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Method for simple and rapid removal of tilapia invading aquaculture pond

A tilapia and pond technology, which is applied in fish farming, application, climate change adaptation and other directions, can solve the problems of no simplicity and effectiveness, small individuals, and small results, and achieve the effect of reducing feed loss and avoiding attacking juvenile fish.

Inactive Publication Date: 2015-01-07
GUANGDONG INST OF APPLIED BIOLOGICAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of changing water in aquaculture ponds, it is easy to mix wild tilapia from the river. It is small in size, early in sexual maturity, inconsistent in size, and has no economic value, but there is no simple and effective way to remove it. Time-consuming and labor-intensive, and with little effect, therefore, there is an urgent need for a method that can specifically kill tilapia without affecting the economical fish cultured in ponds

Method used

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  • Method for simple and rapid removal of tilapia invading aquaculture pond

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Experimental program
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Effect test

Embodiment 1

[0012] Determination of the half-lethal dose (LC50) of methapon to tilapia within 24 hours.

[0013] The half-lethal dose was determined according to the methods of GB / T 13267-91 and SC / T 1087.1-2006. The same batch of healthy tilapias of the same age were purchased from the fish farm, with an average body length of 6.03cm, a total length of 7.47cm, and an average weight of 7.00g. They were kept in the fish tank for a week without death. Configure a series of concentrations of dimethadin solution, put into tilapia, measure the mortality rate of tilapia within 24h, adopt the linear interpolation method to estimate LC50, as shown in table 1, the results show that dimethadon has no effect on tilapia within 24h. The LC50 of non-fish is 0.0172ppm.

[0014] Table 1 Determination of the half-lethal dose of methapon to tilapia.

[0015]

Embodiment 2

[0016] Embodiment 2: In the fish tanks of grass carp and crucian carp, use 0.04ppm methapon to remove tilapia.

[0017] The tilapia used in this experiment has an average body length of 6.22cm, an average full length of 7.57cm, and an average weight of 7.35g. Grass carp has an average body length of 8.75cm, an average full length of 10.7cm, and an average weight of 12.08g. All were temporarily raised in fish tanks for a week to adapt to the environment. In the evening, add 9.3 μl of 40% methaphos emulsifiable concentrate (produced by Zhejiang Heben Technology Co., Ltd.) into 93L water body and mix evenly (that is, the final concentration of methaphos is 0.04ppm), stop oxygenation, stop feeding, 24h The mortality rate of tilapia was 100%, while the mortality rate of grass carp and crucian carp was 0, and there were no obvious symptoms of poisoning. The dead tilapia were fished out in time, and after 24 hours, the oxygen was continuously increased for one day, and the grass car...

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Abstract

The invention discloses a method for simple and rapid removal of tilapia invading an aquaculture pond. The method is killing tilapia in an aquaculture pond by putting methidathion into the aquaculture pond without affecting other commercial fishes. The method for simple and rapid removal of the tilapia invading the aquaculture pond has the advantages of being capable of easily and effectively removing the tilapia invading during the aquaculture of grass carp, dace, fancy carp and the like without affecting the aquaculture of the grass carp, the dace, the fancy carp and the like, thereby reducing feed loss and avoiding the attacking of the tilapia to juvenile fishes.

Description

Technical field: [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for simply and quickly removing tilapia intruding into a culture pond. Background technique: [0002] Tilapia, also known as African crucian carp and apple fish, is a small and medium-sized fish native to Africa and belongs to the tropical fish of the family Cichlidae. It has strong adaptability, large food intake, fast growth, and disease resistance. Strong force, low oxygen resistance, early sexual maturity, short spawning cycle, low requirements for breeding conditions, and large egg production. Once invaded into the breeding pond, it will reproduce rapidly, grab feed, attack and even prey on the fish in the breeding pond. Juvenile fish, causing significant economic losses. In the process of changing water in aquaculture ponds, it is easy to mix wild tilapia from the river. It is small in size, early in sexual maturity, inconsistent in size, and has no economi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81A01K61/00
Inventor 江海英陈金平李林秒张秀娟
Owner GUANGDONG INST OF APPLIED BIOLOGICAL RESOURCES