CN109441928B

CN109441928B - Eta-shaped nail for coral and application thereof

Info

Publication number: CN109441928B
Application number: CN201811264974.5A
Authority: CN
Inventors: 张浴阳; 黄晖; 雷新明; 江雷; 袁翔城; 袁涛; 练健生; 刘胜
Original assignee: South China Sea Institute of Oceanology of CAS
Current assignee: Hainan Shanhai Marine Technology Co ltd
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2020-12-25
Anticipated expiration: 2038-10-26
Also published as: CN109441928A

Abstract

The invention provides an eta-shaped nail for coral and application thereof, belonging to the technical field of coral reef ecological artificial restoration. The eta-shaped nail for the coral comprises a long foot, a short foot and a transition section, wherein the two ends of the transition section are respectively connected with the long foot and the short foot to form an eta shape, and the end of the short foot, far away from the transition section, and the end of the long foot, far away from the transition section, are provided with sharp heads. The eta-shaped nail for the coral has a simple structure and lower cost, is used for reef-building coral bottom sowing transplantation, can effectively and stably transplant the reef-building coral at the bottom of the coral reef or on a reef body, reduces tissue death of the coral caused by rotational friction, greatly reduces coral shedding rate, and obviously improves the survival rate of the coral.

Description

Eta-shaped nail for coral and application thereof

Technical Field

The invention belongs to the technical field of eta-shaped nails for corals, and particularly relates to eta-shaped nails for corals and application thereof.

Background

Since the coral reef ecosystem is rapidly degenerated worldwide, more than half of the coral reefs are currently severely stressed. The main phenomenon shown by the degeneration of the coral reef is the reduction of the quantity of reef-building corals, so that the whole ecological system is lack of basic functional organisms, and the structure and the function of the ecological system are unbalanced. In order to restore the ecological structure of coral reefs, people began to adopt a coral transplantation method for ecological restoration. By transplanting and bottom sowing the reef-building corals into the degraded coral reef, the quantity of the reef-building corals in the coral reef is improved, and the coral reef ecosystem is helped to recover the functions.

The coral transplantation methods adopted at present mainly comprise the following methods, but all of them have corresponding disadvantages. The cutting method is characterized in that coral broken branches are directly inserted into gaps and small holes of a coral reef or placed on the surface of the coral reef, the coral broken branches are not fixed and can be stabilized only by the fact that the coral skeleton grows and spreads to surrounding substrates, and the coral broken branches can roll and move under the influence of sea waves or ocean currents, so that the survival rate is low and the growth speed is slow. The coral broken branches are directly tied to the remaining dendritic coral skeleton on the coral reef by adopting a fish line or a ribbon for stabilization, but because the remaining coral skeleton becomes brittle and breaks under the erosion action of the undercutting organisms and seawater, the coral broken branches tied to the upper door fall off along with the fracture of the skeleton, so that the death rate is increased. Meanwhile, the method requires a large amount of dendritic coral skeleton on the coral reef to be implemented, and the condition is often difficult to meet. The method for adhering the coral skeleton to the coral reef substrate by using the underwater glue is also adopted, but the cost of the currently used underwater glue is too high, so that the method cannot be applied in a large quantity, and only can be applied to small-scale experiments and demonstrations. The method can be used for a large amount of flat bottom materials on the coral reefs, but the iron nails need to be directly driven into the coral reefs by the underwater iron hammer, a diver needs to rotate the iron hammer at the bottom, more physical power and air are consumed, and particularly, the method is operated for a long time, and the probability of suffering from the scuba is greatly increased. Meanwhile, researches find that coral branches are dead due to coral transplantation by adopting the iron nail mode, and the survival rate of coral transplantation is reduced.

The coral transplanting method and the coral transplanting device adopted at present have the problems of obvious limitation and low efficiency, and how to improve the efficiency of the coral transplanting method becomes one of the key technical problems which need to be solved urgently in coral reef repair.

Disclosure of Invention

One of the purposes of the invention is to provide an n-shaped nail for coral, which has simple structure and lower cost, can effectively and stably transplant hermatypic coral on the coral reef bottom or reef body, reduce tissue death of coral caused by rotational friction, greatly reduce coral shedding rate and obviously improve the survival rate of coral.

