The method of artificial regulation to realize the natural mating and spawning of sturgeon

A natural mating and Dabry's sturgeon technology is applied in the field of fishery resource conservation research to achieve high efficiency and ensure genetic diversity

Active Publication Date: 2021-12-28
YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Abstract
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for artificially regulating and controlling the natural mating and spawning of Dabry's sturgeon through a series of technical means such as artificial broodstock selection, water flow environment, and substrate environment regulation. Natural mating and spawning in an environment

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  • The method of artificial regulation to realize the natural mating and spawning of sturgeon
  • The method of artificial regulation to realize the natural mating and spawning of sturgeon
  • The method of artificial regulation to realize the natural mating and spawning of sturgeon

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Embodiment 1

[0035] The method of artificial regulation to realize the natural mating and spawning of Dabry's sturgeon, including:

[0036] 1. Selection of broodstock of Acipenser dabryii: 4 females and 6 males of Acipenser dabryii were screened with gonad development to stage IV by B-ultrasound. Among them, the B-ultrasound picture of the female sturgeon requires that the gonads are fully developed, and the echo of the eggs can be clearly observed, see figure 1 ; Male sturgeon B-ultrasound pictures require full gonad development, consistent testicular echo, and obvious cut dark area, see figure 2 .

[0037] 2. Domestication of the parents of the Dabry's sturgeon: From March to April 2016, the domestication of the parents was carried out in the domestication pool using water stimulation. The average flow velocity of the water flow is 0.3m / s (the flow velocity ranges from 0.2 to 0.4m / s), and the water flow is stimulated 3 times a day, each time for 2-3 hours, and domesticated for a total...

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Abstract

The invention discloses a method for artificially regulating and realizing the natural mating and spawning of Dabry's sturgeon. For the first time, the present invention adopts artificial regulation technical measures such as B-ultrasound parent non-damage identification, selection of sexually mature fish, riverbed quality regulation, water flow regulation, etc., thereby realizing natural Ovulation, natural ejaculation, and simultaneous male and female maturation. It avoids the traditional use of artificial hormone induction, artificial extrusion of the abdomen for egg collection, artificial insemination, damage to the fish body and artificial selection process, which is a major breakthrough in the protection of Dabry's sturgeon. Utilizing the method provided by the present invention, the fertilization rate of Dabry's sturgeon is comparable to artificial propagation (60-80%), and due to the agglomeration and adhesion of fertilized eggs, the seedling hatching rate (20-50%) is lower than artificial propagation, However, the survival rate (80%-90%) of hatched seedlings is higher than that of artificially propagated seedlings.

Description

technical field [0001] The invention belongs to the research field of fishery resources protection, and in particular relates to a method for artificially regulating and realizing the natural mating and spawning of Dabry's sturgeon. Background technique [0002] With the impact of human activities, the loss or decline of habitat functions, the decline of rare and endangered fish natural resources is increasing, the artificial captivity of wild populations is carried out, and a certain number of artificial conservation populations are established. Wild resources have become an important measure for the international protection of rare and endangered fish and resource conservation. However, in the long-term captive breeding process, due to the uniformity of the breeding environment relative to the natural environment, the biological characteristics (such as predation behavior and reproductive ability) of captive fish have changed, and the viability of farmed fish released into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10
CPCA01K61/00Y02A40/81
Inventor 杜浩危起伟罗江冷小茜褚志鹏周琼
Owner YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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