JP2024040663A - Materials for aquatic animal feed - Google Patents

Abstract

[Problem] To provide a feed material for aquatic animals that can be used as a substitute for fishmeal. [Solution] A feed material for aquatic animals containing the secretions of insects of the order Hyphae. [Selection diagram] None

Description

The present invention relates to materials for use as feed for aquatic animals.

In recent years, the price of fishmeal, which is the main component of feed for aquatic animals, has soared. Reasons for this include a decline in the catch of horse mackerel and sardines from South America, which are used as raw materials for fishmeal, and an increase in high-cost farmed fish due to global population growth. Therefore, fishmeal substitutes are needed. Examples of fishmeal substitutes include microalgae, single-cell protein, soybean oil cake, concentrated soy protein, malt protein, corn gluten meal, corn distillers' cake, rapeseed meal, meat meal, feather meal, blood meal, and sake lees. However, these fishmeal substitutes have a problem of low palatability to fish and low growth efficiency.

Patent Document 1 proposes the use of a material obtained by a method including blending brown algae with rice bran and culturing Aspergillus oryzae as a fishmeal substitute material. However, this material is obtained through bacterial culture using multiple raw materials and is expensive.

Japanese Patent Application Publication No. 2019-187405

An object of the present disclosure is to provide a feed material for aquatic animals that can be used as a substitute for fishmeal.

As a result of intensive research, the present inventors have found that the above-mentioned problems can be solved by using a feed material for aquatic animals that contains the secretions of insects of the order Hyphae. The present inventor conducted further research based on this knowledge and completed the present invention. That is, the present invention includes the following aspects.

Item 1. A feed material for aquatic animals containing the secretions of insects of the order Hyphae.

Item 2. Item 2. The material according to item 1, wherein the insect is an insect of the superfamily Fruitfly.

Item 3. Item 3. The material according to item 1 or 2, which contains feed for the insect.

Item 4. 4. The material according to item 3, wherein the insect feed contains a plant-derived fibrous feed.

Item 5. 5. The material according to any one of Items 1 to 4, wherein the insect is a larva.

Item 6. Item 5. The material according to item 5, which is the residue of breeding of the insect.

Section 7. Item 7. The material according to any one of Items 1 to 6, wherein the aquatic animal is a fish or a crustacean.

Section 8. Item 8. A method for producing the material according to any one of Items 1 to 7, comprising the steps of growing insects of the order Hyphae in feed and separating the insects from the feed.

Item 9. Feed for aquatic animals containing the material according to any one of Items 1 to 7.

Item 10. Item 9. The aquatic animal feed according to Item 9, wherein the content of the material is 0.5 to 30% by mass.

Item 11. A method for producing an aquatic animal, which comprises feeding the aquatic animal the feed for an aquatic animal according to Item 9 or 10.

According to the present disclosure, it is possible to provide a material for aquatic animal feed that serves as a fishmeal substitute, a method for producing the material, an aquatic animal feed containing the material, and the like.

1. Definitions In this specification, the expressions "contain" and "including" include the concepts of "containing,""including,""consisting essentially of," and "consisting only of."

As used herein, the expression "and/or" includes the concepts of both "and" and "or." That is, "A and/or B" includes the concepts of A alone, B alone, and a combination of A and B. Similarly, the expression "and/or" includes the concepts of both "and" and "or." That is, "A and/or B" includes the concepts of A alone, B alone, and a combination of A and B.

2. Feed material for aquatic animals In one embodiment, the present disclosure provides a feed material for aquatic animals (herein referred to as "feed material of the present disclosure") containing secretions of insects of the order Hyphae. ). This will be explained below.

Muscomorpha is a taxonomic group belonging to the suborder Diptera and Brachycera. In order of the order Hymenoptera, there are other orders besides the infraorder, Stratiomyomorpha, Xylophagomorpha, and Tabanomorpha; It is a different taxonomic group from the infraorder and the infraorder. The classification of the order Hymenoptera follows the Tree of Life Web Project (http://tolweb.org/) at the time of this application.

