Method for increasing industrial breeding yield of tegillarca granosa

A kind of industrialization and mud cockle technology, applied in the direction of climate change adaptation, fish farming, application, etc., can solve the problems of slow growth of mud cockles, seedling death, and inability to filter out, so as to increase production, increase attachment rate, and improve growth speed effect

Active Publication Date: 2013-11-20
福建省大来种苗科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

In the conventional nursery process of mud cockles today, the only way to remove harmful zooplankton in the water body is to change the water or turn over the pond, but these routine operations can only filter out zooplankton whose individual size is smaller than cockle larvae. The zooplankton of the Brachion rotifers, whose individual size is close to or even larger than the planktonic larvae of mud cockles, cannot be filtered out by conventional operations
After the cockles attach, due to the rich content of organic matter in the water body, many parasitic protozoa such as polycontractors, bell worms, nematodes, etc. often adhere to the shells of the cockles, and their large-scale reproduction directly affects the cockles. The feeding and activities of the seedlings cause the cockles to grow slowly, and in severe cases, the seedlings will die. However, at present, the normal cleaning of the pool cannot effectively remove these parasites attached to the shells of the cockles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In May 2013, planktonic larvae of mud cockles were cultivated in 4 cement ponds of 8.5×3.5×1.0m (length×width×depth) continuously filled with air in Zhangzhou Baozhi Aquatic Technology Co., Ltd., Fujian Province. During cultivation, natural seawater with a salinity of 20 is sand-filtered into the pond, the density of cockle larvae is kept at 70-80 / 10mL, the water temperature is kept at 27-28°C, and the pond is turned every 2 days. On the 4th day, when the cockles were 140 μm in size, Brachionus rugosa rotifers with a size of 130-170 μm were found in the water body. On the 5th day, use a 1mL dropper to randomly take 10mL of cultured seawater in the pool into a 10mL cone-bottomed measuring cylinder, add 1 drop of iodine, and let it stand for 10 minutes. Both the cockle seedlings and rotifers sink to the bottom of the measuring cylinder, and take them out under the microscope with a straw. Counting was performed 3 times in each pool, and the average value was taken. The av...

Embodiment 2

[0027] In May 2013, the planktonic larvae of mud cockles were cultured in a cement pond of 8.5×3.5×1.0m (length×width×depth) continuously filled with air in Zhangzhou Baozhi Aquatic Technology Co., Ltd., Fujian Province. When cultivating, the natural seawater with a salinity of 20 is sand-filtered into the pool, and the sea mud dried at 200°C and filtered through a 200-mesh nylon sieve is added to make the sea mud at the bottom of the pool 1-2mm thick, and the water temperature is maintained. 27-28°C.

[0028] Observed under the microscope 5 days after the cockle was attached, the average size of the cockle spat was 0.35mm, and almost every seedling had 1-2 bundles of polyshinites and flocculent adherents on the outside of the shell. The shell was opaque, and the outer layer seemed to have a Covered with a layer of yellow bacterium, the seedlings move slowly, and the appendages are weak in stretching and contracting. Wash out the attached seedlings with water in the pond, and...

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PUM

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Abstract

The invention relates to a method for increasing an industrial breeding yield of tegillarca granosa by acid treatment. Particularly, when a pool is turned over during a floating stage of the tegillarca granosa, hydrochloric acid with a certain concentration is added for treatment, and the vast majority of harmful zooplankton is removed, so that an adhesive rate of tegillarca granosa seedlings is increased; when the pool is turned over during an adhesive stage, hydrochloric acid with a certain concentration is added for the treatment, and parasite and other dirt adhered to a shell are removed, so that a growth rate of the larval tegillarca granosa is increased; and therefore, the industrial breeding yield of the tegillarca granosa is increased greatly.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a method for improving the output of cockles industrialized seedlings by using acid treatment, specifically, when the pool is turned over at a certain stage of the cockles industrialized seedlings, hydrochloric acid is used to remove harmful zooplankton and Parasitic protozoan, in order to reach the method for improving the yield of cockle seedlings. Background technique [0002] Mud clam (Tegillarca granosa), belonging to the phylum Molluscs, class Bivalva, order Dendonta, family Cranaceae, genus Cranosa, is a traditional cultured shellfish in the southeast coast of China. Since the 1990s, due to the deteriorating offshore environment, the natural seed resources of mud cockles have become increasingly scarce, and now the seeds needed for mud cockle farming are entirely from artificial cultivation. [0003] The industrial artificial breeding of cockles is mainly divided into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 孟灵瑄徐继林徐善良郑立洋周海波严小军
Owner 福建省大来种苗科技有限公司
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