Method for increasing egg mass rate of giant freshwater prawns

A technology of Macrobrachium rosenbergii and PVC pipes, which is applied in the field of improving the oviposition rate of Macrobrachium rosenbergii, can solve problems such as uneven specifications, hatching of larvae, and retardation of female parental ovaries. The method is simple, low in cost, and improves parenthood Effects on Shrimp Survival Rate

Inactive Publication Date: 2019-04-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the ovary growth retardation of the female parent that occurs in the Macrobrachium rosenbergii culture process in the prior art, the female shrimp has a low egg holding rate, and the...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] A method for improving the oviposition rate of Macrobrachium rosenbergii, comprising the steps of:

[0022] (1) In a 12×4m aquarium, use a white cylindrical PVC pipe with a length of 30cm and an inner diameter of 12cm as an artificial fish nest, and place 48 of them at the bottom of the aquarium;

[0023] (2) Select 10-18cm in body length, complete appendages, swimming and lively Macrobrachium rosenbergii female broodstock, 12-25cm in body length, complete appendages, swimming and active Macrobrachium rosenbergii male shrimp, the ratio of male to female is 3:1, and a total of 600 fish , be placed in the aquarium of step (1);

[0024] (3) When the water temperature in the aquarium reaches 20°C, start to feed the bait, and slowly raise the temperature (1.5°C each time, once every 2 days) to 30.5°C, and the amount of bait to be fed is 4% of the weight of the shrimp , the bait consists of 5% immune enhancer (composed of 20 parts of mucopolysaccharide, 30 parts of a mixture...

Embodiment 2

[0026] A method for improving the oviposition rate of Macrobrachium rosenbergii, comprising the steps of:

[0027] (1) In a 12×4m aquarium, use 20cm long and 10cm inner diameter white cylindrical PVC pipes as artificial fish nests, and place 50 of them at the bottom of the aquarium;

[0028] (2) Select body length 13.3-25.8cm, appendages are complete, swimming lively Macrobrachium rosenbergii broodstock, sex ratio 3:1, count 600 tails, be placed in the aquarium of step (1);

[0029] (3) When the water temperature in the aquarium reaches 20°C, start feeding the bait, and slowly raise the temperature (2°C each time, raise the water temperature every 2 days) to 32°C, the amount of bait fed is 4% of the shrimp weight , the bait consists of 3.5% immune enhancer (composed of 20 parts of mucopolysaccharide, 30 parts of a mixture of Radix Radix and Astragalus polysaccharide in a weight ratio of 1:1 and 10 parts of egg yolk immunoglobulin) and 96.5% of the basic Feed composition, the ...

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Abstract

The invention relates to a method for increasing the egg mass rate of giant freshwater prawns. The method comprises the following steps: by taking a columnar PVC tube as an artificial fish nest, transversely placing the PVC tube at the bottom of a breeding container, wherein the PVC tube is 15-30 cm long and has an inner diameter of 4-15 cm; putting prawns which are 10 cm or longer, have completelimbs and swim actively as parents into the breeding container; when the water temperature is 20 DEG C, feeding the prawns, and slowly heating to 28-34 DEG C, wherein the feeding amount accounts for 3-8% of a prawn weight, and the feed comprises 2-8% of an immunopotentiator and 92-98% of a basic feed; feeding twice per day in the morning and at night, and feeding for 40-60 days. By adopting the method, the problems that female parents are slow in growth speed, high in death rate, slow in ovary development and low in egg mass rate in the conventional giant freshwater prawn breeding process canbe effectively solved. The method provided by the invention is simple and low in cost, the survival rate of parent prawns can be greatly increased, and the egg mass rate of the giant freshwater prawnscan be increased to 80% or greater.

Description

technical field [0001] The invention relates to a method for increasing the oviposition rate of Macrobrachium rosenbergii, belonging to the technical field of aquaculture. Background technique [0002] Macrobrachium rosenbergii (Macrobrachium rosenbergii), also known as Malaysian prawns and freshwater long-armed prawns, belongs to the subclass Molecula, Decapod, Parade, Macrobrachidae, and the genus Macrobrachium. It is a large freshwater shrimp native to Southeast Asia. It has the advantages of fast growth, wide appetite, good meat nutrition, and short breeding cycle. Since the artificial cultivation of Macrobrachium rosenbergii began in the 1960s, it has developed rapidly, and it is more common to breed this shrimp in Southeast Asian countries and some other regions. my country has introduced this shrimp since 1976, and it has been cultivated in more than ten provinces, municipalities and autonomous regions such as Guangdong, Guangxi, Hunan, Hubei, Jiangsu, Shanghai, and...

Claims

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Application Information

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IPC IPC(8): A01K61/59A23K50/80A23K20/163A23K10/30A23K20/147
CPCA23K10/30A23K20/147A23K20/163A23K50/80A01K61/59Y02A40/81Y02A40/818
Inventor 赵卫红董学兴姜子俊欧江涛吕林兰於叶兵刘飞吕富
Owner YANCHENG INST OF TECH
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