Specific examples of the infraorder include Cyclorrhapha, Nemestrinoidea, Asiloidea, and Empidoidea, with preference given to Cyclorrhapha. Can be mentioned. Specific examples of the ring suture group include Aschiza, Schizophora, and the like, and preferably Schizophora. Specific examples of the forehead capsule include Acalyptratae, Calyptratae, etc., and preferably Acalyptratae. Specifically, examples of the apterous subsection include Tephritoidea, Nerioidea, Diopsoidea, Conopoidea, Lauxanioidea, and Nerioidea. Sciomyzoidea, Opomyzoidea, Carnoidea, Sphaeroceroidea, Ephydroidea, etc., and particularly preferred is the family Opomyzoidea. Specific examples of the superfamily Tephritidae include Tephritidae, Ctenostylidae, Pallopteridae, Piophilidae, Platystomatidae, Pyrgotidae, Richardiidae, Ulidiidae, and particularly preferably the family Tephritidae. As the fruit fly family, Ceratitis is preferably mentioned, and Ceratitis capitata is particularly preferable.

Insects at each growth stage can be used. As insects, larvae, prepupae, pupae, adults, etc. can be used. The insect is preferably a larva.

The secretion is a substance excreted from insects of the order Infraorder, and is not particularly limited as far as it is concerned. Secretions are distinguished from the insects themselves or their processed products.

The feed material of the present disclosure preferably contains feed for insects of the order Hyphae (insect feed). The insect feed is not particularly limited as long as it is feed that allows insects (preferably larvae) of the order Infraorder to grow. The insect feed preferably contains a plant-derived fibrous feed. The plant-derived fibrous feed is not particularly limited as long as it is a plant-derived feed rich in fiber, and includes, for example, the epidermis and/or outer skin of seeds. Examples of the seeds include seeds of cereals such as wheat, barley, rice, sorghum, corn, oat, rye, and buckwheat, and preferably wheat seeds. Preferably, the plant-derived fibrous feed includes bran, and particularly preferably wheat bran. Other insect feeds that can be used include yeast or yeast extract, sugars, and the like. The saccharide is not particularly limited as long as it can be used as insect feed, and examples include monosaccharides or disaccharides such as sucrose, glucose, fructose, and trehalose, and oligosaccharides. Moreover, insect feed usually contains water so that the feed is suitable for raising insects.

When the insect feed contains plant-derived fibrous feed, the content is, for example, 5 to 40% by weight, preferably 10 to 25% by weight, based on 100% by weight of the insect feed.

When the insect feed contains yeast or yeast extract, the content is, for example, 3 to 30% by weight, preferably 8 to 20% by weight, based on 100% by weight of the insect feed.

When the insect feed contains saccharides, the content is, for example, 3 to 30% by weight, preferably 8 to 20% by weight, based on 100% by weight of the insect feed.

When the insect feed contains water, its content is, for example, 30 to 75% by weight, preferably 45 to 65% by weight, based on 100% by weight of the insect feed.

The insect feed can be one type alone or a combination of two or more types.

The feed material of the present disclosure is preferably a rearing residue of insects of the order Hyphae. Rearing residue is obtained through a process of growing insects of the order Infraorder in feed and separating the insects from the feed, and it contains the secretions of insects in the order of Infraorder and the feed of insects in the order contains.

Insects can be grown in feed according to or in accordance with known methods. Specifically, the growth of insects can be promoted, for example, by mixing insect eggs and/or larvae with insect feed and maintaining a suitable environment for a suitable period of time. Through this growing process, the insect ingests food, metabolizes it, and excretes secretions. The above environment and time can be set as appropriate depending on the type of insect.

Separation of insects is specifically the separation of insects from secretions excreted by the insects and the remains of food and other mixtures. The separation method is not particularly limited, and can be performed according to or analogously to a known method. If the larva has the property of jumping out of the feed and becoming a pupa, by continuing to grow it for a sufficient period of time, the larva will naturally jump out of the feed and the separation described above will be achieved.

The rearing residue may contain insects that could not be separated. The content of insects remaining in the rearing residue relative to 100 mass% of the rearing residue is, for example, 10% by mass or less, preferably 5% by mass or less, more preferably 2% by mass or less, still more preferably 1% by mass or less, and even more preferably is 0.1% by mass or less.

Preferably, the breeding material of the present disclosure contains protein. The lower limit of the protein content in the breeding material of the present disclosure is preferably 10% by mass, more preferably 15% by mass, even more preferably 20% by mass, and even more preferably 22% by mass. The upper limit of the protein content in the material is preferably 50% by mass, more preferably 40% by mass, and even more preferably 30% by mass. A range formed by arbitrarily combining the above-mentioned upper and lower limits is also mentioned as a preferable content range.

