parent fish Learn more about parent fish
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Technical measures to reduce the death of spawning parent fish
Reducing the death of spawning parent fish is an important technical work in fish fry culture. There are two main factors causing the death of parent fish in spawning. One is that parent fish consume a lot of physical energy in the process of spawning and reproduction, which increases the side effects of spawning drugs and reduces the resistance of parent fish. If the fish is seriously injured, various pathogens will take advantage of the opportunity to infect the fish and cause disease, resulting in the death of the parent fish. Second, the physique of the parent fish is poor, or the water temperature changes greatly during the induction of labor, and the improper dose of the drug (the dose is too high or too low), the parent fish can not give birth normally.
2019-01-16 -
Don't forget to protect the parent fish in order to induce labor.
Reducing the death of spawning parent fish is an important technical work for fish fry producers. In the production practice, we found that there are two reasons for the death of parent fish: first, the physical exertion of parent fish in the process of spawning and reproduction, coupled with the side effects of spawning drugs, reduce the resistance of parent fish, if the fish is seriously injured, a variety of pathogens will take advantage of the opportunity to infect the fish and cause disease, resulting in the death of the parent fish. Second, the physique of the parent fish is poor, the gonadal development is poor, or the water temperature changes greatly during the induction of labor, and the dosage of drugs used to induce labor is inappropriate.
2019-01-16 -
Key Techniques for Reducing the Casualties of Parental Fish
The main factors leading to the death and injury of spawning parent fish are as follows: one is that the parent fish consumes a lot of physical energy in the process of spawning and reproduction, and the side effects of spawning drugs make the resistance ability of the parent fish decrease. If the fish body is injured, the pathogen infection is easy to cause diseases; the other is that the parent fish is poor in constitution, or the water temperature changes greatly during spawning, and the dosage of spawning drugs is improper. The parent fish cannot spawn normally, and thus causes its own physiological activity disorder and death. Therefore, in production, it is necessary to effectively grasp the prenatal cultivation of parent fish, so that the gonad development of parent fish is normal.
2019-01-16 -
Parent cultivation and propagation techniques of cultured tilapia
The reproduction of tilapia does not need artificial aphrodisiac and running water stimulation, as long as the water temperature is more than 20 ℃, mature male and female parent fish can reproduce naturally in the same breeding pond. When the water temperature is stable at 25-29 ℃, it can reproduce every 30-50 days.
2020-11-08 Culture tilapia parents breeding and reproduction technology -
The three hurdles of parent fish in summer
The Beginning of Summer to Lesser Fullness of Grain is the best time for parent fish to induce spawning. at this time, the water temperature is suitable, the spawning rate and hatching rate of parent fish are high, and the survival rate of fry is also high after entering the pond. If we seize this favorable opportunity and strictly control the selection of parent fish, the use of drugs and the management of induced labor, the success of induced labor can be achieved. Whether the mature parent fish is mature or not determines the effect of spawning. When selecting parent fish, its maturity is generally identified according to its external characteristics. The belly of mature female parent fish is swollen, round, soft and elastic.
2019-01-15 -
Key points of cultivation techniques of parent fish in winter
The cultivation of parent fish can be divided into postpartum nursing, autumn cultivation, winter cultivation and spring cultivation. Due to the low temperature in winter, the activities of parent fish are reduced, the feeding ability is weak, and fish diseases are easy to occur. If it is poorly managed, it will have a great impact on artificial hatching, fry production, adult fish culture and other production links in the coming year. The main technical points for the cultivation of parent fish in winter are as follows: first, the selection of parent fish pond requires sufficient water source, flat bottom, shelter from the wind and sun, water conservation and heat preservation, with an area of 10-15 mu.
2019-01-16 -
The Source and selection experience of Freshwater White Pomfret parent Fish in Culture
The freshwater white Pomfret has a strong reproductive ability, and the parent fish should choose individuals with large size, fast growth, no disease or injury, smooth body surface and distinct color as the parent fish. Moreover, it is necessary to avoid fish that are close to green as parents, so as not to degenerate and affect the growth of offspring.
