Pre-stocking treatment of fish fry

At present, fishermen are basically fattening through fish fry, so fish fry usually go through long-distance transportation to reach the fishing ground. After arriving at the fishing ground, these fish fry cannot be directly put into the pond and need to be treated, otherwise they are prone to the problem of large-scale death of fish fry.

1. Disinfection of seedlings

Because fish fry belong to stagnant water environment for a long time in the process of transportation, and the density of fish fry will be relatively high, it is easy to breed germs during transportation. The first thing to do after the fry arrives is to prepare the fry soaking solution and introduce the fry into it for disinfection to ensure the safety of the fry. Of course, you can also use some other safe disinfectants, such as salt water, you must pay attention to the concentration, especially the concentration of salt water should not exceed 3%.

2. Feeding

After disinfection, it is necessary to prepare for feeding. After all, the fry will not put food on the way of transportation. After reaching the destination, the fry need to be replenished immediately. The first choice for feeding items is the water level of egg yolk. Mix the boiled egg yolk with water and stir well, knowing that the mixed water looks only a little light yellow, and a few eggs can meet the food needs of hundreds of thousands of fish. This is also to make the fry survive better in the coming strange environment. After the fry are full, they can have more time to find food.

3. Adjust the water temperature

When the feeding is finished, it is ready to be released, but it cannot be released at this time. It is necessary to adjust the water temperature of the fry in the current pond first. Generally speaking, the temperature of the water in the pond is much lower than that in the current place where the fish fry live. If released rashly, the fish fry may not adapt to the water temperature of the new pond, resulting in stress reaction and serious casualties. Therefore, the water from the pond should be slowly injected into the current fry survival pond until the temperature on both sides is close.

4. Put in

Release is also a key step, many farmers are used to pouring directly from the air, or into the water, and then quickly pour out the fry, which are very easy to hurt the fry. Normally, the objects containing the fry should be slowly immersed in the water, and then slowly removed from the bottom, allowing the fry to complete the natural growth environment under mild conditions.

Fish fry is actually relatively fragile, so it is best to act gently before release, so that you can not only avoid harming the fry, but also avoid stimulating the fry. A loud vibration or sound will cause fish fry to run around, causing unnecessary losses.