowers the freezing point of seawater, the Antarctic seawater can be as low as -4 degrees Celsius. It is precisely because of the special function of antifreeze glycoproteins that Antarctic fish can swim in low-temperature environments.

This result was published in the latest issue of the Journal of the American Chemical Society and collected and compiled by Medical Education Network.

7. What type of fish is tilapia?

Tilapia - native to Africa, it is a tropical fish. The genus Tilapia includes more than 100 species, including subspecies. Tilapia has the characteristics of fast growth, high yield, omnivorous diet, few diseases and strong reproductive capacity.

8. What are the effects of oxytocin?

Oxytocin can help induce labor before delivery, induce labor during delivery, promote lactation after delivery, and stop bleeding. Oxytocin, also known as oxytocin, is mostly used for parturients to help them induce labor. After delivery, you should also pay attention to keeping the parturient warm and avoid catching a cold, so as to avoid postpartum diseases. You should also let the parturient rest more, which can help them recover better.

9. What is the principle of fish migration channel in hydropower station?

Fish have the natural ability to find a flow field that suits them and move around in that area. The characteristics of these fish have been studied in detail by experts, who build fishways at hydropower stations based on factors such as the flow rate of the water and the import and export habits of fish.

The fishway solves the migration problem, but because the dam proposal changes the natural environment within the dam, making the water flow slower and deeper, it is equivalent to changing the spawning grounds of fish.

In order to better enable the reproduction of fish, appropriate "hospitals" and "delivery rooms" are also needed.

10. What kind of fish is it?

Fish are the oldest vertebrates. Some hybrid offspring with different numbers of chromosomes are still fertile. They live in almost all aquatic environments on Earth, from freshwater lakes and rivers to saltwater seas and oceans. Fish are divided into two classes: jawless and jawed. The jawless class includes cyclostomes and armored fishes, while the jawed class includes placoderms, chondrichthyes, and ray-finned fishes. Most fish live in water all year round and breathe with gills and fins.