A kind of overwintering and artificial propagation method of sea dragon

A technology of artificial breeding and sea dragon, applied in application, climate change adaptation, fish farming, etc., to achieve high growth rate, wide adaptable temperature range, and high larvae output rate

Active Publication Date: 2019-04-16
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few relevant research reports on sea dragon breeding in China, and foreign countries are limited to artificial breeding experiments of some ornamental sea dragon species

Method used

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  • A kind of overwintering and artificial propagation method of sea dragon
  • A kind of overwintering and artificial propagation method of sea dragon
  • A kind of overwintering and artificial propagation method of sea dragon

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specific Embodiment

[0019] A method for overwintering and artificial propagation of sea dragons, comprising the following steps:

[0020] (1) Overwintering culture Place wild-caught sea dragons that have been domesticated artificially in fiberglass tanks, and control the breeding conditions as follows: temperature 8-20°C; salinity 18-32; light intensity 30-120Lx; oxygenation 5-10L / h, the breeding water level is 60-100 centimeters, and the breeding density is 80-100 tails / square; the seawater for cultivation is sea crystal plus aerated tap water to prepare a solution with a salinity of 25-28 or natural seawater through sand filtration; the bait is Frozen brine shrimp or frozen mysis larvae, the bait size is 0.5-1 cm, feeding twice a day, the feeding time is 8 am and 2 pm, the feeding amount is 12-15% of the wet weight of the hippocampus, every evening Replace 15-25% of seawater after removing residual bait and feces by sucking dirt before turning off the lights;

[0021] (2) Parent body nutritio...

Embodiment 1

[0030] The bottom area of ​​parent sea dragon nutritional enhancement is 0.5m 2 , In a glass fiber reinforced plastic barrel with a volume of 300L, the intensified test of Hailong's body is carried out. Set the sea dragon density to 10, 15, 20, 25, 30 pairs / barrel, and the water temperature gradient to 16, 18, 20, 22°C. Investigate the feeding rate and growth rate of sea dragons in each treatment. Feed live brine shrimp (cultured for 1 week after hatching), live mysis larvae (body length 0.5-1 cm) or larvae (body length 0.7-0.8 cm) of some prawns (such as Penaeus vannamei, Penaeus chinensis, etc.), The feeding density is 50-80 sea dragons per tail, and the feeding can be divided into two times a day. Every evening before turning off the lights, suck dirt to remove residual bait and feces, and then change 10-15% isothermal seawater. The test lasted for 2 weeks, and the results are shown in Table 1 and Table 2. As the temperature rises, the growth rate of sea dragon is increa...

Embodiment 2

[0038] The sex ratio and density of the broodstock are in the same size fiberglass barrel as in Experiment 1 to test the optimal sex ratio and the best stocking density of the sea dragon broodstock. A total of two experiments were designed, one of which set 5 sea dragon density gradients, respectively 1, 3, 5, 7, 10 pairs / barrel (female to male ratio 1:1), the water temperature was 20±1°C; the other experiment selected The parent density of 5-6 pairs / barrel, set 4 sex ratio gradients, respectively 2:1, 1:1, 2:3, 2:1, and the breeding temperature is 20±1℃. Investigate the mating of sea dragons in each treatment Success rate and average number of sea dragon larvae per litter. Other test conditions are the same as the above example, and the results are shown in Table 3. The density of different broodstock has an impact on their mating and pregnancy. From the perspective of the mating success rate, the greater the density of the breeding broodstock in the environment, the mating ...

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Abstract

The invention discloses a syngathus overwintering and artificial reproduction method. The method is characterized by comprising the following steps: (1) fishing domesticated syngnathus into glass steel barrel for overwintering breeding; (2) adjusting breeding water temperature and stocking density in March to April in the next year and starting to feed live baits for nutrition enhancement of brood stock; (3) making artificial reproduction preparation according to a male and female proportion of 1:1 or 2:3 and a configuration density of 5 to 6 pairs per barrel; (4) performing larva incubation and production management: after germ cells are incubated for 22 to 25 days in brood pouches of male syngnathus in a post-coitum phase, namely, in a production phase, each syngnathus produces 530 to 865 larvae; (5) controlling the initial breeding density of larvae to be 1000 to 1500 per cubic water body and reducing the breeding density to 500 per cubic water body and performing management on bait delivery and water quality for larva cultivation and breeding for 3 to 4 weeks. The method has advantages of simple and practical operation and high larva production rate.

Description

technical field [0001] The invention belongs to the technical field of agricultural mariculture, and in particular relates to a method for overwintering and artificial propagation of sea dragons. Background technique [0002] Sea dragon is a kind of marine medicinal source organisms, with remarkable efficacy, which is included in the Chinese "Pharmacopia" and various ancient prescriptions of traditional Chinese medicine. At present, there is still a certain amount of wild sea dragons in my country's sea areas, but in recent years, natural resources have declined significantly, and artificial breeding is the only development direction and way in the future. The development of this technology and industry awards the protection and satisfaction of sea dragon resources. Market demand plays an important role. [0003] At present, there are few relevant research reports on sea dragon breeding in China, and foreign countries are limited to artificial breeding experiments of some or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10A01K61/17
CPCA01K61/00Y02A40/81
Inventor 徐永健牟金婷梁崇琦
Owner NINGBO UNIV
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