An outdoor intelligent incubation nest system for inducing natural spawning behavior of demersal egg-guarding fishes

Abstract

This invention discloses an outdoor intelligent incubation fish nest system for inducing natural reproductive behavior in benthic egg-guarding fish. The system is assembled into an inverted U-shaped main body using water-resistant and corrosion-resistant pipes (different pipe diameters are selected for different benthic egg-guarding fish; 160mm diameter pipes are used for sand goby). With the pipe openings facing downwards, based on the thermodynamic principle of water (hot water rises, cold water sinks), this system helps maintain energy (water temperature) within the fish nest. The downward-facing pipe openings also reduce the impact of wind and current on the water temperature inside the fish nest. Furthermore, the downward-facing pipe openings reduce the intensity of light entering the inverted U-shaped biomimetic cave, creating a biologically adapted egg-guarding environment. The design incorporates a polyurethane insulation layer to effectively reduce heat loss. A 50mm multi-functional integrated pipe integrates micro-flow, constant temperature heating, oxygenation, and exhaust gas emission. The inner wall is roughened with an electric wire brush to improve the attachment rate of fish eggs. This fish nest is suitable for outdoor ponds and indoor water bodies that cannot be insulated. By continuously injecting warm water or using constant temperature heating, it can stably maintain an incubation water temperature of 22–26℃. The system is simple to operate and low in cost.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture engineering, specifically involving an outdoor intelligent incubation fish nest system that induces the natural reproductive behavior of benthic egg-guarding fish. In particular, it is an incubation system based on the principle of environmental bionics, which combines physical structure design with microenvironment control to induce the natural egg-guarding behavior of benthic egg-guarding fish such as the sand goby (Odontobutis obscura) and the goby (Gobiidae). Background Technology

[0002] Existing incubation methods have the following technical drawbacks: natural incubation methods have poor environmental adaptability. When traditional simple fish nests such as tiles and bamboo tubes experience a significant drop in water temperature, embryonic development often stagnates or the embryos die. In the natural environment, large temperature fluctuations due to diurnal temperature variations and extreme weather events (such as cold waves and heavy rain) significantly and adversely affect the hatching and survival rates of bottom-dwelling egg-guarding fish such as the sand goby. Studies have shown that excessively low or high water temperatures can lead to increased embryonic malformation rates, decreased larval vitality, and even embryonic death; the suitable incubation temperature range is typically 16°C to 28°C.

[0003] Indoor recirculating water hatching methods lack behavioral simulation. Existing indoor recirculating water systems cannot provide the cave effect and tactile stimulation required for male fish to guard their eggs, resulting in a lack of egg-guarding behavior, making it difficult to simulate the natural egg-guarding environment, and affecting hatching results.

[0004] Indoor incubation methods are energy-intensive. The high energy consumption of constant-temperature incubation tanks, coupled with significant equipment and labor costs, has resulted in persistently high prices for artificially bred fry of fish such as the sand goby, hindering its large-scale application. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides an outdoor intelligent incubation fish nest system that induces the natural reproductive behavior of benthic egg-guarding fish.

[0006] The technical solution of this utility model is as follows: An outdoor intelligent hatching fish nest system for inducing natural reproductive behavior of benthic egg-protecting fish, comprising: an inverted U-shaped bionic cave with biological adaptability, assembled by water-resistant corrosion-resistant pipes, with the pipe opening facing downwards, and the inner wall of the pipe being mechanically processed to form an egg attachment surface with Ra≥12.5μm; the vertical branch pipe (201) of the inverted U-shaped bionic cave integrates an environmental control module, the environmental control module including a micro-flow water injection system, a temperature control heating system and a micropore oxygenation system; the set value of the temperature control heating system is 24±1℃.

[0007] The inverted U-shaped bionic cave is assembled from water-resistant and corrosion-resistant pipes through tee and cross joints and 90° elbows. Its outer surface is covered with a 20-30mm thick closed-cell polyurethane insulation layer with a closed-cell rate of ≥90% and a density of 35-45kg / m³.

[0008] The temperature control heating system includes a constant temperature heating rod (203) with a power of 50~100W and a temperature control switch connected thereto; the micro-flow water injection system includes a water pipe (202) for connecting to a warm water source and a valve for controlling the flow rate.

[0009] The vertical branch pipe (201) is a multi-functional integrated pipe, which is equipped with the water pipe (202) of the micro-flow water injection system, the heating rod (203) of the temperature control heating system, the oxygenation pipe (206) of the micropore oxygenation system, and the air stone (205); the vertical branch pipe (201) also functions as an exhaust port.

[0010] The horizontal, vertical, and right-angle bend sections of the inverted U-shaped bionic cave are all covered with a polyurethane insulation layer with a closed-cell rate of ≥90%.

