Pelteobagrus fulvidraco is a one-time spawning fish, which has the habit of breeding in groups under natural conditions. The breeding season is from mid-May to mid-July, and the water temperature is 25-30.5℃. Pelteobagrus fulvidraco generally matures at the 2nd instar, and Yang Caigen and others found that Pelteobagrus fulvidraco reached sexual maturity at the overwintering age of 1. The smallest female fish in mature individuals is 1 1.5? Cm, male fish is 13.5? Cm, the sexual maturity of females is earlier than that of males. The absolute fecundity of Pelteobagrus fulvidraco is 2? 500~ 16? 500 capsules, with an average of 4? 000 eggs, the relative fecundity is 58.33 ~ 77.77 eggs/g, with an average of 65.438 0 eggs/g. The main breeding area of Pelteobagrus fulvidraco is in the water area with shallow water level, hard bottom, certain beach foot, high transparency, slow water flow, rich bait resources and suitable for nesting and hatching.

Song et al. studied the change of maturity coefficient of Pelteobagrus fulvidraco from early March to mid-May, and found that the gonad development rhythm of male and female fish was basically the same: from late April to mid-May, the maturity coefficient rose rapidly to the peak, with 26.8% for female fish and 0.98% for male fish. After mid-April, most of the gonads of Pelteobagrus fulvidraco in the breeding population reached stage IV, and a large amount of yolk was deposited in the eggs. Large, medium and small egg groups are obviously visible, and the testis is milky white, multi-branched, full and shiny. In the early stage of breeding, the number of male fish caught is more than that of female fish, which is mainly related to the fact that male fish gonads mature earlier than female fish. Near the late breeding period, the number of male fish caught is less than that of female fish, which may be related to the habit of male fish nesting, guarding nests and protecting offspring.

Study on seedling cultivation

The fry cultivation of Pelteobagrus fulvidraco mainly includes pond cultivation and factory cultivation. Pond culture mainly cultivates a large number of plankton by cutting green manure, fermentation manure and other organic fertilizers to provide open bait for Pelteobagrus fulvidraco larvae. On the one hand, it completely meets the requirements of fry for bait, on the other hand, it plays the role of introducing plankton. Soft-shelled turtle and other high-protein powder materials are sprinkled all over the pond to make up for the shortage of natural bait. Most of the powder materials are directly swallowed by fry, and a few provide sustainable nutrition for the growth of plankton.

With the continuous growth of fry, the quantity and nutrition of plankton can not fully meet its growth requirements, that is, the feeding habits of fry have differentiated. At this time, we should seize the opportunity to use high-protein particles, which can play a role in connecting the past with the future. It is one of the important methods to improve the survival rate of fry by setting palatable bait and various food tables. Good palatable bait and multiple food tables in each food transfer link can ensure that all fry can eat palatable food evenly, so that their growth speed is consistent, their specifications are neat and their survival rate is high. The study of high talent and consistency also confirmed the above viewpoint, and believed that the feeding times had a significant impact on the growth of Pelteobagrus fulvidraco larvae and juveniles. The more feeding times, the faster the growth, and three times a day was more conducive to the growth of Pelteobagrus fulvidraco larvae and juveniles. Therefore, adequate and palatable bait was an important factor affecting the growth of Pelteobagrus fulvidraco larvae and juveniles.

However, the fry culture of Pelteobagrus fulvidraco is very different from the common four major fishes: the eggs of Pelteobagrus fulvidraco are larger, the yolk substance is more, and the incubation time is longer than that of the four major fishes; After hatching, the yolk sac of the larvae is large, so they can't swim horizontally and can only cluster at the bottom of the pool. Hatching 1 ~ 3? Group D absorbed nutrition from yolk sac and carried out endogenous nutrition. Therefore, under the condition of water temperature of 25℃, 4? It is enough to provide them with suitable 12I bait after d. Before this, we should try to keep high dissolved oxygen and a small amount of zooplankton in the pond to ensure the survival rate of larvae.