JPH0560332B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a high moisture solid feed for fish farming. [Prior Art] Conventionally, in marine aquaculture of yellowtail, sea bream, flounder, etc., a method has been adopted in which coarsely crushed frozen or thawed raw bait is administered into the sea. However, this method had some drawbacks. Firstly, there is a problem in that the liquid containing the active ingredient flows out between administration and feeding, reducing the quality of the live bait.Secondly, there is a problem in which the quality of the live bait deteriorates. This caused problems such as contamination of the fish, causing diseases and poor growth of the fish. Therefore, in recent years, high-moisture solid feeds have come to be used to solve these problems. This high-moisture solid feed is made by coarsely crushing highly caught fish such as sardines and saury (usually frozen products), and mixing it with powdered feed such as fishmeal, soybean meal, and a binder. It is granulated into pellets. Therefore, it becomes poorly soluble in water and can prevent the component from flowing out into seawater. As the binder, sodium carboxymethylcellulose (CMC), sodium alginate, carrageenan, guar gum, xanthan gum, etc. are used. [Problems to be Solved by the Invention] High-moisture solid feed can generally be granulated by mixing frozen live feed at a ratio of 50 to 60% by weight based on the total weight of the feed. However, in the case of this mixing ratio, feeding properties are poor especially for yellowtail and the like, and growth is also poor. Therefore, it is desired to perform granulation with a raw bait blending ratio higher than 60%, but in this case, with conventional technology, the moisture content increases, so each particle after granulation does not stand alone, and the whole As a result, it became a large sticky block, making it difficult to cast the bait. Furthermore, even if the granulated particles are still frozen and each granule is loose, they will thaw as soon as they are thrown into the sea, the particles will disintegrate, and the raw food and fishmeal that are their ingredients will be lost. There was a problem that they were scattered all over the ocean. This is because the combination ratio of live bait is high, so it cannot maintain its shape in water. Therefore, the purpose of the present invention is to increase the mixing ratio of raw bait to 60%.
As mentioned above, it is a high moisture solid that has good shape retention, grains do not stick together even when the raw bait is slightly thawed, and it does not disintegrate easily even in water and maintains its granular shape, making it easy to feed. The goal is to provide feed. [Means for Solving the Problems] The present invention provides (A) wheat flour or a mixture of wheat flour and flour with an ash content of 2.0% by weight or more, or (B) α
It is made by mixing and granulating a raw material selected from a mixture of pregelatinized wheat flour or pregelatinized wheat flour with an ash content of 0.7% by weight or more, raw bait, powdered fish feed, and a binder. A fish feed containing 2 to 7% of the raw material based on the total weight of the fish feed,
The fish feed is characterized in that it contains 60 to 80% of the raw feed and 0.5% or more of the binder. In this specification, live bait refers to sardines, saury,
It refers to fish that are often caught, such as kounago, mackerel, and shrimp, and are crushed using a crusher. Powdered fish feed is mainly composed of fish meal, soybean meal, feed yeast,
Refers to products containing vitamins, minerals, etc. In order to achieve the above object, the present inventors
We conducted research by adding various additives to conventional high-moisture solid feed, and as a result, we found that by adding these ingredients, it is possible to maintain shape retention even when 60% or more of live feed is added. I was able to get fodder for my invention. Flour or a mixture of flour and flour with ash content
If less than 2.0% by weight, or a mixture of pregelatinized wheat flour or pregelatinized wheat flour with an ash content of less than 0.7% by weight is used in the present invention, the grains of the feed will become sticky, stick to each other, crumble, etc. do. Regarding the mixing ratio of each component, first, raw bait is mixed at a ratio of 60 to 80% of the total weight. If the blending ratio of raw bait is less than 60%, feeding properties are poor, and if it exceeds 80%, granulation becomes difficult and shape retention cannot be maintained. The raw material having the above-mentioned properties accounts for 2-7%, preferably 3.5% based on the total weight.
Add ~5.5%. If it is less than 2%, the effect is insufficient, and if it is more than 7%, the adhesion will be strong and the grains will stick to each other and will not fall apart. Binder is 0.5% or more, preferably 0.5-2.5% based on the total weight
Blend. Next, in carrying out the present invention, the mixing and granulation of the above-mentioned components are carried out using known high-moisture solid feeds, such as those described in Japanese Patent Publication No. 57-46350 and Japanese Patent Application Laid-open No. 60-102150. It can be carried out by the manufacturing method of In other words, the powdered feed is made by adding soybean meal, feed yeast, vitamin mixture, mineral mixture, etc. to fish meal, and to this is added the above-mentioned amount of a binder such as sodium carboxymethylcellulose (CMC) or sodium alginate. and mix. Live bait can be obtained by crushing sardines, saury, etc., usually in a frozen state, using a crusher. Pregelatinized wheat flour can be obtained by adding water to wheat flour, extruding it by heating and pressurizing it with an extruder, and then drying and pulverizing it. Next, a mixture of powdered feed and a binder, and wheat flour or a mixture of wheat flour and 〓, or a mixture of pregelatinized wheat flour or pregelatinized wheat flour and 〓 are added to the obtained raw feed, mixed with a mixer, and then extruded with a granulator. The feed for fish farming of the present invention can be obtained by forming the feed into pellets or the like. [Effects of the invention] The fish feed of the present invention has a raw feed ratio of 60%.
Even if the amount is larger, the shape retention of the grains is good, there is no stickiness, and there is little adhesion between grains. It also has good shape retention in water. Therefore, they do not pollute seawater and have good feeding properties. [Example] Hereinafter, the present invention will be explained in more detail with reference to Examples. First, flour was added with water and extruded by heating and pressurizing with an extruder, followed by drying and pulverization to obtain pregelatinized flour having various ash contents. Next, 213 kg of fish meal, 17 kg of soybean meal, 10 kg of feed yeast,
Vitamin Mixture 6Kg, Mineral Mixture 3Kg, Carboxyl Methyl Cellulose Sodium (CMC)
A powdered feed mixture was obtained by mixing 6 kg. Frozen anchovies were crushed in a frozen state using a crusher to obtain frozen crushed live bait. A mixture of the above-mentioned raw materials and flour having various ash contents and 〓 with the compounding ratio shown in Table 1 was mixed with a mixer, extruded with a granulator with a die diameter of 8 mm, and molded into pellets. Fish feeds of Comparative Examples 1 to 4 and Comparative Examples 1 to 5 were obtained. Next, the fish feeds of Examples and Comparative Examples were left in a constant temperature bath at 32°C maintained at high temperature and high humidity for 2 hours, and the physical properties of the feeds before and after treatment were examined, and the results are shown in Table 1. . As a result, the feeds of Examples 1 to 4 were not sticky and had excellent shape retention, whereas the feeds of Comparative Examples 1 to 5 had poor shape retention, or the grains were sticky and fell apart. It didn't happen. In Table 1, all percentages are by weight.
The ash content is determined by flour or a mixture of wheat flour and gelatinized wheat flour or gelatinized wheat flour and
It represents the ratio of the mixture to the weight of the mixture. Unless otherwise specified, other percentages represent the ratio to the total weight of the fish feed of the present invention.

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【table】

Claims (1)

[Scope of Claims] 1 (A) Wheat flour or a mixture of wheat flour and ⓓ with an ash content of 2.0% by weight or more, or (B) Pregelatinized wheat flour or a mixture of pregelatinized wheat flour and ⓓ with an ash content of
A fish feed prepared by mixing and granulating a raw material selected from 0.7% by weight or more, raw bait, powdered fish feed, and a binder, wherein the total weight of the fish feed 2 to 30% of the raw material
Contains 7%, contains 60-80% of the raw bait, and contains the binder.
The fish feed is characterized by containing 0.5% or more.