Syngnathus overwintering and artificial reproduction method

An artificial breeding, sea dragon technology, applied in fish farming, application, climate change adaptation and other directions, to achieve the effect of wide adaptation temperature range, simple operation, high growth rate

Active Publication Date: 2017-04-26
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are few relevant research reports on sea dragon breeding in China, and for

Method used

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  • Syngnathus overwintering and artificial reproduction method

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Experimental program
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specific Embodiment

[0025] A method for overwintering and artificial propagation of sea dragons, comprising the following steps:

[0026] (1) Overwintering breeding

[0027] The wild-caught and domesticated sea dragons were placed in glass fiber reinforced plastic tanks, and the breeding conditions were controlled as follows: temperature 8-20°C; salinity 18-32; light intensity 30-120 Lx; oxygenation 5-10 L / h. The water level is 60-100 cm, and the breeding density is 80-100 tails / square; the seawater for breeding is a solution with a salinity of 25-28 or sand-filtered natural seawater prepared with sea crystals and aerated tap water; the bait is frozen brine shrimp Or frozen mysis larvae, the bait size is 0.5-1 cm, feed 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, suck every evening before turning off the lights Replace 15-25% of seawater after removing residual bait and feces;

[0028] (2) Parental nutrition fortification

...

Embodiment 1

[0041] Nutritional enhancement of parent sea dragon

[0042] The bottom area is 0.5 m 2 , in a 300 L glass fiber reinforced plastic barrel, the intensification test of Hailong parent body was 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 ℃. Investigate the feeding rate and growth rate of sea dragon 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. Before turning off the lights every evening, suck the 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. With the increase of temperature, the growth rate of sea dr...

Embodiment 2

[0050] Sex ratio and density in brood stocking

[0051] In the glass fiber reinforced plastic tank with the same specification as Experiment 1, test the optimal sex ratio and optimal stocking density of the sea dragon's broodstock. 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 ℃; 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 egg pregnancy. From the perspective of the mating success rate, the greater the density of the breeding broodstock in ...

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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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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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