CN112931430B - Fishing facility and fishing method for macrobrachium rosenbergii in crab and shrimp double main culture mode - Google Patents
Fishing facility and fishing method for macrobrachium rosenbergii in crab and shrimp double main culture mode Download PDFInfo
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- CN112931430B CN112931430B CN202110418556.2A CN202110418556A CN112931430B CN 112931430 B CN112931430 B CN 112931430B CN 202110418556 A CN202110418556 A CN 202110418556A CN 112931430 B CN112931430 B CN 112931430B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K69/00—Stationary catching devices
- A01K69/02—Fixed nets without traps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The invention discloses a fishing facility and a fishing method for macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, wherein the double main culture mode of crabs and shrimps is carried out in a culture pond, the culture pond is provided with a pond ridge a, and the fishing facility comprises: one end of the wall net is connected with the pool ridge a; a wing net assembly; two sets of flush assemblies; a ground cage net assembly; the rear net cage is connected with the other end of the ground cage net assembly. The water flow generated by flushing the submersible pump attracts the macrobrachium rosenbergii with water ejection and swimming habit by the net wall into a catching facility, and the macrobrachium rosenbergii enters a rear net cage through a wing net and a ground cage which are arranged to confuse the macrobrachium rosenbergii, so that the purpose of effectively capturing a large amount of macrobrachium rosenbergii is realized; the river crabs can climb out of the net cage again in the opened net cage, so that the river crabs are prevented from being caught, and the risk of injury is reduced.
Description
Technical Field
The invention belongs to the technical field of crab and shrimp culture, and relates to a catching facility, in particular to a catching facility and a catching method for macrobrachium rosenbergii in a crab and shrimp double main culture mode.
Background
In recent years, in order to reduce the market risk of single-cultured river crabs, the excellent water space of a crab pond is fully utilized, the potential of water resources is excavated, the culture benefit is increased, and people begin to intercropping the river crabs and the macrobrachium rosenbergii under the low density of lakes and ponds. For example, chinese patent application No. 201410133162.2 discloses: intercropping 160-240 macrobrachium rosenbergii with 6-8 cm/tail specification in the stocking amount of 600-1000 river crabs per mu in the lake network; the river crab culture pond with the pond size of 800-1500 river crabs per mu is used for intercropping 80-320 river shrimps per mu with the specification of 400-500 river crabs per mu, or the river crabs with the specification of 100-340 river shrimps per mu are doubly cultivated in the river crab pond with the cultivation size of 800 river crabs per mu, and the river crabs and the river shrimps can grow healthily as long as the aquatic weeds are maintained, so that good cultivation economic benefits are obtained.
The macrobrachium rosenbergii is cultivated in a high density mode, and is usually caught in a net-pulling mode due to poor trapping effect of the macrobrachium rosenbergii ground cage. But the river crab culture pond cannot be caught in a net pulling mode because of more water plants. At present, in the prior art, a small amount of ground cages and net fences are adopted to catch the macrobrachium rosenbergii in the early stage (9-10 late month) and a large amount of macrobrachium rosenbergii is caught in the later stage (10 late month to 11 late month) in a mowing net pull mode. However, even if a small amount of the ground cages and net are used for catching the macrobrachium rosenbergii in the early stage, the river crabs and the macrobrachium rosenbergii are put on the ground cages and net together, so that mutual killing phenomenon is caused, and the selling price is influenced. Therefore, although the crab and macrobrachium rosenbergii double main culture mode can enable the river crab and macrobrachium rosenbergii to grow up at the same time, the quality of the aquatic products is good; but the phenomena of large labor intensity, easy occurrence of the crabs with stumps and the like in the fishing process affect the enthusiasm of the vast breeders and have great popularization difficulty.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects of the prior art and provide a device and a method for capturing macrobrachium rosenbergii in a double main culture mode of crabs and shrimps.
In order to achieve the above purpose, the invention adopts the following technical scheme: a fishing facility for macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, wherein the double main culture mode of crabs and shrimps is carried out in a culture pond, and the culture pond is provided with a pond ridge a, and the fishing facility comprises:
one end of the wall net is connected with the pool ridge a;
the wing net assembly comprises two wing net units and a connecting wing net; each wing net unit comprises a first wing net, a second wing net, a third wing net, a fourth wing net and a fifth wing net; defining one end, close to the wall net, of the first wing net, the second wing net, the third wing net, the fourth wing net and the fifth wing net as the inner ends thereof and one end, far away from the wall net, of the fifth wing net as the outer ends thereof, wherein the first wing net is arranged on one side of the wall net, the inner ends of the second wing net are connected with the outer ends of the first wing net, the outer ends of the third wing net are connected with the outer ends of the second wing net, the outer ends of the fourth wing net are connected with the inner ends of the third wing net, the outer ends of the fifth wing net are connected with the outer ends of the fourth wing net, the fifth wing net is positioned on the outer side of the fourth wing net, the connecting wing net is connected with the inner ends of the two fifth wing nets, and the interval between the inner ends of the two first wing nets is larger than the interval between the inner ends of the two fourth wing nets;
the two groups of flushing assemblies comprise a submersible pump arranged on one side of the wall net and positioned between the pool ridge a and the wing net assembly, and a hose, one end of which is connected with the submersible pump and deviates from the pool ridge a, and the hose extends obliquely towards the direction deviating from the wall net;
the ground cage net assembly is connected with the connecting wing net at one end, and a conical inverted-puncture net is arranged in the ground cage net assembly;
the rear net cage is connected with the other end of the ground cage net assembly.
Optimally, the wall net is perpendicular to the pool ridge a, and the length of the wall net is 5-6 m.
Preferably, two of said wing net units are symmetrical about said wall net.
Optimally, the wall net, the first wing net, the second wing net, the third wing net, the fourth wing net, the fifth wing net and the connecting wing net are mutually independent and have net heights of 2-2.5 m and are 0.4-0.8 m higher than the water surface of the culture pond, and the bottom line of the wall net is a gabion or an iron chain with the diameter of 5-10 cm.
Further, the wall net, the wing net assembly and the rear net cage are mutually independent and are arranged in the culture pond by adopting a plurality of bamboo piles, and the mesh of the wall net, the wing net assembly and the rear net cage is more than or equal to 7 meshes.
Further, the length of the first wing net is 0.5-0.7m, the included angle between the first wing net and the pool ridge a is 15-20 degrees, the projection of the inner end of the first wing net on the wall net is 0.4-0.6 m away from the other end of the wall net, and the distance between the outer end of the first wing net and the pool ridge a is smaller than the distance between the inner end of the first wing net and the pool ridge a; or/and, the length of the second wing net is 1.0-1.2 m, the included angle between the second wing net and the pool ridge a is 40-50 degrees, and the distance between the outer end of the second wing net and the pool ridge a is larger than the distance between the inner end of the second wing net and the pool ridge a; or/and the length of the third wing net is 3.0-3.5 m, the included angle between the third wing net and the pool ridge a is 60-75 degrees, and the distance between the outer end of the third wing net and the pool ridge a is smaller than the distance between the inner end of the third wing net and the pool ridge a; or/and the length of the fourth wing net is 2.0-2.5 m, the included angle between the fourth wing net and the pool ridge a is 35-45 degrees, and the interval between the inner ends of the two fourth wing nets is 0.08-0.15 m; or/and the length of the fifth wing net is 2.5-3.0 m, and the included angle between the fifth wing net and the pool ridge a is 75-85 degrees; or/and the length of the connecting wing net is 1.0-1.2 m.
Optimally, one end of the ground cage net assembly is connected with the connecting wing net through a first stainless steel ring and is connected with the rear net cage through a second stainless steel ring, the diameter of the first stainless steel ring is 0.25-0.30 m, the diameter of the second stainless steel ring is 0.20-0.25 m, the diameter of the outer opening of the conical barbed wire is 0.10-0.15 m, and the length of the ground cage net assembly is 0.5-0.7 m.
Optimally, the length of the rear net cage is 1.5-2.5 meters, the width of the rear net cage is 1.0-1.2 meters, and the height of the rear net cage is 1.5-1.8 meters, and no net cover exists; the included angle between the hose and the pool ridge a is 50-100 degrees.
The invention also aims to provide a method for catching macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, which is carried out by adopting the catching facility to catch by adopting flushing water.
According to the fishing facility for the macrobrachium rosenbergii in the double main culture mode of the crabs and the shrimps, wall nets and wing net assemblies with specific structures are arranged in a culture pond to be matched with a flushing assembly, a ground cage net assembly, a rear net box and the like, so that the macrobrachium rosenbergii with the swimming habit of the top water and the net wall is attracted into the fishing facility through water flow generated by flushing of a submersible pump, and the macrobrachium rosenbergii is led into the rear net box through the wing net and the ground cage which are arranged to confuse the crabs and the shrimps, so that the purpose of effectively capturing a large amount of macrobrachium rosenbergii is realized; the river crabs can climb out of the net cage again in the opened net cage, so that the river crabs are prevented from being caught, and the risk of injury is reduced.
The method for catching the macrobrachium rosenbergii in the double main culture mode of the crabs and the shrimps skillfully achieves the purposes of catching the macrobrachium rosenbergii, keeping the macrobrachium rosenbergii in a small size and continuously catching the macrobrachium rosenbergii, avoids the damage to the river crabs, and saves labor and effort; the method has the advantages of protecting water grass in the pond, ensuring the water quality of the pond and the further growth of the river crabs, and achieving the aim of high quality and high yield.
Drawings
FIG. 1 is a schematic structural view of a fishing facility for macrobrachium rosenbergii in a double main culture mode of crabs and shrimps according to the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in connection with.
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiment, which proceeds with reference to the accompanying drawings. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the invention.
Example 1
As shown in figure 1, the fishing facility of the macrobrachium rosenbergii in the double main culture mode is arranged in the culture pond so that the double main culture mode of the macrobrachium rosenbergii is carried out in the culture pond. The culture pond which is usually used is square, and the applicable size range is preferably: the length is 100-150 m, the width is 80-100 m, so that the culture pond is provided with a pond ridge a and a pond ridge b which are perpendicular to each other (the length of the pond ridge a is defined to be equal to or more than the length of the pond ridge b, the length of the culture pond is the length of the pond ridge a, and the width of the culture pond is the length of the pond ridge b); it should be noted that the middle of the pool ridge a (i.e. the middle of the culture pool) is not planted with water grass, and the width of the area where the water grass is not planted is 4-5m. Of course, the shape and size of the tanks may be conventionally employed in accordance with existing farming practices. The fishing facility for the macrobrachium rosenbergii in the crab and shrimp double main culture mode comprises a wall net 1, a wing net assembly 2, a flushing assembly, a ground cage net assembly 5 and a rear net cage 6.
Wherein one end of the wall net 1 is connected with the pool ridge a, and the other end extends into the culture pool, and the length of the wall net is usually 5-6 m and is preferably perpendicular to the pool ridge a.
The wing net assembly 2 comprises two wing net units (the two wing net units are preferably symmetrical with respect to the wall net 1) and connecting the wing nets 2-6. Each wing net unit comprises a first wing net 2-1, a second wing net 2-2, a third wing net 2-3, a fourth wing net 2-4 and a fifth wing net 2-5, and one end of the first wing net 2-1, the second wing net 2-2, the third wing net 2-3, the fourth wing net 2-4 and the fifth wing net 2-5, which is close to the wall net 1, is defined as the inner end thereof (namely, the respective end thereof) and one end of the second wing net 2-5, which is far away from the wall net 1, is defined as the outer end thereof; the first wing net 2-1 is disposed at one side of the wall net 1 such that the interval between the inner end thereof and the wall net 2 is 0.4-0.6 m, then the inner end of the second wing net 2-2 is connected with the outer end of the first wing net 2-1, the outer end of the third wing net 2-3 is connected with the outer ends of the second wing net 2-2, the outer end of the fourth wing net 2-4 is connected with the inner end of the third wing net 2-3 (i.e., the first wing net 2-1, the second wing net 2-2, the third wing net 2-3 and the fourth wing net 2-4 are sequentially extended in a direction away from the pool ridge a), the outer ends of the fifth wing net 2-5 are connected with the outer ends of the fourth wing net 2-4 and the fifth wing net 2-5 are located at the outer side of the fourth wing net 2-4, the connecting wing net 2-6 is connected with the inner ends of the two fifth wing nets 2-5, and the interval between the inner ends of the two first wing nets 2-1 is larger than the interval between the inner ends of the two fourth wing nets 2-4. In the embodiment, the wall net 1, the first wing net 2-1, the second wing net 2-2, the third wing net 2-3, the fourth wing net 2-4, the fifth wing net 2-5 and the connecting wing net 2-6 are mutually independent and have net heights of 2-2.5 m and are 0.4-0.8 m higher than the water surface of the culture pond, and the bottom line 4 of the wall net adopts a gabion or an iron chain with the diameter of 5-10 cm. The length of the first wing net 2-1 is 0.5-0.7m, the included angle between the first wing net and the pool ridge a is 15-20 degrees, the projection of the inner end of the first wing net on the wall net 1 is 0.4-0.6 m away from the other end of the wall net 1, and the distance between the outer end of the first wing net and the pool ridge a is smaller than the distance between the inner end of the first wing net and the pool ridge a; the length of the second wing net 2-2 is 1.0-1.2 m, the included angle between the second wing net and the pool ridge a is 40-50 degrees, and the distance between the outer end of the second wing net and the pool ridge a is larger than that between the inner end of the second wing net and the pool ridge a; the length of the third wing net 2-3 is 3.0-3.5 m, the included angle between the third wing net and the pool ridge a is 60-75 degrees, and the distance between the outer end of the third wing net and the pool ridge a is smaller than that between the inner end of the third wing net and the pool ridge a; the length of the fourth wing net 2-4 is 2.0-2.5 m, the included angle between the fourth wing net and the pool ridge a is 35-45 degrees, and the interval between the inner ends of the two fourth wing nets 2-4 is 0.08-0.15 m (namely, the shrimp outlet door); the length of the fifth wing net 2-5 is 2.5-3.0 m, and the included angle between the fifth wing net and the pool ridge a is 75-85 degrees; the length of the connecting wing net 2-6 is 1.0-1.2 m (the connecting wing net 2-6 is basically parallel to the pool ridge a); such that the second wing net 2-2 and the third wing net 2-3 are protruded outside the first wing net 2-1 and the fourth wing net 2-4.
The flushing assembly has two sets. Each group of flushing assemblies comprises a submersible pump 7 arranged on one side of the wall net 1 and positioned between the pool ridge a and the wing net assembly 2, and a hose 8, one end of which is connected with the submersible pump 7 and is away from the pool ridge a, wherein the hose 8 extends obliquely towards the direction away from the wall net 1, so that the included angle between the hose 8 and the pool ridge a is 50-100 degrees, and the water outlet direction 9 of the hose 8 is in the range shown in fig. 1. A group of flushing assemblies (2 inch specifications of the adopted submerged pump 7) are respectively arranged on two sides of the wall net 1, and flush water is continuously carried out towards the center of the culture pond to form water flow, so that the water flow of the macrobrachium rosenbergii is stimulated to flow towards the wall net 1 and the first wing net 2-1.
One end of the ground cage net assembly 5 is connected with the connecting wing net 2-6, and a conical inverted-puncture net 5-2 is arranged in the ground cage net assembly for placing back-stream of shrimps and crabs; in the embodiment, one end of the ground cage net assembly is connected with the connecting wing net 2-6 through a first stainless steel ring 5-1 and is connected with the rear net cage 6 through a second stainless steel ring 5-3, the diameter of the first stainless steel ring 5-1 is 0.25-0.30 m, the diameter of the second stainless steel ring 5-3 is 0.20-0.25 m (the diameter of the second stainless steel ring 5-3 is smaller than that of the first stainless steel ring 5-1), the diameter of the outer opening of the conical barbed net 5-2 is 0.10-0.15 m, and the length of the ground cage net assembly is 0.5-0.7 m. The rear net cage 7 is connected with the other end of the ground cage net assembly, has the length of 1.5-2.5 meters, the width of 1.0-1.2 meters and the height of 1.5-1.8 meters, and has no net cover, so that river crabs which enter the fishing facility by mistake can climb out of the net cage easily, and the risk of damage to the appendages is reduced.
In the embodiment, the wall net 1, the wing net assembly 2 and the rear net cage are independently arranged in the culture pond (especially the joint of each wing net) by adopting a plurality of bamboo piles 4, the mesh is more than or equal to 7 meshes, and only large-size macrobrachium rosenbergii with the size of more than 25 g/tail is caught.
Example 2
The embodiment provides a method for catching macrobrachium rosenbergii in a crab and shrimp double main culture mode, which adopts catching facilities in the embodiment 1, and specifically comprises the following steps: in the 24 mu pond in the last ten days of 3 months, 80 river crabs per kg are bred (the breeding density is 850 river crabs per mu) according to the prior method (as disclosed in Chinese patent application No. 201410633311.1; the same applies below); then 200 giant freshwater prawns 3000 tails per kg are bred in the last ten days of 7 months, and the breeding is carried out according to the existing method; fishing in the last 10 to last 11 months. 105 kg/mu of river crabs are harvested, the average specification is 175 g/mu, and the recapture rate is 70.6%; the macrobrachium rosenbergii 145 kg/mu, the average specification of 75 g/tail and the recapture rate of 64.4 percent.
