Permanent marking method for groups of artificially cultivated Chinese sturgeon juvenile fish
A marking method and technology of Chinese sturgeon, applied in fish farming, application, climate change adaptation, etc., to avoid costs and accurately infer the effect of artificial release
Active Publication Date: 2012-06-13
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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Problems solved by technology
[0006] The technical problem to be solved in the present invention is to allow the Chinese sturgeon juveniles cultivated artificially to form specific morphological characteristics in specific parts as permanent marks
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0009] In this method, after the Chinese sturgeon embryos develop to the membrane, the larvae after the membrane are collected into the cultivation tank for cultivation. The water temperature of the cultivation cylinder is controlled at 23°C, and oxygen is added during the cultivation process to ensure sufficient dissolved oxygen in the water. 6mg / L or more, maintain good water quality conditions, and adjust the breeding density to 3000 fish / m 2 . The critical period for the formation of Chinese sturgeon nasal septum tissue is within 7-10 days after the film is released. Due to the high-density cultivation, mutual interference between fry is formed, which affects the contact between this part of the nasal septum tissue and the lower tissue, and the surface of the nostrils. If the nasal septum cannot be formed, a single nostril is formed, and the incidence rate of the single nostril is 50%. It takes 30 days to form a single nostril, and the incidence rate of the overall single...
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The invention discloses a permanent marking method for groups of artificially cultivated Chinese sturgeon juvenile fish, relating to a marking method for artificially cultivated Chinese sturgeon. The technical problem to be solved is to provide a method taking specific morphology formed at a specific part of Chinese sturgeon juvenile fish cultivated by artificial propagation as a permanent marker. The technical scheme of the invention utilizes cultivation density control, water temperature control and oxygen dissolving control, and is characterized in that high density cultivation is carried out with the cultivation density of 3000 tails / m<2>, the time for high density cultivation is within 30 days of nasal development after membrane growth of Chinese sturgeon, mutual fraction and collision during the process of high density cultivation is utilized to interfere and interdict the formation of nasal septum on surfaces of noses of Chinese sturgeon; and the water temperature of a cultivating pond is controlled at 23 DEG C and the oxygenation is carried out in the cultivating process to ensure the content of oxygen dissolved in water is more than 6mg / L and keep good water quality, and amphirhinal of Chinese sturgeon juvenile fish become single nostril within 30 days. The method of the invention is used for permanently marking artificially cultivated Chinese sturgeon juvenile fish. The invention is used as the permanent marker for artificially cultured juvenile Chinese sturgeon.
Description
technical field [0001] The invention relates to a marking method for artificially propagating Chinese sturgeon. Background technique [0002] Chinese sturgeon (A. sinensis Gray) belongs to the order Sturgeoniformes, the family Acipenseridae, and the genus Acipenserus. Known as "living fossil". As a relict species left over from the Cretaceous period, the distribution area is narrow and the number is rare, and it is now in an endangered state. Because the construction of water conservancy projects blocked the spawning and migration channel of Chinese sturgeon, a small number of broodstock were forced to spawn and reproduce in the downstream section of the river, and some broodstock had degenerated gonads and could not reproduce. If swallowed, less than 10% of the eggs can hatch out of the membrane, and the wild population of Chinese sturgeon has declined sharply. During the 19 years from 1981 to 1999, the supplementary population of Chinese sturgeon juveniles and the suppl...
Claims
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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 章龙珍庄平刘鉴毅张涛赵峰冯广朋黄晓荣侯俊利闫文罡
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI