JP6276638B2 - Aquatic organism observation system with illumination device and aquatic organism observation method - Google Patents

Description

The present invention relates to an aquatic organism observation method and an aquatic organism observation system with a lighting device, and more specifically, provides a method and apparatus for realizing visual inspection during ship inspection (PSC) and improves the convenience of a PSC inspector. The present invention relates to an aquatic organism observation method and an aquatic organism observation system with a lighting device.

  The aquatic organisms and bacteria mixed in the ballast water are transported to foreign countries by ocean-going vessels, which destroys ecosystems that have replaced existing species that did not originally live in the sea area. It is getting serious.

  In 2014, the Government of Japan issued an “International Convention for the Regulation and Management of Ballast Water and Sediment on Ships” (hereinafter referred to as the Ballast Water Management Convention), which obligates ocean-going vessels to use wastewater purification equipment. Established a policy to ratify.

  National legislation has also begun for this ratification and is scheduled to be submitted to the ordinary Diet session in January 2014.

  The Ballast Water Management Convention is composed of Article 22 of the main text, Appendix 5 and 14 guidelines.

  The guideline on ballast water sampling (G2: Guidance on ballast water sampling and analysis for trial use in accordance with the BWM Convention and Guidelines; Non-Patent Document 1) is the ballast water for ship inspection (PSC, etc.). Sampling planning and implementation methods and practical and technical guidance.

  This guideline does not list specific methods for ship inspection. In addition, although there is an inspection item in the IMO document (BWM.2 / Circ.42) related to this guideline issued on May 24, 2013, the specific method is not specified, and the ship inspection It is left to the countries that implement

  Among the above IMO documents, visual inspection is one of the measuring methods / items for simple analysis. Although a comparatively large aquatic organism (50 μm or more) in the ballast water discharged from the ballast tank is visually confirmed, there has been no apparatus developed for that purpose.

http://www.hakuyohin.or.jp/guideline_G2_J.pdf

  The above IMO document includes other simple analysis methods such as observation with stereo microscope (Visual counts or stereo-microscopy), variable fluorometry, photometry, photometry, nucleic acid measurement (Nucleic acid), adenosine triphosphate (ATP), fluorescence activity measurement using FDA (Bulk fluorescein diacetate), chlorophyll a measurement (Chlorophyll a), flow cytometry, and fluorescence analysis diagnostic kit (Fluorometric diagnostic kit).

  However, these methods have problems such as requiring training, uncertain quantitativeness, and being expensive.

  Ship inspections are carried out globally in each country, and visual inspection is practical as a method that can be implemented as a world standard such as implementation in developing countries and quantitativeness. Therefore, the development of an apparatus used for this inspection method is an urgent and urgent issue.

Therefore, the present invention can smoothly carry out visual inspection, which is a simple analysis item for ballast water sampling at the time of ship inspection, does not require training, has a clear quantitative property, and is inexpensive. It is an object to provide an aquatic organism observation method and an aquatic organism observation system with a lighting device that can be realized.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

1. Front, rear, and a visual inspection apparatus effective volume have a bottom and two side faces with a transparent aquarium rectangular solid shape of 0.1L～3.0L, the transparent water tank from the two side surface of the transparent water tank Using an aquatic organism observation system comprising an illumination device equipped with a light source for irradiating LED light to the water to be visually inspected ,
Collect a predetermined amount of ballast water in the ship, which is the water to be visually inspected in the transparent water tank ,
The LED light is irradiated to the ballast water in said transparent water tank,
The irradiated the number of counters toss aquatic organisms observed how to said Rukoto of visibility in the ballast water of aquatic organisms by actualized water producing organism by light.

2. Count of the aquatic organisms, the 1 aquatic organisms observation method, wherein the performing visually from the front surface of the transparent tank.

3. An aquatic organism observation system with a lighting device having a visual inspection device and a lighting device,
The visual inspection device, the front, rear, bottom and have a two side surfaces effective volume: 6.3 transparent and aquarium rectangular solid shape of 0.1L～3.0L, a portion of the ballast water in the transparent water tank With ballast water piping ,
The lighting device includes a light source that irradiates LED light to the visual inspection target water in the water tank from two side surfaces of the transparent water tank,
The ballast water poured into the transparent aquarium is irradiated with LED light, and visibility of aquatic organisms in the ballast water is revealed by the emitted light, thereby enabling the number of aquatic organisms to be counted. An aquatic organism observation system with a lighting device.
4 . 4. The aquatic organism observation system with an illuminating device according to claim 3, wherein a line indicating the effective volume of the transparent water tank is formed on the back surface of the transparent water tank so as to be difficult to correct.

5 . 5. The aquatic organism observation system with illumination device according to 3 or 4, wherein a scale capable of measuring the size of aquatic organisms is provided on the back surface of the transparent aquarium.

6 . 6. The aquatic organism observation system with an illumination device according to 3, 4, or 5, wherein the transparent aquarium has an installation base on which the transparent water tank is detachably installed.

According to the present invention, visual inspection, which is a simple analysis item for ballast water sampling at the time of ship inspection, can be carried out smoothly , training is not necessary, quantitative inspection is clear, and low-cost visual inspection is performed. An aquatic organism observation method and an aquatic organism observation system with a lighting device that can be realized can be provided.

The perspective view which shows 1st Embodiment of the aquatic organism observation system with an illuminating device which concerns on this invention. Side view of the aquatic organism observation system with illumination device shown in FIG. The front view explaining the use condition of the aquatic organism observation system with an illuminating device shown in FIG. The perspective view which shows 2nd Embodiment of the aquatic organism observation system with an illuminating device which concerns on this invention. The perspective view which shows other embodiment of an installation stand The perspective view which shows other embodiment of an installation stand The perspective view which shows other embodiment of a water tank

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

(First embodiment)
FIG. 1 is a perspective view showing a first embodiment of an aquatic organism observation system with a lighting device according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a front view for explaining a use state thereof.

  The aquatic organism observation system with a lighting device includes a visual inspection device and a lighting device.

  The aquatic organism observation system of the present invention is normally used by an inspector who forcibly enters a ship based on PSC and inspects it. The inspector inspects whether or not the water quality is sufficient to dispose of the ballast water from the ballast tank to the sea outside the ship. The inspector brings this system to the ship and counts the number of relatively large aquatic organisms. At that time, when aquatic organisms are confirmed, it can be determined that the water quality is not sufficient for disposal. There are other items that define the water quality, but if the water quality is a problem in this visual inspection, the possibility that the other items are also a problem is very high. In addition, this system may be used by a crew member who is a ship crew member to check water quality.

  The visual inspection apparatus includes a water tank 1, a lid member 2, and an installation table 3. Further, the lighting device includes a light source 4 and a power source 5.

  The aquarium 1 is a transparent aquarium having an upper opening 10 and a front surface 11, a rear surface 12, two side surfaces 13, 13 and a bottom surface 14, all of which are made of a transparent plate. Here, the front surface 11 is a surface on the side where visual inspection is performed when aquatic organisms in the ballast water poured into the aquarium 1 are visually inspected.

  In this system, the water tank 1 is required to be transparent. This is because the number of aquatic organisms can be visually counted from the front surface 11. Since it only needs to be transparent, it may be colorless and transparent or colored and transparent. In the case of colored and transparent, a color property that does not hinder the counting of aquatic organisms by visual observation is required.

  When the inspector brings the system into the ship, it is desired that the system is small and light, so that a transparent resin plate, a glass plate, or the like is used as the transparent plate. Among them, it is preferable to use a transparent resin plate in order to realize cost reduction. Examples of the resin material for the transparent resin plate include acrylic resin, polyethylene terephthalate, and polybutylene terephthalate, and acrylic resin is preferable.

  Considering the light weight and portability required by the system user, the effective volume of the water tank 1 is 0.1L or more and 3.0L or less, preferably 0.5L or more and 2.0L or less. The shape of the water tank is preferably a rectangular solid shape, for example, a rectangular parallelepiped shape in consideration of the light condensing property from the lighting device.

  The thickness of the transparent resin plate is preferably 1 mm to 3 mm, and more preferably 1.5 mm to 2.0 mm.

  Although the specific magnitude | size of the water tank 1 is suitably determined according to a desired volume, it is preferable to form in the rectangular parallelepiped shape whose depth D is sufficiently small compared with the width W and the height H. This is because the front surface 11 is wide and the depth becomes smaller with respect to the front surface 11, so that it is easier to visually check aquatic organisms in the ballast water stored inside. As a specific example, when inspecting 1 L of ballast water, the inner dimensions can be set to W200 mm, H200 mm, D30 mm in consideration of the effective depth, and when inspecting 0.1 L of ballast water, Dimension can be W100mm, H100mm, D15mm.

  A line 15 indicating an effective volume is formed in the thickness of the outer surface, the inner surface, or the transparent plate of at least one of the front surface 11, the back surface 12, and the side surfaces 13 and 14 of the water tank 1.

  It is extremely important that the line 15 has a clear quantitative property and is difficult to correct in order to ensure the objectivity of the water quality test. This is because if this line is easily rewritten, the reliability of the inspection system itself is lost.

  In this embodiment, a line 15 is formed on the back surface 12. The line 15 is formed at a height of 170 mm from the upper surface of the bottom surface 14 when, for example, inspecting the 1 L ballast water described above, and 67 mm from the upper surface of the bottom surface 14 when inspecting the 0.1 L ballast water described above. Formed to a height.

  The line 15 indicating the effective volume formed on the transparent plate may be formed by any method as long as it is difficult to correct, that is, it cannot be easily rewritten. For example, it may be a printing line that is difficult to peel off or a sticker sticking that is difficult to peel off, but it may also be a groove by engraving. Moreover, you may form by embedding the line etc. which were colored red, for example inside the thickness of a transparent plate. This is because the 0.1 L line, 0.5 L line, 1 L line, and 2 L line must not be rewritten in order to ensure the objectivity of the visual inspection. The line should not fluctuate to convince the shipowner of the inspection results. In addition, when a line is formed with an easy-to-peel seal, when the inspector leaves the system, the ship owner may peel off the line and replace it. In order to prevent them, the above-described technique that cannot be easily rewritten is preferable.

  The rear surface 12 of the water tank 1 preferably has a scale 16 a for measuring the size of aquatic organisms in the water tank 1. Thereby, it is possible to easily specify the location of aquatic organisms having a size larger than a predetermined size and to count the number of aquatic organisms.

  In the example shown in FIG. 1, the scale plate 16 on which the scale 16 a is printed is detachably attached to the outer surface of the back surface 12 of the water tank 1. By making it detachable, it can be removed when it is not necessary, or it can be replaced when the scale becomes dirty.

  The scale plate 16 can be formed of a resin plate. The resin plate may be formed of a transparent resin plate, or may be formed of a colored resin plate colored in white or black according to the turbidity of the ballast water poured into the water tank 1 so that the inside of the water tank 1 You may make it improve the visibility of aquatic organisms.

  As a method of mounting the scale plate 16, it may be performed by double-sided or single-sided adhesive tape, or an engagement groove (not shown) for engaging the scale plate 16 with the outer surface of the back surface 12 to be mounted is formed. In addition, when the scale plate 16 is used, it may be mounted in the engaging groove. Further, the scale plate 16 may be electrostatically attracted to the back surface 12.

  In this system, the lid member 2 can be provided in order to prevent water inside the water tank 1 from jumping out. The lid member 2 is provided on the lid body 21 having a size covering the entire opening 10 of the water tank 1, a knob 22 on the upper surface of the lid body 21, and a lower surface of the lid body 21. It has a tension portion 23 that fits and prevents displacement.

  The installation stand 3 installs the water tank 1 in a detachable manner. The installation base 3 includes a bottom plate 31 that covers the outer surface side of the bottom surface 14 of the water tank 1 and a back plate 32 that is connected to the bottom plate 31 and covers the outer surface side of the back surface 12 of the water tank 1.

  The bottom plate 31 has the same size as the bottom surface 14 so as to cover the entire bottom surface 14 of the water tank 1, and the back plate 32 also covers the entire back surface 12 of the water tank 1. 12 has the same size.

  The bottom plate 31 and the back plate 32 can be formed of a resin plate, a glass plate, a metal plate, and a wooden plate, but are preferably formed of a resin plate in terms of being lightweight and inexpensive. The resin plate may be transparent or colored, but is preferably colored white or black from the viewpoint of improving the visibility of aquatic organisms in the water tank 1. In particular, the bottom plate 31 is colored white from the viewpoint of improving the visibility of aquatic organisms in the aquarium 1 by reflecting light from the light sources 4 and 4 described later upward, or a reflective foil is formed. It is preferable.

  Moreover, you may make it insert between the back surface 12 of the water tank 1 and the back plate 32 of the installation stand 3 so that the background board (not shown) which is another components colored in white, black, etc. can be attached or detached. . Thereby, the background color of the back surface 12 side of the aquarium 1 can be easily changed to an arbitrary color according to the turbidity of the ballast water injected into the aquarium 1, and the visibility of aquatic organisms in the aquarium 1 can be improved. It can be improved further.

Further, the installation table 3 has a front plate 33 that covers the front surface 11 side of the water tank 1 placed on the bottom plate 31, and side plates 34 and 34 that cover the two side surfaces 13 and 13. The front plate 33 and the side plates 34, 34 are formed by a transparent plate similar to the water tank 1 so as to be sufficiently lower than the height of the water tank 1, and are formed on the front edge and both side edges of the bottom plate 31. Each is fixed.
Thereby, when the aquarium 1 is installed on the bottom plate 31 of the installation table 3, the front 11 and both side surfaces 13, 13 of the aquarium 1 are surrounded by the front plate 33 and the side plates 34, 34. And improve the workability of the inspector. If formed so as to be sufficiently lower than the height of the water tank 1, the visibility inside the water tank 1 is not affected. The front plate 33 and the side plates 34, 34 can have a thickness of 1.5 mm, for example.

  The illumination device includes light sources 4 and 4 and a power source 5. The lighting device irradiates light toward the inside of the water tank 1 installed on the installation table 3.

  As the light sources 4 and 4, fluorescent tubes and LEDs (light emitting diodes) can be used, and LEDs are particularly preferable. This is because it is smaller and lighter than a fluorescent tube, has a long lifetime, low power consumption, and is easy to maintain.

  Moreover, since LED has a small calorific value and there is no fear of raising the water temperature in the water tank 1, it is also preferable from the viewpoint of observing aquatic organisms in a living state. The LED is preferably white in that the visibility of aquatic organisms is good.

  The LED serves as a point light source, but by arranging a plurality of LED elements 41 in the height direction of the light source 4, the light in the entire water tank 1 can be uniformly irradiated.

  From the viewpoint of further improving the visibility of aquatic organisms in the aquarium 1, it is preferable to provide a plurality of rows of LED elements 41 arranged as shown in FIG. Such a row | line | column of several LED element 41 can be easily comprised by using an LED tape.

  The light sources 4, 4 are attached to the side plates 34, 34 of the installation base 3 and extend upward at a height equal to or higher than the height of the water tank 1.

  The light emitted from the light sources 4 and 4 is irradiated over the entire outer surface of the side surfaces 13 and 13, and combined with the light diffusion effect by the side surfaces 13 and 13 of the water tank 1, the light from the light sources 4 and 4 is emitted. Irradiation can be performed over the entire inside of the water tank 1.

  The power source 5 is provided on the back side of the back plate 32 of the installation table 3 and is connected to the light sources 4 and 4 by wirings 42 and 42 so that driving power can be supplied. The power supply 5 accommodates a dry battery in a power supply box 51 detachably attached to the back plate 32 of the installation base 3. A switch 52 is provided in the power supply box 51, and the light sources 4 and 4 are turned ON / OFF by operating the switch 52. The power source may be alternating current or direct current, or a power source charged in a charger may be used.

  Conventionally, as this kind of observation system for observing aquatic organisms, one without an illumination device is known. However, those accompanied by a lighting device are devices for lifelong educational purposes and breeding, and many large items. It is the present invention to provide an epoch-making system that can ensure the objectivity of inspection when the inspector under the convention conducts visual inspection based on the convention, realizes portability, and realizes low cost.

  Next, the usage method of this aquatic organism observation system with an illuminating device is demonstrated.

  The inspector brings an aquatic organism observation system with a lighting device into the ship to be inspected, samples a part of the ballast water from the ballast water pipe, and enters a predetermined amount (for example, 1 L or 0. 0) shown in the water tank 1. Pour water until it reaches 1L. Thereafter, the lid member 2 is attached to the opening 10 to prevent water from jumping out.

  At this time, the water tank 1 can perform water injection work in a state where it is removed from the installation base 3 having heavy electric parts such as the light sources 4, 4, etc. There is no fear of it.

  Next, the water tank 1 with the lid member 2 is placed on the bottom plate 31 surrounded by the front plate 33, the side plates 34 and 34 and the back plate 32 of the installation base 3, and then the switch 52 of the power source 5 is turned on. Thus, the light sources 4 and 4 are turned on, and light is irradiated from the side surfaces 13 and 13 into the water tank 1.

  Thereby, when the aquatic organism X of 50 micrometers or more inhabits the ballast water in the aquarium 1, the visibility of the aquatic organism X is revealed by the light of the light sources 4 and 4 which irradiate the inside of the aquarium 1 thoroughly.

  For this reason, even if it exists in a dark ship, the aquatic organism X can be visually confirmed easily and the number can be counted, and the visual inspection by the inspector of ballast water can be implemented to lubrication. At this time, when it is confirmed that the aquatic organism X is inhabiting in the aquarium 1, the ballast water can be judged on the spot that the discharge to the outside of the ship is incompatible, and a quick judgment is possible. It becomes.

(Second Embodiment)
FIG. 4 is a perspective view showing a second embodiment of the aquatic organism observation system with an illumination device according to the present invention. Since the site | part of the same code | symbol as the aquatic organism observation system with an illuminating device which concerns on 1st Embodiment shown in FIGS. 1-3 is a site | part of the same structure, these description uses the said description and abbreviate | omits here. .

  This visual inspection apparatus further includes a base 6 on which the installation base 3 is detachably installed. The pedestal 6 is formed in a rectangular flat plate shape by, for example, a resin plate or a wooden plate. For this reason, portability is good.

  On the upper surface 61 of the pedestal 6, support portions 62 and 62 for detachably supporting the installation table 3 are erected at a position near one end portion 63. The support portions 62, 62 are formed in a U-shape in a plan view so as to support a part of the front plate 33 and the back plate 32 from the side plates 34, 34 of the installation table 3, and between the two support portions 62, 62. The mounted installation base 3 is supported so as to be sandwiched from both sides thereof. The support portions 62 and 62 are arranged so that the front surface 11 of the water tank 1 faces the other end portion 64 side facing the end portion 63 when the installation base 3 is mounted.

  Further, on the upper surface 61 of the pedestal 6, the water tank 1 installed on the installation table 3 attached to the support units 62, 62 is photographed from the front surface 11 side at a position near the other end 64. An installation shelf 65 for fixing the photographing device 7 is provided.

  In FIG. 4, a digital camera is illustrated as the photographing device 7, and the installation shelf 65 is constituted by a two-stage shelf, the head of the male screw is brought into contact with the surface of the lower shelf, and the screw portion is provided upward. The threaded portion penetrates the upper shelf and protrudes from the surface of the upper shelf. The digital camera is fixed by the protruding screw part.

  The distance between the installation shelf 65 and the support portions 62 and 62 can be appropriately determined in consideration of the angle of view, the focal length, and the like of the imaging device 7.

  According to this aquatic organism observation system with an illuminating device, an image is fixed to the installation shelf 65 in a state in which the installation table 3 including the water tank 1 into which ballast water has been poured is mounted on the support portions 62 and 62 on the base 6. The apparatus 7 can easily photograph the water tank 1 from the front surface 11 side, and can easily photograph evidence photographs of aquatic organisms that inhabit the ballast water.

  In addition, the installation shelf 65 may be a one-stage shelf or a two-stage or more shelf other than the illustrated two-stage shelf.

  Further, in order to facilitate positioning of the installation shelf 65 on the upper surface 61 of the pedestal 6, two rails can be formed on the pedestal 6.

  A foldable or detachable leg (not shown) may be provided on the lower surface of the base 6.

(Other embodiments)
5 and 6 are perspective views showing another embodiment of the installation base 3 in the aquatic organism observation system with illumination device according to the present invention. Since the site | part of the same code | symbol as FIGS. 1-4 is a site | part of the same structure, these description uses the said description and abbreviate | omits here.

  FIG. 5 shows the installation base 3 not provided with the light sources 4 and 4 shown in FIGS. In this installation stand 3, when aquatic organisms in the aquarium 1 are visually inspected, visual confirmation can be performed using illumination in the ship or sunlight. Since there are no light sources 4 and 4 and the power supply 5, there exists an advantage which is lighter and is excellent in portability.

