KR20090119244A - Destruction fertilized eggs of micropterus salmoides via artificial spawning ground - Google Patents

Abstract

PURPOSE: A saving of bass fertilized egg using an artificial scattering filed is provided to induce scattering of bass and save fertilized egg. CONSTITUTION: A saving of bass fertilized egg using an artificial scattering field is performed at rectangular frame of 0.5-1.5m of width, 0.5-1.5m of length, and 10-15cm of height. The bottom substrate for scattering bass eggs uses 20-35mm of gravel. The installation gap for protecting from the other fishes is more than 5m.

Description

Destruction fertilized eggs of Micropterus salmoides via artificial spawning ground}

The present invention relates to the relief of bath fertilized eggs using artificial spawning.

The present invention connects a basket, a stainless steel frame, and a dull to each other to make a main body, and connects an object for buoyancy to create an artificial spawning field, and installs an artificial spawning place where the bass finds for spawning. At this time, the size of the artificial spawning field has a rectangular frame of 1m in width, 1m in length and 10cm in height. In addition, because the bath makes the spawning ground on the gravel ground, gravel of 30mm diameter should be used as the substrate of the artificial spawning ground. Substrates should be laid under 10 cm.

The present invention relates to the relief of bath fertilized eggs using artificial spawning.

According to the present invention, as a foreign introduced fish, bass having an adverse effect on the aquatic ecosystem can be induced into an artificial spawning field, and the fertilized eggs can be initially removed.

The present invention induces spawning by inducing spawning to the artificial spawning ground, which is a major damage to the aquatic ecosystem as an alien introduced fish species, and the fertilized egg is initially removed.

Effect of Bath on Ecosystem

Baths introduced in Korea are among the top predators in aquatic ecosystems. In stable ecosystems, the population of the highest predators is extremely limited, but if imbalances are caused by any factor, it can be chained to the biomass of each trophic stage, resulting in ecosystem degradation. do. For this reason, most predators do not breed in large quantities. However, bass spawn a large amount of eggs (about 125,000 eggs per 40cm in length) and protect the larvae after hatching, thereby rapidly decreasing the initial mortality rate in Korea.

Problems caused when the bath enters a stable water ecosystem

1. As mentioned in the feeding ecosystem, the predation of baths not only reduces the population of various native fish, but also kills some species.

2. The basal larvae of basal larvae are zooplankton, such as daphnia and copepods, which are identical to that of common native larvae. In other words, the fry of native fish are not only unstable in growth and development due to food competition, but they also fail to breed by being fed to the fry of bass grown to a certain size.

3. Various invertebrates, including shrimps that feed on organic matter, are fed and reduced or exterminated.

4. Affect terrestrial ecosystems by predating terrestrial animals that use aquatic ecosystems for spawning or habitat.

5. The decline in benthic English, which acts as an intermediary in the breeding of freshwater bivalve, reduces the population of bivalve.

As mentioned above, as a result, aquatic ecosystems are depleted of species diversity by baths and lose their self-cleaning ability. In these aquatic ecosystems, pollutants continue to accumulate and cause eutrophication, which causes frequent hydration such as green algae. This series of processes accelerates water pollution.

Therefore, in order to solve the above problems, the present invention intends to relieve the fertilized egg of the bath at the beginning by investigating the time and condition of the spawning spawning artificial spawning.

The present invention is directed to inducing spawning of a bath using an artificial spawning field and to initially rescue the fertilized egg.

Baths make spawning conditions under certain conditions. Therefore, artificial spawning field may be manufactured using these conditions, and the spawning may be induced and then removed from the fertilized egg. The structure and location and timing of the artificial spawning are as follows.

1. Form: The form should be able to sufficiently accommodate the substrate, be easy to transport and install, and larger than the size of the natural spawning ground. Therefore, the rectangular frame of 1m in width, 1m in height and 10cm in height is used as the basic type.

2. Substrate: Because the bath makes spawning ground on the gravel floor, the substrate of artificial spawning ground should use gravel of 30mm diameter. Substrates should be laid under 10 cm.

3. Wall: As seen from the natural spawning basin, the bass is used as a cover for a large stone facing the lower side. Therefore, one side of the artificial spawning site should create a black wall. The height of the wall should be about 30cm.

4. Installation time and maintenance: Install only until late April and late June, the spawning season of the bass. After installation, check for spawning at intervals of about 3 days. The spawning artificial spawning area is demolished and completely removed after the fertilization.

5. Location: As the bath is a spawning ground, substrate selectivity is strong, so the bottom of the installation site will be most effective with sand. Even if the bed is a gravel body, it would be possible to install it if there were no cover to use as a wall. In addition, the slope of the lower bed is preferably flat below 15 °, and the water depth should be installed at 1m and 2m, respectively.

6. Spacing: The spawn guards must protect the spawning grounds so that the spacing must be at least 5m.

Remedies using artificial spawning ground

If the water temperature fluctuates differently depending on the region, it is important to know the water temperature fluctuations and to make an annual schedule before the bath spawns.

Schedule plan

Basin spawning time is around 15 ℃ → Artificial spawning place is installed before spawning time.

→ Observe and remove artificial egg cages three to four days a week after installation.

According to the present invention, the artificial spawning field was installed in the place where the bass were supposed to spawn, and as a result, spawning of the baths could be induced and fertilized eggs of the unhatched baths could be saved.

The present invention relates to the relief of bath fertilized eggs using artificial spawning.

Remedy using artificial spawning ground

1. If the water temperature fluctuates differently depending on the region, it is important to identify the water temperature fluctuations in advance and make an annual schedule, because the bath spawning time is different.

Schedule plan

1. The spawning season of the bath is around 15 ℃ → install the artificial spawning ground before the spawning season.

→ Observe and remove artificial eggs three to four days a week after installation.

1 is an artificial scattering field of the bath produced.

2 is a schematic diagram of a basket.

3 is a schematic diagram of a stainless frame.

4 is a schematic diagram of a dull net.

5 is a schematic of the combined mesh and stainless frame.

Figure 6 is a schematic diagram of the combined basket and the net.

Figure 7 is a schematic diagram connecting the buoyancy material to the artificial scattering field.

8 is a bath egg (yellow) scattered in an artificial spawning field.

Claims (2)

The present invention relates to the relief of basal fertilized eggs using artificial spawning, the size of the artificial spawning is 0.5-1.5m in width, 0.5-1.5m in length, 10-15cm in height rectangular frame as a basic type. In order to meet the spawning conditions of the bath in claim 1, the bottom substrate uses about 20-35 mm of gravel.

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