JP3001663U - Rearing tank for growing firefly larvae at the end of life - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a breeding tank capable of improving the yield rate until the larvae of fireflies at the end of their life become adults during artificial growth of fireflies. [Structure] Partition walls 2, 2 and 2 each having an open top surface and provided at predetermined intervals along the longitudinal direction are used to define a first partition 1a, a second partition 1b, a third partition 1c, and a fourth partition 1a.
A breeding tank 1 that is divided into each of the compartments 1d, and further has a volcanic ash layer 4 provided on the inner bottom of these compartments,
The breeding tanks 1 are connected to each other and can be embedded in the soil with the open upper surface exposed, and the partition wall 2 has a mesh frame 3a in which a mesh body 3 is stretched. Partition wall structures 2a, 2b so that they can be detachably inserted
Is formed by standing upright.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a breeding tank for growing firefly larvae at the end of life.

[0002]

[Prior art]

 In the past, fireflies spontaneously grew in large numbers on the banks of rivers and ponds and were popular with people as a summer feature. The number has fallen sharply. For this reason, for example, an artificial river for breeding fireflies is created, and the larvae of the fireflies are thrown together with the kawana (feeding scallops), which are their food, to raise the artificial fireflies. However, in artificial rivers that are usually constructed, larvae cannot fully ingest the food due to the fact that the food has run down due to running water. However, the rate of larvae that successfully grew and became adults was extremely low due to reasons such as weakness in changes in water quality and water temperature.

The present applicant has previously proposed a firefly aquaculture device (Japanese Patent Application No. 2-73244) in order to solve the above problems and increase the yield rate from larvae to adults. Basically, it promotes good growth at the larval stage.Because the larvae rise from the water before they become adults and make cocoons in the soil to become pupae, they grow to a certain extent and reach the final stage. The larvae that have reached the level must be done in an environment with soil nearby. Conventionally, the soil is dug with a width of 50 cm and a depth of 2 cm, and water is drawn from nearby rivers to artificially create rivers. The artificial larvae were cultivated in the artificial river, and the larvae that had reached the end-of-life period were released into the artificial river, and the larvae at the end-of-life stage were grown in the river until they landed to become pupa.

[0004]

[Problems to be solved by the device]

 However, growing larvae in such an artificial river has the same problems as the above-mentioned rearing method, and even if the larvae are grown until the end of their instars, all of them will be adults. I couldn't.

The present applicant has completed the present invention as a result of solving the above-mentioned problems and conducting diligent research in order to further improve the yield rate from larva to adult.

[0006]

[Means for Solving the Problems]

 The artificial river structure for growing firefly larvae in the final stage of the present invention has an open top surface and is internally partitioned by a plurality of partition walls provided at arbitrary intervals in the longitudinal direction, and each partition It is a box-shaped breeding tank in which volcanic ash is spread over the inner bottom and a fine mesh that can be freely attached and removed is provided above the partition wall. It is characterized in that it is configured to be exposed and buried in the soil or placed on the soil.

Further, in the present invention, the partition wall may be formed so as to be gradually lowered from the upstream side.

[0008]

【Example】

 An example of a breeding tank for growing firefly larvae at the end of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the breeding tank 1 of the present invention in which the open upper surface side is exposed and buried in the soil.

The breeding tank 1 for growing firefly larvae at the end of the present invention has a partition wall 2, 2 and 2 having an open top and provided at predetermined intervals along the longitudinal direction thereof. Are divided into the first section 1a, the second section 1b, the third section 1c, and the fourth section 1d, respectively. As shown in the figure, a plurality of them are connected and the upper surface of the opening is exposed to expose the soil. It is constructed so that it can be buried. When connecting a plurality of breeding tanks 1, the connecting portion 8 is provided with notches 9 and 9 in an arbitrary shape so that the injected water can flow to all of the breeding tanks 1, 1 ′ ,. Be provided.

In the present invention, the partition wall 2 provided in the breeding tank 1 has a mesh frame 3a in which a mesh body 3 is stretched between the partition wall constituents 2a and 2b at a predetermined interval as shown in the figure. It is erected so that it can be detachably inserted. Further, the net body 3 stretched over the net frame 3a has such a mesh that it is possible to prevent larvae and kawarina released into each compartment from moving to other compartments as described later. There is no particular limitation as long as it is fine.

Furthermore, in order to make the larvae's habitat environment favorable, the larvae dive and hide themselves at the inner bottoms of the compartments 1a, 1b, 1c, 1d defined by the partition wall 2 of the present invention. A volcanic ash layer 4 is provided by spreading volcanic ash so as to be able to do so.

The breeding tank 1 of the present invention is buried in soil as described above, and water is poured from the water injection pipe 7 or the like into the first section 1a so as to spread the water to each section. The larvae are allowed to grow in one compartment by releasing a certain number of them together with the kawana that serve as food in the compartment, and the larvae are excessively concentrated in one place or the kawana that is the bait flows down. The breeding environment such as the number of larvae and securing food can be easily managed without causing any accident.

Further, waste such as larvae excrement is sucked up by the upper stream of water and captured by the net body 3 provided above the partition wall 2, and the fine waste does not float in the water. Water is less likely to deteriorate because it is occluded in the layer 4, and even if the amount of dirt trapped by the mesh 3 increases and the water quality is adversely affected, the mesh 3 can be separated with the mesh 3a. As it can be replaced, this can easily prevent the deterioration of water quality. If there is no particular need, the mesh body 3 may be fixed above the partition wall 2 instead of being configured to be detachable.