The invention also aims to provide an application of the eta-shaped nail for the coral, for example, the eta-shaped nail can be used for bottom sowing transplantation of hermatypic coral.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the embodiment of the invention provides an eta-shaped nail for coral, which comprises a long foot, a short foot and a transition section, wherein the two ends of the transition section are respectively connected with the long foot and the short foot to form the eta-shaped nail, and the end of the short foot, which is far away from the transition section, and the end of the long foot, which is far away from the transition section, are provided with pointed parts.

The inventor finds that the reason that the death of coral branches and the low survival rate caused by coral transplantation by adopting the existing iron nail mode can be as follows: although the transplanted coral broken branches are bound on the iron nails and are not easy to fall off, the coral broken branches can rotate around the iron nails under the action of sea waves, and coral tissues around the coral broken branches die due to friction and are not beneficial to the growth of the coral tissues; and because the coral rotates around the iron nail, the bottom is difficult to adhere to and grows on the coral reef bottom, can cause the coral branch breaking to die for a long time, has reduced the survival rate that the coral was transplanted. In view of this, the present invention has been thus made.

In a preferred embodiment of the present invention, the distance between the long leg and the short leg is 0.6-2 cm.

In a preferred embodiment of the invention, the η -shaped nail for coral further comprises a plurality of spurs respectively disposed on the surface of the long leg on the side close to the short leg and/or the surface of the short leg on the side close to the long leg.

In a preferred embodiment of the present invention, a first group of the first protruding thorns is disposed on a surface of the long leg on a side close to the short leg, the first group of the first protruding thorns includes a plurality of first protruding thorns, the plurality of first protruding thorns are disposed at intervals along an axial direction of the long leg, and each first protruding thorns is composed of a plurality of protruding thorns disposed at intervals along a circumferential direction of the long leg.

In a preferred embodiment of the present invention, a second group of protruding thorns is disposed on a surface of the short leg on a side close to the long leg, the second group of protruding thorns includes a plurality of second protruding thorns, the plurality of second protruding thorns are disposed at intervals along an axial direction of the leg, and each second protruding thorns is composed of a plurality of protruding thorns disposed at intervals along a circumferential direction of the leg.

In a preferred embodiment of the present invention, the length of each of the first spinous processes extending from the surface of the long leg to the short leg is 2-5mm, and/or the length of each of the second spinous processes extending from the surface of the short leg to the long leg is 2-5 mm.

In a preferred embodiment of the invention, the coral η -shaped nail further comprises a groove provided on a surface of the long leg on a side away from the short leg and/or a surface of the short leg on a side away from the long leg.

In a preferred embodiment of the present invention, when the groove is disposed on a surface of a side of the long leg away from the short leg, a projection of the groove on a longitudinal section of the long leg is located between projections of two adjacent first stabs on the longitudinal section.

In a preferred embodiment of the present invention, when the groove is disposed on a surface of a side of the short leg away from the long leg, a projection of the groove on a longitudinal section of the short leg is located between projections of two adjacent second stabs on the longitudinal section.

The embodiment of the invention also provides application of the eta-shaped nail for coral, for example, the eta-shaped nail can be used for bottom sowing transplantation of hermatypic coral.

The eta-shaped nail for the coral and the application thereof in the embodiment of the invention have the beneficial effects that:

the eta-shaped nail for coral provided by the embodiment of the invention has a simple structure and lower cost, and can be used for reef-building coral bottom sowing transplantation, so that reef-building corals can be effectively and stably transplanted at the bottom of coral reefs or on reef bodies, tissue death of corals caused by rotational friction is reduced, coral falling rate is greatly reduced, and coral survival rate is obviously improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an η -shaped nail for coral without spikes and grooves according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of an η -shaped nail for coral provided with spurs and grooves according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of colloidal particles provided in the examples of the present application;

FIG. 4 is a schematic diagram of the η -shaped nail for coral used in conjunction with colloidal particles provided in the examples of the present application.

Icon: 100-coral is nailed with eta-shape; 10-long leg; 20-short leg; 30-a transition section; 40-spike portion; 50-protruding thorns; 51-a first group of spurs; 510-a first spur portion; 55-a second group of thorns; 550-a second spur; 60-grooves; 200-colloidal particles.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "vertical" or the like does not require that the components be perfectly vertical, but rather may be slightly inclined. For example, "vertical" merely means that the direction is more vertical than "horizontal", and does not mean that the structure must be perfectly vertical, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following examples are given to illustrate the present invention.

