JP2007086059A - Instrument for measuring underwater aquatic organism production respiration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To measure a change in a dissolved oxygen amount caused by production, consumption or decomposition of oxygen by an aquatic organism of a measuring object, under a condition where a volume blocked from an outside is maintained constant, and an environmental condition affecting it. <P>SOLUTION: This instrument is provided with a measuring container having a sealed measuring space formed of a transparent member and having water tightness, a dissolved oxygen sensor for detecting a dissolved oxygen amount in water filled in the sealed measuring space, inside the sealed measuring space, a stirrer for stirring the water filled in the sealed measuring space, a flow-in port for injecting and blocking water from an outside of the sealed measuring space into the sealed measuring space, a discharge port for discharging and blocking the water from an inside of the sealed measuring space to the outside of the sealed measuring space, and a data processing part for controlling and recording the dissolved oxygen caused by the production, the consumption or the decomposition of oxygen by the aquatic organism of the measuring object in the water filled in the sealed measuring space. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underwater aquatic product respiration measurement apparatus. More specifically, the present invention relates to an underwater aquatic organism production respiration measuring apparatus that is installed in water and continuously measures the production and consumption of oxygen or the degradation rate of organisms in the water.

  As an apparatus for measuring a change in the dissolved oxygen amount in water caused by a conventional aquatic organism, for example, there is an oxygen consumption measuring apparatus on the seabed (Patent Document 1).

  This oxygen consumption measuring device is intended to be installed in the coastal area of the sea, particularly in tidal flats or seaweed beds in shallow areas, and to measure the supply and absorption of oxygen from the seabed. As shown in FIG. 9, the oxygen consumption measuring device 100 includes a cylinder 102 fixed inside a framed frame 101 and a lid 103 that closes the upper end of the cylinder 102. In order to limit the measurement area when installed, the lower end of the cylinder 102 is provided with an infiltration partition 104 having the same diameter as that of the cylinder 102 and having an open bottom. Then, a measurement space is formed by the cylinder 102, the lid 103, the infiltration partition 104 and the seabed, and the photon sensor 105, the dissolved oxygen sensor 106, the salinity sensor 107, and the water temperature sensor 108 measure each of the seawater in the measurement space. Do. Furthermore, a seawater inlet 109 is provided at the upper side of the side surface of the cylinder 102, and a discharge pump (not shown) is provided at a position opposite to the seawater inlet 109, and the discharge pump is operated to discharge the seawater in the measurement space. At the same time, the seawater is newly sucked from the seawater inlet 109, and the inside of the cylinder 102 is filled with seawater.

JP-A-10-260178

  However, in the measurement apparatus of Patent Document 1, since the bottom of the measurement apparatus is open and the measurement space is not sealed, the measurement apparatus is in contact with the measurement target seabed, so that only the measurement target organism that floats, swims, or adheres to water. There is a problem that the production and consumption rate of oxygen caused by the production and consumption or decomposition of oxygen cannot be measured.

  Furthermore, since the bottom of the measurement device is open and the measurement space is not sealed, the sample in the measurement space is unnecessarily replaced by the inflow and outflow of seawater due to an external pressure such as an ocean current. Therefore, there is a problem that it is difficult to perform such measurement even when measurement in a state of being blocked from the outside is required. Also, because the measuring device tilts or sinks due to sea conditions or due to self-washing due to the influence of waves, currents, etc., the measurement space is shut off from the outside and the volume is kept constant. There is a problem that it is difficult to measure.

  Further, the seawater in the measurement space is exchanged by a discharge pump, but the water injection is a natural inflow from the seawater inlet, and therefore there is a problem that the exchange efficiency of the seawater in the measurement space is poor.

  Furthermore, since the storage type power supply is used by installing in water, there is a problem that the operation time of the apparatus is limited.

  Accordingly, the present invention provides a change in the amount of dissolved oxygen caused by the production and consumption or decomposition of oxygen by the aquatic organisms to be measured and the environment that affects this in a state where the volume is kept constant and is blocked from the outside. An object of the present invention is to provide an apparatus for measuring respiration of aquatic aquatic organisms capable of measuring conditions.

  In addition, the present invention provides aquatic aquatic organism production that enables measurement in a state where the water in the measurement space is regularly exchanged with the outside water, and the volume is kept constant except when exchanged. An object of the present invention is to provide a respiration measuring device.

  Furthermore, the present invention provides an aquatic aquatic production respiration measurement device capable of extending the measurement period by suppressing a decrease in the amount of power stored in a storage battery that is a power source for operating a main body installed in water. Objective.

  In order to achieve such an object, an underwater aquatic organism respiration measurement apparatus according to claim 1 is provided with a measurement container having a sealed measurement space formed of a transparent member and having water tightness, and a sealed measurement space in the sealed measurement space. A dissolved oxygen sensor that detects the amount of dissolved oxygen in the water filled inside, a stirrer that stirs the water filled in the sealed measurement space, and a flow that pours water into and out of the sealed measurement space. An inlet and an outlet for draining and shutting off water in the sealed measurement space to the outside of the sealed measurement space are provided. In this case, the measurement is performed in a state of being shut off from the outside by providing a measurement container having a sealed measurement space with water tightness, a drainage / water injection device for water inside and outside this sealed measurement space, and a device for measuring dissolved oxygen. The amount of dissolved oxygen in the water filled in the space can be measured. In particular, by closing the bottom of the measuring device, it is possible to measure the amount of dissolved oxygen without being affected by the generation or consumption of oxygen caused by the seabed in contact with the measuring device. The measuring device does not tilt or sink due to self-cleaning due to the influence of the above, and the measurement can be performed in a state where the measurement space is blocked from the outside and the volume is kept constant.

  The invention described in claim 2 is the apparatus for measuring respiration of underwater aquatic organisms according to claim 1, wherein any one or two of a salinity sensor, a water temperature sensor, a photon sensor, and a chlorophyll sensor are provided in the sealed measurement space. Have more than one. In this case, by providing various sensors, the salinity, water temperature, light intensity, and chlorophyll concentration that affect the production and consumption of oxygen by the organism to be measured can be measured together with the amount of dissolved oxygen.

  The underwater aquatic organism respiration measurement device according to claim 3 is a measurement container having a sealed measurement space formed of a transparent member and having water tightness, and dissolution of water filled in the sealed measurement space in the sealed measurement space. Dissolved oxygen sensor that detects the amount of oxygen, stirrer that stirs the water filled in the sealed measurement space, an inlet for water injection and shutoff in the sealed measurement space outside the sealed measurement space, and in the sealed measurement space Control of measurement of the amount of dissolved oxygen caused by the production and consumption or decomposition of oxygen by the target aquatic organism in the water filled in the sealed measurement space And a data processing unit for recording, which is installed in water and puts or introduces aquatic organisms into a closed measurement space, and measures changes in the amount of dissolved oxygen caused by aquatic organisms To have. In this case, a measurement container having a sealed measurement space with water tightness, a drainage / water injection device for water inside and outside this sealed measurement space, a measuring device for dissolved oxygen, a data processing unit, etc. are used to shut off from the outside. It is possible to measure a change in the dissolved oxygen amount of water filled in the sealed measurement space in a state.

  According to a fourth aspect of the present invention, in the underwater aquatic organism respiration measuring apparatus according to the third aspect, any one or more of a salinity sensor, a water temperature sensor, a photon sensor, and a chlorophyll sensor are provided in the sealed measurement space. And measuring changes in one or more of salinity in water, water temperature, light intensity, and chlorophyll concentration that affect changes in the amount of dissolved oxygen. In this case, by measuring various changes in salinity, water temperature, light intensity, and chlorophyll concentration that affect the production and consumption of oxygen by the organism being measured, along with changes in the amount of dissolved oxygen, by providing various sensors. Can do.

  The invention described in claim 5 is the underwater aquatic organism respiration measurement apparatus according to any one of claims 1 to 4, further comprising an inflow pump for injecting water outside the sealed measurement space into the sealed measurement space. I am doing so. In this case, the water in the sealed measurement space can be exchanged efficiently by providing the inflow pump.

  The invention according to claim 6 is the underwater aquatic organism production respiration measurement apparatus according to any one of claims 1 to 5, wherein water flows outside the sealed measurement space into the sealed measurement space above the measurement container. And a two-way check valve that discharges the gas in the sealed measurement space to the outside of the sealed measurement space and prevents the ejection of water in the sealed measurement space. According to this, by providing the two-way check valve, it is possible to vent the gas in the sealed measurement space and to prevent unnecessary ejection of water in the sealed measurement space.

