Epiphytic system and epiphytic method

Abstract

The invention provides an epiphytic system and an epiphytic method. The epiphytic device comprises a water tank with a bottom; an implantation member on which zoospore released from the mother algae can be attached; and a vertical light source capable of irradiating light toward the zoospore from below. The epiphytic device includes: a plurality of brightness detectors disposed above the bottomed water tank and capable of detecting a brightness distribution of the vertical light source; a distribution calculation means for calculating the three-dimensional distribution of zoospore on the basis of the brightness detection results of the plurality of brightness detectors; and a swimming control means that, on the basis of the three-dimensional distribution of the zoospores, controls the swimming of the zoospores so that the zoospores swim toward the bed.

Description

Technical Field

[0001] The present invention relates to an epiphytic system and an epiphytic method. Background Art

[0002] Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2007-244351) discloses the following technique: a growth component main body for growing algae by attaching spores of algae to the surface is composed of an inorganic filler, so that the growth component main body can be easily manufactured by injection molding. Summary of the Invention

[0003] There is room for improvement in efficiently epiphyting zoospores on a landing member in a land-based water tank.

[0004] Provided is an epiphytic system including: a bottomed water tank; a landing member on which zoospores released from a mother alga can epiphyte; and a first light source that can irradiate light toward the zoospores from below. According to the above structure, since the sedimentation and accumulation of the zoospores at the bottom of the bottomed water tank can be suppressed by the negative phototaxis of the zoospores, the zoospores can be efficiently epiphyted on the landing member.

[0005] It is also possible to adopt the following manner, that is, including: a plurality of brightness detectors arranged above the bottomed water tank and capable of detecting the brightness distribution of the first light source; a distribution calculation unit that calculates the three-dimensional distribution of the zoospores based on the brightness detection results of the plurality of brightness detectors; at least one second light source provided at the outer periphery of the bottomed water tank; and a swimming control unit that uses the at least one second light source to control the swimming of the zoospores based on the three-dimensional distribution of the zoospores so that the zoospores swim toward the landing member. According to the above structure, since the zoospores swim toward the landing member, the zoospores can be efficiently epiphyted on the landing member.

[0006] It is also possible to adopt the following manner, that is, the swimming control unit calculates the dense coordinates where the zoospores are most dense based on the three-dimensional distribution of the zoospores, and controls the swimming of the zoospores so that the zoospores concentrated at the dense coordinates swim toward the landing member. According to the above structure, the zoospores can be more efficiently epiphyted on the landing member.

[0007] It is also possible to adopt the following method, that is, the swimming control unit controls the swimming of the zoospores by moving the at least one second light source so that the zoospores concentrated at the dense coordinates swim towards the attachment member. According to the above structure, it is possible to control the swimming of the zoospores by the negative phototaxis of the zoospores so that the zoospores concentrated at the dense coordinates swim towards the attachment member.

[0008] It is also possible to adopt the following method, that is, the at least one second light source includes a plurality of second light sources, and the swimming control unit controls the swimming of the zoospores by selecting the second light source for irradiation among the plurality of second light sources so that the zoospores concentrated at the dense coordinates swim towards the attachment member. According to the above structure, it is possible to control the swimming of the zoospores by the negative phototaxis of the zoospores so that the zoospores concentrated at the dense coordinates swim towards the attachment member.

[0009] It is also possible to adopt the following method, that is, the bottomed water tank has a circular bottom plate and a cylindrical peripheral wall protruding upward from the bottom plate.

[0010] It is also possible to adopt the following method, that is, the attachment member is arranged at the center of the bottomed water tank when viewed from above.

[0011] It is also possible to adopt the following method, that is, the attachment member is a twisted thread.

[0012] Provided is an epiphytic method, in which an attachment member capable of allowing zoospores released from the mother alga to epiphyte is arranged in a bottomed water tank, culture water is injected into the bottomed water tank, the mother alga is arranged in the bottomed water tank, and light is irradiated from below towards the zoospores released from the mother alga. According to the above method, since it is possible to suppress the situation where the zoospores settle and accumulate at the bottom of the bottomed water tank by the negative phototaxis of the zoospores, it is possible to make the zoospores epiphyte on the attachment member efficiently.

[0013] Advantages of the Invention

[0014] According to the present disclosure, it is possible to make zoospores epiphyte on an attachment member efficiently in a land water tank.

[0015] The above object and other objects, features, and advantages of the present disclosure are more fully understood from the following detailed description given below and the accompanying drawings which are given by way of illustration only. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view of the epiphytic device.

[0017] Figure 2Side cross-sectional view of the epiphytic device.

[0018] Figure 3 Block diagram of the epiphytic device.

[0019] Figure 4 Flow chart of the epiphytic method.

[0020] Figure 5 Side cross-sectional view of the epiphytic device.

[0021] Figure 6 Block diagram of the epiphytic device.

[0022] Figure 7 Flow chart of the epiphytic method. Detailed implementation mode

[0023] The present invention will be described below through embodiments of the invention, but the present invention is not limited to the following embodiments. In addition, the structures described in the embodiments are not necessarily all essential as methods for solving the problems. For the sake of clarity of explanation, appropriate omissions and simplifications have been made in the following descriptions and drawings. In each drawing, the same reference numerals are assigned to the same elements, and repeated explanations are omitted as needed.

[0024] Figure 1 A perspective view of the epiphytic device 1 is shown. Figure 2 A side cross-sectional view of the epiphytic device 1 is shown. The epiphytic device 1 is a specific example of an epiphytic system. The epiphytic device 1 is a device for causing zoospores of seaweed to epiphyte on a substrate in a land-based water tank. In addition, the so-called "epiphytic" means that the zoospores attach to the substrate and grow. When the zoospores attach to the substrate, they germinate and become male and female gametophytes. Therefore, in this specification, it is assumed that the zoospores epiphyte on the substrate and the zoospores attach to the substrate have substantially the same meaning.

[0025] The seaweed is any type of green algae, brown algae, or red algae. In this embodiment, the seaweed is typically brown algae such as Ahnfeltia tobuchiensis or Ecklonia cava. Instead, the seaweed can also be kelp, wakame, Sargassum fusiforme, or Spermatochnus paradoxus. As described above, seaweed has the property of reproducing by zoospores, and zoospores are spores with flagella that can swim in water.

[0026] As Figure 1 shown, the epiphytic device 1 includes a bottomed water tank 2, a substrate 3, a mother-algae holding member 4, a vertical light source 5, a horizontal light source 6, a plurality of luminance detectors 7, a moving device 8, a swinging device 9, and an epiphytic control device 10.

[0027] The bottomed water tank 2 is a specific example of a land water tank. The bottomed water tank 2 is circular when viewed from above. That is, the bottomed water tank 2 has a circular bottom plate 2a and a cylindrical peripheral wall 2b protruding upward from the outer peripheral edge of the bottom plate 2a. However, instead, the bottomed water tank 2 may also be rectangular when viewed from above. The diameter of the bottomed water tank 2 is typically set to about 1 m to 2 m, but is not limited thereto. The bottomed water tank 2 is typically made of acrylic resin having high light transmittance. However, the bottomed water tank 2 may also be made of glass, or may be partially made of acrylic resin and the other part made of glass. Seawater K is injected into the bottomed water tank 2. Seawater K is a specific example of aquaculture water having a predetermined salinity.

[0028] The attachment member 3 is made of a material suitable for the attachment of zoospores. The attachment member 3 is typically formed by winding cotton or Cremona (registered trademark) twine around a frame multiple times. However, instead, the attachment member 3 may also be made of mortar or ceramic. The attachment member 3 is disposed at the center of the bottomed water tank 2 when viewed from above. Specifically, the attachment member 3 is fixed to the bottom plate 2a of the bottomed water tank 2 at the center of the bottomed water tank 2 when viewed from above. Typically, the attachment member 3 is provided to extend upward from the bottom plate 2a of the bottomed water tank 2. The attachment member 3 is also referred to as a deposition substrate.

[0029] The mother alga holding member 4 has sufficient weight to hold the mother alga P while preventing the floating of the mother alga P. The mother alga holding member 4 is disposed near the peripheral wall 2b of the bottomed water tank 2 when viewed from above. Specifically, the mother alga holding member 4 is provided on the bottom plate 2a of the bottomed water tank 2 near the peripheral wall 2b of the bottomed water tank 2 when viewed from above. Additionally, the mother alga holding member 4 may be fixed to the bottom plate 2a of the bottomed water tank 2.

[0030] The vertical light source 5 is a specific example of the first light source. The vertical light source 5 irradiates visible light from below onto the zoospores Q released from the mother alga P. Therefore, the vertical light source 5 is disposed below the bottom plate 2a of the bottomed water tank 2. The vertical light source 5 is disposed so as to face the bottom plate 2a of the bottomed water tank 2 in the vertical direction. Typically, the vertical light source 5 is circular in plan view. In the present embodiment, the vertical light source 5 is composed of a surface-emitting LED panel for plant cultivation. The vertical light source 5 may be constituted by arranging a plurality of surface-emitting LED panels, or may be constituted by a single surface-emitting LED panel. Typically, the vertical light source 5 irradiates visible light with a wavelength of 660 nm, which is set to a wavelength suitable for plant growth, from below onto the bottom plate 2a of the bottomed water tank 2. Thereby, due to the negative phototaxis of the zoospores Q, it is possible to prevent the zoospores Q from settling and accumulating on the bottom plate 2a of the bottomed water tank 2. As an example of the surface-emitting LED panel, M-04319 manufactured by Akizuki Electronics Trading Co., Ltd. can be cited. Alternatively, instead of disposing the vertical light source 5 below the bottom plate 2a of the bottomed water tank 2, the vertical light source 5 may be disposed inside the bottomed water tank 2 on the upper surface of the bottom plate 2a of the bottomed water tank 2.

[0031] The horizontal light source 6 is a specific example of the second light source. The horizontal light source 6 is provided on the outer periphery of the bottomed water tank 2 and irradiates visible light onto the zoospores Q. The horizontal light source 6 is provided on the outer periphery of the bottomed water tank 2 and irradiates visible light onto the landing member 3. Specifically, the horizontal light source 6 is provided at a position radially outside the peripheral wall 2b of the bottomed water tank 2. The horizontal light source 6 is disposed so as to face the peripheral wall 2b of the bottomed water tank 2 in the radial direction of the bottomed water tank 2. The horizontal light source 6 is configured to be movable along the peripheral wall 2b of the bottomed water tank 2 by the moving device 8. That is, the horizontal light source 6 can move in an arc shape along the peripheral wall 2b of the bottomed water tank 2 in plan view, and can move in the vertical direction in side view. Typically, the moving device 8 is composed of a guide rail, a device body that is movable along the guide rail, and a drive source such as a motor.

[0032] The orientation of the horizontal light source 6 is configured to be adjustable by the swinging device 9. That is, the elevation angle of the direction in which the horizontal light source 6 irradiates visible light is configured to be adjustable by the swinging device 9. Typically, the swinging device 9 is composed of a device body that holds the horizontal light source 6 so as to be rotatable in the elevation direction and a drive source such as a motor. Typically, the horizontal light source 6 is a light guide plate type surface light source. As an example of the light guide plate type surface light source, A4H-L1116-4S8 manufactured by lumitechno Co., Ltd. can be cited. The horizontal light source 6 is disposed so as to avoid entering the field of view angles of the two brightness detectors 7.

[0033] A plurality of luminance detectors 7 are arranged above the bottomed water tank 2 and detect the luminance distribution of the vertical light source 5. In the present embodiment, the plurality of luminance detectors 7 include two luminance detectors 7. As Figure 1 well as Figure 2 shown, the two luminance detectors 7 are arranged so as to be separated from each other in a plan view. Typically, the two luminance detectors 7 are arranged point-symmetrically with respect to the center of the bottomed water tank 2 in a plan view. Each luminance detector 7 is arranged at a position radially inside the bottomed water tank 2 compared to the peripheral wall 2b of the bottomed water tank 2 in a plan view. Each luminance detector 7 is arranged so that the vertical light source 5 is within the field of view angle. As an example for each luminance detector 7, BM-7AC manufactured by TOPCON TECHNOHOUSE Co., Ltd. can be cited. Each luminance detector 7 outputs the luminance detection result to the epiphyte control device 10. The luminance detection result is data indicating the luminance distribution of the vertical light source 5 observed by each luminance detector 7. Specifically, the luminance detection result is composed of the luminance values per unit solid angle observed from each luminance detector 7.

[0034] In Figure 3 is shown a block diagram of the epiphyte device 1. As Figure 3 shown, the epiphyte control device 10 has a processor 10a and a memory 10b. The processor 10a can access the memory 10b. The processor 10a reads and executes the program stored in the memory 10b. Thereby, the processor 10a causes the hardware such as the processor 10a and the memory 10b to function as a luminance detection result acquisition unit 20, a distribution calculation unit 21, and a floating control unit 22.

[0035] The luminance detection result acquisition unit 20 is a specific example of a luminance detection result acquisition unit. The luminance detection result acquisition unit 20 acquires the luminance detection result from the two luminance detectors 7.

[0036] The distributed calculation unit 21 is a specific example of the distributed calculation element. The distributed calculation unit 21 calculates the three-dimensional distribution of the zoospores Q based on the brightness detection results of the two brightness detectors 7. Specifically, the distributed calculation unit 21 performs geometric calculation of the three-dimensional distribution of the zoospores Q in the bottomed water tank 2 based on the set position coordinates of the two brightness detectors 7, the set postures of the two brightness detectors 7, and the brightness detection results. The distributed calculation unit 21 calculates the three-dimensional distribution of the zoospores Q by utilizing the characteristic that the light irradiated from the vertical light source 5 is blocked by the zoospores Q, as described above. For example, the coordinates where the following first straight line and second straight line intersect indicate the coordinates where the zoospores Q are most concentrated. The first straight line is a straight line connecting one brightness detector 7 and the lowest brightness part in the brightness distribution of the vertical light source 5 observed from this brightness detector 7, and the second straight line is a straight line connecting the other brightness detector 7 and the lowest brightness part in the brightness distribution of the vertical light source 5 observed from this brightness detector 7. Regarding the three-dimensional distribution of the zoospores Q, there are cases where it represents the three-dimensional distribution of the entire space within the bottomed water tank 2, and there are also cases where it only represents the coordinates where the zoospores Q are most concentrated within the bottomed water tank 2.

[0037] The swimming control unit 22 is a specific example of the swimming control element. The swimming control unit 22 controls the swimming of the zoospores Q in such a way that the zoospores Q swim towards the landing member 3 based on the three-dimensional distribution of the zoospores Q calculated by the distributed calculation unit 21. The specific situation is as follows.

[0038] First, as Figure 2 shown, the swimming control unit 22 calculates the concentrated coordinate R where the zoospores Q are most concentrated based on the three-dimensional distribution of the zoospores Q. The concentrated coordinate R can also be said to be the minimum value of the brightness distribution. Next, the swimming control unit 22 controls the swimming of the zoospores Q by moving the horizontal light source 6 in such a way that the zoospores Q concentrated at this concentrated coordinate R swim towards the landing member 3.

[0039] Here, due to the negative phototaxis of the zoospores Q, the zoospores Q swim away from the horizontal light source 6. Therefore, the swimming control unit 22 controls the moving device 8 to move the horizontal light source 6 so that the horizontal light source 6 is arranged in a straight line with the dense coordinates R and the landing member 3 in such a way that the horizontal light source 6 is located on the opposite side of the landing member 3 across the dense coordinates R. In addition, the horizontal light source 6 being arranged in a straight line with the dense coordinates R and the landing member 3 typically means that the central coordinates of the horizontal light source 6 are arranged in a straight line with the central coordinates of the dense coordinates R and the landing member 3. Moreover, the swimming control unit 22 controls the swinging device 9 to adjust the attitude of the horizontal light source 6 so that the horizontal light source 6 irradiates light toward the zoospores Q concentrated at the dense coordinates R. As a result, more zoospores Q will swim toward the landing member 3, and thus, the zoospores Q can be efficiently attached to the landing member 3.

[0040] Next, with reference to Figure 4 , an attachment method using the attachment device 1 will be described.

[0041] S100:

[0042] First, the landing member 3 is provided in the bottomed water tank 2.

[0043] S110:

[0044] Next, seawater K is poured into the bottomed water tank 2.

[0045] S120:

[0046] Next, on the basis of installing the mother alga holding member 4 on the mother alga P, the mother alga P is put into the bottomed water tank 2 for setting. Thereby, zoospores are released from the mother alga P.

[0047] S130:

[0048] Next, the attachment control device 10 turns on the vertical light source 5. Thereby, the vertical light source 5 irradiates visible light toward the zoospores Q released from the mother alga P from below.

[0049] S140:

[0050] Next, the brightness detection result acquisition unit 20 of the attachment control device 10 acquires the brightness detection results from the two brightness detectors 7.

[0051] S150:

[0052] Next, the distribution calculation unit 21 of the attachment control device 10 calculates the three-dimensional distribution of the zoospores Q based on the brightness detection results of the two brightness detectors 7.

[0053] S160:

[0054] Next, the swimming control unit 22 of the epiphytic control device 10 controls the swimming of the zoospores Q in such a way that the zoospores Q swim toward the landing member 3 based on the three-dimensional distribution of the zoospores Q calculated by the distribution calculation unit 21. Specifically, the swimming control unit 22 of the epiphytic control device 10 controls the moving device 8 to move the horizontal light source 6 so that the horizontal light source 6, the dense coordinates R, and the landing member 3 are arranged in a straight line (S170). In addition, the swimming control unit 22 of the brightness detection result acquisition unit 20 controls the swinging device 9 to adjust the attitude of the horizontal light source 6 so that the horizontal light source 6 irradiates light toward the zoospores Q concentrated at the dense coordinates R (S180). Then, the swimming control unit 22 of the epiphytic control device 10 turns on the horizontal light source 6 (S190). Thus, the horizontal light source 6 irradiates visible light toward the zoospores Q released from the mother alga P from the side. In response, the zoospores Q released from the mother alga P start to swim toward the landing member 3.

[0055] S200:

[0056] Next, the brightness detection result acquisition unit 20 of the epiphytic control device 10 obtains brightness detection results from the two brightness detectors 7.

[0057] S210:

[0058] Next, the distribution calculation unit 21 of the epiphytic control device 10 calculates the three-dimensional distribution of the zoospores Q based on the brightness detection results of the two brightness detectors 7.

[0059] S220:

[0060] Next, the swimming control unit 22 of the epiphytic control device 10 controls the swimming of the zoospores Q in such a way that the zoospores Q swim toward the landing member 3 based on the three-dimensional distribution of the zoospores Q calculated by the distribution calculation unit 21. Specifically, the swimming control unit 22 of the epiphytic control device 10 controls the moving device 8 to move the horizontal light source 6 so that the horizontal light source 6, the dense coordinates R, and the landing member 3 are arranged in a straight line (S230). In addition, the swimming control unit 22 of the brightness detection result acquisition unit 20 controls the swinging device 9 to adjust the attitude of the horizontal light source 6 so that the horizontal light source 6 irradiates light toward the zoospores Q concentrated at the dense coordinates R (S240). Then, the epiphytic control device 10 returns the process to step S200.

[0061] The first embodiment of the present disclosure has been described above. The above first embodiment has the following features.

[0062] The epiphytic device 1 (epiphytic system) includes a bottomed water tank 2, a landing member 3 on which zoospores Q released from the mother alga P can attach, and a vertical light source 5 (first light source) that can irradiate light toward the zoospores Q from below. According to the above structure, due to the negative phototaxis of the zoospores Q, the situation where the zoospores Q settle and accumulate at the bottom of the bottomed water tank 2 can be suppressed. Therefore, the zoospores Q can be efficiently attached to the landing member 3.

[0063] In addition, the epiphytic device 1 includes a plurality of luminance detectors 7 disposed above the bottomed water tank 2 and capable of detecting the luminance distribution of the vertical light source 5, a distribution calculation unit 21 (distribution calculation unit) that calculates the three-dimensional distribution of the zoospores Q based on the luminance detection results of the plurality of luminance detectors 7, a horizontal light source 6 (at least one second light source) provided at the outer periphery of the bottomed water tank 2, and a swimming control unit 22 (swimming control unit) that uses the horizontal light source 6 and controls the swimming of the zoospores Q so that the zoospores Q swim toward the landing member 3 based on the three-dimensional distribution of the zoospores Q. According to the above structure, since the zoospores Q swim toward the landing member 3, the zoospores Q can be efficiently attached to the landing member 3.

[0064] The swimming control unit 22 calculates the dense coordinates R where the zoospores Q are most dense based on the three-dimensional distribution of the zoospores Q. The swimming control unit 22 controls the swimming of the zoospores Q so that the zoospores Q concentrated at the dense coordinates R swim toward the landing member 3. According to the above structure, the zoospores Q can be more efficiently attached to the landing member 3.

[0065] The swimming control unit 22 controls the swimming of the zoospores Q so that the zoospores Q concentrated at the dense coordinates R swim toward the landing member 3 by moving the horizontal light source 6. According to the above structure, the swimming of the zoospores Q can be controlled so that the zoospores Q concentrated at the dense coordinates R swim toward the landing member 3 due to the negative phototaxis of the zoospores Q.

[0066] The bottomed water tank 2 has a circular bottom plate 2a and a cylindrical peripheral wall 2b protruding upward from the bottom plate 2a.

[0067] The landing member 3 is disposed at the center of the bottomed water tank 2 when viewed from above.

[0068] Typically, the landing member 3 is a twisted thread.

[0069] The epiphytic attachment of zoospore Q is performed in the following manner. An attachment member 3 capable of attaching the zoospore Q released from the mother alga P is provided in the bottomed water tank 2 (S100). Seawater K, which is the aquaculture water, is injected into the bottomed water tank 2 (S110). The mother alga P is disposed in the bottomed water tank 2 (S120). Light is irradiated onto the zoospore Q released from the mother alga P from below (S130). According to the above method, it is possible to suppress the sedimentation and accumulation of the zoospore Q at the bottom of the bottomed water tank 2 due to the negative phototaxis of the zoospore Q. Therefore, it is possible to efficiently attach the zoospore Q to the attachment member 3.

[0070] (Second Embodiment)

[0071] Next, a second embodiment of the present disclosure will be described. Hereinafter, the description will focus on the differences between this embodiment and the above-described first embodiment, and repeated descriptions will be omitted.

[0072] As Figure 1 and Figure 2 shown, in the above-described first embodiment, the position and attitude of the horizontal light source 6 were adjusted so that the zoospore Q would move toward the attachment member 3.

[0073] In contrast, in the present embodiment, as Figure 5 shown, the attachment device 1 includes a plurality of horizontal light sources 6 provided so as to be arranged in a plurality of numbers on the outer periphery of the bottomed water tank 2. The plurality of horizontal light sources 6 are a specific example of a plurality of second light sources. The plurality of horizontal light sources 6 are arranged along the peripheral wall 2b of the bottomed water tank 2. The plurality of horizontal light sources 6 are arranged at a predetermined interval along the peripheral wall 2b of the bottomed water tank 2 when viewed from above. The plurality of horizontal light sources 6 are Figure 5 arranged in the vertical direction along the peripheral wall 2b of the bottomed water tank 2 as shown in the side view. In the present embodiment, three horizontal light sources 6 are arranged vertically. The upper horizontal light source 6 among the three horizontal light sources 6 irradiates visible light toward the attachment member 3 by setting the irradiation direction of the visible light to be slightly downward. The middle horizontal light source 6 irradiates visible light toward the attachment member 3 by setting the irradiation direction of the visible light to be horizontal. The lower horizontal light source 6 irradiates visible light toward the attachment member 3 by setting the irradiation direction of the visible light to be slightly upward.

[0074] Figure 6 The block diagram of the attachment device 1 of the present embodiment is shown. As Figure 5 and Figure 6 shown, the swimming control unit 22 controls the swimming of the zoospore Q so that the zoospore Q swims toward the attachment member 3 based on the three-dimensional distribution of the zoospore Q calculated by the distribution calculation unit 21. In the present embodiment, the moving device 8 and the swinging device 9 are omitted. The specific details are as follows.

[0075] First, as Figure 5 shown, the swimming control unit 22 calculates the dense coordinates R where the zoospores Q are most dense based on the three-dimensional distribution of the zoospores Q. Next, the swimming control unit 22 controls the swimming of the zoospores Q so that the zoospores Q concentrated at the dense coordinates R swim toward the landing member 3 by selectively lighting any one of the plurality of horizontal light sources 6.

[0076] Here, due to the negative phototaxis of the zoospores Q, the zoospores Q swim away from the horizontal light source 6. Therefore, the swimming control unit 22 selects any one of the plurality of horizontal light sources 6 so that the selected horizontal light source 6 is arranged in a straight line with the dense coordinates R and the landing member 3 with the dense coordinates R therebetween and the landing member 3 on the opposite side. Thereby, more zoospores Q swim toward the landing member 3, and thus, the zoospores Q can be efficiently attached to the landing member 3.

[0077] Next, with reference to Figure 7 , an attachment method using the attachment device 1 will be described.

[0078] The attachment method of the present embodiment is different from the attachment method of the first embodiment described above in steps S160 and S220.

[0079] In step S160 of the present embodiment, the swimming control unit 22 of the attachment control device 10 controls the swimming of the zoospores Q so that the zoospores Q swim toward the landing member 3 based on the three-dimensional distribution of the zoospores Q calculated by the distribution calculation unit 21. Specifically, the swimming control unit 22 of the attachment control device 10 selects any one of the plurality of horizontal light sources 6 so that the selected horizontal light source 6 is arranged in a straight line with the dense coordinates R and the landing member 3 (S170). Next, the swimming control unit 22 of the attachment control device 10 lights the selected horizontal light source 6 (S190). Thereby, the horizontal light source 6 irradiates visible light toward the zoospores Q released from the mother alga P from the side. In response thereto, the zoospores Q released from the mother alga P start to swim toward the landing member 3.

[0080] In step S220 of the present embodiment, the swimming control unit 22 of the attachment control device 10 controls the swimming of the zoospores Q so that the zoospores Q swim toward the landing member 3 based on the three-dimensional distribution of the zoospores Q calculated by the distribution calculation unit 21. Specifically, the swimming control unit 22 of the attachment control device 10 selects any one of the plurality of horizontal light sources 6 so that the selected horizontal light source 6 is arranged in a straight line with the dense coordinates R and the landing member 3 (S230).

[0081] The second embodiment of the present disclosure has been described above. The second embodiment described above has the following features.

[0082] The epiphytic device 1 further includes a plurality of horizontal light sources 6 (at least one second light source) arranged in a manner that a plurality of them are arranged at the outer periphery of the bottomed water tank 2. The swimming control unit 22 controls the swimming of the zoospores Q so that the zoospores Q concentrated at the concentration coordinate R swim toward the landing member 3 by selecting the horizontal light source 6 for irradiation among the plurality of horizontal light sources 6. According to the above structure, it is possible to control the swimming of the zoospores Q so that the zoospores Q concentrated at the concentration coordinate R swim toward the landing member 3 by the negative phototaxis of the zoospores Q.

[0083] In the above example, the program can be stored in and provided to the computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (such as floppy disks, magnetic tapes, hard disk drives), magneto-optical recording media (such as magneto-optical disks). Examples of non-transitory computer readable media also include CD-ROM (Read Only Memory), CD-R, CD-R / W, semiconductor memories (such as mask ROM). Examples of non-transitory computer readable media also include PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory). In addition, the program can also be provided to the computer through various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. Transitory computer readable media can provide the program to the computer via wired communication lines such as wires and optical fibers or wireless communication lines.

[0084] According to the disclosure thus described, it is obvious that the embodiments of the present disclosure can be changed in various ways. Such changes should not be regarded as departing from the spirit and scope of the present disclosure, and for those skilled in the art, all such modifications are obvious and are included within the scope of the technical solution.

Claims

1. An epiphytic system comprising: There is a bottom water tank; An implantation element capable of being attached to zoospores released from the mother algae; A first light source is capable of irradiating light toward the zoospore from below.

2. The epiphytic system according to claim 1, wherein: include: A plurality of brightness detectors are arranged above the bottomed water tank and are capable of detecting the brightness distribution of the first light source; a distribution calculation unit, which calculates the three-dimensional distribution of the zoospores based on the brightness detection results of the plurality of brightness detectors; at least one second light source disposed at the periphery of the bottomed water tank; A swimming control unit uses the at least one second light source to control the swimming of the zoospores in a manner that causes the zoospores to swim toward the implantation part based on the three-dimensional distribution of the zoospores.

3. The epiphytic system according to claim 2, wherein: The swimming control unit calculates the densest coordinates of the zoospores based on the three-dimensional distribution of the zoospores, and The movement of the zoospores is controlled in such a way that the zoospores concentrated at the concentrated coordinates swim toward the implantation part.

4. The epiphytic system according to claim 3, wherein: The swimming control unit controls the swimming of the zoospores by moving the at least one second light source so as to make the zoospores concentrated at the concentrated coordinates swim toward the implantation part.

5. The epiphytic system according to claim 3, wherein: The at least one second light source comprises a plurality of second light sources, The swimming control unit controls the swimming of the zoospores by selecting a second light source from among the plurality of second light sources for irradiation, so as to make the zoospores concentrated at the concentrated coordinates swim toward the implantation part.

6. The epiphytic system according to any one of claims 1 to 5, wherein: The bottomed water tank has a circular bottom plate and a cylindrical peripheral wall protruding upward from the bottom plate.

7. The epiphytic system according to any one of claims 1 to 5, wherein: The implant member is arranged at the center of the bottomed water tank when viewed from above.

8. The epiphytic system according to any one of claims 1 to 5, wherein: The implantation piece is a twisted thread.

9. An epiphytic method, wherein: A bed member is provided in a water tank with a bottom, on which the zoospores released from the mother algae can attach. Injecting aquaculture water into the bottomed water tank, The mother algae are arranged in the bottomed water tank, Light is irradiated from below toward the zoospores released from the mother algae.

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