[0011] The beneficial effects of this utility model are as follows: the biomimetic design with the inverted U-shaped pipe opening facing downwards reduces the entry of light and the influence of airflow, creating a protective environment for the eggs; the roughened inner wall improves the attachment rate of fish eggs; the micro-flow, heating, oxygenation, and exhaust functions are integrated into a single vertical pipe, making operation simple; the polyurethane insulation layer reduces heat loss and can stably maintain an incubation water temperature of 22~26℃, making it suitable for outdoor ponds and other habitats, and it is low in cost. Attached Figure Description

[0012] Figure 1: Schematic diagram of the three-dimensional structure of the biomimetic cave module and the environmental control module;

[0013] Figure 2: Schematic diagram of the biomimetic cave module and the environmental control module;

[0014] Figure 3: Side view of the biomimetic cave module and the environmental control module;

[0015] Figure 4: Side view of the biomimetic cave module and environmental control module including the hoisting and polyurethane insulation layer;

[0016] Figure 5: Schematic diagram of polyurethane insulation layer thickness;

[0017] Figure 6: Cross-sectional view of the environmental control module;

[0018] Figure 7: Partial cross-sectional view of the environmental control module. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in further detail with reference to the accompanying drawings. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] like Figures 1 to 7 As shown, taking the sand goby as an example, this system includes a biomimetic cave module, an environmental control module, and a heat preservation and hoisting module.

[0021] Bionic Cave Module: Based on the size of benthic egg-guarding fish, a suitable pipe diameter was selected. For the sand goby, 160 mm water-resistant corrosion-resistant pipes were used. An inverted U-shaped structure was constructed using one 160×50 mm tee connector (101), two 160 mm four-way connectors (102), two 30 mm straight pipe sections connecting the tee and four-way connectors (103), six 300 mm straight pipe sections (104), and six 90° right-angle elbows (105). This bionic cave incorporates biological induction functions. Based on the thermodynamic principles of water, hot water rises and cold water falls, which is beneficial for maintaining energy (water temperature) within the fish nest system. The downward-facing pipe opening reduces the impact of wind and current on the water temperature inside the fish nest. The downward-facing pipe opening also reduces the intensity of light entering the inverted U-shaped bionic cave, creating a biologically adapted egg-guarding environment. The inner wall was roughened with an electric wire brush, forming an egg attachment surface with Ra≥12.5 μm, creating a tactile stimulation similar to a natural environment.

[0022] Environmental Control Module: The environmental control module, integrated into a 50 mm branch pipe (201) and a 160×50 mm tee (101), comprises three parts: a micro-flow water injection system; a temperature-controlled heating system with a set value of 24±1°C; and a micro-pore oxygenation system with an aperture of 0.1~0.3 mm. The 50 mm multi-functional vertical integrated pipe is used for injecting warm or ambient temperature water. The warm water temperature is 22~26°C (inlet pipe 202), temperature-controlled heating (heating rod 203 and wire 204), micro-pore oxygenation (air stone 205 and oxygenation pipe 206), and exhaust gas discharge. Operation is simplified, with a single pipe realizing four functions: water flow, oxygenation, temperature-controlled heating, and exhaust gas. The air stone, heating rod, and inlet pipe are inserted into the bottom 160×50 mm tee through the 50 mm pipe.

[0023] Insulation and hoisting module: When inserting the 50 mm pipe into the bottom 160×50 mm tee, apply pipe-specific adhesive to the connection point before assembling. After assembly, reinforce the connection between the outer pipe and the 50 mm pipe with reinforcing adhesive to ensure the stability of the hoisting system. Two 1.5 m plastic ropes are used. Fold the plastic ropes in half, tie a rope knot, and loop them 15 mm below the diameter 50 mm straight pipe opening. Tighten the ropes. Secure four plastic ropes to the 50 mm diameter straight pipe opening 10 mm below the diameter 50 mm straight pipe opening using 50 mm straight pipe clamps (301). Keep the four plastic ropes evenly distributed. When pulling up, keep each pipe opening horizontal. Leave 50 mm of plastic rope for suspending the fish nest on the steel wire rope spanning the pond. Apply polyurethane foam material on-site with a thickness ≥20 mm. After curing, trim the surface.

Claims

1. An outdoor intelligent incubation nest system for inducing natural spawning behavior of demersal egg-guarding fish, characterized in that, include: The inverted U-shaped biomimetic cave, which is biologically adaptable, is assembled with water-resistant and corrosion-resistant pipes. The pipe opening faces downward, and the inner wall of the pipe is machined to form an egg attachment surface with Ra≥12.5 μm. The vertical branch pipe (201) of the inverted U-shaped biomimetic cave integrates an environmental control module, which includes a micro-flow water injection system, a temperature control heating system, and a micropore oxygenation system. The temperature control heating system is set to 24±1°C.

2. The system of claim 1, wherein, The inverted U-shaped bionic cave is assembled from water-resistant and corrosion-resistant pipes through tee and cross joints and 90° elbows. Its outer surface is covered with a 20-30 mm thick closed-cell polyurethane insulation layer with a closed-cell rate of ≥90% and a density of 35-45 kg / m³.

3. The system of claim 1, wherein, The temperature control heating system includes a constant temperature heating rod (203) with a power of 50~100 W and a temperature control switch connected thereto; the micro-flow water injection system includes a water pipe (202) for connecting to a warm water source and a valve for controlling the flow rate.

4. The system of claim 1, wherein, The vertical branch pipe (201) is a multi-functional integrated pipe, which is equipped with the water pipe (202) of the micro-flow water injection system, the heating rod (203) of the temperature control heating system, the oxygenation pipe (206) of the micropore oxygenation system, and the air stone (205); the vertical branch pipe (201) also functions as an exhaust port.

5. The system of claim 1, wherein, The horizontal, vertical, and right-angle bend sections of the inverted U-shaped bionic cave are all covered with a polyurethane insulation layer with a closed-cell rate of ≥90%.

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