2020-11-08 Aquaculture freshwater white Pomfret parent fish source and selection experience -
Key points of cultivation techniques of parent fish in winter
The cultivation of parent fish can be divided into postpartum nursing, autumn cultivation, winter cultivation and spring cultivation. Due to the low temperature in winter, the activities of parent fish are reduced, the feeding ability is weak, and fish diseases are easy to occur. If it is poorly managed, it will have a great impact on artificial hatching, fry production, adult fish culture and other production links in the coming year. The main technical points for the cultivation of parent fish in winter are as follows: first, the selection of parent fish pond requires sufficient water source, flat bottom, shelter from the wind and sun, water conservation and heat preservation, with an area of 10 Mel and 15 mu. two
2019-01-11 -
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 -
Source and selection of parent fish of Pelteobagrus fulvidraco
Parent fish for artificial reproduction can be fished and selected directly from rivers, lakes, reservoirs, ponds and other water bodies. This is a common method for artificial reproduction of Pelteobagrus fulvidraco in culture units at present. If there are conditions, you can cultivate your own Pelteobagrus fulvidraco parent fish. And choose from it. When fishing for parent fish from rivers, lakes, ponds, reservoirs or ponds, we should pay attention to the following: specific requirements: ① should be determined to catch parent fish in autumn and winter, when the water temperature is low, which is conducive to selection and operation, and is especially easy to transport.
2019-01-16 -
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 -
Breeding techniques of parent fish in silverfish culture
1. The source of parent fish. Sexually mature individuals caught in the breeding season can be used for artificial reproduction; sexually mature individuals can be used for artificial reproduction; individuals that are not sexually mature shall not be used for artificial reproduction. two。 The fishing of parent fish. The fishing of large silverfish should be carried out during the peak spawning period. fishing can be started in the north of the Yellow River in early December and in the south of the Yellow River from mid-December. Fishing gear can be Gill net (mesh 2a is 1.5-2.4 cm) or ice
2019-01-16 -
Discussion on artificial breeding technology of catfish
Materials and methods 1. The original spawning pond and incubation pond of carp and crucian carp and four major domestic fish were used in the experiment site and facility. Fish nests with palm bark after cooking and disinfection are strung together with bamboo poles or ropes, hanging in the upper and middle layers of the spawning pond, and the bottom of the pond is covered with palm bark. two。 The source and cultivation of parent fish are mainly collected from wild fish species in Biliuhe Reservoir in Dalian City. Parent fish are cultivated and fed with freshwater mixed fish and mussel meat. The average weight of male fish is 500.
2019-01-15 -
Artificial propagation technology of carmine fish
Artificial propagation technology of carmine fish
2018-09-08 -
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 -
How to breed shell fish
1. Selection of parent fish: the selected parent fish must be strong, the gonads are fully mature, and the female and male parent fish must be in estrus at the same time. Parent fish must have the characteristics of this species, and usually there should be intimacy between male and female parent fish. Avoid selecting tropical fish in the same nest or related by blood as parent fish, so as to prevent the quality degradation of offspring caused by inbreeding. Broken fin, crippled, deformed tropical fish are not used as parent fish. 2. The preparation of the breeding tank: due to different parent fish species, the breeding tank is also different. General tropical fish that lay floating eggs
2019-01-16 -
Practical culture techniques of herring
Practical culture techniques of herring
2018-07-09 -
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 -
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 -
Operating rules for pollution-free breeding of domestic fish
1. Pollution-free management and cultivation of parent fish 1. The cultivation base requires no three wastes pollution, the atmospheric environment meets the requirements of "GB3095~1996 Environmental Air quality Standard", the soil environment meets the requirements of "GB15618~1995 soil Environmental quality Standard", and the water used for aquaculture meets the requirements of "NY5051~2001 pollution-free Food Freshwater Culture Water quality Standard". two。 The parent fish pond covers an area of 515 mu and a water depth of 1.5 to 2.5 meters. After exposure, the pond is strictly sterilized with quicklime and so on.
2019-01-15