KR101568465B1 - Solid feed composite for culturing leptocephalus and method for culturing leptosephalus by using the same - Google Patents

Abstract

The present invention relates to a method for preparing a feed that enhances the ripening and absorption rate of a reared hatchling (leptosepalus) and irradiates the feed with light having a specific color and wavelength to shorten the transformation time to growth and the eel The present invention relates to a powdered feed of a freshwater eel and a method of culturing the feed.
According to a preferred embodiment, in a state in which the freshwater eel of the freshwater eel is housed in the aquaculture tank, a shark (pellet) is added to the mixed feed powder of the oyster contents, vitamins, krill extract and soybean protein extracted from the squid fish meat and fish (defense, A fish meal prepared by mixing egg yolk powder of egg yolk is fed to the aquaculture water tank and the light irradiated from a light source disposed on the aquarium is irradiated to shorten the growth rate of the ear fish and the transformation period to the eel do.

Description

Technical Field [0001] The present invention relates to a method for producing a feed of Leptocephalus (freshwater eel) (Leptocephalus)

The present invention relates to a powdered feed of freshwater eel's ear fish and a method of culturing the same, and it relates to a method of preparing a feed which enhances the attachment and ingestion rate of reared horsetail (leptosepalus) The present invention relates to a powdered feed of freshwater eel's eel and a method of cultivation using the feed to reduce the time of transformation and growth of the eel.

As is well known, the freshwater eels of the Far East are produced in a relatively large amount by artificial cultivation. However, in the past, the aquaculture of freshwater eel has been transformed into leptosepalus as a self- It is used to capture eel eels that migrate to rivers or reservoirs.

However, in the aquaculture industry of freshwater eels, despite the fact that the overall cost of the eels (fishes) caught by wild fish eel catches fluctuates, in recent years, there is concern about depletion of natural resources due to environmental pollution or damage .

FIG. 1 is a diagram for explaining the yearly catches of Far East fresh water eel fishes. In the Far East freshwater eel fish (blue), the amount of catch gradually decreased from the 1970s to the 2000s.

As a reference, the figure shows that the wild catches of Anguilla rostrata (A.rostrata) and European eel (Anguilla anguilla) are decreased sharply with the decrease in wild catch of Far East freshwater eel.

For this reason, various attempts have been made to establish a complete aquaculture system for artificially ingesting and hatching from a freshwater eel of a freshwater eel, transforming it into a fry via a genitalia (Leptosepalus) It is a successful state from the fry from the natural to the breeding of the parent fish, the artificial spawning, and the artificial hatching, but a considerable obstacle to the freshwater eel fishery business is that since the larvae of artificial hatching are largely killed .

Pretreptosepalus immediately after the hatching of the livestock starts to eat food when the egg yolk of the mother is used as a nutrient source and approximately 8 to 9 days after hatching, It is a situation that the survival period of the eel is to be prolonged and the growth and transformation to the eels should be expected depending on the yolk of the sardine.

Therefore, it is necessary to develop a feed and aquaculture method that can maximize the growth and survival rate of freshwater eel fish eel and shorten the transformation period to the eel, thereby producing the whole artificial seedling and securing the sperm.

1. Published Patent Publication No. 10-2012-0039092 (2012.04.25. Disclosed) 2. Japanese Unexamined Patent Application Publication No. 2007-236368 (published on September 20, 2007) 3. Open Patent Publication No. 10-2011-0018975 (Published Feb. 25, 2011) 4. Japanese Unexamined Patent Application Publication No. 11-253111 (published on September 21, 1999)

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances of the prior art described above, and it is an object of the present invention to provide a fish meal containing fish meal and / or krill extract, fish meal of sea urchin which is similar to freshwater eel, Protein, and vitamins into a fine powder, mixing the shark (especially, shark fish) with egg yolk powder to induce the seedling of the initial feed, and to accelerate the growth and survival rate by irradiation of the freshwater eel The purpose of the present invention is to provide a method of applying a powdered feed of the sea tongue and the feed thereof.

In order to achieve the above object, according to a preferred embodiment of the present invention, there is provided a feed composition which is fed in a state where a Leptocephalus of a freshwater eel is contained in a cultured water tank, the composition comprising squid meat powder and a descending fish similar to the freshwater eel There is provided a powdered feed of freshwater eel's earthenware consisting of a mixture feed powder of egg white content, vitamins, krill extract, and soybean protein extracted from the oyster mushroom and an egg yolk powder of the shark.

The feed powder is mixed with egg yolk extracted from the yolk of the shark and pulverized by rapid freeze-drying.

According to another preferred embodiment of the present invention, there is provided a method of feeding a powdery feed to a freshwater eel in the aquaculture tank, the method comprising the steps of: extracting squid fish meat from the fish of the mullet, which is a descending fish similar to the freshwater eel A feed prepared by mixing egg yolk powder of a shark with a mixed feed powder of egg whites, multivitamins, krill extract, and soy protein is fed to the aquaculture tank, and the light irradiated from the light source disposed on the aquarium The present invention relates to a method of culturing freshwater eel fish powder,

Preferably, the light emitted from the light source includes red light, and the wavelength of the red light is selected in a range of 490 to 640 nm.

According to the powdered feed of the freshwater eel of the present invention and the method of culturing the freshwater eel, the freshwater eel of the freshwater eel is contained in the aquaculture tank, and the contents of the fish extracted from the fish of the mullet, A feed prepared by mixing egg yolk powder of a shark with a mixed feed powder of a vitamin, a krill extract and a soybean protein is fed to the aquaculture water tank, and light irradiated from a light source arranged on the aquaculture water tank is irradiated, It is possible to shorten the growth rate of the eel and the transformation period to the eel, thereby reducing the time and cost for securing freshwater eel and promoting the overall aquaculture industry of the freshwater eel.

Fig. 1 is a diagram for explaining the wild catches of North American eels and European eel's ears including Far East fresh water eels.
FIG. 2 is a schematic view of a system for applying a method of applying a powdered feed of freshwater eel's eardrill according to the present invention. FIG.
FIG. 3 is a graph showing a growth rate versus the number of days of rearing of a test fish (eared fish) by powdered feed of freshwater eel fish (leptosepalus) and a control feed according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail.

First, in the feed of the freshwater eel fish sauce according to the present invention, raw fish meat of squid, fish meal content of mullet as a descending fish similar to the corresponding freshwater eel, krill extract, soybean protein and multivitamin are contained in powder form , And egg yolk powder of shark (in particular, squid) in order to induce grafting of aquaculture feed from an early stage of actual freshwater eel (Leptosepalus) (for example, 8 to 9 days after hatching).

That is, according to the present invention, in case of squid meat, the meat is lyophilized and crushed, and filtered by a filter mesh having a mesh of 1000 mesh or more to obtain a fine powder. The mullet is crushed and filtered with a filter net of 1000 mesh or more By removing the ovary (egg membrane) is obtained the contents of the egg.

Here, the eggs are generally used in the form of eggs, which are obtained from natural or cultured ovaries of the mullet, or processed in the form of salting and freezing eggs.

The process for removing the fish egg poison which inhibits the growth of freshwater eel fish (leptosepalus) including phytate (Phytic Acid) or lectin at the time of preparing the powder feed is also described .

In addition, according to the present invention, it is preferable to treat the above-mentioned contents with protease activity. In the protease activity reduction treatment, when a composition having a high protein protein content is heated, a solidified product is formed, It is subjected to a heat treatment at a temperature at which no solidification occurs (preferably at a temperature of 45 to 70 캜 for about 40 minutes) in consideration of giving a hindrance to the feeding of the frogs (Leptosepalus).

These multivitamins are essential for the health maintenance and improvement of production activities of the aquaculture fishes, but they are necessary for proper payment because they are relatively inefficient environment in aquaculture tank.

Therefore, in the present invention, the multivitamin includes vitamin B1 (Thiamin) which causes symptoms such as weight loss, growth retardation and mortality due to neuropathy at the time of deficiency, vitamins that cause blindness and photophobia B2 (Riboflavin), Vitamin B6 (Pyridoxine), which plays an important role in protein metabolism in the body and induces abnormal swimming activity, dyspnea and mortality such as increased mortality, rejection of feed intake during shortage, Pantothenic acid is a deficiency symptom. Niacin, which induces a decrease in intake and a decrease in feed efficiency and causes a color change in color, skin lesion in deficiency, muscle atrophy, colon lesion, intake (Biotin) to prevent the onset of symptoms such as depression, cramping and the like.