The larvae grown in the breeding tank 1 of the present invention as described above land at a certain time, make a cocoon in the soil to form pupae, and then emerge to grow into adults. Since a sufficient amount of food can be ingested by the larva in a favorable environment, the larvae grow well until the larvae of fireflies at the end of their life become pupae, and the larvae grow from the larvae. It is possible to further improve the yield rate to the conventional method.

In addition, fireflies have the habit of finishing a short life of about 15 to 20 days in the vicinity without leaving far from the place where they emerged. For this, the fireflies emerge from the pupa and emerge as adults. In the early days of the year, most of them are usually male, and then the proportion of females gradually increases and the proportion of males and females becomes the same at the peak of adulthood. It is considered that the males who became adult before do not leave the place where they emerged due to mating, and the females that mated lay eggs on moss at the water's edge for several days. Therefore, the breeding tank 1 of the present invention may be buried in the soil or placed on the soil at any place to breed the larvae in the final stage in the breeding tank 1 and make it easy to land. In this case, since the adult firefly has the above-mentioned habits, it is not necessary to surround it with a net to prevent the fireflies from escaping, and to prevent the firefly from escaping at any place without damaging the scenery. You can enjoy the appreciation.

In the description of the breeding tank 1 of the present invention, a configuration in which a plurality of breeding tanks 1 are connected and the upper surface to be opened is exposed and buried in the soil is given as an example. The breeding tank 1 can be used alone, or as shown in FIG. 3, the breeding tank 1 can be used by placing it on the soil without burying it in the soil. Furthermore, if the partition wall 2 is formed so as to be gradually lowered from the upstream side, water can be poured even if the breeding tank 1 is buried or the place where it is placed is a flat place without inclination. The flow of water can be prevented. Although the size of the breeding tank 1 is not particularly limited, it is usually formed to have a width of 450 to 600 mm, a length of 1500 to 1800 mm, and a depth of 50 to 60 mm.

[0017]

[Effect of device]

 As described above, the breeding tank of the present invention is exposed in the upper surface side of the opening and is buried in the soil or placed on the soil, and by using this, the larvae of fireflies at the end of life can be grown. Since the larvae can be ingested a sufficient amount of food under various breeding environments, the larvae are allowed to grow well until they become pupae, and the yield rate from larvae to adult larvae is further improved in comparison with the conventional method. Can be improved.

Further, since fireflies have the habit of not going far away from the place of emergence, if a breeding tank for the inventor of the present invention is provided and the fireflies are bred in the breeding tank, nets, etc. It is not necessary to enclose the surrounding area with and keep the adult fireflies from escaping, and you can enjoy watching fireflies at any place without damaging the scenery.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which one example of a breeding tank for growing firefly larvae at the end of the present invention is buried in soil.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing another example of a breeding tank for growing firefly larvae at the end of the present invention.

[Explanation of symbols]

 1 Breeding tank 1a 1st division 1b 2nd division 1c 3rd division 1d 4th division 2 Partition wall 3 Net body 4 Volcanic ash layer 5 Ground

Claims (6)

[Scope of utility model registration request] 1. An inner surface is partitioned by a plurality of partition walls having an open upper surface and provided at arbitrary intervals in the longitudinal direction, and volcanic ash is spread over the inner bottom of each partition, and above the partition walls. Is a box-shaped breeding tank provided with a fine mesh, and is configured to be buryable in the soil with its open upper surface exposed. A breeding tank for growing firefly larvae. 2. The inside is partitioned by a plurality of partition walls having an open upper surface and provided at arbitrary intervals in the longitudinal direction, and volcanic ash is spread over the inner bottom of each partition, and above the partition walls. Is a box-shaped breeding tank with a fine mesh, and is constructed so that it can be placed on the soil for breeding larvae of fireflies at the end of life. Tank. 3. An inner surface is partitioned by a plurality of partition walls having an open upper surface and provided at arbitrary intervals in the longitudinal direction, and volcanic ash is spread over the inner bottom of each partition, and above the partition walls. Is a box-shaped breeding tank in which a fine mesh is detachably provided, and is characterized in that it can be embedded in the soil with the open upper surface exposed. A breeding tank for growing firefly larvae at the age of instar. 4. The interior is partitioned by a plurality of partition walls having an open upper surface and provided at arbitrary intervals in the longitudinal direction, and volcanic ash is spread over the inner bottom of each partition, and above the partition walls. Is a box-shaped breeding tank with a fine mesh removably installed, and is configured to be placed on the soil to grow firefly larvae at the end of life. Breeding tank for. 5. The inside is partitioned by a plurality of partition walls having an open upper surface and provided at arbitrary intervals in the longitudinal direction, and volcanic ash is spread over the inner bottom of each partition, and the partition walls are upstream. It is a box-shaped breeding tank that is formed so that it gradually lowers from the side, and a fine mesh is provided above the partition wall, with the upper surface of the opening exposed. A breeding tank for growing firefly larvae at the end of life, which is characterized in that it can be buried in the soil. 6. The interior is partitioned by a plurality of partition walls having an open upper surface and provided at arbitrary intervals in the longitudinal direction, and volcanic ash is spread on the inner bottom of each partition, and the partition walls are upstream. It is a box-shaped breeding tank that is formed so that it gradually decreases from the side, and a fine mesh is further provided above the partition wall, and is configured to be placed on the soil. A breeding tank for growing firefly larvae at the end of life.