Operating rules for pollution-free breeding of domestic fish

I. 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. The pond is strictly disinfected with quicklime after exposure to the sun.

3. Parent fish come from improved seed farms with national qualification, and reserve parent fish are properly selected and bred. Strict transportation and epidemic prevention programs are adopted in parent fish transportation to ensure that parent fish are free from disease and damage.

4. Parent fish stocking should be put in accordance with the scientific proportion of mixed culture, highlight the key species, and control the right amount of fish to ensure that the main fish is well cultivated and developed normally.

5. The parent fish feed and fertilizer should be harmless, and the feed quality should meet the testing requirements of the national quality department and the "NY5072~2002 safety limit for pollution-free food and fishery formula feed". The green material should be fresh, tender and palatable, and the organic fertilizer should be fully fermented before application.

6. During the breeding period of parent fish, pay attention to the regulation of water quality, keep the water quality alive, tender and cool, and improve the water quality by means of frequent injection of water, application of quicklime, frequent increase of oxygen in high temperature season, application of microbial preparation and so on.

7. Persist in giving priority to prevention and strengthen the prevention and control of diseases and insect pests. In drug prevention, the selection of fishery drugs should be carried out in accordance with the "NYS071~2002 guidelines for the use of pollution-free Food and Fisheries drugs".

8. Set up a post on duty all the year round, specialize in managing and protecting parent fish, and do a good job in five precautions against theft, damage, flood, escape and injury.

9. Do a good job in the management log of pollution-free cultivation of parent fish, and record the operation contents and effects in the production of parent fish in time.

II. Production management and operation during the incubation period

1. Before incubation production, make full preparations in all aspects, including production technical training, personnel post setting, preparation of various materials, commissioning of machinery and equipment and incubation facilities, etc.

two。 Half a month before hatching, we should draw a net to observe the status of parent fish and sort them. During the induction of labor, the operation of the process of pulling the net, selection and operation of the parent fish should be careful so as not to frighten and damage the parent fish.

3. The selection of spawning time should be combined with the gonadal development of parent fish, pond water temperature, effective accumulated temperature, season and weather factors, so as to ensure the success rate of hatching and improve the quality and survival rate of fish fry.

4. The preparation of oxytocin should be carried out strictly according to the technical requirements, and the suitable type and dosage of oxytocin should be selected according to the species, sex, body weight and development status of parent fish.

5. The tube expansion of postpartum parent fish should be strengthened to reduce the damage of parent fish. After detoxification treatment, the parent fish should be put into the postpartum breeding pond in time after detoxification. After proper egg squeezing, ointment is applied to the wound site, and strictly sterilized and put into the postpartum breeding pond. The seriously injured parent fish should be specially cultivated and then cultured in the pond after recovery.

6. Reservoirs, spawning ponds and ring roads should be disinfected and set aside in time, water should be strictly disinfected, production operations such as egg collection should be careful to prevent damage to fish eggs, egg density should be appropriate, and counting should be as accurate as possible.

7. The hatching management should be careful, the water should be stirred frequently, the position of the nozzle should be adjusted properly, the water flow speed should be suitable, the water temperature and water quality should be tested every 4 hours, the filter screen should be washed frequently, and the fish eggs and fry should be kept in a suitable mobile water environment. Attention should be paid to the sanitary management during the incubation period, and the tools used must be disinfected in time to prevent virus damage to fish eggs and seedlings.

8. Timely observe the development process of fish fry, deal with emergencies in time, collect fry in time after the emergence of waist point, do not squeeze fry too much, and feed proper amount of yolk paste before fry goes into the pond to improve the survival rate of fry in pond.

9. Make timely production records during the induction of labor and incubation.

III. Pollution-free operation in the process of fish fry cultivation

1. The cultivation pond environment, water quality and other conditions must comply with the relevant regulations on pollution-free food production (requirements for the cultivation of sibling fish), and require adequate electricity, convenient transportation, drainage and irrigation systems and other auxiliary facilities.

two。 The pond should be cleaned and disinfected thoroughly, with appropriate amount of water injection and moderate water quality.

3. The number of fish fry should be suitable, with no more than 200000 fish fry per mu, no more than 20, 000 fish per mu, no more than 10, 000 summer flowers per mu, spray and black fry should be cultivated alone, and fish fry can be mixed in the summer flower stage, but the main fish culture should be emphasized and the collocation should be reasonable.

4. Feed feeding should be scientific, depending on water quality conditions, fish intake and weather, soy milk should be sprinkled evenly and carefully during water spray cultivation, and Wu Zai began to feed pellet bait for the domestication of feeding fish in the later stage. The bait quality should be in line with the "Safety limit for pollution-free Food and Fishery compound Feed" (NY5072~2002) standard, and the feeding operation should be carried out in accordance with the requirements of "three looks and four determinations".

5. In the process of cultivation, the regulation of water quality should be strengthened, and the water quality should be improved by means of water injection and exchange, application of quicklime, regulation of water level and application of microbial preparation, so as to keep the water quality "fat, alive, tender and cool".

6. We should give priority to prevention and strengthen the concept of disease prevention, and the use of drugs should follow the "guidelines for the use of pollution-free food and fishery drugs". Under the guidance of technical personnel, we should use drugs scientifically, prevent and cure diseases, and do not indiscriminately apply fishing drugs.

7. Make production records in time and record the production operation procedures and effects in the process of aquatic seedling cultivation according to the traceability requirements of aquatic product quality.