Examples

The eta-shaped nail 100 for coral is mainly used for bottom sowing transplantation of hermatypic coral. Referring to fig. 1 and 2, the η -shaped nail 100 for coral includes a long leg 10, a short leg 20 and a transition section 30, wherein two ends of the transition section 30 are respectively connected to the long leg 10 and the short leg 20 to form an "η" shaped nail, and an end of the short leg 20 away from the transition section 30 and an end of the long leg 10 away from the transition section 30 are both provided with a pointed portion 40. Wherein, the length of the long leg 10 is greater than that of the short leg 20. The long leg 10 and the short leg 20 are preferably parallel to each other; the long leg 10 is flush with one end of the short leg 20, and the two ends of the transition section 30 are smoothly transited with the long leg 10 and the short leg 20 respectively.

The long leg 10, which may also be referred to as a fixing leg in this application, is mainly used to be directly or indirectly fixed in a predetermined hole of the coral reef substrate. The short leg 20, which may also be referred to as an auxiliary leg in this application, is used to strike the coral reef at the end remote from the transition section 30. It is worth to be noted that the 'preset holes' referred to in the application can be small holes with suitable sizes drilled on the coral reef substrate by using an underwater gas drill or an electric drill with a drill bit, or small holes preset on the surface of an artificial reef.

In some embodiments, the long leg 10 is directly fixed in a predetermined hole of the coral reef substrate, in which case, a surface of an end of the long leg 10 remote from the transition section 30 may have a screw thread so as to be spirally inserted into the predetermined hole.

In some embodiments, the long legs 10 are indirectly fixed in the predetermined holes of the coral reef substrate. In this case, this can be achieved by: put into micelle 200 (can refer to fig. 3) in predetermineeing the hole earlier, micelle 200 can be for example the plastics material, and the surface of micelle 200 can be equipped with a plurality of annular bosss along the axial direction parallel of micelle 200 to improve the firm degree of micelle 200 in predetermineeing the hole, avoid droing.

The diameter of the preset hole is slightly larger than the diameter of the plastic expansion colloidal particle 200, and the depth of the preset hole is larger than the length of the colloidal particle 200, so that the eta-shaped nail 100 for the coral can be stably and difficultly pulled out after being inserted into the colloidal particle 200 placed in the preset hole.

The long leg 10 of the η -shaped coral nail 100 is inserted into the colloidal particle 200 (as shown in fig. 4), and the coral is driven into the coral reef until the short leg 20 of the η -shaped coral nail 100 touches the coral reef substrate by using an instrument such as a hammer, and then the hammer is driven again to drive the end of the short leg 20 away from the transition section 30 into the coral reef. By driving the long leg 10 into the colloidal particle 200, the colloidal particle 200 is supported and expanded, thereby stably abutting against the hole wall of the predetermined hole and preventing the colloidal particle 200 from being separated from the predetermined hole. For reference, in this case, the length of the short leg 20 may be the length of the long leg 10 minus the length of the colloidal particle 200.

It is noted that, through the experiments, after the long leg 10 is driven into the colloidal particle 200 or the coral reef, at least 20-30 kg of force is required under the water to possibly detach the long leg 10 from the colloidal particle 200 or the coral reef.

In some embodiments, the length of the long foot 10 can be 8-15cm, such as 8cm, 8.5cm, 9cm, 10cm, 10.5cm, 11cm, 11.5cm, 12cm, 12.5cm, 13cm, 13.5cm, 14cm, 14.5cm, or 15 cm. The longer the length, the thicker the η -shaped nail 100 for coral is, and if it is to maintain sufficient strength in the coral reef, the larger size of the colloidal particles 200 is required or a predetermined hole of a larger size is drilled in the coral reef, which is disadvantageous to the coral reef in maintaining a good ecosystem.

In some embodiments, the distance between the long foot 10 and the short foot 20 may be 0.6-2cm, such as 0.6cm, 0.8cm, 1cm, 1.2cm, 1.4cm, 1.6cm, 1.8cm, or 2 cm. If the distance is too wide, the coral eta-shaped nail 100 is likely to be deformed during the striking process of driving the long and short legs into the coral reef or the colloidal particles 200. When the distance is too narrow, the contact surface of the fixed coral branches and the transplanting nail is easy to narrow, and the fixed coral branches and the transplanting nail are inconvenient to bind and fix on the transplanting nail.

