Crayfish hole entering behavior measuring device

Abstract

The utility model relates to a crayfish hole entering behavior measuring device which comprises a throwing pool, an artificial cave, a filling area, an observation pool and a recording system, the behavior of crayfish near the artificial cave is observed by changing the environment variable of the artificial cave, and the living habits and preferences of the crayfish are obtained. The device has the advantages that the structure is simple, variables can be adjusted according to actual requirements, meanwhile, a plurality of test caves can be formed in one device at the same time, enough test samples are provided, and therefore the reliability of test results is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of shrimp behavior measurement, in particular to a measurement device for the hole-entering behavior of crayfish. Background Technique

[0002] During the rapid development of the crayfish aquaculture industry, there are problems such as the lag in basic research on biological characteristics, aquaculture technology, and improved variety breeding, which restricts the development of the industry.

[0003] Procambarus clarkii is aggressive by nature, likes to live in caves or hide during the day, forages at night, and especially likes to live in caves during its breeding process; creating a suitable habitat space for Procambarus clarkii to live in caves will be conducive to improving its survival rate and breeding efficiency.

[0004] To improve the breeding efficiency of crayfish, increase the yield and quality of shrimp fry, an artificial cave can be set up to provide a good habitat and breeding environment for crayfish. However, at present, there is no accurate understanding of the hole-digging and hole-entering habits of crayfish, and technical parameters such as the orientation, material, and distance from the water surface of the artificial cave for crayfish are not clear. Content of the Utility Model

[0005] The applicant of the present utility model aims at the above-mentioned shortcomings in the existing production technology, and provides a measurement device for the hole-entering behavior of crayfish with a reasonable structure, which is suitable for measuring the hole-digging and hole-entering habits of crayfish, so as to provide technical parameters for the artificial breeding and ecological aquaculture of crayfish and contribute to the high-quality development of the crayfish industry.

[0006] The technical solution adopted by the present utility model is as follows:

[0007] A measurement device for the hole-entering behavior of crayfish includes a release pool and an observation pool. A behavior test component is connected between the release pool and the observation pool, and a recording system for observing the hole-entering behavior is further included.

[0008] The behavior test component includes:

[0009] An artificial cave, with both ends connected to the release pool and the observation pool respectively.

[0010] A filling area, which is the area formed between the pool walls of the release pool and the observation pool. A partition is provided in the filling area to divide the filling area into an inner side and an outer side. The artificial cave is embedded in the filling area.

[0011] The variables of the behavior test component include the structure of the artificial cave and the filling material in the filling area.

[0012] As a further improvement of the above technical solution:

[0013] The release pool and the observation pool are concentrically arranged, and the artificial cave radiates from the release pool towards the observation pool.

[0014] The release pond is provided with several side walls, and a rectangular array of artificial caves is arranged on each side wall; a spacing is reserved between the artificial caves and the bottom of the measuring device.

[0015] Aquatic plants are placed in the release pond, and the height of the aquatic plants is higher than or equal to the entrance height of the top artificial cave.

[0016] The two ends of the artificial cave are smeared with soil.

[0017] Each side wall of the release pond is correspondingly provided with a filling area, and the fillers in each filling area are different.

[0018] The water temperature for release is room temperature.

[0019] The recording system includes a camera, which is supported and limited above the observation pond and is used to monitor the behavior of crayfish entering and leaving the cave.

[0020] The beneficial effects of the present utility model are as follows:

[0021] By filling water or soil in different filling areas in the present utility model, it is judged whether crayfish like to be close to water or soil in the cave; through long-term observation, the habit observation of crayfish has strong credibility.

[0022] By placing aquatic plants in the release area, crayfish can reach the artificial caves at each layer, and it is judged the preference of crayfish for the artificial caves at the upper, middle and lower layers, providing parameters for the setting of the position of the artificial caves.

[0023] By replacing different materials of the artificial cave, it is judged the preference of crayfish for the material of the artificial cave, laying a foundation for large-scale production of artificial caves.

[0024] By artificially adjusting external conditions such as water temperature and light intensity, the preference of crayfish for entering the cave under different temperature and light conditions is simulated, and the biological characteristics of crayfish in different seasons are explored, providing a basis for the breeding and reproduction techniques of crayfish in different seasons.

