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What are the common problems of fish farming
Release time:
2024-06-25 20:16
1. water quality problems
Dissolved oxygen deficiency: dissolved oxygen is an important condition for fish to maintain life activities, low dissolved oxygen in water will affect the feeding and growth of fish. Under normal circumstances, the amount of dissolved oxygen in water should reach 4-5.5mg/L or more.
PH (PH value) is not suitable: fish tolerance to PH value range is generally between 5.0-9.0, suitable PH value range is between 7-8. Too high or too low pH will affect the growth and health of fish.
Excessive harmful substances: excessive levels of CO2, hydrogen sulfide, biogas and other harmful substances in aquaculture water will have toxic effects on fish and affect the growth and survival of fish.
2. disease problems
Water mildew: A disease caused by water mold invading fish bodies, commonly found in fish body damage and scale shedding. The body surface of the diseased fish is covered with white or gray water mold filaments, which affects the feeding and survival of the fish.
Bacterial enteritis: The epidemic season is from April to November. It is caused by bacterial infection. Sick fish swim slowly, lose appetite, and die in severe cases.
Bacterial septicemia: The epidemic season is mainly from April to November. The main pathogen is Aeromonas enterohydrophilus. The diseased fish is congested and bleeding in vitro and in vitro, and the mortality rate is high.
3. Feeding Management Issues
Feed problems: unreasonable feed feeding will lead to slow growth of fish, frequent disease. The quality and type of feed should be selected according to the type and growth stage of the fish.
Improper breeding density: High breeding density will increase the competitive pressure of fish and affect the growth and health of fish. At the same time, high-density farming can easily lead to deterioration of water quality.
Lack of daily observation and management: the daily observation and management of fish is insufficient, and the problems in the growth process of fish can not be found and dealt with in time, which affects the breeding effect.
4. environmental issues
Improper temperature control: fish are variable temperature animals, the adaptation range of water temperature is limited. Water temperature is too high or too low will affect the growth and reproduction of fish.
Insufficient light: light is a necessary condition for photosynthesis of phytoplankton in water, and the oxygen produced is the main source of dissolved oxygen in water. Insufficient light will affect the content of dissolved oxygen in the water, which in turn will affect the growth of fish.
5. other issues
Improper water change: water change when the temperature difference is too large or water quality changes too much will have adverse effects on fish. When changing water, attention should be paid to control the temperature difference and water quality changes.
Hypoxia asphyxia: due to the deterioration of water quality, lack of dissolved oxygen and other reasons caused by fish hypoxia asphyxia is one of the common breeding problems. Water quality should be tested regularly and measures should be taken to improve water quality and increase dissolved oxygen.
These are the common problems and their causes in the process of fish culture. In view of these problems, farmers should take corresponding measures to prevent and deal with them, so as to ensure the healthy growth and breeding benefits of fish.
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