In some embodiments, the cross-section of the long leg 10 and the short leg 20 may be circular, oval, triangular, etc., and the surfaces of the long leg 10 and the short leg 20 are preferably smooth to avoid rubbing during coral transplantation, damaging coral, causing interference with pathogens or attracting natural enemies through the odor emitted from the injured parts thereof.

In the present application, the end of the long leg 10 away from the transition section 30 and the end of the short leg 20 away from the transition section 30 each have a pointed portion 40, and the pointed portions 40 are used for driving into the coral reef or the colloidal particle 200. Alternatively, the tip portion 40 may be conical, for example.

In this application, the long legs of the η -shaped nail 100 for coral are mainly used to stabilize the η -shaped nail 100 for coral and prevent the coral-use η -shaped nail 100 from falling off. The short legs mainly serve to prevent the coral from rotating with the η -shaped nail 100. Through setting up interconnect's long leg and short leg, can play the fixed effect of both feet, avoid the coral rotatory around single nail body.

In the present application, the two ends of the transition section 30 are connected to the long leg 10 and the short leg 20 respectively to form an "η" shaped nail, which is understood to mean that the transition section 30 is in the shape of a circular arc with a smooth surface.

In the present application, the material of the η -shaped nail 100 for coral may be, but is not limited to, stainless steel, aluminum alloy, cast iron, ceramic, glass, or the like.

In some preferred embodiments, the η -shaped coral nail 100 further comprises a plurality of protrusions 50, and the plurality of protrusions 50 are respectively disposed on a surface of the long leg 10 on a side close to the short leg 20 and/or a surface of the short leg 20 on a side close to the long leg 10, and preferably are simultaneously disposed on a surface of the long leg 10 on a side close to the short leg 20 and a surface of the short leg 20 on a side close to the long leg 10. The spinous process 50 is provided at a portion of the long leg 10 or the short leg 20 where the colloidal particles 200 or the coral reef is not driven. It should be noted that the surface of the bur 50 is also smooth, and the end of the bur 50 is smooth, which will not hurt the coral.

In reference, the surface of the long leg 10 on the side close to the short leg 20 (i.e., the inner side surface of the long leg 10) is provided with a first group of thorns 51, the first group of thorns 51 includes a plurality of first thorns 510, and the plurality of first thorns 510 are spaced apart from each other along the axial direction of the long leg 10 to form the first group of thorns 51. Each of the first spinous processes 510 is composed of a plurality of spinous processes 50 spaced apart along the circumference of the long leg 10.

The number of the first spurs 510 may be, but not limited to, 2, 3, 4, 5, 6 or more. Each of the first spinous processes 510 may include 2, 3, 4, 5 or more spinous processes 50.

In some more preferred embodiments, the first protruding parts 510 constituting the first protruding part group 51 are equidistantly spaced, and the plurality of protruding parts 50 constituting the same first protruding part 510 are also equidistantly spaced.

As can be seen, the surface of the short leg 20 on the side close to the long leg 10 (i.e. the inner side surface of the short leg 20) is provided with a second group 55 of protrusions, the second group 55 of protrusions comprises a plurality of second protrusions 550, the plurality of second protrusions 550 are arranged at intervals along the axial direction of the leg, and each second protrusion 550 is composed of a plurality of protrusions 50 arranged at intervals along the circumferential direction of the short leg 20.

Similarly, the number of the second spurs 550 may be, but not limited to, 2, 3, 4, 5, 6 or more. Each of the second spinous processes 550 may include 2, 3, 4, 5 or more spinous processes 50.

In some more preferred embodiments, the second plurality of spikes 550 forming the second group of spikes 55 are equally spaced, and the plurality of spikes 50 forming the same second spike 550 are also equally spaced.

In some embodiments, each of the first spinous processes 510 may have a length of 2 to 5mm, such as 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm, from the surface of the long leg 10 to the short leg 20. The length of each spur 50 in the second spur portion 550, which is extended from the surface of the short leg 20 to the long leg 10, may also be 2-5mm, such as 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5 mm.

The provision of the burs 50 can stabilize the coral and prevent the coral from slipping.

Further, the coral η -shaped nail 100 further comprises a groove 60, and the groove 60 is provided on a surface of the long leg 10 on a side away from the short leg 20 (outer surface of the long leg 10) and/or a surface of the short leg 20 on a side away from the long leg 10 (outer surface of the short leg 20).

