1, the breeding risk is high, and the duck loss rate is high during stocking; Especially in the rainy season every year, sea ducks foraging on the beach are often attacked by typhoons and waves and cannot swim back to the shore, so they die or disappear. Even if the loss of ducks is small, they will greatly reduce or even stop production due to the influence of wind, rain and waves, and it is difficult to recover in a short time. This is the natural disaster that has the greatest impact on economic benefits in the sea duck industry.

2. Limited by the unique stocking methods and natural conditions of sea ducks, it is impossible to carry out large-scale and high-intensity stocking. Compared with artificial captivity and artificial mixed additive feed, the laying rate of sea ducks is low and unstable, and the stocking cost is relatively high, that is, sea ducks are hard to find eggs.

3. The ducklings have weak disease resistance and are easily infected by various harmful microorganisms.