Parent breeding method for promoting gonad development of pelteobagrus fulvidraco
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A cultivation method and technology for yellow catfish, applied in fish farming, application, climate change adaptation and other directions, to achieve the effects of accelerating the recovery of fish physique, restoring physique, and reducing the incidence of diseases in early spring
Inactive Publication Date: 2019-09-20
FISHERIES RES INST ANHUI ACAD OF AGRI SCI
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[0004] In order to solve the technical problem of significantly and stably improving the synchronous development of gonads and sexual maturation in the artificial reproduction technology of yellow catfish, and reduce the cost, the invention provides a parental breeding method for promoting the development of gonads of yellow catfish
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Embodiment 1
[0041] (1) Parental selection and stocking of yellow catfish
[0042] On September 10th, set up yellow catfish breeding cages in the pond. The size of the cages is 2m×2m×2m. On September 20, select yellow catfish adult fish with normal body shape, normal body color, smooth body surface and strong physique. , good fatness, no disease, no disability individuals as parents for cage culture, stocking density of 8kg / box, a total of 150 boxes, cage draft depth of 1.5m.
[0043] Due to the large size difference between male and female yellow catfish, male fish often compete with female fish for food, which affects the growth of female fish. Therefore, male and female individuals need to be raised separately when stocking. There is an obvious reproductive protrusion near the anus of the male yellow catfish, while the corresponding part of the female fish is the genital opening, which can be used to identify the sex of the yellow catfish.
[0044] (2) Physical strengthening before ove...
Embodiment 2
[0062] (1) Parental selection and stocking of yellow catfish
[0063] On September 12th, a net cage for culturing yellow catfish was erected in the pond. The size of the cage was 2m×2m×2m. On September 22, adult fish of yellow catfish were selected, with normal body color, smooth body surface and strong physique. , better plumpness, and individuals without disease or disability are used as parents for cage culture. The stocking density is 9kg / box. The draft of the cage is 1.5m.
[0064] Due to the large size difference between male and female yellow catfish, male fish often compete with female fish for food, which affects the growth of female fish. Therefore, male and female individuals need to be raised separately when stocking. There is an obvious reproductive protrusion near the anus of the male yellow catfish, while the corresponding part of the female fish is the genital opening, which can be used to identify the sex of the yellow catfish.
[0065] (2) Physical strengt...
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Abstract
The invention relates to a parent breeding method for promoting gonad development of pelteobagrus fulvidraco. The method comprises the following specific operation steps of 1, selection and putting of pelteobagrus fulvidraco parents; 2, physique strengthening before overwintering; 3, arranging of a net cage in the overwintering period; 4, water body fertilizing in the overwintering period; 5, feeding restoring after overwintering; 6, daily management; 7, manufacturing and feeding of hormone feed. According to the method, it is guaranteed that the pelteobagrus fulvidraco parents achieve sexual maturity synchronously 3-4 weeks earlier, so that advanced breeding of the pelteobagrus fulvidraco is realized, and the fry breeding period and the commercial fish breeding period are prolonged. According to the method, by taking the measures that the water draft of the net cage is adjusted, the interior of the net cage is covered with alternanthera philoxeroides in winter and a water body is fertilized, the functions of heat preservation and increase of temperature accumulation of fish bodies are achieved, then initial feeding of the parents is earlier after overwintering, the physique can be restored as soon as possible, and the capacity of resisting diseases such as ichthyophthiriasis is enhanced.
Description
technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for promoting the development of gonads of yellow catfish. Background technique [0002] The yellow catfish belongs to the Siluriformes, the family Pleuridae, and the genus of the yellow catfish. It is one of the important farmed fishes in my country. In 2017, the aquaculture output of yellow catfish nationwide was more than 480,000 tons, an increase of 10.5% compared with 430,000 tons in 2016. The aquaculture output of yellow catfish has increased year by year, the market demand is strong, and the price is relatively stable. With the development of the yellow catfish industry, the demand for cultured seed is increasing day by day. At present, the artificial propagation technology of yellow catfish seed has been overcome, but there are still some problems that restrict the development of the industry. (1) The gonad development of female fish is asynchron...
Claims
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Application Information
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