Novel basket-type intensive culture mode for river crabs and special river crab culture basket for novel basket-type intensive culture mode
Through the new model of river crab basket-style intensive cultivation, special river crab breeding baskets are used to breed single or two river crabs in ponds or rice fields, which solves the problem that the existing technology is difficult to improve the yield and quality of river crabs, and achieves efficient and sustainable River crab farming meets the market's demand for high-quality river crabs.
Patent Information
- Application Number
- CN202411504802.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-27
- Publication Date
- 2024-12-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing river crab breeding model is difficult to effectively improve the yield and quality of river crabs, especially due to the limitations of technology and management levels, which lead to lower yields and market supply shortages.
Adopt a new river crab basket-style intensive cultivation model, and use a special river crab breeding basket to breed single or two river crabs in ponds or rice fields. By designing a unique basket body and basket cover structure, it provides a suitable ecological environment and combines the soil. Use it to imitate the natural growth environment of river crabs to achieve precise management and efficient breeding.
It improves the survival rate and quality of river crabs, reduces breeding costs, increases economic benefits, meets the market's demand for high-quality river crabs, and is suitable for large-scale and factory-based breeding.
Smart Images
Figure CN119111437A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a river crab breeding mode, in particular to a new river crab basket-type intensive breeding mode and a special river crab breeding basket. Background Art
[0002] River crab, scientifically known as Chinese mitten crab, is an aquaculture species with important economic value. In recent years, with the improvement of people's living standards and the increase in demand for high-quality aquatic products, the river crab farming industry has developed rapidly. River crabs have the characteristics of fast growth, strong adaptability, and delicious meat. Their life cycle includes stages such as zoea, megalopa, juvenile crabs and adult crabs. The life span of river crabs is related to their gender, the time of gonadal maturation and the ecological environment. The general life span of river crabs is about 2 years. Calculated from the juvenile stage, the life span of male river crabs is about 22 months, and the life span of female river crabs is usually 24 months. After completing the task of reproducing offspring, they tend to die. From juvenile crabs to adult river crabs, they usually molt 5 times a year. The specific time is roughly the first molting around Qingming, the second molting around Grain Rain, the third molting around Grain Full, the fourth molting around the Summer Solstice, and the fifth molting around the Beginning of Autumn. River crabs like to live in waters with fresh water and abundant aquatic plants. The main mode of river crab farming is pond farming, which has the advantages of low investment and convenient management; lake farming is the use of natural lakes for river crab farming, which has the advantages of good ecological environment and high yield, but it is difficult to manage; rice field farming is a new model that has emerged in recent years. It combines river crab farming with rice planting to achieve dual use of water and double harvest of land, with the effect of both ecological and economic benefits. However, rice field farming also has many drawbacks. For example, rice field crab farming is a new model with high technological content and strong comprehensiveness. It requires high business quality of practitioners, including technical level and management ability. If the breeder lacks technical experience and management ability, it will be difficult to achieve the benefits of rice field crab farming, resulting in reduced production and even losses.
[0003] In recent years, with the improvement of people's living standards, river crabs, as a high-end aquatic product, have seen a continuous expansion in the market. River crabs are not only a popular dish in the catering market, especially in autumn, when the consumption of river crabs has increased significantly, but are also a popular choice in the gift market. At the same time, people's requirements for the quality of river crabs are also increasing. Consumers have higher and higher requirements for the quality, taste and safety of river crabs, and the market demand for high-end river crabs has grown rapidly. Since the price of river crabs is greatly affected by factors such as season, output and quality. Generally speaking, autumn is the peak season for river crabs to be listed, and the price is relatively low; while in spring and winter, due to the decrease in river crab output, the price is relatively high. In short, the current market for river crabs is in short supply, and there is an urgent need to expand the output of river crabs and improve their quality to meet people's growing consumer demand. However, the current river crab farming is restricted by technology, area, and especially the farming model. It is unrealistic to significantly increase the output and quality in a short period of time. Therefore, it is very necessary to innovate and break through the farming model, and it has become an inevitable requirement to form a new growth point for river crab farming from scale to quality. Summary of the invention
[0004] The present invention aims to continuously explore new technologies for river crab breeding, innovate new breeding models, promote the development of key technologies in the industry, and introduce new opportunities and vitality for river crab breeding. The technical solution adopted by the present invention is: a new model of river crab basket intensive breeding, characterized in that: a special river crab breeding basket is used, some soil is placed at the bottom, and the lower part of the special river crab breeding basket is placed in water in a pond, rice field or water trough, and a single or two similar river crabs are cultured in a basket.
[0005] A special river crab breeding basket described in a new model of river crab basket-type intensive breeding, mainly consists of a basket body and a basket cover, characterized in that: the basket body is a one-way open conical cylindrical shell with a thick upper part and a thin lower part, the outer edge of the thick upper opening is curled outwardly toward the basket body into a semicircular shape, and the thin lower basket bottom is a circular flat plate, a section of mud-containing light board wall of a certain height is arranged around the shell wall adjacent to the basket bottom, and a section of light-preventing light-escaping board wall of a certain height is also arranged around the shell wall near the opening, and circular or rectangular water-permeable holes are evenly distributed in the middle section of the shell wall; the basket cover is disc-shaped, and its diameter matches the diameter of the thick opening on the basket body, and its outer edge is curled toward the center direction into a semicircular shape that can fit and clamp with the semicircular upper opening of the basket body, and a number of openings of the same length are evenly opened radially from the center point of the basket cover to the periphery, so that it presents a funnel-shaped barbed feed feeding port facing the same direction as the curling of the outer edge.
[0006] As the core facility of the new model of intensive breeding of river crabs, the special river crab breeding basket adopts a unique design concept. It is made of durable, anti-aging and environmentally friendly materials, with the following considerations and advantages:
[0007] First, the special river crab breeding basket is designed to be a tapered cylindrical shell that is wide at the top and narrow at the bottom in order to ensure smooth water flow between adjacent special river crab breeding baskets and prevent fighting between river crabs in adjacent special river crab breeding baskets;
[0008] Second, the outer edge of the basket cover is curled toward the center to form a semicircular shape that can fit tightly with the semicircular upper mouth of the basket body, so that the special river crab breeding basket can be installed easily and quickly and can prevent river crabs from escaping;
[0009] Third, the bottom of the basket is designed to be a round flat plate, and a mud-containing smooth board wall of a certain height is arranged around the shell wall adjacent to the bottom of the basket, so as to contain some mud at the bottom of the special river crab breeding basket, which not only has the function of stabilizing the special river crab breeding basket by the weight of the mud, but more importantly, is conducive to the river crabs to dig nests, sharpen claws and shed shells, and eat mud to supplement calcium;
[0010] Fourth, a certain height of anti-light escape board wall is also set around the shell wall near the opening to prevent river crabs from escaping;
[0011] Fifth, the middle section of the shell wall is evenly distributed with circular or rectangular water-permeable holes, which can ensure the passage of water and facilitate the climbing movement of river crabs;
[0012] Sixth, several openings of the same length are evenly opened radiating from the center point of the basket cover toward the periphery, so that it presents a funnel-shaped barbed feed feeding port facing in the same direction as the outer edge curling. This design can facilitate feeding and prevent river crabs from escaping.
[0013] In short, the design of the above-mentioned special river crab breeding basket can provide river crabs with a comfortable and safe ecological environment that simulates a suitable ecological environment for the growth of river crabs, so as to facilitate the smooth development of the new model of river crab basket intensive breeding.
[0014] The technical process design of the new model of intensive breeding of river crabs in baskets is:
[0015] (1) Site selection and renovation of river crab ponds: First, select and renovate the surrounding environment of ponds, rice fields or water troughs suitable for river crab farming, as well as the farming factors such as water quality, water depth, and drainage and irrigation systems.
[0016] If the special river crab breeding basket is to be raised in a pond, the boundary of the area where it is set and the bottom of the pond should be trimmed to ensure that the special river crab breeding basket is neatly placed and at the same depth, so as to facilitate feeding, disease prevention and other breeding work. At the same time, anchor the iron column by the pond and set several parallel wires to be tightened horizontally. The special river crab breeding basket is suspended and fixed between the parallel wires through the part where the outer edge of the opening of the special river crab breeding basket is curled outward into a semicircular shape, so as to suspend the special river crab breeding basket above the water surface at a certain height, and at the same time ensure the stable positioning of the special river crab breeding basket, so as not to be blown away or messed up by wind and waves. In addition, some soil should be placed at the bottom of the special river crab breeding basket, and part of the special river crab breeding basket should be placed in the water. This can not only stabilize the special river crab breeding basket through the weight of the soil, but more importantly, it is conducive to the river crabs to dig nests, sharpen claws and shed shells, and eat soil to supplement calcium.