  FIG. 6 shows the installation table 3 that is not provided with the light sources 4 and 4 as in FIG. 5, and this installation table 3 includes the front plate 33 and the side plate of the installation table 3 shown in FIGS. 1 to 3. 34 and 34 are not provided, and only the bottom plate 31 and the back plate 32 are configured.

  The installation table 3 shown in FIG. 6 is also the installation table shown in FIG. 5 in that when the aquatic organisms in the aquarium 1 are visually inspected, visual confirmation can be performed using illumination in the ship or sunlight. 3, but because there is no front plate and side plate, there is an advantage that it is lighter and more portable than the installation table 3 of FIG. 5 and is inexpensive.

  FIG. 7 shows another embodiment of the water tank 1. This water tank 1 is provided with a light source 4, and light sources 4 and 4 are provided on two side surfaces 13 and 13 of the water tank 1, respectively. In this case, the connections between the light sources 4 and 4 and the wirings 42 and 42 that electrically connect the power source 5 are connected by the light sources 4 and 4 side connectors 43 and 43 and the wirings 42 and 42 side connectors 44 and 44. It is preferable to adopt a configuration to do so. The workability can be improved by disconnecting the heavy power source 5 when the ballast water is poured.

  Although this water tank 1 with the light source 4 can also be used independently, it can also improve the visibility of aquatic organisms by installing and using it in the installation stand 3 shown in FIG. 5, FIG. it can.

DESCRIPTION OF SYMBOLS 1: Water tank 10: Opening part 11: Front surface 12: Back surface 13: Side surface 14: Bottom surface 15: Line 16: Scale plate 16a: Scale 2: Lid member 21: Lid main body 22: Pick part 23: Tension part 3: Installation stand 31 : Bottom plate 32: Back plate 33: Front plate 34: Side plate 4: Light source 41: LED element 42: Wiring 43, 44: Connector 5: Power supply 51: Power supply box 52: Switch 6: Base 61: Upper surface 62: Support part 63: One end 64: The other end 65: Installation shelf 7: Imaging device

Claims (6)

An aquatic organism observation system with an illumination device configured by a visual inspection device and an illumination device,
The visual inspection apparatus is an effective volume 0.1L～3.0L, front, rear, and a transparent aquarium rectangular solid shape having a bottom surface and two side surfaces, the location of a predetermined size or more aquatic organisms And a removable scale plate for counting the number of aquatic organisms
The lighting device includes a light source that irradiates LED light to the visual inspection target water in the water tank from two side surfaces of the transparent water tank,
A predetermined amount of ballast water in the ship, which is the visual inspection target water, is collected in the transparent water tank,
The ballast water in the transparent aquarium is irradiated with LED light, and the visibility of aquatic organisms in the ballast water is revealed by the irradiated light, and the presence of aquatic organisms of a predetermined size or more by the scale plate An aquatic organism observation system with an illumination device, characterized by identifying a place and counting the number of aquatic organisms. Wherein the back of the transparent aquarium, with lighting system aquatic observation system according to claim 1, wherein a line indicating the effective volume of the transparent aquarium has been modified difficulties formation. The scale plate, aquatic observation system according to claim 1 or 2 characterized in that it has a measurable scale the size of aquatic organisms. With lighting system aquatic observation system according to claim 1, 2 or 3, wherein further comprising a mount base which the transparent water tank is installed detachably. Front, back, the number of bottom and two transparent and water tank of the chromatic effective volume of 0.1L~3.0L rectangular solid shape side surface, specific and aquatic location of a predetermined size or more aquatic organisms a visual inspection apparatus having a detachable scale plate for counting, the illumination device having a light source that irradiates from the two side surfaces on visual inspection target water in the transparent aquarium L ED light transparent aquarium Aquatic organism observation system consisting of
Collect a predetermined amount of ballast water in the ship, which is the water to be visually inspected in the transparent water tank ,
The LED light is irradiated to the ballast water in said transparent water tank,
Wherein the visibility of the illuminated said ballast water aquatic organisms by light by actualized, be characterized count Tosu Rukoto a number of specific and water producing organism of the location of a predetermined size or more aquatic organisms that aquatic organisms observation method. Count of the specific and aquatic organisms location of the predetermined size or more aquatic organisms, aquatic organisms observation method according to claim 5, characterized in that visually from the front surface of the transparent tank.

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