gonad Learn more about gonad
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How do scallops reproduce?
How do scallops reproduce? Scallop is actually a male and female community. Its growth and development is very fast, it begins to cultivate seedlings in spring every year, and the gonads of scallop can mature in autumn, which can be used as parent scallop to collect eggs and cultivate seedlings. The gonad of the scallop is in the abdomen, and the testis is located in the
2020-11-11 Scallop how really male and female -
Artificial ovulation induction technique of barracuda
(1) the basic principle of artificially induced ovulation is also called induced labor. Commonly known as aphrodisiac, green, and so on. The artificial method is to inject drugs into the mature gonadal parent fish to stimulate the gonads to further mature and discharge, so as to obtain mature eggs (or male fish sperm). Accurate grasp of the spawning season, selection of parent fish suitable for spawning, and the use of effective dose injection in the appropriate temperature range is a necessary condition for artificial spawning. Whether the spawning technique is appropriate or not affects the fertilization rate and hatching rate of fish eggs as well as the yield of parent fish and postpartum.
2019-01-16 -
Key points of breeding parent fish in spring during gonadal development period from March to April
Key points of breeding parent fish in spring during gonadal development period from March to April
2018-07-10 -
Parent fish cultivation techniques of four major domestic fish in spring
Spring is an important period for gonadal maturation of parent fish. From the beginning of spring to spawning, a large amount of nutrients in parent fish are transferred to gonadal development, so the cultivation of parent fish should be strengthened in spring to meet the needs of gonadal development and promote timely maturation and smooth spawning. The cultivation techniques are as follows: 1. Divide the pond ahead of time. Adjusting stocking density and breed matching is the first condition to cultivate good parent fish. The area of the pond separated by the parent fish should be 2000 square meters and 2600 square meters. Drain the pond water before dividing the pond to remove wild miscellaneous fish, clams and enemy pests, and at the same time remove some of the pollution.
2019-01-11 -
Inducement of sexual reversal of yellow eel
Inducement of sexual reversal of yellow eel
2018-07-04 -
Attention should be paid to the parent cultivation of herring
The cultivation of parent fish is not only related to the goal of inducing estrus and giving birth, but also directly affects the number of eggs, hatching rate, survival rate and growth rate of fry. Therefore, a comprehensive study should be made according to the different stages of gonadal development of parent fish.
2020-11-08 Herring parent fish cultivation need attention -
Intensive cultivation techniques of parent fish during transformation period
After the beginning of spring, the gonadal development of parent fish gradually transformed with the increase of water temperature. Especially before giving birth from the beginning of spring to the middle of May, the gonadal transformation of parent fish is very fast, and the ovary coefficient can reach 15% to 20%. During this period, strengthening the cultivation and management of parent fish during the transformation period can promote smooth spawning; on the contrary, gonadal development will stagnate or even degenerate. The intensive cultivation techniques of parent fish during the transformation period are as follows. First, divide the pool at the right time. In order to grasp the growth and development of parent fish and facilitate the arrangement of spawning and reproduction, the parent fish should be divided into ponds when the water temperature is 10 ℃. Disinfect the small pond before dividing the pond
2019-01-15 -
High density culture of wheat spike fish
Seed and seedling selection: fish fry with mature gonads, strong physique, intact scales, free from injuries and parasites should be selected. Fish fry stocking: about 8-100000 fry per mu. Fish fry management: feed food once a day in the morning and evening, either with self-made feed or with
2020-11-08 Wheat ear fish height density culture summary seedling selection response gonad -
Techniques for large-scale breeding of puffer fish
The puffer fish egg is small and the egg diameter is only 1. About 1 mm, high gonadal index and large number of eggs, which creates a prerequisite for large-scale breeding. Large-scale breeding should also grasp the following technical links: first, a sufficient number of parent fish with well-developed gonads.
