JP3127965U - Firefly hatching promotion device - Google Patents

Abstract

An apparatus for hatching fireflies that allows more hatching in a limited hatching space and realizes a high hatching rate.
SOLUTION: A larva breeding part 4 which becomes a breeding space for firefly larvae by storing water, and a hatching part 2A filled with soil 12 for the larva to land and hatch around the larva breeding part 4 In the firefly hatching promotion apparatus 1A provided with a plurality of hatching promotion members 20A having substantially vertical side surfaces and embedded in the soil leaving a protruding portion 20b on the soil surface. The larvae 7 disposed on the hatching part 2A, landed from the larva growing part 4 and moved on the surface of the hatching part 2A and brought into contact with the protruding part 20b of the hatching promoting member 20A, are placed in the soil along the side surfaces thereof. It was characterized by dive and starting to hatch.
[Selection] Figure 4

Description

  The present invention relates to a hatching promoting device for promoting hatching of fireflies and increasing the hatching rate.

  In recent years, activities for preserving and restoring the natural environment have become active. As part of these activities, breeding activities for fireflies and environmental improvement activities have been implemented throughout the country. This is because the recovery of the number of fireflies that can only grow in clear streams becomes a symbol of natural environment recovery and a tourism resource, so various groups will work to preserve and restore the firefly biotope (living habitat). It has become.

  In addition, various breeding techniques and breeding devices have been developed as means for promoting the reproduction of fireflies. For example, Japanese Patent Laid-Open No. 2001-178310 discloses a frame positioned above the floor sand and water surface at the bottom of the container. There has been proposed a firefly breeding method in which the soil filled inside is connected with an inclined plate to facilitate the movement of firefly larvae from the water to the land. This is because larvae grown in water need to crawl on the ground and dive into the soil in order to hatch. Yes.

  However, simply allowing the larvae to crawl on land will result in a low hatching rate if the soil condition on land is not suitable for hatching. In view of this, Japanese Patent Application Laid-Open No. 2003-225035 has proposed that a soil layer created with a composition that maintains a predetermined softness, humidity, pH, etc. with red bean clay as a main component is created as a hatching place. . As a result, the landed larvae are more likely to hatch, and the hatching rate and further the hatching rate can be improved.

  By the way, when firefly larvae hit an obstacle with a vertical surface such as a stone that protrudes from the soil while crawling on the ground after landing, they dive into the soil along the vertical surface and interfere in the soil. Has the habit of hatching by snuggling up to the vertical surface of things. Therefore, for example, when a larva breeding vessel is installed near a natural river, if there are few obstacles with a suitable vertical surface around it, it will eventually hatch even in a place without an obstacle. However, spending a long time on the ground before diving into the soil will weaken the larvae and will often fail to hatch.

In addition, when installing an artificial firefly aquaculture device with hatching space, the hatching location concentrates on the inner wall surface of the soil enclosure because it is difficult to secure a large hatching space due to the structure of the device. For this reason, there were many cases where hatching also failed. Therefore, in the case of providing a device for promoting hatching, enabling more successful hatching with a minimum hatching space leads to efficient firefly breeding. Therefore, a technology for realizing this has been desired.
Japanese Patent Laid-Open No. 2001-178310 JP 2003-225035 A

  The present invention is intended to solve the above-mentioned problems, and a device for hatching fireflies enables more hatching in a limited hatching space and realizes a high hatching rate. The challenge is to make it possible.

  Therefore, the present invention is a larva breeding section that becomes a breeding space for firefly larvae by storing water, and an hatching section filled with soil for landing and hatching larvae around this larva breeding section, A plurality of hatching promoting members embedded in the soil, having a substantially vertical side surface and leaving a protruding portion on the soil surface. The larvae landed from the larvae breeding part, moved on the surface of the hatching part, and contacted with the protruding part of the hatching promotion member, dive into the soil along the side surface and start hatching It was supposed to be.