Preferably, the breeding material of the present disclosure contains crude fat. In this case, the lower limit of the crude fat content in the breeding material of the present disclosure is preferably 0.5% by mass, more preferably 1.0% by mass, even more preferably 1.5% by mass, and even more preferably 2.0% by mass. The upper limit of the crude fat content in the breeding material of the present disclosure is preferably 20% by mass, more preferably 10% by mass, and even more preferably 5% by mass. A range formed by arbitrarily combining the above-mentioned upper and lower limits is also mentioned as a preferable content range.

The breeding material of the present disclosure preferably contains crude ash. In this case, the lower limit of the crude ash content in the breeding material of the present disclosure is preferably 2% by mass, more preferably 3% by mass, even more preferably 4% by mass, and even more preferably 4.5% by mass. The upper limit of the crude ash content in the breeding material of the present disclosure is preferably 20% by mass, more preferably 15% by mass, even more preferably 10% by mass, and even more preferably 7% by mass. A range formed by arbitrarily combining the above-mentioned upper and lower limits is also mentioned as a preferable content range.

The breeding material of the present disclosure preferably contains soluble nitrogen-free substances. In this case, the lower limit of the content of soluble nitrogen-free substances in the breeding material of the present disclosure is preferably 20% by mass, more preferably 30% by mass, and even more preferably 40% by mass. The upper limit of the content of soluble nitrogen-free substances in the breeding material of the present disclosure is preferably 70% by mass, more preferably 60% by mass, and even more preferably 55% by mass. A range formed by arbitrarily combining the above-mentioned upper and lower limits is also mentioned as a preferable content range.

The breeding material of the present disclosure preferably contains crude fiber. In this case, the lower limit of the crude fiber content in the breeding material of the present disclosure is preferably 1% by mass, more preferably 2% by mass, even more preferably 3% by mass, and even more preferably 3.5% by mass. The upper limit of the crude fiber content in the breeding material of the present disclosure is preferably 20% by mass, more preferably 15% by mass, even more preferably 10% by mass, and even more preferably 7% by mass. A range formed by arbitrarily combining the above-mentioned upper and lower limits is also mentioned as a preferable content range.

The breeding material of the present disclosure preferably contains γ-aminobutyric acid (GABA). In this case, the lower limit of the content of γ-aminobutyric acid in the breeding material of the present disclosure is preferably 0.05% by mass, more preferably 0.1% by mass, even more preferably 0.2% by mass, and even more preferably 0.3% by mass. The upper limit of the content of γ-aminobutyric acid in the breeding material of the present disclosure is preferably 2% by mass, more preferably 1.2% by mass, even more preferably 0.8% by mass, and even more preferably 0.6% by mass. A range formed by arbitrarily combining the above-mentioned upper and lower limits is also mentioned as a preferable content range.

The content of the above components in the breeding material of the present disclosure is measured according to the method described in Production Example 1 below.

In addition to the above, the breeding material of the present disclosure contains minerals (e.g., sodium, phosphorus, iron, calcium, potassium, magnesium, copper, etc.) and amino acids other than γ-aminobutyric acid (e.g., arginine, lysine, histidine, etc.) as trace components. , phenylalanine, tyrosine, leucine, isoleucine, methionine, valine, alanine, glycine, proline, glutamic acid, serine, threonine, aspartic acid, tryptophan, cystine, etc.).

The rearing material of the present disclosure is a material mainly composed of secretions of insects of the order Infraorder, the secretions and plant-derived fibrous feed, or rearing residues. In the breeding material of the present disclosure, the content of secretions of insects of the order Hyphae, the total content of the secretions and plant-derived fibrous feed, or the content of breeding residue is preferably 80% by mass or more, More preferably 90% by mass or more, still more preferably 95% by mass or more, even more preferably 98% by mass or more, particularly preferably 99% by mass or more, particularly preferably 100% by mass.

The breeding material of the present disclosure is a material for use as feed for aquatic animals. Specifically, for example, the breeding material of the present disclosure can be used by being mixed with feed for aquatic animals. The target aquatic animals are not particularly limited as long as they can live in water. Examples of aquatic animals include fish, crustaceans, and shellfish. Among these, fish, crustaceans, etc. are preferred, and fish are more preferred. Specifically, the fish include, for example, sea bream, carp, trout, yellowtail, yellowtail, amberjack, amberjack, tuna, puffer fish, flounder, horse mackerel, mackerel, grouper, yellowtail, salmon, eel, catfish, sweetfish, char, eel, Examples include carp, sea bass, crucian carp, trout, yamame trout, smelt, goldfish, killifish, tilapia, sturgeon, and zebrafish. In one embodiment, the fish is preferably a saltwater fish. Examples of crustaceans include shrimp and crabs. More specifically, examples of the crustacean include vannamei shrimp, black shrimp, Japanese shrimp, white leg shrimp, and sea bream.

