In order to ensure the survival rate of fry, it is often necessary to supply palatable, rich and nutritious open bait at the early stage of breeding. Several kinds of open bait commonly used in fry culture are egg yolk, soybean milk, rotifer, algae and aquatic microecological agents.
The digestive system of fish consists of digestive tract and digestive gland. The digestive tract has differentiation of gastrointestinal tract and obvious pancreas. Because fish live in water all their lives, their digestive organs and feeding habits are adapted to life in water. Located between the maxilla and mandible, there is no salivary gland in the mouth.
Fish's oropharyngeal cavity has real teeth, which can take the initiative to eat and prey, which is more advanced than round mouth. The teeth on the lower jaw of gill Yalong are transformed from shield scales, and the teeth of teleost are divided into oral teeth and laryngeal teeth according to their positions. /cefc 1e 178 a82b 90 1590 1 164c 638 da 97739 12ef 25？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 600% 2Ch _ 800% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto