Things to Keep in Mind When Selecting Fish Fingerlings in Winter and Spring

First, pay attention to whether the fingerlings are uniform.

If the fingerlings in the same pond vary in size, have relatively straight belly lines, thin and elongated tails, and slender bodies, then after being placed in a fish cage for 30 minutes they will show weak, sluggish movement, and some may even show symptoms of disease. Such fish cannot be stocked into ponds, nor are they suitable for long-distance transport; you may reduce the stocking density or move them to fertilized water for rearing. If they are indeed diseased, timely treatment is also needed.

Second, pay attention to the body length of the fingerlings.

Whenever seining exercise is carried out, the fingerlings jump vigorously. Catch two fingerlings and place them on the grass: they can keep jumping for a short time, their mouths open and close forcefully, and their bodies move nimbly. The fingerlings have a well-proportioned body surface, a thick back, a broad belly, gray or silvery-white fins and scales, and bright, lustrous eyes. If the fingerlings of the same species in the same pond are uniform in size and show no signs of pest or disease attack, then the quality of these fingerlings is good.

Third, pay attention to whether the pond is fertile or lean.

The fertility of the pond water quality is directly related to the condition of the fingerlings. As the saying goes, "To raise a pond of fish well, first raise a pond of water." If the transparency of the pond water is between 26-30 cm and it appears light green or tea-brown, this indicates good water quality; fingerlings raised in such water are generally in good condition. If the pond water is pale in color and layered patches of blue, green, clear and murky water appear in the body of water, and the stocking density is relatively high, then differences in the condition of the fingerlings will occur. Fourth, pay attention to the activity of the fish school. To observe whether the fingerlings are in good or poor condition in the pond, pay attention to how many dead fish there are in the pond and whether the fingerlings swim in groups. If most of the fingerlings are found swimming scattered on the water surface of the pond with darkened bodies, then the fingerlings are in poor condition; otherwise, the fingerlings are in relatively good condition.