Composite liquid, treatment liquid and method for controlling saprolegniasis during incubation period of freshwater fish viscid eggs

Abstract

The invention discloses a composite liquid, a treatment liquid and a method for controlling saprolegniasis during an incubation period of freshwater fish viscid eggs. The composite liquid is preparedfrom the components of clotrimazole, diatomite, anhydrous sodium sulfate, ferrous sulfate, gallnut seed, and an antitackiness agent; the treatment liquid is prepared from the components of a complex liquid, magnesium silicate and sodium chloride. The method comprises the following steps: soaking an incubating tool into the complex solution, then pouring freshwater fish fertilized ova into the treatment liquid until the freshwater fish fertilized ova into a dispersed granular shape, then carrying out flow water incubation, and adding the composite liquid during the incubation period. Compared with the prior art, according to the composite liquid, the treatment liquid and the method for controlling saprolegniasis during an incubation period of freshwater fish viscid eggs, through selection of hatchery water source, hatchery tools, and a series of preliminary disinfection and impurity removal measures, the special composite liquid is used cooperatively in flow water incubation, and an accurate hatching parameter is controlled, during an entire incubation process, effective suppression of saprolegniasis during an incubation period of freshwater fish viscid eggs is achieved, occurrenceand spread of the saprolegniasis are fundamentally solved, and breeding rate of freshwater fish is increased.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a composite liquid, a treatment liquid and a method for controlling saprolegniasis during the incubation period of viscous eggs of freshwater fish. Background technique [0002] Saprolegniasis, also known as white hair disease, water temperature is a very critical factor for the outbreak of saprolegniasis. Saprolegniasis spores grow fastest when the temperature is around 20°C, grow slowly when the temperature is lower than 15°C, and basically grow when the temperature is higher than 25°C. Stagnation. The sticky eggs of freshwater fish, such as carp, crucian carp, bream, bream, loach, etc., usually breed in early spring. The water temperature at this time is 15-25°C, which is the most suitable for the growth of saprolegnia spores. During the season of sudden temperature changes, it is easy to cause large fluctuations in air temperature and water temperature, so saprolegniasis...

AI Technical Summary

Problems solved by technology

Because the outer mycelium of Saprolegnia is very long (up to 5-10mm or even longer), it will cover the water flow of the surrounding eggs, thus causing the sheltered normally developed fertilized eggs to die due to hypoxia, and then Saprolegnia in these dead eggs It grows rapidly again, and grows more hairs to cover more normal fertilized eggs. Such a vicious cycle can cause all eggs to die, resulting in failure of hatching.

[0004] At present, the control methods for saprolegniasis in freshwater fish can only inhibit the growth of saprolegniasis, but cannot completely eliminate them.

Conventional control methods mainly carry out prevention and control from the three key factors of fish eggs, saprolegnia spore quantity and water quality conditions. Saprolegniasis outbreak still unavoidable