Core abstracts: 1. Breeding conditions and environmental conditions Astragalus membranaceus is bred once a year, in April-August each year, and the peak period is May-June. Its spawning cycle is longer. Before the arrival of the breeding season of Huang Huan, he first played breeding holes. The general hole is hit by the side of the field, and the hole is usually opened in the shelter of the field. The lower edge of the mouth is immersed in water and divided into the front hole and the back hole. Former spawning, hole length...
1. Breeding conditions and environmental conditions Astragalus only reproduce once a year, in April-August each year, the peak period is May-June. Its spawning cycle is longer. Before the arrival of the breeding season of Huang Huan, he first played breeding holes. The general hole is hit by the side of the field, and the hole is usually opened in the shelter of the field. The lower edge of the mouth is immersed in water and divided into the front hole and the back hole. The first hole lays eggs. The hole is 10 cm long and wide. It is about 5 cm high from top to bottom, and about 10 cm wide. The back hole is slender for shelter. In larger bodies of water or in waters where it is not convenient to make holes, you will find nests of hidden objects like lush vegetation, water grass roots, rubble, and stone seams.
2. The natural sex ratio and the spouse make up the reproductive population of Scutellaria baicalensis more male than male during the entire reproductive period. Among them, females accounted for 91. 3% in February. The gonads gradually reversed from the eggs produced by females in June and August. The number of females gradually decreased to 38. 3% in September. The number of females and females accounted for approximately 10 to 12 months. 50 %. In the fall and winter season, people catch the scorpion to catch up and stay small, so after the spring is still more than female. The breeding of Astragalus mostly belongs to the offspring and their parents, and it also pairs with the previous two generations of males. However, in the absence of males and females, a small number of females in the same batch of A. sinensis were reverted to males, and then they were allowed to breed with their females. This is a special feature of A. sibiricus that is different from other animals.
3 . Naturally spawning and incubating mature females have enlarged belly light orange (also greyish yellow), and some have a red horizontal line. Before spawning, females and males spit bubbles to build nests, and then lay eggs on the grass roots that fall from the top of the hole. Fertilized eggs and foam float on the hole. The fertilized egg is yellow or orange, translucent, and the egg diameter (after water absorption) is generally 2 to 4 mm. Intimacy, especially the habit of male ferrets to protect the eggs, generally guarded until the disappearance of the yolk sac of the seedlings. Parents who spit bubbles in the nest generally have the following effects: First, to make the fertilized eggs difficult to be detected by the enemy, to protect the eggs; second is to make the fertilized egg tray float on the water, while the surface of the water is generally high in oxygen and high water temperature. Appropriate water temperature 2l to 28 °C ), will help improve the hatching rate; Third, in the foam of intimacy and vomiting, there are substances that play an important role in the hatching of quail eggs, and it is not yet known what kind of substance.
From the fertilization to the hatching of Aberdeen, the eggs of Scutellaria baicalensis usually take 5 to 7 days at about 30 °C, and the water temperature at about 25 °C takes 9 to 11 days. The fertility rate and hatching rate of jaundice in nature can reach 95% to 100%.
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