JP2750615B2 - Ecological survey method of shellfish using labeled shellfish - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention releases a labeled shell formed by giving a special color into a natural shell and investigates the ecology of the shell based on the labeled shell. How to do it.

[Conventional technology]

In order for shellfish such as abalone to grow in natural waters, it is desirable to expand the water area that satisfies the living environment conditions suitable for growth.To that end, it is necessary to investigate the ecology of abalone and the environmental conditions surrounding it. Based on our findings,
There is a need to develop appropriate and effective methods of water area expansion.

For such development, it is essential to monitor the ecology of abalone in natural waters. As a specific method, abalone tagging surveys are being conducted.

In this abalone tagging survey, a specific abalone that has been marked is released into natural waters as a tagged abalone, and the subsequent ecology is observed. As a method for marking abalone, conventionally, for example, see FIG. As shown in FIG. 8, a paint 11 such as paint is applied to the surface of the shell of the abalone 6 with a brush or a spray, a metal tag 12 is attached thereto, or the shell is formed using a cutting tool such as a chisel. A part of the surface was scraped off and scratches 13 were made.

[Problems to be solved by the invention]

In such a sign, for example, a coating method using paint is easy to peel off, and if there is an adhering substance on the surface of the shell, it is difficult to distinguish it from the marking part. There is a risk of corrosion or loss during the period, and the method of directly scratching the shell surface of the shell has a problem that the shell body is damaged and the shell cannot be regenerated.

In addition, in each case, solid identification after release is difficult because the humans directly check the presence or absence of markings for each shellfish, and it is difficult to identify them. In particular, finding and discriminating in water is a difficult task, and it is difficult to obtain sufficient data for exploring living environment conditions suitable for the development of abalone.

An object of the present invention is to eliminate the disadvantages of the conventional example, to apply a label without damaging the shell, and to use an artificial dye that is not found in natural shells as a label, so that it takes a long time to exhibit an adhesion effect. Can be used as labeled shellfish, regardless of whether they are young or adult, and there is no danger that the marker will disappear on the way even after a long period of release from the labeled shellfish. Using a computer, the classification of labeled shellfish and natural shellfish is performed, so the accuracy of the data can be improved, and the labeled shellfish that can provide sufficient data for exploring living environment conditions suitable for the development of abalone and other shellfish were used. An object of the present invention is to provide a method for investigating shellfish ecology.

[Means for solving the problem]

The present invention achieves the above object by adding carbohydrates and the like to a fishmeal base material as an artificial bait, and adding an artificial pigment which is not shown in natural shellfish to a small cracked shape hardened with alginic acid. Are placed in parallel with a corrugated sheet, and the artificial pigment contained in the artificial bait is artificially grown on the corrugated sheet. ~ 3 cm in the range of artificial color, the other part is a natural color, and thus the labeled shellfish labeled with the artificial coloring part with artificial pigment is discharged into natural waters, Catch natural shellfish and labeled shellfish, and detect the shell color by applying a colorimeter to the surface of the shell of the labeled shellfish and the natural shellfish. And saturation are shown by numerical values in the chromaticity diagram, and based on this numerical value, In particular, when artificial pigments are detected from the high brightness, the computer sorts the labeled shellfish and natural shellfish, and simultaneously measures the shell length and weight of the caught shellfish using an automatic shell length and weight measurement device. The results of this measurement are stored in an automatic storage device and analyzed by the computer to collect and arrange the data obtained from the labeled shellfish, and the growth, ecology, behavior, living environment conditions, etc. of shellfish living in natural waters The main purpose is to obtain the materials described above.

[Action]

According to the present invention, since an artificial food to which an artificial pigment which is not found in natural shellfish is added is used, it is not necessary to take a long time to exhibit the adhesion effect, and thus the time required for the adhesion is short. Not only juvenile but also adult shellfish can be adopted as the labeled shellfish. Since the labeled shellfish thus formed only exhibits an artificial color within a range of about 1 to 3 cm around the shell base of the labeled shellfish, the artificial pigment is transferred to the entire shell and becomes visually pathological. There is no need to replace with natural shellfish. In addition, since this artificial pigment has a color that is not found in natural shellfish, there is no risk that the labeled shellfish will disappear completely in the middle even if the shell color becomes dull due to the passage of a long time after release . In addition, since this labeled shellfish is grown on a corrugated board on which artificial food is arranged, mass production is possible.

In addition, the artificial pigments of the labeled shellfish are distinguished from the pigments of the natural shellfish by their lightness, and the accuracy of the data can be improved by using a computer to distinguish between the labeled shellfish and the natural shellfish. Sufficient data can be obtained for exploring suitable living environment conditions for shellfish development.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a growing state of a labeled shellfish showing an embodiment of a method for investigating the ecology of a shellfish using the labeled shellfish of the present invention, and FIG. 2 is a perspective view of the labeled shellfish, wherein a labeled abalone is used as the labeled shellfish. In order to grow a labeled abalone, a small cracked algae prepared by adding carbohydrate or the like to a conventionally known fishmeal (sardine fish meal) base material as an artificial bait 2 on a corrugated sheet 1 and alginate acid. For example, those to which a green pigment is added as an artificial pigment not shown in natural abalone are arranged.