[0025] By smearing soil at the cave entrance, it is judged the preference of crayfish for the cave entrance when entering the cave, providing a basis for the subsequent setting of the artificial cave entrance.

[0026] When crayfish enter an unsuitable cave, the situation of crayfish exiting can be observed from the entrance to explore the living habits of crayfish.

[0027] By releasing crayfish of different specifications and genders, the habits of crayfish of different specifications and genders entering the cave can be observed.

[0028] Through the real-time monitoring recording system, the observation intensity of the test personnel can be reduced, and after the observation, analysis and judgment can be carried out through video playback. Description of the Drawings

[0029] Figure 1 This is a schematic diagram of the overall structure of the test device of the present utility model.

[0030] Among them: 1. Feeding pool; 2. Artificial cave; 3. Inner side of the filling area; 4. Outer side of the filling area; 5. Observation pool; 6. Recording system. Specific embodiments

[0031] The following combines with the attached drawings to illustrate the specific embodiments of the present utility model.

[0032] As Figure 1 shown, the crayfish hole-entry behavior measurement device of this embodiment includes a feeding pool 1 and an observation pool 5. A behavior test component is connected between the feeding pool 1 and the observation pool 5. It also includes a recording system 6 for observing the hole-entry behavior.

[0033] The behavior test component includes:

[0034] An artificial cave 2, with both ends respectively connected to the feeding pool 1 and the observation pool 5.

[0035] A filling area, which is the area formed between the pool walls of the feeding pool 1 and the observation pool 5. A partition is provided in the filling area to divide the filling area into an inner side and an outer side. The artificial cave 2 is embedded in the filling area.

[0036] The variables of the behavior test component include the structure of the artificial cave 2 and the filling material in the filling area.

[0037] The feeding pool 1 and the observation pool 5 are concentrically arranged, and the artificial cave 2 radiates from the feeding pool 1 towards the observation pool 5.

[0038] The feeding pool 1 has several side walls, and a number of artificial caves 2 are arranged in a rectangular array on each side wall; a spacing is reserved between the artificial cave 2 and the bottom of the measurement device.

[0039] Aquatic plants are placed in the feeding pool 1, and the height of the aquatic plants is higher than or equal to the entrance height of the top artificial cave 2.

[0040] The two ends of the entrance of the artificial cave 2 are smeared with soil.

[0041] Each side wall of the feeding pool 1 corresponds to a filling area, and the filling materials in each filling area are different.

[0042] The feeding water temperature is room temperature.

[0043] The recording system 6 includes a camera, and the camera is supported and limited above the observation pool 5 for monitoring the behavior of crayfish entering and leaving the cave.

[0044] The specific structure and working principle of the present utility model are as follows:

[0045] With the delivery pool 1 as the center, multiple artificial caves 2 are opened around the delivery pool 1. In one embodiment of the present invention, the delivery pool 1 is set to be rectangular, and multiple artificial caves 2 are opened in a rectangular array on each side wall of the rectangular delivery pool 1, for example, four, nine, or sixteen artificial caves 2 are opened on the same side wall.

[0046] The artificial cave 2 has a certain length, and an observation pool 5 is connected to the end of the artificial cave 2 away from the delivery pool 1. The middle section of the artificial cave 2 is filled with water or soil, and the part between the delivery pool 1 and the observation pool 5 is the filling area, and the artificial cave 2 is embedded in the filling area.

[0047] As crayfish crawl from stocking pond 1 into artificial burrow 2, the number of crayfish that ultimately emerge will be affected by the material and structure of artificial burrow 2. For example, if crayfish are more adapted to the environment of a particular burrow and are reluctant to exit, then that burrow type is considered to be in line with the crayfish's preference. If crayfish exit artificial burrow 2 through its entrance or exit, then that burrow type is considered unsuitable for the crayfish.

[0048] Therefore, the material, structure and environment of the artificial cave 2 can screen out the preferences of crayfish.

