LU103092B1

LU103092B1 - Lantern-shaped foldable sepia esculenta spawning reef

Info

Publication number: LU103092B1
Application number: LU103092A
Authority: LU
Inventors: Chaojie Yang
Original assignee: Univ Hainan Tropical Ocean
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-09-26

Abstract

Provided is a lantern-shaped foldable Sepia esculenta spawning reef. The spawning reef includes a cable and a plurality of lantern-shaped spawning reef units, where two ends of the cable are provided with floating balls, and each lantern-shaped spawning reef unit includes a lantern-shaped frame and a net covering the lantern-shaped frame; the lantern-shaped frame is composed of four semi-circular tube frames and fixing cable ties, and each semi-circular tube frame is composed of a fixing middle shaft and a semi-circular tube,; the semi-circular tube frames are fixed together; and the fixing middle shaft is provided with a small hole, and a rope passes through the small hole to perpendicularly tie the lantern-shaped spawning reef to the cable. The spawning reef is in a lantern shape, and has low flow resistance, a high space utilization rate, a smooth structure, a large hatching area, and convenient disassembly and assembly.

Description

LANTERN-SHAPED FOLDABLE SEPIA ESCULENTA SPAWNING REEF LU103092

TECHNICAL FIELD

[01] The present invention relates to the technical field of artificial fish reefs, in particular to a lantern-shaped foldable Sepia esculenta spawning reef.

BACKGROUND ART

[02] Sepia esculenta, also known as cuttlefish and mullet, belongs to Cephalopoda,

Sepioidea and sepiidae, and is a eurythermic migratory species. Sepia esculenta likes to spawn near islands with water depth of 5-10 m, high salinity, clear water and slow flow, hard bottom material and dense algae and many reefs. When spawning, Sepia esculenta has sand spraying and burrowing habits, and parents die one after another after reproduction. Sepia esculenta is widely distributed in the Far East China Sea of Russia,

Honshu, Shikoku and Kyushu of Japan, the west coast and south coast of North Korea and the Philippine Islands. In China, Sepia esculenta is mainly distributed in

Lanshantou, Rizhao, Shandong, Qingdao and the central and northern parts of the

Huanghai Sea. Sepia esculenta has a short life cycle, rapid generation renewal and rapid growth, is an excellent species with high economic value and was once one of the four major marine fisheries in China.

[03] Since the 1980s, the Sepia esculenta has been faced with the double pressures of overfishing and habitat destruction, and the environment and production order of its spawning grounds and proliferation reserves have also been threatened, and its resource regeneration ability has decreased significantly. The sea areas around Shandong

Province are important spawning grounds for Sepia esculenta, which was included in the local resource proliferation plan of Shandong Province in 1992. At present, there are two ways for Sepia esculenta to proliferate. One way is to use traditional spawning base

Tamarix chinensis or Artemisia annua, which is cheap but cannot be reused, and the number of Tamarix chinensis and Artemisia annua is obviously reduced due to continuous logging, causing great damage to terrestrial vegetation, the other is a semi-artificial proliferation and protection way, that is, the squid cages attached with fertilized eggs of Sepia esculenta are collected and intensively put into a certain sea area to hatch naturally for proliferation and protection management. The semi-artificial proliferation and protection is used to perform the proliferation and release of Sepia esculenta in coastal area, Rizhao, Shandong Province, and good economic benefits are obtained.

[04] Although the effect of using squid cages as spawning bases is still good, the squid cages themselves aim at fishing, are likely to damage the spawning parents and do not adapt to the habit of multiple spawning of Sepia esculenta, which affects the spawning amount of Sepia esculenta. Moreover, the manufacture of squid cages is complicated, and the cost is high, which are not suitable for large-scale proliferation of

Sepia esculenta.

[05] Patent with patent number of CN 104054612 A discloses a cross-shaped foldable Sepia esculenta spawning reef, which is easy to assemble and disassemble.

However, defects thereof are that the angle of an attachment space for fish spawning is 1 single, which is limited to perpendicular attachment for spawning, and the degree of LU103092 assembly and disassembly is low, and a space utilization rate is not high.

SUMMARY

[06] In view of this, the objective of the present invention is to provide a lantern-shaped foldable Sepia esculenta spawning reef. The spawning reef provided by the present invention is easier to assemble and disassemble, which is conductive to transportation and storage, low in manufacturing cost, durable, smooth in structure, low in flow resistance, and not likely to be damaged, may provide spawning attachment bases with different spatial angles, and is large in hatching area, and suitable for nearshore shallow waters with less wind and waves.

[07] In order to achieve the above objective, the present invention provides the following technical solution:

[08] The lantern-shaped foldable Sepia esculenta spawning reef includes a cable (1) and a plurality of lantern-shaped spawning reef units (2) suspended on the cable, two ends of the cable (1) are provided with floating balls (3);

[09] each lantern-shaped spawning reef unit (2) includes a lantern-shaped frame (4) and a net (8) covering the lantern-shaped frame (4);

[10] the lantern-shaped frame (4) is composed of four semi-circular tube frames (5) and fixing cable ties (6);

[11] the semi-circular tube frame (5) is composed of a fixing middle shaft (5-1) and a semi-circular tube (5-2), the fixing middle shaft (5-1) is a quarter cylinder, and two ends of the semi-circular tube (5-2) are fixed at two ends of the fixing middle shaft (5-1);

[12] the four semi-circular tube frames (5) are fixed together by the fixing cable ties (6) to form the lantern-shaped frame (4); and

[13] an upper end of the fixing middle shaft (5-1) is provided with a small hole (7), and a rope passes through the small hole (7) to perpendicularly tie the lantern-shaped spawning reef to the cable.

[14] Preferably, the net (8) is made of polyethylen.

[15] Preferably, the semi-circular tube frames (5) are made of high-density polyethylene.

[16] Preferably, the fixing cable ties (6) are made of nylon.

[17] Preferably, the spawning reef further includes two cement blocks (9), and the cement blocks (9) are tied at two ends of the cable (1) by means of the rope.

[18] The lantern-shaped foldable Sepia esculenta spawning reef includes the cable and the plurality of lantern-shaped spawning reef units suspended on the cable, and according to the present invention, each spawning reef unit is composed of the lantern-shaped frame and the net covering the lantern-shaped frame. The spawning reef provided by the present invention is in a lantern shape, and has low flow resistance, is suitable for nearshore shallow waters with less wind and waves, has a high space utilization rate, and a large hatching area; a lantern-shaped structure is smooth, which causes no damage to spawning parents, and conforms to a habit of multiple spawning of

Sepia esculenta, thus ensuring quality of Sepia esculenta spawning; when the 2 lantern-shaped spawning reef of the present invention is used, the four semi-circular LU103092 tube frames may be assembled into a lantern shape at any time, which is very convenient to disassemble and assemble and is conductive to transportation and storage; the spawning reef provided by the present invention is formed by assembling the plurality of parts, and even if one part is damaged, availability of the whole spawning reef is not damaged, and further, the lantern-shaped frames of the spawning reef provided by the invention are made of the high-density polyethylene, which has good heat resistance, cold resistance, rigidity and toughness, stable chemical properties and good mechanical strength, and the net is made of the polyethylene, which has excellent low-temperature resistance and acid-base corrosion resistance.

BRIEF DESCRIPTION OF THE DRAWINGS

[19] FIG. 1 is a schematic structural diagram of a lantern-shaped foldable Sepia esculenta spawning reef provided by the present invention;

[20] FIG. 2 is a schematic structural diagram of lantern-shaped spawning reef units;

[21] FIG. 3 is a schematic structural diagram of fixing cable ties; and

[22] In figures: 1. cable, 2. lantern-shaped spawning reef unit, 3. floating ball, 4. lantern-shaped frame, 5. semi-circular tube frame, 5-1. fixing middle shaft, 5-2. semi-circular tube, 6. fixing cable tie, 7. small hole, 8. net, 9, cement block.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[23] The present invention provides a lantern-shaped foldable Sepia esculenta spawning reef, a structure is shown in FIG. 1, the lantern-shaped foldable Sepia esculenta spawning reef includes a cable 1 and a plurality of lantern-shaped spawning reef units 2 suspended on the cable, two ends of the cable 1 are provided with floating balls 3.

