JPS61146155A - Feed for raising fish - Google Patents

Abstract

PURPOSE:A feed for raising fish, prepared by adding a very small amount of selenium thereto, and capable of giving good raising results without using a large amount of fish meal. CONSTITUTION:A feed for raising fish obtained by adding 0.1-1.0ppm selenium, e.g. selenious acid or selenic acid, to a feed raw material for raising fish, e.g. fish meal, defatted soybeans, vitamins or minerals.

Description

DETAILED DESCRIPTION OF THE INVENTION C. Industrial Field of Application The present invention relates to a selenium-added fish feed, and more particularly to a selenium-added fish feed that is highly effective when a large amount of fishmeal is not used.

C. Prior Art Conventionally, fish feed has often used animal materials, such as fish meal and meat meal, which are more nutritious than plant materials.

However, animal raw materials such as fish meal and meat meal have a higher content of minerals such as calcium and phosphorus than vegetable raw materials.
When fish feed containing a large amount of these ingredients is fed to farmed fish, a large amount of phosphoric acid compounds are discharged into the breeding water, contributing to eutrophication of lakes. Currently, there is a desire to develop fish feed containing a large amount of vegetable materials with low mineral content.

[Problem that the invention seeks to solve]

The inventors of the present invention have conducted extensive studies on the development of fish feed that is mainly made from plant materials with low mineral content, determined the required amounts of amino acids, fatty acids, vitamins, and minerals of farmed fish, and determined how to satisfy each component. Under the following conditions, the amount of animal material in the feed was 0.5°10, '20. and 35.93
%, and conducted a fish rearing test, and found that the lower the amount of animal material in the feed, the poorer the rearing results.

Test Example After grinding and mixing the raw materials in the proportions shown in Table 1, they were pelletized using a 4.5 m die in a pellet machine to obtain fish feeds A, B, C, D, and E.

Next, the above feed was fed to carp (20 per group, average weight 100 g) housed in a glass aquarium (30 x 60 x 45 cm), and a breeding test was carried out for 6 weeks at a water temperature of 25°C.

Table 1 Notes: Divitamins) Minerals as prescribed by IALVER: NaJPαm 2000mg, NaC150
0g.

CaC0: + 1103.83 mg, Fe5On,
7Hz075 mg, znso4. '7H2゜13m
g, Mn5Os, 6Hz07mg+CuSO4,5
Hz01mg +Kl O, 13■, GoCI□, 6
The results of feeding the mixture on 1h00.04■ are shown in Table 2, and the lower the fishmeal content, the poorer the performance.

Table 2: In order to avoid contaminating the lakes and marshes where fish are raised, increasing the amount of plant material and decreasing the amount of animal material will result in poor fish breeding performance. There is a desire to develop feed that improves the

[Means to solve the problem]

The present invention is based on the results of various studies aimed at developing the fish feed mentioned above. o
The present invention was completed based on the finding that adding ppm improves the feed value, resulting in a fish feed with nutritional value equal to or higher than feeds containing a large amount of animal materials.

That is, in the present invention, selenium is added to the raw material for feed for fish farming from 0.1 to 0.1%.
To provide a feed for fish farming characterized by the addition of 1.0 ppm, the purpose of which is to provide a feed for fish farming that uses a large amount of vegetable materials with low mineral content and that improves breeding performance. There is a particular thing.

Various kinds of selenium can be used as the selenium used in the present invention, and for example, selenite, sodium selenite, potassium selenite, selenic acid, sodium selenate, potassium selenate, etc. are appropriately selected and used.

The fish feed of the present invention may be any feed material obtained by adding selenium to various feed materials.

Fish feed ingredients for adding selenium include animal ingredients such as fish meal, Antarctic krill meal, shrimp meal, fish soluble powder, and gelatin; defatted soybeans, yeast, defatted rice bran, corn gluten meal, alfalfa meal, and wheat flour. , wheat germ, wheat gluten, spirulina, chlorella, seaweed powder, and other plant materials; vitamins; minerals; flavors; pigments; and other antifungal agents, which can be selected and used as appropriate depending on the target fish species. can.

As a means of adding selenium to feed ingredients, it can be added at an appropriate time during the production process of fish feed, but in order to uniformly distribute selenium in fish feed, selenium must be added in an appropriate solid or liquid form. It is desirable to dilute it with a carrier before adding it.

As for the concentration of selenium added to feed materials, it is preferable to add it within the range of 0.1 to 1.0 ppn+, as the effect of adding it is less if it is too much, and the breeding performance will be poor if it is too much. .

The fish feed of the present invention is, for example, powdered, granular, pelleted,
It can be a crumple or other suitable shape.

The fish feed of the present invention is suitable as feed for eel, carp, trout, sweetfish, sea bream, yellowtail, etc., for example.

〔Effect of the invention〕

The feed of the present invention as described above contains a large amount of vegetable materials and a small amount of animal materials (although selenium is added), so even if these feeds are fed to fish, extremely good breeding results can be obtained. Not only is it useful, but it can also be used as a feed for fish farming that is mainly made of plant materials, so it has the effect of allowing fish to be cultured without discharging large amounts of minerals and the like into lakes and marshes.

〔Example〕

Next, examples of the present invention will be shown.

Example 1 Selenium in the proportion shown in Table 3 was added to the raw material with the blending ratio A shown in Table 1 of the test example in the form of sodium selenite, which was pulverized and mixed, and then mixed with a pellet machine for 4 .5 Fish feed made into pellets using Tsuru die A-1,
A-2, A-3, and A-4 were obtained.

Next, the above feed was fed to carp (20 per group, average weight 85 g) housed in a glass aquarium (30 x 60 x 45C1+), and a breeding test was carried out for 6 weeks at a water temperature of 25°C.

As a control, a feed produced in the same manner but without the addition of selenium was used as a control feed, and a group fed with the feed in the same manner was used as a control group.

Table 3

Claims (1)

[Claims] A fish feed characterized by adding 0.1 to 1.0 ppm of selenium to a fish feed raw material.