In addition, the multivitamins include folacin, which causes anemia due to immature erythrocytes in the absence of eel or lack of growth, vitamin B12 (cyanocobalamine) necessary for normal growth and erythrocyte maturation and healthy nerve tissue maintenance, , Inadequate growth rate, anemia, and fin necrosis, and inositol (inositol), which is added in an increased amount when the pre-gelatinized starch is high.

In addition, when the body lacks a methyl source such as methionine or betaine, it also contains choline, which is essential for fat metabolism.

In addition, the above-mentioned multivitamins also include vitamin C, which plays an important role in formation of normal teeth and bones, restoration of bone damage, wound healing, and formation of collagen and cartilage. In case of abnormal production or deficiency of collagen, This causes not only the so-called "lordosis" or scoliosis phenomenon that bend or bend to the left and right, but also the normal formation of the gill gouge is inhibited or the shape of the snout or jaw is deformed.

In addition, the multivitamin contains fat-soluble vitamin A (A1, A2), vitamin A plays an important role in visual action, resulting in a decrease in growth rate during deficiency and a symptom of protrusion of the eyeball.

In addition, the multivitamin has biologically active and necessary for the normal formation of the growth skeleton. It also contains vitamin D (D2, D3), and it responds to deficiency of muscular dysfunction, reproductive organ function and corneal peroxide damage Vitamin K, which is necessary for the maintenance of normal blood coagulation rate, which is important for fish in the vitamin E. water, which is caused by a decrease in the ability of red blood cells and severe anemia.

Preferably, according to the present invention, the above-mentioned multivitamins also contain elements that are vulnerable to heat. Therefore, when the corresponding feed is prepared, it is preferable to carry out heat treatment to reduce the activity of the protease in the above- .

In addition, since the multivitamin contains a component susceptible to moisture, it is preferable to freeze and dry the powder during the production of the corresponding feed to allow the feed to be made within 2 to 5 days from the date of manufacture.

According to the present invention, the feed is added in an amount of 30 to 50% by weight, the vitamin 5 to 10% by weight, preferably 6 to 8% by weight, based on 100% by weight of the squid meat powder, The krill extract is added in an amount of 10 to 30% by weight, preferably 15 to 20%, and the soybean protein is added in an amount of 5 to 15% by weight.

In order to improve the feed intake rate of the larvae (Leptosepalus) at the early stage of hatching, the yolk of the shark was freeze-dried and then filtered with a filter net having a mesh of 1000 mesh or more to obtain the feed powder component 20 to 60 Wt%, preferably 30 to 50 Wt%, and more preferably 40 Wt% with respect to 100 Wt%.

The egg powder can be extracted from the egg yolk of the shark, and the egg powder can be mixed with the egg powder, stirred and then rapidly frozen and dried to be crushed, and the crushed feed powder may be filtered with a filter net of 1000 mesh or more.

That is, as shown in the following Table 1, 40% of shark egg yolk powder was added to 60% of the feed powder in order to test the growth / survival of freshwater eel by the feed composition according to the present invention. Were mixed to give a feed 1, while the control feed was prepared by mixing 51% shark, 5% kr shrimp, and 44% distilled water with shark as the main raw material.

           Article 1            Article 2 Squid minced meat
The contents of the mullet
Multivitamin
Krill extract
Soybean protein mixed feed powder 60%

Shark's yolk powder 40% Shark is 51%
Krill decomposition 5%
Distilled water 44%

FIG. 2 is a schematic view of a culture system for applying a method of applying a powdered feed of freshwater eel's eardrill according to the present invention.

In the drawing, '10' is a cultivated water tank, for example, made of synthetic resin, in which a freshwater eel fish as a cultivation object is accommodated, and the lower end thereof is stably supported by the support sphere 12.

The water supply pipe 14, which is heated by a predetermined temperature (23 ° C. in this embodiment) as seawater is fed to the aquarium 10, is disposed on the lower side of the aquarium 14. A plurality of water supply holes 14a are drilled.

A drain pipe 16 for draining aquaculture water as wastewater to the water supply pipe 14 is arranged on the upper side of the water supply pipe 14. The drain pipe 16 is provided with a plurality of water discharging holes 16a are perforated.

The operation system 20 is provided with a control panel 20 for setting the culture environment of the freshwater eel's eardrill according to the present invention. The operation panel 20 is provided with an optical variable A button 20a is included and a temperature variable button 20b for increasing or decreasing the temperature of the aquaculture water is included.

In addition, the aquarium 10 is provided with a water temperature sensor 22 for detecting the temperature of the aquaculture water.

The control unit 24 is connected to the output side of the operation panel 20 and the water temperature detection sensor 22 to control the entire aquaculture system and the control unit 24 is provided with data A setting data memory 26 in which the optical variable period data (for example, light variable period data, water temperature control data) is stored, and a timer 28 for providing a timekeeping result for the optical variable period.

A light source (preferably an LED) 30, which is flickered and controlled in accordance with a period set by the optical variable button 20a, is disposed on an output side of the control unit 24 on the aquarium 10.

On the lower side of the light source 30, a wavelength variable filter 40 for filtering a specific color (preferably, red light) and a wavelength (for example, 490 to 640 nm) is provided.

The controller 24 outputs a heater driving signal for activating a heater (not shown) corresponding to the water temperature variable signal when the water temperature variable button 20b of the operation panel 20 is set .

The controller 24 controls the water temperature set in the operation panel 20 and stored in the setting data memory 26 and the temperature of the light source (not shown) in the state where the optimal wavelength and color are determined in the light wavelength variable filter 40 in the above- 30, the water temperature of the aquaculture water and the light source 30 are turned on.

On the 7th day after the hatching of the broodstock, 300 larvae (Leptosepalus) having a body length of 3.6 mm were dispersed in two 10 L type water tanks for breeding with the above-mentioned 'Feed 1' and 'Feed 2'.

The feed 1 and feed 2 were set three times a day from the 8th day of hatching (that is, the day of initiation of breeding), and the water temperature of the rearing water was set at 23 ° C. From the start of breeding to the transformation of the eel, (Total length) was measured and evaluated.

According to the present invention, with respect to the aquaculture tank in which the 'feed 1' is fed, the condition that the light of specific color and wavelength is irradiated by the light source 30 and the light wavelength variable filter 40 under the support of the above- Respectively.

As shown in FIG. 3, the test fish of the aquaculture tank fed with 'Feed 1' according to the present invention showed remarkable growth of the body length as compared with the control fish fed the 'Feed 2' over the 25th to 250th day of rearing Able to know.

In particular, when the 'feed 1' according to the present invention was fed, transformation into the eel was induced by irradiation of the light source 30 at about 250 days, but in the case of the control fish fed with 'feed 2' The transformation to the eel was induced.

Therefore, it is possible to shorten the period of transformation into the eels by applying the powdered feed of freshwater eel's eardrill, which is assumed in the present invention, and the growth of the corresponding eel (leptosepalus) As a result, it was found that when feeding the feeds beneficial for the seeding and growth of the perishable fishes and irradiating the light of appropriate color and wavelength, the increase of the feed intake and the biological activity in the body were elevated, It is possible to further shorten the time of transformation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

That is, although it has been assumed that the temperature of the aquaculture water is set at 23 ° C, the temperature of the aquaculture water may be gradually increased to 25 to 28 ° C as the days of rearing have elapsed.

The light emitted from the light source 30 is not limited to red light. For example, the wavelength may be changed to a wavelength suitable for the color of the light by the wavelength variable filter 40 while changing to a purple light or a blue light .

Claims (4)

In a feed composition fed with a freshwater eel (Leptocephalus) housed in aquaculture tank,
A mixture of fish meal, vitamins, krill extract, and soybean protein extracted from the oyster mushroom, which is a descending fish similar to the freshwater eel,
Wherein the feed powder is prepared by mixing an egg yolk powder of shark with the powder of the feed of the freshwater eel. [3] The powdered feed of freshwater eel's eardrops according to claim 1, wherein the feed powder is pulverized by mixing with egg yolk extracted from yolk of the shark and rapidly freeze-dried. In a method of feeding and feeding powdered feed with a freshwater eel (Leptocephalus) in the aquaculture tank,
A feed prepared by mixing egg yolk powder of a shark with a mixed feed powder of egg white content, multivitamin, krill extract and soy protein extracted from squid meat powder and a drought fish similar to the fresh water eel, and,
Wherein the light irradiated from a light source disposed on the aquarium is irradiated with light. The method of claim 3, wherein the light emitted from the light source includes red light and the wavelength of the red light is selected from a range of 490 to 640 nm.

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