When the groove 60 is disposed on the surface of the long leg 10 on the side away from the short leg 20, the projection of the groove 60 on the longitudinal section of the long leg 10 is located between the projections of two adjacent first thorns 510 on the longitudinal section. The number of the grooves 60 provided on the outer surface of the long leg 10 may be 1, or 2 or more. When the number is 2 or more than 2, the first stabs are also arranged along the axial direction of the long foot 10 at intervals and respectively located between the projections of two different adjacent first stabs 510 on the longitudinal section of the long leg. In other words, taking the example that the number of the first protruding burs 510 is 3 and the number of the grooves 60 is 2, the first groove 60 is located between the first protruding bur 510 and the projection of the second first protruding bur 510 on the longitudinal section of the long leg, and the second groove 60 is located between the second first protruding bur 510 and the projection of the third first protruding bur 510 on the longitudinal section of the long leg.

When the groove 60 is disposed on the surface of the short leg 20 on the side far from the long leg 10, the projection of the groove 60 on the longitudinal section of the short leg 20 is located between the projections of the two adjacent second stabs 550 on the longitudinal section. The number of the grooves 60 provided on the outer surface of the short leg 20 may be 1, or 2 or more. When the number is 2 or more than 2, the second stabs are also arranged at intervals along the axial direction of the short leg 20 and are respectively positioned between the projections of two different adjacent second stabs 550 on the longitudinal section of the short leg. In other words, taking the example that the number of the second stabs 550 is 3 and the number of the grooves 60 is 2, the first groove 60 is located between the first second stabs 550 and the projection of the second stabs 550 on the longitudinal section of the short leg, and the second groove 60 is located between the projection of the second stabs 550 and the projection of the third second stabs 550 on the longitudinal section of the short leg.

Through setting up above-mentioned recess 60, can be used for the fixed ribbon of binding the coral, prevent that the ribbon from sliding and causing the coral removal or the pine to take off.

In the transplanting process, the long axis of the coral to be transplanted and the coral reef bottom are vertically placed between the long leg 10 and the short leg 20 of the eta-shaped nail 100 for the coral, so that the coral is close to the spurs 50 on the eta-shaped nail 100 for the coral as much as possible. Then the coral is bound on the eta-shaped nail 100 for the coral by a plastic binding tape, and the coral is tightly tied by force after the binding tape is adjusted to be sunk into the groove 60 at the outer side of the eta-shaped nail 100 for the coral, so as to ensure that the coral cannot fall off.

Bearing, utilizing the thorn 50 of the inboard eta shape nail 100 for the coral and being used for the recess 60 cooperation of fixed ribbon with the eta shape nail 100 outside for the coral, can fully avoid the coral to reciprocate, simultaneously because have a plurality of contact points between the eta shape nail 100 for the coral and the coral, the coral tissue can be faster to the coral with the eta shape nail 100 and climb and attach the growth for the increase of coral surface area, more be favorable to the coral to grow.

Test examples

Setting a test group 1, a test group 2 and a control group, wherein the test group 1 and the test group 2 both adopt the eta-shaped nail for coral provided by the embodiment of the application,

the eta-shaped nail for coral adopted by the test group 1 specifically comprises the following characteristics: the long foot length is 10cm, and the interval between long foot and the short foot is 1cm, and the internal surface of long foot is equipped with 5 first spurs portion that set up along the axial equidistance interval of long foot, and every first spur portion is by the spur that 4 circumference equidistance intervals set up along long foot, and the surface of long foot is provided with 1 recess, and this recess corresponds to the position between second first spur portion and the third first spur portion (the order of spurs portion is ordered in proper order by the one end of being close to the changeover portion of long foot to the one end of keeping away from the changeover portion). The internal surface of short foot is equipped with 5 along the axial equidistance interval second spurs portion that sets up of short foot, and every second spurs portion is by 4 along the spurs that the circumference equidistance interval of short foot set up, and the surface of short foot is provided with 1 recess, and this recess corresponds to the position between second spurs portion and the third second spurs portion (the order of spurs portion is ordered in proper order by the one end that is close to the changeover portion to the one end of keeping away from the changeover portion of short foot).

The difference between the eta-shaped nail for coral used in the test group 2 and the test group 1 is that there are no spurs and grooves, and the implanted nail used in the control group is a common single-leg iron nail.

