Method for determining individual food intake of fish

A measuring method and technology of food intake, which are applied in the directions of measuring devices, instruments, scientific instruments, etc., can solve the problems of large errors, inconvenient operation, affecting fish intake, etc., and achieve the effect of small errors and easy operation.

Inactive Publication Date: 2012-11-21
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved: the present invention aims at the shortcomings of radioactive hazards, inconvenient operation, difficult mixing, large errors, and affecting fish feeding in the prior art of measuring fish individual food intake, and provides a method for measuring fish individual food intake. Quantitative methods can overcome the above disadvantages

Method used

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  • Method for determining individual food intake of fish

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1 A kind of method of measuring fish individual food intake comprises the following steps:

[0018] (1) Sieve metal particles with 40 mesh and 50 mesh traditional Chinese medicine to obtain 12g of metal particles with a diameter of about 0.25mm;

[0019] (2) Stir and mix the metal particles obtained in step (1) with conventional feed materials, and then prepare pellet feed through a small feed pellet machine to obtain feed for X-ray machine detection.

[0020] (3) Randomly take 500 grains of feed containing metal particles, divide them into 10 groups, weigh the weight of each group of feed, the average weight of each group of feed is 5.5g, use an X-ray machine to detect the metal particles of each group of feed, and the average weight of each group of feed contains 48 metal granules, converted into 1 metal granule per 0.115g feed.

[0021] (4) Feed the experimental fish with the prepared metal-containing pellet feed. After 2.5 hours, use an X-ray machine to ...

Embodiment 2

[0023] Example 2 A method for measuring the food intake of individual fish. The difference from Example 1 is that the feed containing metal particles prepared in step (3) contains about 1 metal particle per 0.1-0.122g of feed.

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Abstract

The invention aims at the shortages of radiological hazards, inconvenience in operation, uneasiness in mixing, large errors and influences on fish feeding and the like existing in the prior art for determining individual food intake of fish, and provides a method for determining the individual food intake of fish. The specific scheme is as follows: mixing metal particles the diameters of which are about 0.25 mm after screening and conventional feeds according to a certain proportion to prepare a feed containing the metal particles, feeding the feed to experimental fish, detecting the fish body by an X-ray machine after the feed is sucked by the gastrointestinal tract of the fish, and indirectly determining the food intake of the fish according to the number of the metal particles. The method provided by the invention is without radiological hazards, simple and convenient to operate, smaller in errors, and free from influences on fish feeding; the metal particle indicators are discharged completely within 24 hours, and the fish is not injured. A foundation for studying utilization efficiency of fish feeds is laid by the method.

Description

technical field [0001] The invention belongs to the technical field of feed preparation, and in particular relates to a method for measuring individual fish food intake. Background technique [0002] In the aquaculture industry, the feed cost accounts for more than 50% of the aquaculture cost, and the fish pond aquaculture is even worse, and the feed cost accounts for more than 90%. Improving the feed efficiency of farmed animals can firstly reduce the aquaculture cost; secondly, it can reduce the competition between animals and humans for food Finally, animals with high feed utilization efficiency are less polluted to the environment than animals with low feed efficiency. The economic benefits brought by improving feed efficiency will be far higher than those brought by simply increasing weight gain. Therefore, breeding new breeds with fast growth and high feed efficiency will definitely become a new development direction for breeding. In livestock and poultry, residual fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00
Inventor 俞菊华唐永凯李建林李红霞董在杰
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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