[24] Number of the lantern-shaped spawning reef units is not particularly limited in the present invention, and different numbers of lantern-shaped spawning reef units may be suspended according to actual needs. In the present invention, the spawning reef units are preferably evenly distributed on the cable.

[25] The present invention has no special requirements for the floating balls, and the floating balls which are well known to those skilled in the art may be used, and the floating balls may provide buoyancy to suspend the spawning reef units in water.

[26] In the present invention, each lantern-shaped spawning reef unit 2 includes a lantern-shaped frame 4 and a net 8 covering the lantern-shaped frame 4. In the present invention, the lantern-shaped frame 4 is composed of four semi-circular tube frames 5 and fixing cable ties 6, as shown in FIG. 2; and the semi-circular tube frame 5 is composed of a fixing middle shaft 5-1 and a semi-circular tube 5-2, the fixing middle shaft 5-1 is a quarter cylinder, and two ends of the semi-circular tube 5-2 are fixed at two ends of the fixing middle shaft 5-1; In the present invention, the semi-circular tube frames 5 are preferably made of high-density polyethylene, each semi-circular tube frame 5 preferably has a radius of 50 cm, the radius of the semi-circular tube frame 5 determines an area of the covering net (equivalent to a hatching area), in the specific 3 examples of the present invention, the radius of the semi-circular tube frame 5 may be LU103092 determined according to actual needs.

[27] In the present invention, the four semi-circular tube frames 5 are fixed together by the fixing cable ties 6 to form the lantern-shaped frame 4; and preferably, the three fixing cable ties are evenly distributed from top to bottom so as to ensure that the four semi-circular tube frames are firmly fixed. In the present invention, the fixing cable ties are preferably circular cable ties with inserting connectors, a specific structure is shown in FIG. 3, and the fixing cable ties are made of nylon.

[28] In the present invention, an upper end of the fixing middle shaft 5-1 is provided with a small hole 7, and a rope passes through the small hole 7 to perpendicularly tie the lantern-shaped spawning reef to the cable. The present invention has no special requirements for a material of the rope, and a hemp rope may be used.

[29] In the present invention, the net 8 is preferably made of polyethylene; and the net 8 is used as an attachment base for squid eggs, and the net made of the polyethylene is used in the present invention, and has excellent low-temperature resistance and acid-base corrosion resistance. According to the present invention, the spawning reef units are of hollow structures, and the surface-covered net is circular as the spawning base, thus providing attachment spaces at different angles; and further, an internal grid structure surrounded by fishing reefs has a good function of protecting the young Sepia esculenta, and the special lantern-shaped structure may improve the hatching area of a single spawning reef unit and the young protection function to the maximum extent.

[30] In the present invention, the spawning reef further includes two cement blocks 9, the cement blocks 9 are tied at two ends of the cable 1 by means of the rope, the cement blocks are used for fixing the spawning reef and regulating a water level. In the specific examples of the present invention, weight of the cement blocks may be adjusted according to an actual situation.

[31] The lantern-shaped foldable Sepia esculenta spawning reef provided by the present invention is easier to assemble and disassemble, which is conductive to transportation and storage, the four semi-circular tube frames 5 are fixed together by the three fixing cable ties 6 to form the lantern-shaped frame 4, then the net 8 covers a surface of the lantern-shaped frame 4 to form the lantern-shaped spawning reef units 2; and then the hemp rope passes through the small hole 7 at the upper end of the fixing middle shaft to perpendicularly tie the lantern-shaped spawning reef units 2 to the cable 1. The assembled spawning reef is put into a spawning sea area for Sepia esculenta, the floating balls 3 and the cement blocks 9 are tied to the two ends of the cable 1, and then spawning may be started; and after a spawning period of the Sepia esculenta is finished, the assembled spawning reef may be disassembled at any time and stored conveniently.

[32] The lantern-shaped foldable Sepia esculenta spawning reef provided by the present invention will be described in detail below with reference to examples, but they cannot be understood as limiting the scope of protection of the present invention.