  The invention according to claim 7 is the apparatus for measuring respiration of underwater aquatic organisms according to any one of claims 1 to 6, wherein the measurement container comprises a main body, a bottom plate or shielding film for closing the bottom of the main body, and the main body. And the lid between the main body and the bottom plate or the shielding film and between the main body and the lid are closed with water tightness. According to this, by removing the bottom plate as necessary and replacing it with a shielding film that can seal to the bottom of the seabed, such as coral or seaweed that inhabits the seafloor, seaweed beds, coral reefs, etc. that are shallow areas on the coast of the sea It is possible to measure the amount of oxygen generated and consumed in the device or in the fixed state of seafloor fixed organisms such as seaweed and coral, or lake bottom fixed organisms that inhabit the bottom of inland waters and can be sealed to the fixed base by a shielding film. it can. Further, by forming the measurement container from the main body and the lid and the bottom plate or the shielding film, the apparatus can be easily disassembled and assembled.

  The invention according to claim 8 is the apparatus for measuring respiration of aquatic aquatic life according to claim 7, wherein the frame is provided with a frame for fixing the main body therein, and extends to the same height as the bottom of the main body, the bottom plate or the shielding film. Is further provided. According to this, the posture of the apparatus can be stably maintained by providing the frame foot on the frame.

  The invention described in claim 9 is characterized in that, in the apparatus for measuring respiration of underwater aquatic organisms according to any one of claims 1 to 8, a solar cell is provided as an auxiliary power source. According to this, by providing the solar cell, it is possible to delay the decrease in the amount of electricity stored in the storage battery, which is a power source for operating the device.

  As described above, according to the first aspect of the present invention, the dissolved oxygen amount of water filled in the sealed measurement space can be measured in a state of being shut off from the outside. It is possible to measure the dissolved oxygen content of the water filled in the sealed measurement space, while eliminating the influence of external factors such as oxygen production caused by.

  According to the invention described in claim 2, in addition to the amount of dissolved oxygen, the salinity, water temperature, and light intensity affecting the production and consumption of oxygen or the rate of decomposition by the floating and fixed or swimming aquatic organisms to be measured. Since the chlorophyll concentration can be measured, it is possible to simultaneously measure information useful for analyzing the amount of dissolved oxygen caused by the aquatic organism to be measured.

  According to the invention described in claim 3, since it is possible to measure a change in the dissolved oxygen amount of the water filled in the sealed measurement space in a state where it is cut off from the outside, for example, the amount of oxygen caused by the bottom of the sea or the land After eliminating the influence of external factors such as production, the oxygen production and consumption or degradation rate by the floating, fixed or swimming aquatic organisms to be measured can be measured by changes in the amount of dissolved oxygen caused by them. It becomes possible.

  According to the invention of claim 4, in combination with the change in dissolved oxygen content, salinity, water temperature, which affects the production and consumption of oxygen or the rate of decomposition by the floating and fixed or swimming aquatic organisms to be measured, Since changes in light intensity and chlorophyll concentration can be measured, it is possible to simultaneously measure information useful for analyzing changes in the amount of dissolved oxygen caused by the organism to be measured.

  According to the fifth aspect of the present invention, since the water in the sealed measurement space can be exchanged quickly, the measurement work can be performed without waste.

  According to the sixth aspect of the present invention, it is possible to vent the gas in the sealed measurement space and prevent unnecessary ejection of water in the sealed measurement space. It becomes possible to keep the state of the better.

  According to the invention of claim 7, by substituting the bottom plate with a shielding film as necessary, seaweeds that are shallow areas on the coast of the sea, seaweeds such as coral reefs, seafloor fixed organisms such as corals, or inland water areas The amount of oxygen produced and consumed by lake-bottomed organisms that inhabit the bottom of the lake and can be sealed to the anchored base by a shielding membrane can be measured in the device or in a fixed state, making it possible to support various applications . Also, since the apparatus can be easily disassembled and assembled, it can be disassembled and transported for use in various places.

  According to the invention described in claim 8, since the posture of the device can be stably maintained, it is possible to prevent damage caused by the device overturning due to water flow and troubles in exchange of water in the sealed measurement space. It becomes possible.

  According to the ninth aspect of the present invention, the reduction in the amount of electricity stored in the storage battery, which is a power source for operating the apparatus, can be delayed, so that the apparatus alone can be used for a long time without supplying external power or replacing the storage battery. Can be measured.

  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

  FIG. 1 to FIG. 7 show an example of an embodiment of the apparatus for measuring respiration of aquatic aquatic organisms of the present invention.

