Bait feeding method for improving survival rate of loach fries

A technology of bait feeding and survival rate, which is applied in the field of bait feeding to improve the survival rate of loach seedlings, can solve the problems of low survival rate of loach seedlings, and achieve the effects of rapid growth, high economic benefits, and rapid weight gain

Pending Publication Date: 2020-03-17
SUQIAN AGRI SCI RES INST JIANGSU ACAD OF AGRI SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem of low survival rate of loach seedlings proposed in the background technology, the present invention researches and designs a kind of bait feeding that improves the survival rate of loach seedlings by mastering the optimal feeding density of bait, the optimal bait conversion time and the way of adding. Method, its purpose is to: provide a kind of loach seed bait throwing and feeding method that body weight increases fast, grows rapidly, and seed survival rate is high

Method used

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  • Bait feeding method for improving survival rate of loach fries
  • Bait feeding method for improving survival rate of loach fries
  • Bait feeding method for improving survival rate of loach fries

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1 (rotifer feeding density test)

[0027] Cultivation and collection of rotifers: Use a glass aquarium (50cm*40cm*27cm) for indoor cultivation of rotifers, wash the aquarium clean, add an appropriate amount of boiled water, and the water temperature is 25±1°C. The rotifer bait is chlorella pyrenoidosa, and it is fed twice a day, according to the amount of 300,000 cells of chlorella that a rotifer ingests per day, and the amount of bait can be adjusted according to the water color. After each feeding, stir gently to increase the dissolved oxygen in the water. After 3-5 days of cultivation, the density of rotifers reaches 100-200 / mL, which can be collected for future use. Use 80-100 mesh sieves to make small-capacity net cages, fix the net cages with wooden frames, and tie them tightly. Put the net cages on a plastic bucket, use siphon method to suck out the pool water, flow into the net cages for filtration, and carry out wheeling. Worm collection.

[0028]...

Embodiment 2

[0034] Example 2 (Live bait optimal time conversion test for larvae)

[0035] The experiment was divided into 5 groups (A~E), each group was set up 3 parallel, and 30 fish were placed in each box. Different conversion time treatment: 3rd, 6th, 9th, 12th day after hatching. The test time was 12 days in total, and the animals were fed once every day at 8: 00-9: 00 and 17: 00-18: 00, and the amount of feeding was slightly surplus. Use the siphon method to suck out the feces, residual bait, dead seedlings and other dirt in the aquarium every afternoon, and change the water at the same time. The amount of water changed each time is about 1 / 4 to 1 / 3 of the total water volume, and the temperature difference of the water does not exceed ±1°C , the survival rate of loach larvae fed Artemia at different post-hatching times is shown in Table 2 and figure 2 shown.

[0036] Such as figure 2As shown, the survival rate of loach larvae in different treatment groups: 3DPH0.05). The 3DPH...

Embodiment 3

[0041] Example 3 (Test of switching from live bait to compound feed)

[0042] The experiment was divided into 5 groups (A~E), each group was set up 3 parallel, and 30 fish were placed in each box. Different conversion time treatment: 16th, 18th, 20th, 24th, 30th day after hatching. The test time was 34 days in total, and the animals were fed once every day at 8:00-9:00 and 17:00-18:00, and the amount of feeding should be slightly surplus. Use the siphon method to suck out the feces, residual bait, dead seedlings and other dirt in the aquarium every afternoon, and change the water at the same time. The amount of water changed each time is about 1 / 4 to 1 / 3 of the total water volume, and the temperature difference of the water does not exceed ±1°C , the growth and survival rate of loach larvae at different conversion times from live bait to compound feed are shown in Table 3 and Figure 5 shown.

[0043] Table 3 The growth of loach larvae under different conversion times from ...

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Abstract

The invention discloses a bait feeding method for improving survival rate of loach fries, which includes the following steps: (1) feeding a primary bait; (2) feeding a live bait instead of the primarybait step by step; and (3) feeding an artificial compound feed instead of the live bait. The bait feeding method for loach fries greatly improves the survival rate and growth rate of loach fries. Thesurvival rate of feeding rotifers reaches more than 70% in a primary feeding period of loach larvae; amylase activity of loach larvae is increased significantly after fairy shrimps are fed instead ofthe rotifers; and the trypsin activity of young loaches is increased significantly after the artificial compound feed is fed instead of the fairy shrimps, with the survival rate reaching more than 60%. According to the method, the growth and weight gain are rapid, and economic benefits are higher.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a bait feeding method for improving the survival rate of loach fry. Background technique [0002] loach( Misgurnus anguillicaudatus ), belongs to Cypriniformes (Cypriniformes), Loach family (Cobitidae), flower loach subfamily (Cobitinae), loach genus, its meat is rich in minerals and vitamins and has high edible value and nutritional value, and also It has good medicinal value and is known as "ginseng in water". Because of its advantages such as low breeding cost, easy bait, strong environmental adaptability, few diseases, easy breeding, and high survival rate, it is also listed as a special and excellent economic breeding species for aquatic products. In China, scientific researchers have done systematic research on the growth of loach, artificial reproduction, embryo and juvenile development, and seed cultivation. However, the survival rate of loach seedlings...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 覃宝利王宣朋单金峰丁辰龙
Owner SUQIAN AGRI SCI RES INST JIANGSU ACAD OF AGRI SCI
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