The breeding material of the present disclosure can preferably be used as an additive to improve the aquatic animal attractivity of aquatic animal feed or to improve the feed efficiency of aquatic animal feed. From this point of view, the present disclosure relates, as one embodiment, to an aquatic animal attraction improving agent for aquatic animal feed, a feed efficiency improving agent for aquatic animal feed, etc., which contain secretions of insects of the order Hyphae.

The breeding material of the present disclosure can be produced, for example, by a method that includes the steps of growing insects of the order Hyphae in feed and separating the insects from the feed. Details of the method are as described above.

3． Feed for Aquatic Animals As one embodiment, the present disclosure provides feed for aquatic animals (herein sometimes referred to as "feed of the present disclosure") containing the feed material of the present disclosure. This will be explained below.

The content (in terms of dry mass) of the feed material of the present disclosure in the feed of the present disclosure is not particularly limited, but is, for example, 0.5 to 50% by mass, preferably 0.5 to 30% by mass. From the viewpoint of feed attraction, feed efficiency, etc., the content is preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 4% by mass or more, even more preferably 8% by mass or more, especially The content is preferably 12% by mass or more, particularly preferably 16% by mass or more. The upper limit of the content can be, for example, 45% by mass, 40% by mass, 35% by mass, 30% by mass, or 25% by mass.

The feed of the present disclosure can contain materials that are mixed into feed for aquatic animals, if necessary.

The feed of the present disclosure can contain fishmeal and/or fishmeal substitute materials.

The fish meal is not particularly limited, and those obtained from various raw material fish can be used. Examples of raw material fish include sardines, walleye pollack, saury, herring, tuna, catfish, bluegill, black bass, and silverfish. Fishmeal can be obtained, for example, by heat-treating the raw material, drying it, and crushing it. The fishmeal may be used alone or in combination of two or more.

When the feed of the present disclosure contains fishmeal, the content of fishmeal (in terms of dry mass) in the feed of the present disclosure is not particularly limited, but is, for example, 0.1 to 80% by mass. The content is preferably 0.2 to 70% by weight, more preferably 0.5 to 60% by weight, even more preferably 0.8 to 60% by weight. In some embodiments, the content is, for example, in a range in which the lower limit is any one of the following values, or in which the upper and lower limits are any two of the following values: The range is: 0.1% by mass, 0.2% by mass, 0.5% by mass, 0.8% by mass, 1% by mass, 2% by mass, 5% by mass, 8% by mass, 10% by mass, 12% by mass, 15% by mass, 18% by mass. %, 20% by mass, 22% by mass, 25% by mass, 28% by mass, 30% by mass, 32% by mass, 35% by mass, 40% by mass, 50% by mass.

The fishmeal substitute is not particularly limited, and for example, protein-containing raw materials obtained from organisms other than fish (plants or animals) can be used. As a fish meal substitute, more specifically, for example, vegetable feed materials such as soybean meal, concentrated soy protein, corn gluten meal, corn distiller's meal, and rapeseed meal; animal feed materials such as meat meal, meat and bone meal, feather meal, and blood meal. Raw materials; Microalgae raw materials; Unicellular biological raw materials such as yeast and bacteria. The fishmeal substitute may be used alone or in combination of two or more.

When the feed of the present disclosure contains a fishmeal substitute, the content of the fishmeal substitute in the feed of the present disclosure (in terms of dry mass) is not particularly limited, but is, for example, 0.1 to 50% by mass. The content is preferably 0.2 to 50% by weight, more preferably 0.5 to 50% by weight, and even more preferably 0.8 to 25% by weight. In some embodiments, the content is, for example, in a range in which the lower limit is any one of the following values, or in which the upper and lower limits are any two of the following values: The range is: 0.1% by mass, 0.2% by mass, 0.5% by mass, 0.8% by mass, 1% by mass, 2% by mass, 5% by mass, 8% by mass, 10% by mass, 12% by mass, 15% by mass, 18% by mass. %, 20% by mass, 22% by mass, 25% by mass, 28% by mass, 30% by mass, 32% by mass, 35% by mass, 40% by mass, 50% by mass.