  As shown in FIGS. 1 and 2, an underwater aquatic production respiration measuring device 10 is roughly composed of a frame 12, a measuring unit 14, and a power source / data processing unit 16, and is formed of a transparent member and sealed with water tightness. The measurement container 19 having the measurement space 30, the dissolved oxygen sensor 32 for detecting the dissolved oxygen amount of the water filled in the sealed measurement space 30, and the water filled in the sealed measurement space 30 are stirred in the sealed measurement space 30. A stirrer 74, an inlet 58 for injecting and blocking water outside the sealed measurement space 30 into the sealed measurement space 30, and draining and blocking water outside the sealed measurement space 30 in the sealed measurement space 30 And a discharge port 72.

  The frame 12 is assembled from pipes made of a non-corrosive material such as stainless steel, and is formed by joining together a first frame 12a and a second frame 12b assembled in a rectangular parallelepiped lattice. . The measuring unit 14 is fixed inside the first frame 12a assembled in the rectangular parallelepiped lattice, and the power source / data processing unit 16 is fixed inside the second frame 12b assembled in the rectangular parallelepiped lattice. Is done. A frame leg 12c is provided below the second frame 12b so as to match the bottom of the measurement unit 14 and extend downward.

  The measurement unit 14 includes a cylindrical main body 20, a bottom plate 22 that closes the bottom of the main body 20, and a dome-shaped lid 24 that closes the top of the main body 20. The main body 20, the bottom plate 22, and the lid 24 are each made of a transparent member. As these materials, specifically, synthetic resins such as acrylic resins can be used. However, the material of the main body 20, the bottom plate 22 and the lid 24 is not limited to this, and any material can be used as long as it has no water permeability and can withstand the water pressure at the place where the measuring apparatus 10 is installed. good.

  More specifically, a blind hole 20d is provided in a portion that contacts the first frame 12a on the outer surface of the main body 20, and the main body 20 is fixed to the frame 12 by a pin 31 that passes through the first frame 12a.

  Further, the upper flange 20 a of the main body 20 and the lower flange 24 a of the lid 24 are overlapped, and these are fixed by the bolts 25. An annular groove 20b is formed on the inner peripheral side of the bolt 25 position of the upper flange 20a of the main body 20, and an O-ring 26 is fitted in the annular groove 20b to contact the lower flange 24a of the lid 24. Watertightness is maintained between the main body 20 and the lid 24.

  In addition, a plurality of convex portions 20 f are formed on the lower side portion of the main body 20 so as to be spaced apart from each other in the circumferential direction. The convex portion 20 f has a downward bearing surface for fixing the fixed plate 22. The bottom plate 22 is sandwiched between the convex portion 20f and a pin 27 penetrating the side surface of the main body 20 below the convex portion 20f and fixed to the inside of the bottom portion of the main body 20.

  An annular groove 22 a is formed on the side surface of the bottom plate 22, and an O-ring 28 is fitted in the annular groove 22 a so as to be in contact with the inner surface of the main body 20, so that watertightness is provided between the main body 20 and the bottom plate 22. Retained.

  Thus, the main body 20, the bottom plate 22, and the lid 24 constitute the measurement container 19 having the sealed measurement space 30 with a certain volume.

  The main body 20 has a sensor therein. As the sensors, for example, a dissolved oxygen sensor 32 for detecting the amount of dissolved oxygen for determining the respiration rate of aquatic aquatic organisms, a salt sensor 34, a water temperature sensor 36, a photon sensor 38, a chlorophyll sensor 40 (hereinafter simply referred to as a sensor 32 or the like as appropriate). Can be used). In addition, necessary sensors can be added according to the measurement purpose.

  These sensors 32 and the like are fixed to the inside of the main body 20 without harming the water tightness of the sealed measurement space 30 by the support structure 41 shown in FIG. That is, the support structure 41 connects the sensor holders 42, 44, 46 that hold the sensor 32 and the like and the adjacent sensor holders 42, 44, 46, or the sensor holders 42, 44, 46 and the side surface of the main body 20. And a connecting arm 48 for connecting the two.

  Therefore, a through hole 20c for supporting one end of the connecting arm 48 is formed in the peripheral wall of the main body 20, and a screw hole 48a communicating with the through hole 20c is formed on the end surface of the connecting arm 48. A screw 49 is screwed into the hole 20c and the screw hole 48a. An annular groove 48b is formed around the screw hole 48a on the end face of the connecting arm 48, and an O-ring 50 is fitted in the annular groove 48b to contact the inner surface of the main body 20.

