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A winter artificial propagation method of puffer puffer obscurus

A technology of fugu obscurus and artificial breeding, which is applied in the fields of application, climate change adaptation, fish farming, etc., can solve the problems of rising cost of breeding, increase of bait coefficient, and less food intake, so as to save the cost of breeding and meet the needs of the market Demand, avoid the effect of breeding link

Active Publication Date: 2019-10-11
JIANGSU ZHONGYANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the overwintering process in the greenhouse, although the juvenile fish eat bait, the water temperature is relatively low compared with spring and summer, the food intake is small, the weight of the juvenile fish hardly increases, and the bait coefficient increases. , but the cost of farming will rise sharply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: a kind of artificial breeding method of puffer obscurus in winter, comprises the following steps:

[0024] 1. Build broodstock greenhouse cultivation ponds

[0025] Sand bottom cement pool, pool area 200 m 2 ~500m 2 , can control the water temperature above 20 ℃, equipped with a 3000w submersible pump, so that the water flow can reach 0.3m / s~0.6m / s.

[0026] 2. Breeding of broodstock

[0027] In October every year, select broodstock with strong physique, among which female fish are 3 to 6 years old, weighing 1000g~1500g, male fish are 2 to 5 years old, weighing 800g~1200g, and the stocking density is 2 fish / m 2 , the male to female ratio is 1:1. After broodstock enter the greenhouse, increase the salinity by 1.5‰ to 2‰ every day. When the salinity rises to 22‰ to 25‰, after 30 days of breeding, reduce the salinity of the water body by 1‰ every day to freshwater culture. The water temperature is controlled at 20°C to 24°C, the light does not exceed 100...

Embodiment 2

[0036] Embodiment 2: a kind of artificial reproduction method of puffer obscurus in winter, comprises the following steps:

[0037] 1. Build broodstock greenhouse cultivation ponds

[0038] Sand bottom cement pool, pool area 200 m 2 ~500m 2 , can control the water temperature above 20 ℃, equipped with a 3000w submersible pump, so that the water flow can reach 0.3m / s~0.6m / s.

[0039] 2. Breeding of broodstock

[0040] In October every year, select broodstock with strong physique, among which female fish are 4 to 5 years old, weighing 1200g~1500g, male fish are 3 to 4 years old, weighing 1000g~1200g, and the stocking density is 2 fish / m 2, the male to female ratio is 1:1. After broodstock enter the greenhouse, increase the salinity by 1.5‰ to 2‰ every day. When the salinity rises to 22‰ to 25‰, after 30 days of breeding, reduce the salinity of the water body by 1‰ every day to freshwater culture. The water temperature is controlled at 20°C-24°C, the light is 500Lx-1000Lx, a...

Embodiment 3

[0049] Embodiment 3: a kind of artificial reproduction method of puffer puffer in winter, comprises the following steps:

[0050] 1. Build broodstock greenhouse cultivation ponds

[0051] Sand bottom cement pool, pool area 200 m 2 ~500m 2 , can control the water temperature above 20 ℃, equipped with a 3000w submersible pump, so that the water flow can reach 0.3m / s~0.6m / s.

[0052] 2. Breeding of broodstock

[0053] In October every year, select broodstock with strong physique, among which female fish are 3 to 6 years old, weighing 1000g~1500g, male fish are 2 to 5 years old, weighing 800g~1200g, and the stocking density is 2 fish / m 2 , the male to female ratio is 1:1. After broodstock enter the greenhouse, increase the salinity by 1.5‰ to 2‰ every day. When the salinity rises to 22‰ to 25‰, after 30 days of breeding, reduce the salinity of the water body by 1‰ every day to freshwater culture. The water temperature is controlled at 20°C to 24°C, the light does not exceed 1...

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Abstract

The invention relates to an artificial propagation method for takifugu obscurus in winter. The method comprises the following steps of parent fish greenhouse cultivation pool building, parent fish cultivation, parent fish spawning induction, artificial fertilization, fertilized egg hatching and alevin cultivation. According to the artificial propagation method for the takifugu obscurus in winter, the cultivation time of fry from propagation in the current year to overwintering is prolonged, the overwintering cultivation link of the takifugu obscurus is avoided, and the artificial propagation method has the advantages of meeting the market requirement, increasing the cultivation benefit and reducing the cultivation cost.

Description

technical field [0001] The invention relates to the technical field of fish reproduction, in particular to a winter artificial breeding method for puffer puffer obscura. Background technique [0002] Puffer obscurus is a migratory fish. In the natural state, it goes upstream from the ocean to the inland rivers in March every year. From early April to mid-May, the water temperature in the inland waters is suitable. Pufferfish, oligochaetes, and fish, shrimp, snails, mussels, insect larvae and other natural bait resources are abundant. During this period, puffer obscura lay eggs, reproduce, grow and fatten. Reduced, Puffer obscurus swims from fresh water to the ocean to overwinter. Under artificial breeding conditions, we also choose mid-April to mid-May, when the temperature is suitable and the bait resources are abundant, to carry out human reproduction production such as broodstock induction and fertilized egg hatching. By mid-to-late October, after 120 to 150 days of bree...

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 钱晓明徐逍尹绍武郭正龙
Owner JIANGSU ZHONGYANG GRP
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