In addition to the above, the feed of the present disclosure may contain other components as necessary. Other ingredients include, for example, binders (e.g., sodium carboxymethylcellulose (CMC), guar gum, sodium alginate, sodium polyacrylate, sodium caseinate, propylene glycol, etc.), flour (e.g., wheat flour, starch, etc.), minerals, Vitamins (e.g. vitamin C, vitamin B1, vitamin A, vitamin D, vitamin E, etc.), amino acids (e.g. lysine, methionine, histidine, etc.), pigments (e.g. β-carotene, astaxanthin, canthaxanthin, etc.), cod liver oil ( For example, cod liver oil, etc.).

When the feed of the present disclosure contains other components, the content (in terms of dry mass) of the other components in the feed of the present disclosure is not particularly limited, but is, for example, 0.01 to 30% by mass.

The form of the feed of the present disclosure is not particularly limited as long as it is in a form that can be ingested by the target aquatic animal. That is, the feed of the present disclosure may be in any form such as powder, granules, crumbles, pellets, cubes, paste, or liquid. The feed of the present disclosure may be formed into pellets such as dry pellets and moist pellets, for example. The form of the feed of the present disclosure can be appropriately set depending on various conditions such as the type and growth stage of the target aquatic animal. For example, powdered or crumbled feed can usually be preferably used for young fish. Furthermore, for adult fish, dry pellets can usually be preferably used.

The aquatic animal that is the target of the feed of the present disclosure is the same as the aquatic animal that is the target of the feed material of the present disclosure.

Four. Method for producing an aquatic animal The present disclosure provides, as one embodiment, a method for producing an aquatic animal (specifically, for example, an aquatic animal product), which includes feeding an aquatic animal with the feed of the present disclosure. may also be referred to as "the manufacturing method of the present disclosure"). This will be explained below.

The feeding amount of the feed of the present disclosure is not particularly limited. The feeding amount of the feed of the present disclosure can be appropriately selected depending on various conditions such as the type of target aquatic animal. The feeding amount of the feed of the present disclosure may be, for example, the satiation amount. The feed of the present disclosure may be fed once or in multiple portions a day. Additionally, the feed of the present disclosure may be fed once every few days. The feeding amount of the feed of the present disclosure during each feeding may or may not be constant.

The period for feeding the feed of the present disclosure is not particularly limited. The period for feeding the feed of the present disclosure can be appropriately selected depending on conditions such as the type of aquatic animal to be treated. The feed of the present disclosure may be continuously fed during the entire period of aquaculture (breeding), or may be fed only during a part of the period. A "partial period" may be, for example, a period of 10% or more, 20% or more, 30% or more, 50% or more, 70% or more, or 90% or more of the entire period of aquaculture (breeding). The period of feeding the feed of the present disclosure may be, for example, 3 days or more, 1 week or more, 2 weeks or more, 3 weeks or more, 4 weeks or more, 2 months or more, or 3 months or more, and 1 year or less, The period may be 6 months or less, 4 months or less, 3 months or less, 2 months or less, 4 weeks or less, or 3 weeks or less, or a non-contradictory combination thereof. Continuation and interruption of feeding of the feed of the present disclosure may be repeated over an arbitrary period of time.

Aquaculture (breeding) of aquatic animals can be carried out by the same method as the usual method of cultivating (breeding) aquatic animals, except for feeding the feed of the present disclosure. Aquaculture (breeding) can be carried out, for example, in fish cages on the sea or aquariums on land. Note that "aquaculture" includes both aquaculture that only produces seedlings (fry production, etc.) and aquaculture that produces up to adults (broodstock, etc.).

The present invention will be described in detail below based on Examples, but the present invention is not limited to these Examples.

Manufacturing example 1. Production of material containing insect secretions An aquatic animal feed material containing insect secretions was produced using larvae of the Mediterranean fruit fly (Ceratitis capitata) as a raw material. Specifically, the aquatic animal feed material was manufactured as follows. Medfly larvae were grown in feed (constituent materials: wheat bran, yeast, sucrose, moisture). Medfly larvae have the property of jumping out of the feed and pupating outside the feed as they grow. Collect the feed remaining after the larvae have jumped out (larval rearing residue), freeze the rearing residue at -20℃ for 24 hours or more, dry it in a 700W microwave and 80℃ oven, and crush it with a mill. and powdered. The results of analyzing the composition etc. of the obtained powdered rearing residue are shown in Tables 1 and 2 ("%" means mass %). This powdered rearing residue was used in the following examples as insect secretion-containing material.