  Thus, each sensor can be supported by the main body 20 while maintaining water tightness.

  Since the sensor holders 42, 44 and 46 are necessarily supported by the adjacent sensor holder and the main body 20 by the connecting arm 48, the mounting strength can be increased.

  In addition, when a request for adding a sensor occurs, similarly, a sensor holder is added on the horizontal extension of the sensor holder 42 or the sensor holder 46, the added sensor holder and the sensor holder 42 or 46, and the added sensor. By connecting the holder and the side surface of the main body 20 by the two connecting arms 48, it becomes possible to cope with an increase in the number of sensors.

  Signals from the sensors are sent from the main body 20 to the power source / data processing unit 16 via the cable 51. The cable 51 enters and exits the main body 20 with watertightness by a cable holder 52 screwed into a screw hole 20e (see FIG. 2) provided on the side surface of the main body 20.

  As shown in FIG. 4, the cable holder 52 has a packing 53 (or an O-ring), and the packing 53 is in contact with the outer surface of the main body 20.

  In addition, as shown in FIG. 2, the inflow connector 56 and the discharge connector 70 that penetrate the side surface are provided on the side surface of the main body 20 so as to be separated from each other by approximately 180 degrees in the circumferential direction.

  The downstream end of the inflow connector 56 and the upstream end of the discharge connector 70 serve as the inlet 58 and the outlet 72 of the sealed measurement space 30, respectively.

  As shown in FIGS. 5 and 6, the outflow connector 56 includes a male connector 56a, a female connector 56b, and an end connector 56c, and a check valve 60 is attached between the male connector 56a and the end connector 56c.

  The check valve 60 includes a check valve mounting plate 62 and a valve body 64 made of an elastic member such as rubber, and a boss portion 64a of the valve body 64 passes through a center hole 62a of the check valve mounting plate 62. Is retained.

  The peripheral edge of the check valve mounting plate 62 is sandwiched between the male connector 56 a and the end connector 56 c of the outflow connector 56, and the peripheral edge of the valve body 64 is usually in close contact with the check valve mounting plate 62 due to its elasticity. However, the valve is opened by separating from the check valve mounting plate 62.

  Further, an O-ring 66 is fitted in an annular groove formed on the end face of the male connector 56a and is in contact with the check valve mounting plate 62, whereby the water tightness around the check valve mounting plate 62 and the male connector 56a is secured. Sex is preserved.

  A hose 73 is connected to the discharge connector 70, and a check valve 60 is provided at the tip of the hose 73.

  An inflow pump 54 is fixed to the frame 12 to allow the submergence to flow into the sealed measurement space 30 from the outside. The discharge port of the inflow pump 54 is connected to the inflow connector 56.

  A stirrer 74 is attached to the side surface of the main body 20 so that the propeller protrudes into the sealed measurement space 30. The stirrer 74 is also attached so as to maintain the watertightness of the main body 20.

  Furthermore, a two-way check valve 80 that can check back in two directions is provided at the top of the lid 24. As shown in FIG. 7, the two-way check valve 80 is composed of two upper and lower balls 82, a valve 81 including a connecting shaft 84 for connecting the two balls 82, and an upper and lower check valve 80 on which the opposing balls 82 can be seated. It is constituted by a valve seat 86 and a cap 88 having an upper opening.

  The ball 82 is made of acrylic resin, for example, and has a specific gravity slightly heavier than water. The check valve 80 always prevents the inflow of water into the sealed measurement space 30 from the outside, functions as a degassing of gas generated during measurement, and also enters the sealed measurement space 30 from the inflow pump 54. This is to prevent ejection when the inflow flow rate from the inflow port 58 and the discharge flow rate from the discharge port 72 cannot be matched when water is flowing in.

  A solar panel 90 is disposed on the upper surface of the power / data processing unit 16, and a power unit 92, a control unit, and a data logger unit 94 are disposed therein.

  The power supply unit includes a control unit connected to the storage battery and the solar panel 90.

  The control unit receives signals from the sensor 32 and the like, and controls the operations of the agitator 74 and the inflow pump 54.

  The data logger is composed of a memory card or the like, and sensor measurement data processed by the controller is recorded.