2020-11-08 Aquaculture puffer fish scale breeding technology eggs small -
Anti-seasonal breeding of sweet fish
1. Facilities and methods (1) Facilities 1. Seedling room. It is reconstructed from plastic shed, 500 cubic meters of water, black shading net to adjust light intensity, control light intensity below 5000 lux. 2. Brood fish culture pond. Cement pond, rectangular (3m × 2.65m), pond depth 1m, double as bait pond and nursery pond. 3. Water supply facilities. Groundwater is used, and pumps are used to supply water through main and branch pipelines. 4. Inflatable equipment. 2 ordinary air pumps, one for every 1~2 square meters in the nursery pool
2019-01-16 -
The Culture technique of mantis shrimp
People in different regions of China have different names for oratosquilla, such as: Oratosquilla, shrimp crawler, crawling shrimp, shrimp tiger, belt shrimp, shrimp woman, shrimp male, wrasse urine shrimp, pee shrimp, pee shrimp, shrimp dog bullet, shrimp, rich shrimp, pipa shrimp, flower worm, shrimp skin bullet worm,
2020-11-08 Skin shrimp aquaculture technology China different regions people -
Infectious gonadal gastritis in chickens and its prevention and control measures
In recent years, an infectious disease characterized by poor growth, emaciation, poor uniformity, enlarged glandular stomach such as milky globule, glandular gastric mucosal ulcer, exfoliation and myogastric erosion has caused great losses to the breeding industry. This disease is called infectious glandular gastritis. First, the pathogen of the disease has not been clearly stated. The pathogen of the disease is a coronavirus, and other viruses are also associated with the disease, such as low-fiber diet, mycotoxin, reovirus, tumor-induced virus, avian reticuloendotheliosis virus, polyomavirus, adenosis.
2019-01-15 -
Breeding skills of clown fish
Algae-eating snails, five-claw shellfish and so on are the same as the artificial reproduction of nine-hole shellfish that we eat every day, when the gonads mature, we can use simple warming method or cooling method to stimulate them to release eggs and semen. First of all, take out the mature breeding shellfish, the female-to-male ratio is about 1:3, use the heater or ice cube to slowly rise or drop the water temperature for about 4 ℃, then rapidly cool or raise the temperature for 2 ℃, and then put it back into the original tank and return it to the room, where a large number of white smoky sperm and egg particles can be seen. There are slightly more females than males in most shellfish. Take nine-hole shellfish as an example.
2019-01-16 -
Pearl culture technology in seawater
Pearl culture technology in seawater
2018-07-10 -
What kinds of cold water fish do you have? Which are suitable for novice breeders?
Cold-water fish refers to fish that cannot survive when the water temperature is higher than 20 degrees. It is called cold-water fish. There are many kinds of cold-water fish, so what kind of cold-water fish do you have? Let's learn about it. What kinds of cold water fish do you have? Cold water fish are mainly divided into Loach family and flat fin Loach family.
2020-11-27 Cold water fish have which variety suitable novice breeding cold water -
Intensive cultivation of parent fish in spring
Spring is the key period for the gonadal growth of parent fish, and the quality of parent fish cultivation at this stage is directly related to the success or failure of artificial reproduction of domestic fish, so on the basis of usual cultivation, we should pay special attention to spring cultivation. 1. Adjust the water level of the parent fish pond and increase the water temperature. Timely drainage on a sunny day to reduce the water level of the fish pond and accelerate the increase of the water temperature of the fish pond. The displacement can reduce the water level of the fish pond by about 30 cm. When cloudy and rainy days or cold air comes, fill the pool water in advance to slow down the heat dissipation. two。 Strengthen feeding management and investment
2019-01-15 -
Goldfish distinguish between male and female
Goldfish distinguish between male and female
2018-07-24 -
Strengthening the management techniques of parent fish cultivation and aquaculture in winter
Strengthening the management techniques of parent fish cultivation and aquaculture in winter
2018-07-14 -
How to distinguish the males and females of the four major domestic fish-herring, grass carp, silver carp and bighead carp?
There are many kinds of fish, and many fish can easily distinguish between male and female from the various characteristics of their appearance, but there are also many fish that are difficult to distinguish between male and female by their appearance. How can the four major domestic fish-herring, grass carp, silver carp and bighead carp be distinguished between male and female? The male and female identification of Sijie fish
2020-11-11 Four everyone fish herring grass carp silver carp bighead carp male and female -
Seedling production of barracuda
The seedling production of mullet includes two steps: artificial propagation and seedling breeding. The former is divided into parent fish cultivation, induced spawning (artificially induced ovulation), artificial insemination, artificial hatching and other processes, while the latter is divided into two processes: fry cultivation and fingerling cultivation. In the study of artificial reproduction of grey mullet, the first artificial spawning of grey mullet was completed in Italy as early as 1930. It was not until the past 10 or 20 years that it attracted the attention of relevant countries in the world, and became an important topic in international biological research. China, the United States, India, the former
2019-01-16