The composition analysis method is as follows. Moisture is determined by normal pressure heating and drying method, crude protein is determined by combustion method, crude fat is determined by diethyl ether extraction method, crude fiber is determined by filtration method, crude ash is determined by direct ashing method, sodium, potassium, and copper are determined by atomic absorption spectrometry, phosphorus and iron are determined by atomic absorption method. - Calcium and magnesium were analyzed using ICP emission spectrometry, and amino acids were analyzed using automatic amino acid analysis. In Table 2, "amino acids" are the results of quantification using an automatic amino acid analysis method after hydrolyzing the sample, and "free amino acids" are the results of quantification using an automatic amino acid analysis method without hydrolysis.

Example 1. Feeding test for red sea bream Fishmeal feed containing anchovy fishmeal as the main protein source (Test Area 1), feed in which 12% of the total feed was substituted with tuna residue fishmeal (Test Area 2), which is less edible, and tuna fish meal (Test Area 1) Feed (Test Area 3, Test Area 4, Test Area 5) in which the insect secretion-containing material (Manufacturing Example 1) was added to the feed so as to account for 5% by mass, 10% by mass, or 20% by mass of the total feed, Produced as pellets (3.2 mm diameter, 3-5 mm length). The composition of each feed is shown in Table 3. In Table 3, the units of numerical values are parts by mass.

Twenty red sea bream with an average fish weight of 6.5 g were housed in each 1.1 ton capacity aquarium, and a total of 15 aquariums, 3 aquariums for each experimental area, were set up. Each test feed was fed once a day, 6 days a week, until satiety was achieved. After two months of rearing, the average fish weight, feed intake, and feed efficiency [100 x (final total body weight-initial total body weight)/total dry feed intake] were measured. The results are shown in Table 4.

In test plots 3, 4, and 5, which were fed feed containing materials containing insect secretions, the feed intake and feed efficiency were higher than in test plot 2. Test plot 5 showed feed intake higher than test plot 1, and test plot 4 showed feed efficiency higher than test plot 1.

Example 2. Test feed for red sea bream: fishmeal feed containing anchovy fishmeal as the main protein source (test area 1), feed in which 24% of the total feed was substituted with tuna residue fishmeal, which is less edible (test area 2), tuna Feed in which 5% by mass of the total feed was added with a material containing insect secretions from the order of the black soldier fly (Production Example 1) (test group 3), and tuna feed was added with a material containing insect secretions of the order black soldier fly at 5% by mass of the total feed (manufacturing example 1). (A material containing insect secretions obtained using plant-based larval feed using larvae of black soldier fly (Hermetia illucens) as a raw material) (test group 4, comparative example). , produced as pellets (3.2 mm diameter, 3-5 mm length). Table 5 shows the composition of each feed. In Table 5, the units of numerical values are parts by mass.

Twenty red sea bream with an average fish weight of 9.0 g were housed in each 1.1 ton capacity aquarium, and a total of 8 aquariums, 2 aquariums for each experimental area, were set up. Each test feed was fed once a day, 6 days a week, until satiety was achieved. After rearing for 6 weeks, average fish weight, feed intake, and feed efficiency [100 x (final total body weight-initial total body weight)/total dry feed intake] were measured. The results are shown in Table 6.

In Test Group 3, where the feed containing material containing the secretions of the lower order insects was fed, the average final fish weight, food intake, and feed efficiency were higher than in Test Group 2. The results of test group 3 were even higher than test group 1. In addition, in Test Group 3, the average final fish weight, food intake, and feed efficiency were higher than in Test Group 4, which was fed a feed containing material containing black soldier fly insect secretions.

Claims (11)

A feed material for aquatic animals containing the secretions of insects of the order Hyphae. 2. The material according to claim 1, wherein the insect is an insect of the family Fruitfly superfamily. 2. A material according to claim 1, containing feed for said insects. 4. A material according to claim 3, wherein the insect feed comprises a plant-derived fibrous feed. A material according to claim 1, wherein the insect is a larva. The material according to claim 5, which is a rearing residue of the insect. The material according to claim 1, wherein the aquatic animal is a fish or a crustacean. The method for producing the material according to any one of claims 1 to 7, comprising the steps of growing insects of the order Hyphae in feed and separating the insects from the feed. Feed for aquatic animals, comprising the material according to any one of claims 1 to 7. The feed for aquatic animals according to claim 9, wherein the content of the material is 0.5 to 30% by mass. A method for producing an aquatic animal, comprising feeding the aquatic animal the feed for an aquatic animal according to claim 9.