  In the underwater aquatic organism production respiration measuring apparatus 10 configured as described above, external water is injected into the sealed measurement space 30 from the inflow port 58 by periodically operating the inflow pump 54.

  Since the sealed measurement space 30 is kept watertight by the O-ring as described above, the water in the sealed measurement space 30 is discharged from the discharge port 72 via the check valve 60. Therefore, the water in the sealed measurement space 30 can be completely replaced by pouring a sufficient amount of water with the inflow pump 54 to replace the water in the sealed measurement space 30.

  At this time, when the water injection flow rate is large compared to the discharge flow rate and the water injection flow rate and the discharge flow rate are not matched in the sealed measurement space 30, the lower ball 82 is moved to the lower valve seat 86 in the two-way check valve 80. It can abut and prevent ejection (FIG. 7 (b)). In the two-way check valve 80, the upper ball 82 normally contacts the upper valve seat 86 to prevent the inflow of water from the outside, and the gas in the sealed measurement space 30 and the sealed measurement space 30 The gas introduced from the water or the air introduced when the water is dried due to a change in water level can be released (FIG. 7A).

  Thus, after the inflow pump 54 operates for a predetermined time, the rotation of the stirrer 74 is started by the operation signal from the controller unit, and the water in the sealed measurement space 30 is appropriately stirred. The rotation of the stirrer 74 is preferably controlled appropriately by the controller unit in order to keep the flow in the sealed measurement space 30 in a stable state.

  And the measurement is performed on the water filled in the sealed measurement space 30 isolated from the external water. Measurement signals from each sensor are taken into the control unit at predetermined time intervals or continuously and processed, and measurement data is recorded in the data logger unit.

  Oxygen, water temperature, salinity, and chlorophyll a content in the enclosed measurement space 30 that is completely cut off from the external water by repeating the above operations and performing measurement (aquatic organisms performing floating photosynthesis) Can be grasped continuously and continuously. Thereby, it becomes possible to measure the photosynthesis and respiration rate by living organisms and the environmental conditions that regulate the photosynthesis and respiration rate.

  Moreover, since the solar energy from the solar panel is used in addition to the storage battery as a power source, it becomes possible to perform measurement for a longer time than before.

  Further, in the present embodiment, a frame foot 12c is provided below the second frame 12b of the frame 12 so as to match a below-described bottom portion of the measurement unit 14 and extend downward, and the support point of the underwater aquatic organism production respiration measurement device 10 is provided. By increasing the spread, it is possible to stably install the aquatic aquatic organism production respiration measuring apparatus 10 while preventing the inclination and sedimentation of the aquatic aquatic organism production respiration measuring apparatus 10.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, an example in which the measurement unit 14 and the power source / data processing unit 16 are integrally formed as the underwater aquatic organism production respiration measurement apparatus 10 is described as an example. The power source / data processing unit 16 may be configured separately.

  Further, the bottom plate 22 can be removed from the main body 20 by removing the pins 27, and the inside and the outside can be shut off by installing a water-tight shielding film instead of the bottom plate 22. It is. As the shielding film, a sheet made of a stretchable material, for example, a synthetic resin sheet is used. When a shielding film is attached instead of the bottom plate, as shown in FIG. 8, the peripheral portion of the shielding film 97 formed in a substantially circular shape according to the shape and size of the main body 20 is the watertightness of the sealed measurement space 30. In order to maintain the property, it is fixed in close contact with the outer peripheral surface of the bottom of the main body 20 with a band. At an arbitrary position of the shielding film 97, a through hole is provided for allowing the fixing base portion 96 of the sea bottom / lake bottom fixing organism 95 to pass through. When the underwater aquatic organism production respiration measuring device 10 is installed, the through hole provided at an arbitrary position of the shielding film 97 is expanded to allow the sea bottom / lake bottom adhering organism 95 to pass through, and the through hole is located at the position of the adhering base 96. Adapted to. And the peripheral part of a through-hole is closely_contact | adhered and fixed to the fixed base 96 outer peripheral surface with the band 98, and the watertightness of the sealed measurement space 30 is ensured.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view (left part is sectional drawing, right part is front view) which shows an example of embodiment of the underwater aquatic organism production respiration measuring apparatus of this invention. It is a top view of the underwater aquatic organism production respiration measuring apparatus of FIG. It is an enlarged view showing the sensor support structure used with the underwater aquatic organism production respiration measuring apparatus of FIG. It is a decomposition | disassembly side view of the sensor connector used with the underwater aquatic organism production respiration measuring apparatus of FIG. It is a partial cross section side view of the inflow connector used with the underwater aquatic organism production respiration measuring apparatus of FIG. It is a disassembled perspective view of the inflow connector used with the underwater aquatic organism production respiration measuring apparatus of FIG. It is sectional drawing of the two-way check valve used with the underwater aquatic organism production respiration measuring apparatus of FIG. It is the schematic of the main-body part which shows an example of other embodiment of the underwater aquatic organism production respiration measuring apparatus of this invention. (A) is a schematic plan view of a main-body part. (B) is a schematic longitudinal cross-sectional view of a main-body part. It is a block diagram of the conventional oxygen consumption measuring device for the seabed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Underwater aquatic organism respiration measuring device 12 Frame 12c Frame foot 19 Measurement container 20 Main body 22 Bottom plate 24 Lid 30 Sealed measurement space 32 Dissolved oxygen sensor 34 Salinity sensor 36 Water temperature sensor 38 Photon sensor 40 Chlorophyll sensor 41 Support structure 42, 44, 46 Sensor holder 48 Connecting arm 54 Inflow pump 58 Inlet port 60 Check valve 72 Outlet port 74 Stirrer 80 Two-way check valve 97 Shielding membrane