Example 3
The present embodiment provides a method for catching macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, which is basically identical to the method in embodiment 2, except that: 16 mu of river crab cultivation purse net in the lake and 800 river crabs with 100 river crabs/kg in the last ten days of 3 months are put into culture; and then culturing 1400 tails of macrobrachium rosenbergii with the specification of 250 tails/kg in the last 7 months. Finally, 95 kg/mu of river crabs are harvested, the average specification is 195 g/mu, and the recapture rate is 60.9%; the macrobrachium rosenbergii has 85 kg/mu, the average specification of 90 g/tail and the recapture rate of 67.5 percent.
Comparative example 1
This example provides a method for harvesting macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, which is basically the same as the method in example 2, except that: the fishing facilities in the example 1 are not used, but the normal grass cutting net pull (9 late month) mode is adopted to catch the macrobrachium rosenbergii, the final result is that the river crab yield is 62 kg/mu, the average specification is 176 g/mu, and the recapture rate is 44.0%; the yield of the macrobrachium rosenbergii is 118 kg/mu, the average specification is 76 g/tail, and the recapture rate is 51.8%.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (9)
1. A facility for catching macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, wherein the double main culture mode of crabs and shrimps is carried out in a culture pond, and the culture pond is provided with at least a pond ridge a, and is characterized by comprising:
the wall net (1), one end of the wall net (1) is connected with the pool ridge a;
a wing net assembly (2), the wing net assembly (2) comprising two wing net units and a connecting wing net (2-6); each wing net unit comprises a first wing net (2-1), a second wing net (2-2), a third wing net (2-3), a fourth wing net (2-4) and a fifth wing net (2-5); defining one end, close to the wall net (1), of the first wing net (2-1), the second wing net (2-2), the third wing net (2-3), the fourth wing net (2-4) and the fifth wing net (2-5) as the inner end and one end far away from the wall net (1) as the outer end, wherein the first wing net (2-1) is arranged on one side of the wall net (1), the inner end of the second wing net (2-2) is connected with the outer end of the first wing net (2-1), the outer end of the third wing net (2-3) is connected with the outer end of the second wing net (2-2), the outer end of the fourth wing net (2-4) is connected with the inner end of the third wing net (2-3), the outer end of the fifth wing net (2-5) is connected with the outer end of the fourth wing net (2-4) and the outer end of the fifth wing net (2-5) is positioned at a distance of the inner end of the fourth wing net (2-4), and the outer ends of the fifth wing net (2-4) are connected with the inner ends of the fourth wing net (2-4) at a distance of the two wings (2-4);
the two groups of flushing assemblies comprise a submersible pump (7) arranged on one side of the wall net (1) and positioned between the pool ridge a and the wing net assembly (2) and a hose (8) with one end connected with the submersible pump (7) and deviating from the pool ridge a, and the hose (8) extends obliquely towards the direction deviating from the wall net (1);
the ground cage net assembly (5), one end of the ground cage net assembly (5) is connected with the connecting wing net (2-6), and a conical inverted-puncture net (5-2) is arranged in the ground cage net assembly;
the rear net cage (6) is connected with the other end of the ground cage net assembly (5).
2. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, wherein: the wall net (1) is perpendicular to the pool ridge a, and the length of the wall net is 5-6 m.
3. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, wherein: the two wing net units are symmetrical with respect to the wall net (1).
4. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, wherein: the wall net (1), the first wing net (2-1), the second wing net (2-2), the third wing net (2-3), the fourth wing net (2-4), the fifth wing net (2-5) and the connecting wing net (2-6) are 2-2.5 m in height, the wall net (1), the first wing net (2-1), the second wing net (2-2), the third wing net (2-3), the fourth wing net (2-4), the fifth wing net (2-5) and the connecting wing net (2-6) are all higher than the water surface of the culture pond by 0.4-0.8 m, and the bottom line (3) of the wall net is a gabion or an iron chain with the diameter of 5-10 cm.
5. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, 3 or 4, wherein: the wall net (1), the wing net component (2) and the rear net cage (6) are mutually independent and are arranged in the culture pond by adopting a plurality of bamboo piles (4), and the mesh of the wall net is more than or equal to 7 meshes.
6. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, 3 or 4, wherein: the length of the first wing net (2-1) is 0.5-0.7m, an included angle between the first wing net and the pool ridge a is 15-20 degrees, the projection of the inner end of the first wing net (2-1) on the wall net (1) is 0.4-0.6 m away from the other end of the wall net (1), and the distance between the outer end of the first wing net and the pool ridge a is smaller than the distance between the inner end of the first wing net and the pool ridge a; or/and the length of the second wing net (2-2) is 1.0-1.2 m, the included angle between the second wing net and the pool ridge a is 40-50 degrees, and the distance between the outer end of the second wing net and the pool ridge a is larger than the distance between the inner end of the second wing net and the pool ridge a; or/and the length of the third wing net (2-3) is 3.0-3.5 m, the included angle between the third wing net and the pool ridge a is 60-75 degrees, and the distance between the outer end of the third wing net and the pool ridge a is smaller than the distance between the inner end of the third wing net and the pool ridge a; or/and, the length of the fourth wing net (2-4) is 2.0-2.5 m, the included angle between the fourth wing net and the pool ridge a is 35-45 degrees, and the interval between the inner ends of the two fourth wing nets (2-4) is 0.08-0.15 m; or/and the length of the fifth wing net (2-5) is 2.5-3.0 m, and the included angle between the fifth wing net and the pool ridge a is 75-85 degrees; or/and the length of the connecting wing net (2-6) is 1.0-1.2 m.
7. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, wherein: one end of the ground cage net assembly (5) is connected with the connecting wing net (2-6) through a first stainless steel ring (5-1) and is connected with the rear-mounted net cage (6) through a second stainless steel ring (5-3), the diameter of the first stainless steel ring (5-1) is 0.25-0.30 m, the diameter of the second stainless steel ring (5-3) is 0.20-0.25 m, the diameter of the outer opening of the conical barbed net (5-2) is 0.10-0.15 m, and the length of the ground cage net assembly is 0.5-0.7 m.
8. The fishing facility for macrobrachium rosenbergii in the crab and shrimp double main culture mode according to claim 1, wherein: the length of the rear net cage (6) is 1.5-2.5 meters, the width is 1.0-1.2 meters, the height is 1.5-1.8 meters, and no net cover exists; the included angle between the hose (8) and the pool ridge a is 50-100 degrees.
9. A method for catching macrobrachium rosenbergii in a double main culture mode of crabs and shrimps, which is characterized in that the method uses the catching device of any one of claims 1 to 8 to catch by flushing and trapping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418556.2A CN112931430B (en) | 2021-04-19 | 2021-04-19 | Fishing facility and fishing method for macrobrachium rosenbergii in crab and shrimp double main culture mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110418556.2A CN112931430B (en) | 2021-04-19 | 2021-04-19 | Fishing facility and fishing method for macrobrachium rosenbergii in crab and shrimp double main culture mode |
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| CN112931430A CN112931430A (en) | 2021-06-11 |
| CN112931430B true CN112931430B (en) | 2023-06-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259809A (en) * | 1992-02-28 | 1993-11-09 | Rainey Jr Don E | Apparatus for harvesting shrimp |
| CN201830773U (en) * | 2010-09-02 | 2011-05-18 | 闫洪晨 | High-efficient shrimp pot |
| CN102511453A (en) * | 2012-01-06 | 2012-06-27 | 苏州大学 | Fishing tool for macrobrachium nipponensis seeds and using method for fishing tool |
| CN104222029A (en) * | 2014-05-04 | 2014-12-24 | 孙东亚 | Rapid crabbing method and device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259809A (en) * | 1992-02-28 | 1993-11-09 | Rainey Jr Don E | Apparatus for harvesting shrimp |
| CN201830773U (en) * | 2010-09-02 | 2011-05-18 | 闫洪晨 | High-efficient shrimp pot |
| CN102511453A (en) * | 2012-01-06 | 2012-06-27 | 苏州大学 | Fishing tool for macrobrachium nipponensis seeds and using method for fishing tool |
| CN104222029A (en) * | 2014-05-04 | 2014-12-24 | 孙东亚 | Rapid crabbing method and device |
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