[0049] A 15-20cm gap is reserved between the artificial caves 2 and the bottom of the entire device, i.e., the bottom of the drop tank 1. Adjacent artificial caves 2 are spaced 10cm apart. Because the cave itself and the infill area are the primary variables in the environment of each artificial cave 2, optional variables for artificial caves 2 include: entrance diameter, depth, material, entrance environment, and infill area material. Materials for artificial caves 2 include PVC, bamboo tubes, or precast cement tubes.

[0050] For ease of layout, the entire measuring device has a circular outer wall. Baffles extend outward from the four corners of the drop pool 1 and are connected to the outer wall, separating the four groups of artificial caves 2 into filling areas 1, 2, 3, and 4. Each filling area is divided into an inner and outer side. The inner and outer sides of each filling area are also separated by partitions, and both sides can be filled with water or soil as needed. When draining water, the water level is the same as that of the drop pool 1. When sealed with soil, the horizontal width of the soil is 10-30 cm.

[0051] Since the outer wall of the observation pool 5 is an arc and the inner wall is a plane of the filling area, each observation pool 5 is semicircular. The outer walls of the four observation pools 5 form a circle.

[0052] A recording system 6 is also provided on the side of the overall device. The recording system 6 uses a camera to long-term shoot the crayfish's entering, exiting and roosting behaviors.

[0053] Put the above structure into actual use, and the following gives two specific embodiments as examples for illustration:

[0054] Embodiment 1

[0055] The release pool 1 is a square pool with a side length of 50 cm and a depth of 50 cm; the entrance of the artificial cave 2 is connected to the release pool 1, arranged in 3 layers vertically, and 3 caves are arranged on each side of each layer; the diameter of the entrance of the artificial cave 2 is 8 cm, the depth is 80 cm, the material is PVC, and the entrance is smeared with soil; the height of the lower layer of the artificial cave 2 from the bottom of the device is 15 cm, and the distance between the artificial caves 2 is 10 cm. The filling area is divided into the inner side and the outer side, and water or soil can be filled in the filling area as needed. The artificial cave 2 is embedded in the filling area;

[0056] The filling area is divided into Filling Area 1, Filling Area 2, Filling Area 3, and Filling Area 4,

[0057] Both the inner side and the outer side of Filling Area 1 are filled with soil,

[0058] The inner side of Filling Area 2 is filled with soil and the outer side is filled with water,

[0059] The inner side of Filling Area 3 is filled with water and the outer side is filled with soil,

[0060] Both the inner side and the outer side of Filling Area 4 are filled with water.

[0061] The observation pool 5 is connected to the exit of the artificial cave 2. The artificial cave 2 is sealed with soil in the observation pool 5, and the horizontal width of the soil is 20 cm when sealing. The recording system 6 includes a camera, a memory, and a support rod. The camera is located above the observation pool 5 and is used to monitor the behavior of the crayfish entering or exiting the release pool 1 and the observation pool 5.

[0062] The method for measuring the behavior of aquatic animals using the above structure includes the following steps:

[0063] S1: Fill the release pool 1 with water to a predetermined water level, place waterweeds such as Alternanthera philoxeroides, so that the height of the waterweeds reaches the entrance of the uppermost artificial cave 2 without blocking the entrances of each artificial cave 2, the water temperature is 25 ± 1 °C, and it is illuminated with natural light;

[0064] S2: Put 100 crayfish with a specification of 40 - 50 g into the release pool 1, including 50 male crayfish and 50 female crayfish, and observe for 7 days;

[0065] S3: Statistically analyze the behavior and spatio-temporal distribution status of the crayfish.

[0066] The observation results show that after the entrance of the artificial cave 2 is smeared with mud, it is easier for crayfish to enter. In the initial stage of putting them in, the crayfish randomly enter each cave, and then some crayfish in the caves withdraw to the release pool 1. After repeatedly entering and withdrawing, it gradually stabilizes. After 3 days, 70% of the crayfish enter the filling area, which is an artificial area filled with mud, and 90% of the crayfish enter the artificial cave 2 in the middle and lower layers. There is no obvious difference in the cave-entering habits between male and female crayfish.