[0017] If crabs are cultured in rice fields, the boundaries of the crab culture baskets in the rice fields and the bottom of the excavated crab culture trenches should be trimmed to ensure that the crab culture baskets are neatly arranged and have the same depth, and that part of the crab culture baskets are placed in the water and part is above the water surface, so as to facilitate feeding, disease prevention and other breeding work. At the same time, some soil should be placed at the bottom of the crab culture baskets, which can not only stabilize the crab culture baskets through the weight of the soil, but more importantly, it is conducive to the crabs to dig nests, sharpen their claws and shed their shells, and eat soil to supplement calcium.
[0018] If river crabs are cultured in a water flow tank, reasonable water flow, density and other conditions should be arranged according to the facilities. At the same time, some soil should be placed at the bottom of the special river crab culture basket, and part of the special river crab culture basket should be placed in the water. This can not only stabilize the special river crab culture basket through the weight of the soil, but more importantly, it is conducive to the river crabs to dig nests, sharpen their claws and shed their shells, and eat soil to supplement calcium.
[0019] (2) Customization of special river crab breeding baskets: Customization of special river crab breeding baskets suitable for river crab breeding;
[0020] (3) Crab seed placement: according to the relevant suitable pond, rice field or water channel conditions, put some soil at the bottom of the special river crab breeding basket, place part of the special river crab breeding basket in water, and place one or two one-year-old crab seedlings or one two-year-old crab seedling of similar individuals in the special river crab breeding basket;
[0021] (4) River crab farming: The new model of intensive farming in special river crab farming baskets basically follows the technical requirements of ordinary river crab farming, strengthens management, and feeds mixed feed to the feeding port on the special river crab farming baskets from 2 to 5 pm based on the habit of river crabs to eat mainly at night;
[0022] (5) Disease prevention and treatment of river crabs: In view of the high density of river crabs in the new model of intensive breeding of river crabs in special baskets, special disease prevention measures should be formulated and implemented in a timely manner, and observation should be strengthened. If sick crabs are found, they should be treated immediately.
[0023] (6) Harvesting and overwintering of river crabs: In autumn, river crabs are harvested in batches. Lift the special river crab breeding baskets and pour out the river crabs. In addition, select the river crabs that are suitable for overwintering and put them into the overwintering pond.
[0024] The types of feed and feeding methods of the new model of intensive breeding of special river crabs in baskets are basically the same as those of ordinary river crab breeding.
[0025] The theoretical and practical basis of the new model of intensive breeding of special river crabs in baskets is:
[0026] 1. Based on a deep understanding and mastery of river crab habits
[0027] As the crab grows, its body continues to grow, but its hard shell cannot expand accordingly. The crab needs to molt to get rid of the old shell and grow a larger new shell to adapt to the growth of its body. From crab larvae to young crabs, it molts five times; from young crabs to adult crabs, it molts five times, which is one of its important physiological characteristics. However, the molting time of free-range crabs is naturally different due to different individuals. After the crab just molts, the new shell is soft and elastic. The crab begins to absorb a lot of water to fully stretch the new shell to its maximum size. At this time, the crab is weak and does not eat. Although this process is short, it is the most vulnerable time for the crab. It needs a quiet environment and is most difficult to resist the attack of other crabs. Many crabs are eaten during their molting period. In addition, crabs have the habit of fighting each other, and they are often disabled or killed because of fighting for food. Since each special crab breeding basket in this model only stocks one crab or two one-year-old crabs of similar individuals, it can effectively reduce the harm of crabs to each other and greatly improve the survival rate of crabs.
[0028] 2. Based on the need for precise management of river crabs
[0029] Since it is more convenient and focused to understand the growth habits, dietary needs and disease status of river crabs, the new model of intensive breeding of river crabs in special baskets can achieve precise management of river crabs. By strengthening the precise control of water quality, temperature, feed and other factors, it can meet the growth needs of river crabs to the greatest extent and improve breeding efficiency.
[0030] 3. Based on the need to improve the quality of river crabs
[0031] In a pond culture environment, river crabs can fully absorb nutrients from feed, maintain relatively good water quality, grow healthily, and the quality of river crabs is basically good. However, river crabs are currently cultured in rice fields. Because the living space of river crabs is very small and the competition is fierce, it is a method of planting a lot but yielding little. River crabs often dig holes in rice fields to survive, so the quality is difficult to guarantee. If a safe and comfortable cage culture environment is provided for river crabs, river crabs with good appearance can also be cultured in rice fields.
[0032] 4. Based on the need for standardized, refined and large-scale breeding of river crabs
[0033] The main strategy to be considered in carrying out standardized, refined and large-scale breeding of river crabs is water quality management. Water quality is one of the key factors in river crab breeding. In the special river crab breeding basket-style single breeding model, farmers should regularly test the water quality to ensure that the water quality meets the growth requirements of river crabs. Water quality monitoring equipment can be installed to grasp the changes in water quality in real time. At the same time, reasonable water exchange, oxygenation and purification measures should be adopted to keep the water clean and stable. The second is scientific feeding. According to the growth stage and nutritional needs of river crabs, a scientific feeding plan should be formulated. Select high-quality feed, such as compound feed, natural bait, etc., and reasonably control the feeding amount and feeding time. Avoid excessive feeding to cause feed waste and water pollution, and at the same time ensure that river crabs can get sufficient nutrition. The third is disease prevention and control. Strengthening disease prevention and control is an important part of the special river crab breeding basket-style refined breeding. Disinfect the breeding facilities regularly to keep the breeding environment hygienic. Closely observe the health of river crabs, and take isolation, treatment and other measures in time if abnormalities are found. At the same time, the immunity of river crabs can be enhanced to prevent the occurrence of diseases.
[0034] 5. Economic benefits and prospects
[0035] On the one hand, the single-breeding model improves the survival rate and quality of river crabs, which can significantly increase the breeding income. On the other hand, the refined breeding strategy reduces the breeding cost, improves the utilization rate of resources, and further improves the economic benefits of river crab breeding. As people's demand for high-quality river crabs continues to increase, this new model is expected to be widely used in the river crab breeding industry in the future.
[0036] In short, the new model of intensive breeding of river crabs in baskets has brought new ideas and methods to river crab farming. By innovating breeding facilities, leveraging the advantages of single breeding and implementing refined breeding strategies, efficient and sustainable development of river crab farming can be achieved, bringing rich economic returns to farmers and contributing to the advancement of the aquaculture industry.
[0037] The invention has the advantages of simple facilities, convenient implementation, high survival rate of river crabs, high cost performance, strong practicality, suitability for large-scale and factory-based breeding, etc. The economic benefits will certainly be considerable and the application prospects will be broad. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Attached Figure 1 Front view of the special river crab breeding basket;
[0039] Attached Figure 2 Top view of the special river crab breeding basket cover.
[0040] Figure numerals: 1. basket body; 2. smooth board wall for holding mud; 3. smooth board wall for preventing escape; 4. water permeable hole; 5. basket cover; 6. feed feeding port. DETAILED DESCRIPTION
[0041] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the examples, describing exemplary embodiments according to the present application. However, these exemplary embodiments can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art, and in the accompanying drawings, for clarity, the thickness of the layers and regions is expanded, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.
[0042] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the art to which the present application belongs. For ease of description, spatial relative terms such as "above...", "below...", "housing", etc. may be used here to describe the spatial positional relationship between a device or feature as shown in the figure and other devices or features.
[0043] See also Figure 1 , Figure 2 It can be seen that the special river crab breeding basket described in a new model of special river crab breeding basket-type intensive breeding is mainly composed of a basket body 1 and a basket cover 5. The basket body 1 is a one-way open conical cylindrical shell with a thick upper part and a thin lower part. The outer edge of the thick upper opening is curled outwardly toward the basket body into a semicircle, and the thin lower basket bottom is a circular flat plate. A certain height of a mud-containing light board wall 2 is arranged around the shell wall adjacent to the basket bottom, and a certain height of a light-proof light-escape board wall 3 is also arranged around the shell wall near the opening. Circular or rectangular water-permeable holes 4 are evenly distributed in the middle section of the shell wall; the basket cover 5 is disc-shaped, and its diameter matches the diameter of the thick opening on the basket body. Its outer edge is curled toward the center direction into a semicircle that can fit and clamp with the semicircular upper mouth of the basket body, and a number of openings of the same length are evenly opened radially from the center point of the basket cover to the periphery, so that it presents a funnel-shaped barbed feed feeding port 6 facing the same direction as the curling of the outer edge.