[33] Example 1

[34] Four semi-circular tube frames 5 covered with a net are fixed together by three fixing cable ties 6 to form lantern-shaped spawning reef units 2; then a hemp rope passes through a small hole 7 at an upper end of a fixing middle shaft to perpendicularly 4 tie the lantern-shaped spawning reef units to a cable 1; and each semi-circular tube LU103092 frame 5 has a radius of 50 cm, a total of 8 lantern-shaped spawning reef units are provided, and a hatching area of single lantern-shaped spawning reef is 3.14 m°.

[35] In the spawning season in late May, Sepia esculenta is put into shallow coastal waters in Rizhao, Shandong Province, and two ends of the cable are tied with floating balls and cement blocks; further, traditional Tamarix chinensis and Artemisia annua spawning reefs (both commercially available) and a cross-shaped spawning reef (prepared and assembled according to patent with patent number of CN 104054612 A) are put in for comparison; and a egg attachment rate of the spawning reefs is calculated, and egg attachment rate = egg attachment area/total hatching area.

[36] Results show that the egg attachment rate of the Tamarix chinensis spawning reef is 74%, the egg attachment rate of the Artemisia annua spawning reef is 71.2%, the egg attachment rate of the cross-shaped spawning reef reaches 87.2%, and the egg attachment rate of the lantern-shaped spawning reef reaches 88.1%; and compared with squid cages, the spawning reef of the present invention has no damage to parent bodies of the Sepia esculenta.

[37] It may be seen from the above examples that the lantern-shaped foldable Sepia esculenta spawning reef provided by the present invention is convenient to assemble and disassemble, which is conductive to transportation and storage; and moreover, flow resistance is small, the hatching area is large, and the lantern structure is smooth in appearance, which does not cause any damage to the spawning parents, conforms to a habit of multiple spawning of the Sepia esculenta, and ensures quality of spawning of the Sepia esculenta.

[38] What is mentioned above is merely preferred embodiments of the present invention, it should be noted that those of ordinary skill in the art can also make several improvements and embellishments without departing from the principles of the present invention, and all the improvements and embellishments will also fall within the scope of protection of the present invention.

Claims

WHAT IS CLAIMED IS: LU103092

1. A lantern-shaped foldable Sepia esculenta spawning reef, comprising a cable (1) and a plurality of lantern-shaped spawning reef units (2) suspended on the cable, two ends of the cable (1) are provided with floating balls (3); each lantern-shaped spawning reef unit (2) comprises a lantern-shaped frame (4) and a net (8) covering the lantern-shaped frame (4); the lantern-shaped frame (4) is composed of four semi-circular tube frames (5) and fixing cable ties (6), wherein each semi-circular tube frame (5) has a radius of 50 cm; the semi-circular tube frame (5) is composed of a fixing middle shaft (5-1) and a semi-circular tube (5-2), the fixing middle shaft (5-1) is a quarter cylinder, and two ends of the semi-circular tube (5-2) are fixed at two ends of the fixing middle shaft (5-1); the net (8) covers an outer side of the semicircular tube (5-2); the four semi-circular tube frames (5) are fixed together by the fixing cable ties (6) to form the lantern-shaped frame (4); the three fixing cable ties (6) are evenly distributed from top to bottom, and the fixing cable ties (6) are circular cable ties with inserting connectors; and an upper end of the fixing middle shaft (5-1) is provided with a small hole (7), and a rope passes through the small hole (7) to perpendicularly tie the lantern-shaped spawning reef to the cable.

2. The lantern-shaped foldable Sepia esculenta spawning reef according to claim 1, wherein the net (8) is made of polyethylene.

3. The lantern-shaped foldable Sepia esculenta spawning reef according to claim 1, wherein the semi-circular tube frames (5) are made of high-density polyethylene.

4. The lantern-shaped foldable Sepia esculenta spawning reef according to claim 1, wherein the fixing cable ties (6) are made of nylon.

5. The lantern-shaped foldable Sepia esculenta spawning reef according to claim 1, wherein the spawning reef further comprises two cement blocks (9), and the cement blocks (9) are tied at two ends of the cable (1) by means of the rope. 1