The artificial seedling abalone 3 as a labeled shell made of juveniles and adult shells artificially grown with this artificial feed has its pigment transferred to the shell, and a green area of about 1 to 3 cm around the shell base appears. Is brown, which is a natural color, and as shown in FIG. 3, the entire shell has a completely different shell color from the natural brown abalone 5 of a single color.

In this way, the artificial seedling abalone 3 in which a part of the shell is formed with a green portion, which is a color not shown in the natural abalone 5,
Becomes a labeled abalone 6 with the green artificially colored portion as a marker 4 (see FIG. 2).

Then, to release the labeled abalone 6 into the natural waters as a released shellfish, and to conduct a subsequent investigation, a colorimeter 7 is provided on the surface of the caught abalone 6 and the natural abalone 5 shell as shown in FIG. The detected shell color is detected, and the detected value is input to a computer 10. The computer 10 detects a green shell color from the sign abalone 6 based on the detected value of the colorimeter 7, thereby detecting the sign. Abalone 6 and natural abalone 5 are sorted.

The difference in the shell color between the labeled abalone 6 and the natural abalone 5 obtained experimentally is shown below by numerical values in the chromaticity diagram of hue and saturation shown in FIG. Note that L indicates lightness.

According to this, natural abalone 5 shows a red tendency,
It can be seen that labeled abalone 6 shows a green tendency. Then, based on this numerical value, the computer 10 selects the labeled abalone 6 by detecting the green color of the artificial pigment, particularly from the high brightness, and the selected labeled abalone 6 is automatically hull length. The shell length and weight are simultaneously measured using the weight measuring device 8, and the measurement results are stored in the automatic storage device 9,
In addition, if analyzed by the computer 10, the data obtained from the labeled abalone 6 can be easily collected and arranged, and data on the growth, ecology, behavior, living environment conditions, etc. of abalone living in natural waters can be obtained.

Further, since the marker 4 is formed as a part of the shell color, there is no possibility that the marker 4 will disappear even after a long period of time.

〔The invention's effect〕

As described above, the method for investigating the ecology of shellfish using the labeled shellfish of the present invention can attach a label without damaging the shell, and uses an artificial dye that is not found in natural shellfish as a label, so that the adhesion effect is reduced. It is not necessary to take a long time to present the fish, and it can be used as a labeled shellfish, regardless of whether it is a juvenile or adult shellfish. Absent. In addition to this, a computer is used to select between labeled shellfish and natural shellfish, so that the accuracy of the data can be improved and sufficient data can be obtained to search for suitable living environment conditions for the development of abalone and other shellfish. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a growing state of a labeled shellfish showing an embodiment of a method for investigating a shellfish ecology using the labeled shellfish of the present invention, FIG. 2 is a perspective view of the labeled shellfish, and FIG. 3 is a perspective view of a natural shellfish. FIG. 4 is an explanatory diagram showing a sorting state of the labeled shellfish, FIG. 5 is a chromaticity diagram of hue and saturation, and FIGS. 6 to 8 are perspective views showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Corrugated board 2, ... Artificial feed 3 ... Artificial seedling abalone 4, ... Sign 5 ... Natural abalone, 6 ... Sign abalone 7 ... Color difference meter, 8 ... Automatic shell length and weight measuring device 9 ...... Automatic storage device, 10 Computer 11 Paint, 12 Metal tag 13 Scratches

Claims (1)

(57) [Claims] Claims: 1. A fish meal base material as an artificial feed, which is made by adding carbohydrates and the like and hardened with alginic acid, is made into a small cracker-like material, and an artificial pigment which is not shown in natural shellfish is added to a corrugated plate. Then, the artificial shellfish artificially grown on this corrugated sheet, the labeled shellfish by the artificial shellfish, the artificial pigment contained in the artificial bait migrates to the shell, and the shell base is about 1-3 cm around the shell base.
In the range of the artificial color, the other part is a natural color, in this way, release the labeled shellfish with the artificial coloring part with artificial coloring as a marker into the natural waters,
Catch natural shellfish and labeled shellfish, and detect the shell color by applying a colorimeter to the surface of the shell of the labeled shellfish and the natural shellfish. It is shown by the numerical value by the chromaticity diagram of and the saturation, and based on this numerical value,
In particular, when artificial pigments are detected from the high brightness, the computer sorts the labeled shellfish and natural shellfish, and simultaneously measures the shell length and weight of the caught shellfish using an automatic shell length and weight measurement device. The results of this measurement are stored in an automatic storage device and analyzed by the computer to collect and arrange the data obtained from the labeled shellfish, and the growth, ecology, behavior, living environment conditions, etc. of shellfish living in natural waters A method for investigating the ecology of shellfish using labeled shellfish, characterized by obtaining the following materials.