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Large-scale seed cultivation method for Yellow Sea gadus macrocephalus

A breeding method, the technology of cod, which is applied in the field of large-scale seed cultivation of yellow sea cod, can solve the problems of in-depth research and achieve the effect of improving the survival rate

Active Publication Date: 2014-10-01
MARINE BIOLOGY INST OF SHANDONG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few studies on cod in my country, mainly focusing on morphology, feeding habits, environmental factors of larvae and juvenile development, population genetics, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for cultivating large-scale seedlings of cod in the Yellow Sea, the specific steps are as follows: the larvae and juvenile fish cultivation pond is a cement pond of 6m×6m×1.2m, the water depth is 1.0m, and connecting pipes are set up in the center of the pond and outside the pond to keep the water level and drainage unobstructed , the density of larvae in the pond is 10,000 fish / m3, the water temperature for seed cultivation is 6-9°C; the salinity is 30-35‰; the pH is 7.8-8.2, and the dissolved oxygen is 5.1-8.2mg / L. Set up 2 to 4 80-mesh gas stones in the pond, and keep the aeration volume in the cultivation pond at 20 to 35 L / h / m before the larvae open their swim bladders (37 days after the larvae hatch). 3 , 42 days after the hatching of the larvae, after the swim bladder is completely opened, increase the inflation volume to 50L / h / m 3 . One 23W fluorescent lamp is suspended 80cm above the pool, and the light intensity is adjusted to 1000lx-1500lx. The wat...

Embodiment 2

[0019] Embodiment 2, temperature control cultivation

[0020] In this experiment, under the same environmental factors as in Example 1, such as salinity 3035‰ and normal light control conditions, the research temperature was 0, 3, 6, 9, and 12°C, and the effects of five groups of temperature gradients on the cultivation of yellow sea cod larvae were studied. Influence, the results show that:

[0021] Under the condition of temperature 0-6℃, with the increase of temperature, the vitality of larvae gradually increased, the food intake increased, and the deformity rate decreased; Under the condition of ℃, the food intake increased, the vigor of larvae increased, and the deformity rate increased simultaneously; in summary, the optimal survival temperature of yellow sea cod was 6-9 ℃.

[0022] Table 1 Effects of different temperatures on the breeding of yellow sea cod larvae

[0023] temperature

Embodiment 3

[0024] Embodiment 3, salinity control cultivation

[0025] In this example, under the same conditions as in Example 1, the environmental factors such as 6-8°C and normal light control conditions, the research salinity is 0, 5, 10, 15, 20, 25, 30, 35, 40, a total of 9 groups The effect of salinity gradient on the cultivation of cod larvae in the Yellow Sea. The results showed that: (1) The activity of larvae in the 0-25 salinity gradient group gradually increased with the increase of salinity within 24 hours, and the survival rate gradually increased; The status of larvae was similar; the vigor state of larvae in the salinity 30-40 salinity gradient group decreased gradually with the increase of salinity, but the survival rate was the same as that of the salinity 25 and 30 gradient groups. (2) Within 24 to 48 hours, all the larvae in the salinity 0, 5, and 10 salinity gradient groups died; 60% of the larvae in the salinity 15 gradient group sank to the bottom, although they sur...

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PUM

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Abstract

The invention discloses a large-scale seed cultivation method for Yellow Sea gadus macrocephalus, and belongs to the technical field of aquiculture seed cultivation. The seed cultivation method comprises steps of temperature adjust and control cultivation, salinity adjust and control cultivation and inflation adjust and control in swim bladder opening period; the temperature adjust and control: the water temperature is controlled at 6-9 DEG C in the whole cultivation period of the Yellow Sea gadus macrocephalus; the salinity adjust and control cultivation: the salinity is controlled at 20-35 L / h / m<3> in the whole cultivation period of the Yellow Sea gadus macrocephalus; the inflation adjust and control in swim bladder opening period: the inflation quantity in an inflation pool is at 20-30 L / h / m<3> during the swim bladder opening period of the Yellow Sea gadus macrocephalus fry; the swim bladder opening period of the Yellow Sea gadus macrocephalus fry is from the 37th day to the 42ed day. The large-scale seed cultivation method enables the seed survival rate to be about 50%.

Description

technical field [0001] The invention belongs to the technical field of aquaculture seed cultivation, and in particular relates to a large-scale seed cultivation method of yellow sea cod. Background technique [0002] Cod (Gadus macrocephalus), commonly known as cod, belongs to the cod family and the genus Cod. It is a cold-water species widely distributed along the North Pacific coast and is an important fish resource. In recent years, with the increasing market demand for aquatic products and continuous high-intensity fishing pressure, the output of yellow sea cod has declined sharply. Foreign (Japan, the United States, etc.) main researches on yellow sea cod include broodstock selection and breeding technology research, cod artificial hatching and seed breeding technology research, conventional disease prevention and control technology research in the seedling process, etc. analysis. There are few studies on cod in my country, mainly focusing on morphology, feeding habit...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 于道德姜云荣官曙光刘洪军刘名
Owner MARINE BIOLOGY INST OF SHANDONG PROVINCE
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