Claims (9)

  A measurement container formed by a transparent member and having a sealed measurement space having water tightness, a dissolved oxygen sensor for detecting a dissolved oxygen amount of water filled in the sealed measurement space in the sealed measurement space, and the sealed A stirrer that stirs water filled in the measurement space, an inlet for water injection and shut-off to the sealed measurement space of water outside the sealed measurement space, and an outside of the sealed measurement space for water in the sealed measurement space An apparatus for measuring respiration of aquatic aquatic organisms, comprising an outlet for draining and blocking water.   The underwater aquatic organism respiration measurement apparatus according to claim 1, wherein one or more of a salinity sensor, a water temperature sensor, a photon sensor, and a chlorophyll sensor are provided in the sealed measurement space.   A measurement container formed by a transparent member and having a sealed measurement space having water tightness, a dissolved oxygen sensor for detecting a dissolved oxygen amount of water filled in the sealed measurement space in the sealed measurement space, and the sealed A stirrer that stirs water filled in the measurement space, an inlet for water injection and shut-off to the sealed measurement space of water outside the sealed measurement space, and an outside of the sealed measurement space for water in the sealed measurement space Data processing to control and record the measurement of the amount of dissolved oxygen caused by the production and consumption or decomposition of oxygen by the aquatic organisms to be measured in the water filled in the sealed measurement space And measuring the change in the amount of dissolved oxygen caused by the aquatic organism by placing or introducing the aquatic organism into the sealed measurement space. Underwater aquatic organisms production breath measurement device to.   In the sealed measurement space, one or more of a salinity sensor, a water temperature sensor, a photon sensor, and a chlorophyll sensor are provided, and the salinity in water, the water temperature, the light intensity, which affect the change in the amount of dissolved oxygen, The underwater aquatic organism respiration measurement apparatus according to claim 3, wherein any one or two or more changes in chlorophyll concentration are measured.   The underwater aquatic organism respiration measurement apparatus according to any one of claims 1 to 4, further comprising an inflow pump for pouring water outside the sealed measurement space into the sealed measurement space.   In the upper part of the measurement container, water outside the sealed measurement space is prevented from flowing into the sealed measurement space, and the gas in the sealed measurement space is discharged to the outside of the sealed measurement space, and the sealed measurement space The respiration measurement apparatus for underwater aquatic organism production according to any one of claims 1 to 5, further comprising a two-way check valve for preventing water from being ejected.   The measurement container is formed by a main body, a bottom plate or a shielding film that closes the bottom of the main body, and a lid that closes an upper part of the main body, and between the main body and the bottom plate or the shielding film, and the main body and the The underwater aquatic organism respiration measurement apparatus according to any one of claims 1 to 6, wherein the space between the lid and the lid is closed with water tightness.   The underwater aquatic organism production according to claim 7, further comprising: a frame for fixing the main body therein; and a frame foot extending to the same height as the bottom of the main body, the bottom plate or the shielding film. Respiratory measurement device.   The apparatus for measuring respiration of aquatic aquatic organisms according to any one of claims 1 to 8, wherein a solar cell is provided as an auxiliary power source.

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