[0067] Example 2

[0068] The release pool 1 is a square pool with a side length of 50 cm and a depth of 50 cm. The entrance of the artificial cave 2 is connected to the release pool 1 and is arranged in 3 layers vertically. There are 3 caves on each side of each layer. The diameter of the entrance of the artificial cave 2 is 8 cm and the depth is 80 cm. Half of the material of the artificial cave 2 is PVC and the other half is a through bamboo tube. The entrance of the cave is smeared with mud. The height of the lower layer of the artificial cave 2 from the bottom of the device is 15 cm, and the distance between the artificial caves 2 is 10 cm.

[0069] The filling area is filled with mud. Among them, the artificial caves 2 in filling area one and filling area two are made of PVC, and the artificial caves 2 in filling area three and filling area four are made of through bamboo tubes.

[0070] The observation pool 5 is connected to the exit of the artificial cave 2. In the observation pool 5, the artificial cave 2 is sealed with mud, and the sealing thickness is 20 cm when sealing. The recording system 6 includes a camera, a memory and a support rod. The camera is located above the observation pool 5 and is used to monitor the behavior of crayfish entering or exiting the release pool 1 and the observation pool 5.

[0071] The method for measuring the behavior of aquatic animals using the above structure includes the following steps:

[0072] S1: Fill the release pool 1 with water to a predetermined water level, place waterweeds such as Alternanthera philoxeroides, so that the height of the waterweeds reaches the entrance of the uppermost artificial cave 2 without blocking the entrances of each artificial cave 2. The water temperature is 24 ± 1 °C, and natural light is used for lighting.

[0073] S2: Put 100 crayfish with a specification of 40 - 50 g into the release pool 1, including 50 male crayfish and 50 female crayfish, and observe for 7 days.

[0074] S3: Statistically analyze the behavior and spatio-temporal distribution status of the crayfish.

[0075] The observation results show that 70% of the crayfish enter the bamboo artificial cave 2, and the other 30% of the crayfish enter the PVC artificial cave 2, indicating that the crayfish prefer the bamboo artificial cave 2.

[0076] The technical solutions of the embodiments in the present utility model can be combined, and the technical features in the embodiments can also be combined to form a new technical solution. Structures that are not mentioned in the embodiments but can achieve the relevant functions in the embodiments are prior art.

[0077] The above description is an explanation of the present utility model, not a limitation thereof. The scope defined by the present utility model is referred to the claims. Any form of modification can be made within the protection scope of the present utility model.

Claims

1. A crayfish burrowing behavior measurement device, characterized in that: It includes a release pool (1) and an observation pool (5). A behavior test component is connected between the release pool (1) and the observation pool (5). It also includes a recording system (6) for observing the behavior of entering the hole. The behavior test component includes: An artificial cave (2) with two ends respectively connected to the release pool (1) and the observation pool (5). A filling area, which is the area formed between the pool walls of the release pool (1) and the observation pool (5). A partition is provided in the filling area to divide the filling area into an inner side and an outer side. The artificial cave (2) is embedded in the filling area. The variables of the behavior test component include the structure of the artificial cave (2) and the filling material in the filling area.

2. The crayfish hole-entry behavior measurement device according to claim 1, characterized in that: The release pool (1) and the observation pool (5) are concentrically arranged, and the artificial cave (2) radiates from the release pool (1) towards the observation pool (5).

3. The crayfish hole-entry behavior measurement device according to claim 2, wherein: The release pool (1) has several side walls, and several artificial caves (2) are arranged in a rectangular array on each side wall; a spacing is reserved between the artificial cave (2) and the bottom of the measuring device.

4. The crayfish burrowing behavior measuring device according to claim 1, characterized in that: Aquatic plants are placed in the release pool (1), and the height of the aquatic plants is higher than or equal to the entrance height of the top artificial cave (2).

5. The crayfish hole-entry behavior measurement device according to claim 1, characterized in that: The two ends of the entrance of the artificial cave (2) are smeared with mud.

6. The crayfish hole-entry behavior measurement device according to claim 3, wherein: Each side wall of the release pool (1) corresponds to a filling area, and the filling materials in each filling area are different.

7. The crayfish hole-entry behavior measurement device according to claim 1, characterized in that: The released water temperature is room temperature.

8. The crayfish hole-entry behavior measurement device according to claim 1, characterized in that: The recording system (6) includes a camera, and the camera is supported and limited above the observation pool (5) for monitoring the behavior of the crayfish entering and leaving the hole.

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