Brazilian sea bream broodstock induces labor

Appropriate water temperature, water level, oxytocin dosage and oxytocin technology can only work when there are mature broodstock. 1.5 cm long and 0.3 cm wide. Place the removed eggs into a transparent liquid in a glass vessel (95% alcohol 85 parts, formalin 10 parts, glacial acetic acid 5 parts), 1: 15-2. For broodstock with poor maturity, either increase the injection volume or increase the number of injections; for broodstock with good maturity, the dosage can be reduced as appropriate. The effect time is related to the type of drug, fish species, water temperature, number of injections, gonad maturity and other factors. In a quiet environment and slow water flow, hormones will gradually take effect. About 2 hours before estrus, the water flow speed needs to be increased to promote reproductive activities such as chasing, spawning, and sperm ejaculation of broodstock. The living environment of eggs in the ovarian cavity is different from the original environment, that is, the original supply of nutrients and physiological conditions has been lost. Commonly used artificial insemination methods are: dry, semi-dry and wet insemination, among which dry insemination is the most used. The following is an introduction to the dry insemination method. The color of the collected fish eggs, if they are light yellow with grayish tinges, uniform in size, full and round, absorb water quickly, expand evenly and fully, and the ovarian fluid is thick and moderate in quantity, these are high-quality eggs, and the fertilization rate is high; if the eggs are dull in color, with " white eggsTo collect semen, 5-10ml syringe (without needle) is commonly used, and the manually squeezed semen should be inhaled for later use.