  In this way, the soil is retained by disposing a plurality of hatching promoting members in the hatching part as a thing that uses the habit of submerging in the soil along the obstacle abutted while the landed larvae crawling. In addition to the inner wall surface of the enclosure member, a large number of hatching places can be provided, and larvae can dive into the soil in a relatively short time, making hatching difficult to fail.

  Further, the hatching promoting member is assumed to be a plate material having a predetermined width, which is provided so as to face the larva growing part so that the width direction is substantially perpendicular to the hatching part and is inserted substantially perpendicularly into the soil of the hatching part. For example, the larvae that crawl out from the larvae breeding part have many chances of coming into contact with the protruding part, or the hatching promoting member is provided as a substantially square pillar-shaped pile material inserted into the hatched part of the soil almost vertically. All four sides can be used for hatching.

  Furthermore, in the hatching promoting device described above, the hatching promoting member is arranged such that at least a plurality of the hatching promoting members are arranged so as to surround the periphery of the larva growing part with a predetermined interval. If the arrangement of the hatching promoting members in the outer row is substantially on the extension line from the larva growing portion passing through the gap portion of the hatching promoting members in the inner row, the larva growing portion crawls out and is substantially centrifuged. The larva moving in the direction tends to come into contact with any hatching promoting member.

  Furthermore, the hatching promoting device described above has a bottom plate and a side wall plate as a whole and is an upper open type container, and is relocated as a whole, filled with soil and provided with a larvae breeding unit in the approximate center. If possible, it would be relatively easy to start firefly hatching promotion work anywhere by simply installing it.

  According to the present invention in which a plurality of hatching promoting members are arranged in the hatching portion, more hatching can be succeeded in a limited hatching space, and a high firefly hatching rate can be realized. It is.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1: has shown the top view of the firefly hatching promotion apparatus 1A which is 1st embodiment in this invention. The hatching promoting apparatus 1A has a predetermined composition suitable for hatching of a water tank type container 10 having an open top formed of side wall plates 10a, 10b, 10a, 10b and a bottom plate 10c, and a firefly filled in the storage chamber 10d. And a boat-shaped container 14 having a lower portion embedded in the soil 12 and an upper portion exposed on the surface of the soil 12, the boat-shaped container 14 being filled with water. The larva growing part 4 for growing larvae is configured, and the portion filled with the soil 12 around the boat-shaped container 14 in the accommodation chamber 10d constitutes the hatching part 2A for the larvae to hatch.

  The larva breeding unit 4 is not shown in a position where a water supply pipe or the like (not shown) is disposed during use to replenish fresh water and feed a river trout or the like as a bait, and is opposite to the water supply position. A water discharge pipe and the like are arranged so that water can be discharged, and a growth environment suitable for firefly larvae is maintained. Further, as shown in FIG. 2 which is a cross-sectional view taken along the line XX of FIG. 1, the side plates 14a and 14b forming the larva breeding section 4 are inclined at about 45 degrees, so that the larvae land when they land. The angle is easy to crawl out.

  A plurality of bill-shaped hatching promoting members 20A are exposed on the soil 12 in the hatching part 2A, which is a place where hatching occurs when larvae land around the larva growing part 4. The feature of the present invention is that it is placed in the soil with the side face vertical and left.

  The hatching promoting members 20A are arranged in duplicate so as to surround the periphery of the larva growing part 4 at a predetermined distance, and each hatching promoting member 20A is arranged in the larva growing part 4. It is arrange | positioned so that the width direction may become a substantially right angle toward. Further, the arrangement of the hatching promoting members 20A in the outer row is on the substantially extended line from the larva growing portion 4 passing through the gap portion of the hatching promoting member 20A in the inner row, that is, the inner row as viewed from the larva growing portion 4. Are arranged so as to be filled with the outer row hatching promoting members 20A, and the larvae that have progressed radially from the larva growing part 4 in the centrifugal direction have many chances of coming into contact with the side surfaces of the hatching promoting members 20A. It is supposed to be.

  By adopting such a configuration of the hatching part 2A, while the larvae that have spawned from the larvae breeding part 4 crawl on the soil 12 of the hatching part 2A, the protruding part of any hatching promoting member 20A It abuts on the vertical side surface of 20b and decides it as a hatching place, and dives into the soil along the side surface to start hatching.

  Therefore, for example, when a large number of larvae of about 1000 are grown in the larva growing part 4, in the conventional example, there are not enough hatching sites on the inner side surfaces of the side wall plates 10a, 10b, 10a, 10b, and the hatching sites are easy to hatch. In many cases, it took time to search for hatching and failed to hatch, but by arranging a plurality of hatching promoting members 20A having vertical portions as in the present invention, more larvae could be obtained in a short time. Find a hatching place and succeed in hatching.

  Referring to the enlarged longitudinal sectional view of FIG. 4, the operation of the hatching promoting device 1A of the present embodiment will be described. When the firefly larvae 7 grow to some extent in the larva breeding section 4, the side plates 14a are inclined. To the outside and land on the hatching part 2A. The landed larva 7 proceeds so as to move away from the larva breeding section 4 over the surface of the soil 12. As described above, since the larvae 7 have the habit of submerging in the soil along the vertical plane when the larva 7 comes into contact with the obstacle having the vertical plane, the larva 7 is exposed to the exposed portion 20b of the first hatching promoting member 20A. By abutting, it dives into the soil, forms a clay 8 and hatches inside to form a clay 9.

  On the other hand, the larvae 7 that have not contacted the first hatching promotion member 20A proceed further and contact the second hatching promotion member 20A, so that they dive into the soil and start hatching. And the larva 7 which did not contact | abut also to the 2nd hatching acceleration | stimulation member 20A finally contact | abuts to the inner surface of the side wall board 10a, and it begins to dive into the soil and to hatch. In this way, the larva 7 that crawls through the hatching part 2A has more chances to find the hatching place, and it takes time to find the hatching place in the past, and weakens on the ground surface and fails to hatch. In many cases, the hatching can be started in a relatively short time, so that the probability of hatching failure can be greatly reduced.

  FIG. 3: has shown the top view of the firefly hatching promotion apparatus 1B which is 2nd embodiment in this invention. The hatching promotion device 1B has a square pillar pile shape instead of the bill-like hatching promotion member 20A disposed in the hatching portion 2A of the hatching promotion device 1A. It is characterized in that the conversion promoting member 20B is provided. Thereby, in the above-described hatching promoting member 20A, the side surface portion in the thickness direction has a narrow width and is difficult to become a hatching place, whereas the hatching promoting member 20B has a predetermined width on all side surfaces. All four sides are easy to use as hatching sites, and more larvae can hatch.

  FIG. 5 is a perspective view showing an actual usage example of the hatching promoting apparatus 1A of the first embodiment. Since the hatching promotion apparatus 1A has the bottom plate 10c, it can be moved to a place suitable for forming a firefly biotope, for example, near a natural stream after being created indoors. It is easy to carry out hatching promotion work. When installing outdoors like this, it is recommended to install a shielding structure such as the roof 15 as shown in the figure so that the larvae of the larva breeding section 4 are not exposed to direct sunlight or targeted by birds. Is done.

  Moreover, when installing in nature in this way, it becomes difficult to impair a natural scenery by using cedar bark etc. for the surface of the roof 15, and using natural materials, such as a bamboo material, for a suppressing member. Further, if other members constituting the hatching accelerating device 1A are also made of wood, it is easy to harmonize naturally and is excellent in maintaining the internal environment such as humidity control. Further, as shown in the figure, the water supply pipe 16 is pulled from the stream into the larva growing section 4 so that fresh water can be always supplied, and a drain pipe (not shown) is provided via the soil, and the larva growing section 4 It is recommended that a good larva breeding environment can be maintained within.

  On the other hand, the hatching promotion apparatuses 1A and 1B described above can be used in artificial facilities such as indoors as long as the water in the larva growing part 4 can be maintained in a fresh state at an appropriate temperature. In this case, in the conventional example, when searching for a soil containing a cocoon and moving it to another place or securing an adult, find other than the soil that is in close contact with the side walls 10a and 10b. However, if the hatching promoting members 20A and 20B are searched for in the present invention, it is advantageous in that the soil can be easily found.

  As shown in the cross-sectional view of FIG. 4, the side plate 14a of the larva growing part 4 forms an overhanging surface in the soil 12, so that the larva 7 deeply dive along this or the side plate 14a after emergence. You may not be able to get out on the ground. On the other hand, if a plate perpendicular to the outside of the side plate 14a is further arranged so as to cover all overhang surfaces, this problem can be solved and the emergence rate can be further increased. Further, in the case where the hatching promoting device 1A of the present invention is disposed outdoors as shown in the perspective view of FIG. 5, in addition to covering the larva growing part 4 with the roof 15, further covering the entire device from above, If the fly sheet is provided, the hatching portion 2A can be prevented from being exposed to wind and rain or direct sunlight, and the emergence rate can be further increased.

  As described above, the firefly hatching apparatus can be hatched more in a limited hatching space by the present invention. In addition, this makes it possible to realize a high emergence rate of fireflies.

The top view which shows 1st embodiment of this invention. Sectional drawing which follows the XX line of FIG. The top view which shows 2nd embodiment of this invention. The expanded longitudinal cross-sectional view for demonstrating the effect | action of the hatching promotion apparatus of FIG. The perspective view which shows the actual use condition of the hatching promotion apparatus of FIG.

Explanation of symbols

  1A, 1B hatching promotion device, 2A, 2B hatching part, 4 larvae breeding part, 7 larvae, 8 earthenware, 9 cocoons, 10 water tank type container, 10a, 10b side wall plate, 10c bottom plate, 10d accommodation chamber, 12 soil , 14 boat-type container, 14a, 14b side plate, 15 roof, 16 water supply pipe, 20A, 20B hatching promoting member, 20b protruding portion

Claims (5)

Firefly pupae provided with a larva breeding part that serves as a space for raising firefly larvae by storing water, and a hatching part filled with soil for the larvae to land and hatch around the larvae breeding part In the accelerating device,
A plurality of hatching promoting members embedded in the soil having a substantially vertical side surface and leaving a protruding portion on the soil surface are disposed in the hatched portion with a space between each other, and land from the larva growing portion Then, the larvae that moved on the surface of the hatching part and contacted the protruding part died into the soil along the side surface and started hatching,
A device for promoting the hatching of fireflies.   The hatching promotion member is a plate material having a predetermined width, and the plate material is provided so as to face the larva growing portion so that the width direction is substantially perpendicular to the hatching portion so as to be inserted substantially vertically into the soil of the hatching portion. The apparatus for promoting hatching of fireflies according to claim 1, wherein   The hatching promoting member is a substantially square pillar-shaped pile material, and the pile material is provided by being inserted substantially perpendicularly into the soil of the hatched portion. Firefly hatching promotion device.   The hatching promoting member is arranged such that at least a plurality of the hatching promoting members arranged continuously around the larvae-growing part with a predetermined distance from the larvae-growing part are provided. 4. The firefly hatching according to claim 1, wherein the arrangement of the firefly is on a substantially extended line from the larva growing part passing through a gap portion of the hatching promoting member in the inner row. Promotion device.   The apparatus for promoting hatching of fireflies according to claim 1, 2, 3 or 4 has a bottom plate and a side wall plate, and is formed into a top-open container shape as a whole, filled with soil inside, and substantially at the center. A firefly hatching promotion device characterized by comprising a larvae breeding section and capable of being transferred as a whole.

Images