[0044] Embodiment 1:
[0045] 1. Site selection and repair of river crab ponds: First, select and repair the surrounding environment and water quality, water depth, drainage and irrigation system and other breeding factors suitable for river crab breeding, and repair the boundaries and pond bottom of the special river crab breeding basket setting area to ensure that the special river crab breeding baskets are neatly placed and the depth is consistent, so as to facilitate the feeding, disease prevention and other breeding work; at the same time, anchor the iron pillars at the edge of the pond to set up several trips of iron wires horizontally and parallelly tightened, through the special river crab breeding basket opening outer edge curled outward into a semicircular part, the special river crab breeding basket is suspended and fixed between the parallel iron wires, so as to suspend the special river crab breeding basket above the water surface at a certain height, and at the same time ensure the stable positioning of the special river crab breeding basket, so as not to be blown away or messed up by wind and waves, in addition, it is necessary to put some soil at the bottom of the special river crab breeding basket, and put part of the special river crab breeding basket in the water, which not only has the function of stabilizing the special river crab breeding basket by the weight of the soil, but more importantly, it is conducive to the river crabs to dig nests, sharpen claws and shed shells, and eat soil to supplement calcium;
[0046] 2. Customization of special river crab breeding baskets: Customization of special river crab breeding baskets suitable for river crab breeding;
[0047] 3. Release of crab seedlings: according to the relevant suitable pond conditions and the season and weather conditions, place part of the special river crab breeding basket in the water and release a one-year-old crab seedling into the special river crab breeding basket;
[0048] 4. River crab breeding: The breeding process of the new model of intensive breeding in special river crab breeding baskets basically follows the technical requirements of ordinary river crab breeding. According to the habit of river crabs to eat at night, the mixed feed is basically fed to the feeding port on the special river crab breeding baskets from 2 to 5 pm;
[0049] 5. Disease prevention and treatment of river crabs: In view of the high density of river crabs in the new model of intensive breeding in special river crab baskets, special disease prevention measures should be formulated and implemented in a timely manner, and observation should be strengthened. If sick crabs are found, they should be treated in time.
[0050] 6. Harvesting river crabs: In autumn, when river crabs are harvested, just lift the special river crab breeding basket and pour out the river crabs.
[0051] Acceptance of the embodiment: In the test in which only one one-year-old river crab was placed in each special river crab breeding basket, the survival rate reached more than 97% because there was no harm between the river crabs, thus greatly improving the breeding efficiency of river crabs.
[0052] Embodiment 2:
[0053] 1. Site selection and repair of river crab ponds: First, select and repair the surrounding environment and water quality, water depth, drainage and irrigation system and other breeding factors suitable for river crab breeding, and repair the boundaries and pond bottom of the special river crab breeding basket setting area to ensure that the special river crab breeding baskets are neatly placed and the depth is consistent, so as to facilitate the feeding, disease prevention and other breeding work; at the same time, anchor the iron pillars at the edge of the pond to set up several trips of iron wires horizontally and parallelly tightened, through the special river crab breeding basket opening outer edge curled outward into a semicircular part, the special river crab breeding basket is suspended and fixed between the parallel iron wires, so as to suspend the special river crab breeding basket above the water surface at a certain height, and at the same time ensure the stable positioning of the special river crab breeding basket, so as not to be blown away or messed up by wind and waves, in addition, it is necessary to put some soil at the bottom of the special river crab breeding basket, and put part of the special river crab breeding basket in the water, which not only has the function of stabilizing the special river crab breeding basket by the weight of the soil, but more importantly, it is conducive to the river crabs to dig nests, sharpen claws and shed shells, and eat soil to supplement calcium;
[0054] 2. Customization of special river crab breeding baskets: Customization of special river crab breeding baskets suitable for breeding two river crabs;
[0055] 3. Release of crab seedlings: according to the relevant suitable pond conditions and the season and weather conditions, place part of the special river crab breeding basket in the water, and release two one-year-old crab seedlings of similar size into the special river crab breeding basket;
[0056] 4. River crab breeding: The breeding process of the new model of intensive breeding in special river crab breeding baskets basically follows the technical requirements of ordinary river crab breeding. According to the habit of river crabs to eat at night, the mixed feed for two river crabs is basically fed to the feeding port on the special river crab breeding basket from 2 to 5 pm;
[0057] 5. Disease prevention and treatment of river crabs: In view of the high density of river crabs in the new model of intensive breeding in special river crab baskets, special disease prevention measures should be formulated and implemented in a timely manner, and observation should be strengthened. If sick crabs are found, they should be treated in time.
[0058] 6. Harvesting river crabs: In autumn, when river crabs are harvested, just lift the special river crab breeding basket and pour out the river crabs.