And (3) carrying out coral transplantation experiments on the seven-connected coral reefs of the Xisha Islands by using the three groups of transplantation nails respectively under the same transplantation conditions.

The results showed that the survival rate of coral after 9 months of coral transplantation with η -shaped nails provided in test group 1 was 98.4%, the coral shedding rate was 0%, the growth of the surviving coral was good, and the coral tissue had grown to the bottom of the transplantation nails and coral reef.

The survival rate of the coral after the coral provided by the test group 2 is transplanted by the eta-shaped nail for 9 months can reach 95.9 percent, the coral shedding rate is 0 percent, the growth condition of the survival coral is good, and the coral tissues grow to the bottom materials of the transplanting nail and the coral reef.

The survival rate of the coral after 9 months of transplantation of the single-leg iron nail provided by the control group is only 61.9 percent, the coral shedding rate is 26.0 percent, nearly one third of the individual tissues in the survival coral are not grown on the surface of the iron nail or the coral reef substrate, the coral is not stable, and can still rotate around the iron nail under the action of sea waves and water flow.

Therefore, the eta-shaped nail for coral provided by the application can effectively and stably transplant reef-building coral at the bottom of a coral reef or on a coral reef body, reduce the coral shedding rate and obviously improve the coral survival rate. And the inner surface of the eta-shaped nail for the coral is provided with the spurs, and the outer surface is provided with the grooves, so that the survival rate of the coral can be further improved compared with the condition that the spurs and the grooves are not arranged.

In conclusion, the eta-shaped nail for coral provided by the embodiment of the invention has a simple structure and lower cost, and can be used for reef-building coral bottom sowing transplantation, so that reef-building corals can be effectively and stably transplanted at the bottom of a coral reef or on a reef, tissue death of corals caused by rotational friction is reduced, coral shedding rate is greatly reduced, and coral survival rate is obviously improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The eta-shaped nail for the coral is characterized by comprising a long foot, a short foot and a transition section, wherein two ends of the transition section are respectively connected with the long foot and the short foot to form the eta-shaped nail, and one end of the short foot, which is far away from the transition section, and one end of the long foot, which is far away from the transition section, are provided with sharp heads;

the n-shaped nail for the coral further comprises a plurality of protruding thorns which are respectively arranged on the surface of one side of the long leg close to the short leg and/or the surface of one side of the short leg close to the long leg;

the surface of one side, close to the short leg, of the long leg is provided with a first protruding spine group, the first protruding spine group comprises a plurality of first protruding spine parts, the first protruding spine parts are arranged at intervals along the axial direction of the long leg, and each first protruding spine part consists of a plurality of protruding spines arranged at intervals along the circumferential direction of the long leg;

the surface of one side, close to the long foot, of the short foot is provided with a second protruding thorn group, the second protruding thorn group comprises a plurality of second protruding thorn portions, the second protruding thorn portions are arranged at intervals along the axial direction of the foot, and each second protruding thorn portion is composed of a plurality of protruding thorns arranged at intervals along the circumferential direction of the foot.

2. The η -shaped nail for coral according to claim 1, wherein a distance between said long leg and said short leg is 0.6-2 cm.

3. The η -shaped nail for coral according to claim 1, wherein each of said first spinous processes has a length of 2 to 5mm which is extended from a surface of said long leg toward said short leg, and/or each of said second spinous processes has a length of 2 to 5mm which is extended from a surface of said short leg toward said long leg.

4. The coral η -shaped nail of claim 1, further comprising a groove provided on a surface of a side of said long leg remote from said short leg and/or a surface of a side of said short leg remote from said long leg.

5. The η -shaped coral nail as set forth in claim 4, wherein when said groove is provided on a surface of a side of said long leg remote from said short leg, a projection of said groove on a longitudinal section of said long leg is located between projections of two adjacent ones of said first spinous processes on said longitudinal section.

6. The η -shaped coral nail as set forth in claim 4, wherein when said groove is provided on a surface of a side of said short leg remote from said long leg, a projection of said groove on a longitudinal section of said short leg is located between projections of two adjacent ones of said second spinous processes on said longitudinal section.

7. Use of an η -shaped nail for coral as claimed in any one of claims 1 to 6 wherein said coral is used for reef-building coral bottom-sowing transplantation.