Spring viremia of koi carp
Spring viremia (SpringViremiaofCarp;SVC) of koi carp is mainly caused by carp rod virus (Rhabdoviruscarpio). It is a common disease in koi breeding and is prevalent only when the climate is getting warmer in spring (the water temperature is about 13-20. ℃). It mainly harms the brocade carp over one year old, and the fry and breeding fish are rarely infected. Most of them are raised in open-air ponds and in indoor fish tanks, and the incidence is less because the change of water temperature is not so violent. In the cold water period in nature, the disease is chronic, and when the water temperature warms up in spring, it is acute, and the mortality rate is high. The main method of prevention and control is to clean up the sediments of the pool at the end of winter, strengthen the disinfection of water sources, and change water regularly to prevent drastic changes in water quality.
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Fish head rice
The head of fresh Ankang fish is pickled and stacked or put into a tank (pool) with 5-7% salt. After about 15 hours, it is washed, drained, scalded in boiling water to make the muscle contract, and then steamed in a cage. After about 1 hour, it can be out of the pot (the bones are easy to be separated). After cooling, the fish bones are removed in the pot (after the fish bones are sun-dried, crushed and processed fish bone meal, used as feed). The larger pieces of meat are broken into small pieces by hand and basked on the mat. After drying, it becomes fish head rice, which can be packed in small plastic bags. The color of the finished product is yellowish and the meat is of average size.
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How to give first aid to fish fry coma during transportation
In the course of transportation, fish species often consume too much physical strength due to excessive turbulence, resulting in coma and "turning white" phenomenon, if not rescued in time, it is very easy to cause the death of fish species. This paper introduces a freehand first aid method with good effect and simple operation. the specific method is as follows: when the fish is found in a coma or whitening, immediately put the fish in the clear water with a water temperature of 10 ℃-20 ℃, which is located in the clear water from the wind to the sun, and water the water frequently, so that the spray can be splashed evenly on the belly of the fish, so that the fish can return to normal. The frequency of watering is close to the breathing rate of the fish.
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