[0059] Acceptance of the embodiment: In mid-April in spring, among the 100 special river crab breeding baskets where two crabs of the same age were stocked, during the autumn acceptance, 96 special river crab breeding baskets were found to have two crabs alive, of which 6 crabs were disabled, and only 4 were dead and mutilated, with a survival rate of 98%. We consider that stocking two crabs of the same age in the experiment is relatively successful, which is undoubtedly beneficial to improving the utilization rate and economic benefits of the special river crab breeding baskets.
[0060] Embodiment 3:
[0061] 1. Site selection and repair of river crab ponds: First, select and repair the surrounding environment and water quality, water depth, drainage and irrigation system and other breeding factors suitable for river crab breeding, and repair the boundaries and pond bottom of the special river crab breeding basket setting area to ensure that the special river crab breeding baskets are neatly placed and the depth is consistent, so as to facilitate the feeding, disease prevention and other breeding work; at the same time, anchor the iron pillars at the edge of the pond to set up several trips of iron wires horizontally and parallelly tightened, through the special river crab breeding basket opening outer edge curled outward into a semicircular part, the special river crab breeding basket is suspended and fixed between the parallel iron wires, so as to suspend the special river crab breeding basket above the water surface at a certain height, and at the same time ensure the stable positioning of the special river crab breeding basket, so as not to be blown away or messed up by wind and waves, in addition, it is necessary to put some soil at the bottom of the special river crab breeding basket, and put part of the special river crab breeding basket in the water, which not only has the function of stabilizing the special river crab breeding basket by the weight of the soil, but more importantly, it is conducive to the river crabs to dig nests, sharpen claws and shed shells, and eat soil to supplement calcium;
[0062] 2. Customization of special river crab breeding baskets: Customization of special river crab breeding baskets suitable for river crab breeding;
[0063] 3. Release of crab seedlings: according to the relevant suitable pond conditions and the season and weather conditions, place part of the special river crab breeding basket in the water and release a two-year-old crab seedling into the special river crab breeding basket;
[0064] 4. River crab breeding: The breeding process of the new model of intensive breeding in special river crab breeding baskets basically follows the technical requirements of ordinary river crab breeding. According to the habit of river crabs to eat at night, the mixed feed is basically fed to the feeding port on the special river crab breeding baskets from 2 to 5 pm;
[0065] 5. Disease prevention and treatment of river crabs: In view of the high density of river crabs in the new model of intensive breeding in special river crab baskets, special disease prevention measures should be formulated and implemented in a timely manner, and observation should be strengthened. If sick crabs are found, they should be treated in time.
[0066] 6. Harvesting river crabs: In autumn, when river crabs are harvested, just lift the special river crab breeding basket and pour out the river crabs.
[0067] Acceptance of the embodiment: In the experiment where only one two-year-old river crab was released in each special river crab breeding basket, since there was no harm between the river crabs, but because the paper basket used in this experiment was relatively small and the state of the opening of the plastic cloth feeding port was not very good, the escape rate was about 3% (no river crab remains were observed). The survival rate was 96%, thus greatly improving the breeding efficiency of river crabs. And after actual consumption verification, the river crabs raised in baskets had no obvious difference in individual size and fatness from those raised naturally, proving that raising river crabs in baskets is successful and feasible.
[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A new model of intensive culture of river crabs in baskets, characterized by: Use a special river crab breeding basket, put some soil at the bottom, place the lower part of the special river crab breeding basket in water in a pond, rice field or water trough, and breed a single or two similar river crabs in a basket.
2. The special river crab breeding basket described in the new model of river crab cage intensive breeding according to claim 1 is mainly composed of a basket body and a basket cover, and is characterized in that: The basket body is a one-way opening conical cylindrical shell that is thick at the top and thin at the bottom. The outer edge of the thick opening on the top is curled outward into a semicircle toward the basket body, and the thin basket bottom is a circular flat plate. A section of mud-collecting light board wall of a certain height is arranged around the shell wall adjacent to the basket bottom, and a section of light-preventing light-escaping board wall of a certain height is also arranged around the shell wall near the opening, and circular or rectangular water-permeable holes are evenly distributed in the middle section of the shell wall; the basket cover is disc-shaped, and its diameter matches the diameter of the thick opening on the basket body. Its outer edge is curled toward the center to form a semicircle that can fit and clamp with the semicircular upper opening of the basket body, and a number of openings of the same length are evenly opened in a radial shape from the center point of the basket cover to the periphery, so that it presents a funnel-shaped barbed feed feeding port facing the same direction as the curling of the outer edge.