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Artificial fry collecting method for buried living type mud flat shell-fish

A technology for picking seedlings and tidal flats, which is applied in application, climate change adaptation, fish farming and other directions to achieve the effects of reducing production costs, improving survival rate, improving seedling picking rate and production efficiency

Inactive Publication Date: 2004-12-22
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the method of putting in artificial attachment bases and picking seedlings commonly used in buried living tidal flat shellfish at present, the purpose of the present invention is to provide a method that can realize high efficiency, safety, and no attachment in the process of full artificial cultivation of healthy seedlings. The basic method of artificial seedling harvesting suitable for buried tidal flat shellfish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment does not use artificially simulated ecological attachment bases such as sand and mud, and uses the smooth and non-toxic bottom surface of the seedling pool to make the metamorphic larvae of tidal flat shellfish naturally settle in the shallow water layer and attach to the bottom plane of the seedling pool to complete the metamorphosis, and then Develop into juvenile shellfish; Among them: the seedling pool used for seedling collection is made of cement material, the inner wall is coated with smooth and non-toxic magnetic enamel paint, and the bottom of the pool is provided with a slope of 5 degrees towards the water outlet;

[0019] The operation steps are as follows: into the seedling pool, pass sand-filtered, cleaned, cultivated seawater to remove pathogenic organisms such as protozoa, bacteria, and organic particles, and then artificially cultivate planktonic larvae of Philippine clam with a shell length of 160-180 μm or more. Throw it into the seedlin...

Embodiment 2

[0026] The difference from Example 1 is:

[0027] The seedling pool used for picking seedlings is made of a mixed material (glass fiber reinforced plastic) of epoxy resin and glass fiber, and the bottom of the pool is provided with a slope of 3 degrees towards the water outlet;

[0028] In the operation steps: put the planktonic larvae of Philippine clams in the seedling pool at a density of 10 grains / ml, feed golden algae and diatom bait, and feed once every 6 hours, and the daily feeding amount is 100,000 to 120,000 Cells / ml, inflated, for initial seedling cultivation; when 40% of the planktonic larvae in the seedling pond begin to shrink and axons grow out, prepare for seedling harvesting conditions: the water depth is 1.5 meters, and the light is 500lux; implement seedling harvesting , let the larvae in the metamorphosis process settle and adsorb to the smooth bottom surface of the seedling pool. The seedling time lasts for 5 days. Feed 120,000 cells / ml of golden algae or...

Embodiment 3

[0033] The difference from Example 1 is:

[0034] Using 20% ​​mud + 80% sand as a control, compare the seedling density, seedling survival rate and growth rate of the two seedling picking methods within one week after attachment and metamorphosis. The results are shown in Table 3.

[0035] Table 3 embodiment 3 and the seedling picking density,

[0036] test group

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PUM

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Abstract

The invention discloses a method for artificially harvesting seedlings suitable for buried living tidal flat shellfish. It does not use artificially simulated ecological attachment bases such as sand and mud, and uses the smooth and non-toxic bottom surface of the pool to allow the metamorphosis larvae to settle naturally and attach to the bottom plane of the seedling pool, complete metamorphosis, and then develop into seedlings; specifically: in the seedling collection The pool is fed with seawater for cultivation, and the planktonic larvae are put into the seedling pool with a density of 3 to 10 grains / ml, and the bait is fed and inflated to carry out initial seedling cultivation; Pick seedlings when the feet grow out, let the larvae settle and adsorb to the smooth bottom surface of the seedling pool for 3 to 5 days, and reduce the amount of inflation to not cause the water to roll over, and replace the seawater every 1 to 2 days; The density of seedlings on the surface of the bottom of the pool can reach 2.6-3.9 million grains / m2; the seedlings attached to the surface of the bottom of the pool after 2-3 days of metamorphosis are collected and transferred to the middle of the seedlings for cultivation. The invention has the characteristics of high efficiency, safety and convenient management of seedlings.

Description

technical field [0001] The invention relates to the artificial seedling picking technology of tidal flat shellfish, and in particular provides an artificial seedling picking method suitable for buried life type tidal flat shellfish. Attach metamorphosis, realize efficient and safe artificial seedling picking. Background technique [0002] The artificial seedling picking method is an important method link in the artificial seedling raising method of tidal flat shellfish such as Philippine clams. Philippine clam Ruditapes philippinarum (Adams et Reeve) is a species distributed worldwide, and it is distributed in coastal waters from south to north in China. Adults over 2 years old have a shell length of 2.5-4.5 cm. The shell is oval and swollen. The left and right shells are equal. The shell surface has relatively smooth concentric growth lines centered on the top of the shell. The Philippine clam is a buried living shellfish, which likes to live in the tidal flat substrate w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 张国范阙华勇刘晓阎喜武
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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