JP2011115081A - Apparatus for protecting fish egg and fry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for protecting fish eggs and fries, which inherits merits of a conventional apparatus for protecting fish eggs and fries and, on the whole, easily and safely protects fish eggs and fries in a fresh water environment. <P>SOLUTION: The apparatus for protecting fish eggs and fries includes an egg laying box 1, a protection enclosure 2 for protecting fish eggs and fries, which the egg laying box 1 is inserted into and attached to, and a mounting tool 3 for attaching a protection apparatus to a water tank 100. The egg laying box 1 has water permeable holes and a fish egg passage hole to the protection enclosure 2. The protection enclosure 2 includes a water-permeable peripheral wall essentially consisting of a net 24 for preventing fry passage and a bottom plate 22 for closing the lower end part of a region enclosed by the peripheral wall. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a fish egg that protects an egg produced from a parent fish or a fry hatched from the egg so as not to become a prey of the parent fish or other fish, when the fish is ornamentally bred in an aquarium fish tank. It relates to fry protection equipment.

  As this kind of conventional egg and fry protection devices, the following two types are known.

  One is a net box type protection device in which a wall portion including a peripheral wall and a bottom wall surrounded by the peripheral wall and closing a lower end of the region is configured by a net-sized net for blocking the passage of fry and fish eggs as a whole. It is.

  The other is a spawning chamber that has a water passage hole that does not allow the passage of parent fish but allows passage of water, and does not allow passage of the parent fish, but has a hole for passage of fish eggs that passes through and drops. It is a spawning box type protective device including a box portion having a water passage hole.

  The former net box type protection device is, for example, submerged almost entirely or leaving the upper end in the aquarium fish tank, and put the parent fish that is likely to lay eggs in the submerged part to spawn and hatch. Alternatively, eggs or larvae larvae laid on the outside of the protective device are captured and put in, and these eggs and larvae are to be protected.

  The latter spawning box type protection device is, for example, submerged almost entirely or leaving the upper end in the aquarium fish tank, and captures and puts the parent fish that is likely to spawn in the spawning chamber part submerged in water, The eggs spawned therein are dropped and moved to the outer box portion surrounding the outside and hatched in the outer box portion to protect from the parent fish and other fish.

  The former net box type protective device is described as “New Spawning Net” on page 27 of the product catalog “2009 SUDO PET PRODUCTS CATALOGUE” issued by Sudo Co., Ltd. 2009 Aquarium Products Catalog, page 65, described as “spawning net”.

  The latter spawning box type protective device is described as “spawning box” on page 27 of the catalog issued by Sudo Co., Ltd., and the catalog “2009 NISSO PRODUCTS CATALOG Aquarium General Catalog” issued by Marcan Nisso Division, Inc. ”On page 78 is described as“ laying box ”.

Product catalog “2009 SUDO PET PRODUCTS CATALOGUE” issued by Sudo Co., Ltd. Catalog issued by JX Corporation “2009 Aquarium Products Catalog” Catalog published by Marcans Nisso Division “2009 NISSO PRODUCTS CATALOG Aquarium General Catalog”

  The net box type protective device has an advantage that the fluidity of water in the protective device can be kept relatively good, the water in the protective device can be kept fresh, and can be provided relatively inexpensively.

  However, when a parent fish is put into the protective device for egg laying, the egg produced and the fry hatched from it may be eaten by the parent fish. In addition, when catching eggs and hatched fry that have been laid in the water tank outside the protective device and transferring them to the protective device, the work must be carried out in accordance with the timing of spawning and hatching. If the timing is out of order, eggs and fry may be eaten by parent fish and other fish.

  Furthermore, even if eggs and fry are protected in a protective device, the net is usually easily deformed, so there is a risk that eggs and fry will be harmed by large fish from the outside of the net, In particular, there is a risk that an egg that sinks into the net portion forming the bottom of the protective device may be harmed by a large fish or the like from the outside of the net portion.

  On the other hand, in the spawning box type protection device, the parent fish is put in the spawning room and the eggs and fry are protected by the outer box, so there is no fear that the eggs or fry will be eaten by the parent fish. Further, since the outer box part is usually made of a synthetic resin plate, there is no risk that the eggs and fry in the box part will harm the large fish from the outside of the box part.

  However, since the egg-laying room and the outer box are usually made of a synthetic resin or the like, they are more expensive than a net box type protective device.

  In addition, although water passage holes are formed on the walls of the spawning chamber and the outer box, they are usually only partially formed from the viewpoint of reducing production costs and maintaining strength. Compared with the protective device of this type, the fluidity of water between the inside and outside of the protective device is poor, and compared with the net box type protective device, it is difficult to supply fresh water to the parent fish, eggs and fry.

  If the water passage hole is made large in order to solve such a problem, the fry escapes from the hole to the outside and it becomes difficult to protect the fry.

  Therefore, the present invention inherits the advantages of the conventional net box type protection device and the conventional spawning box type protection device, respectively, and as a whole, the eggs and fry can be easily and safely protected in a fresh water environment. It is an object of the present invention to provide a device for protecting fish eggs and fry that can be used.

In order to solve the above problems, the present invention
A spawning box used for spawning a parent fish, and a protective enclosure for protecting a spawn and a fry that can be inserted into the spawning box, and the spawning box does not allow the parent fish to pass but allows water to pass through. In addition to the water passage hole, the parent fish is not allowed to pass therethrough but has a fish egg passage hole for allowing the fish egg to pass through and fall to the protective enclosure. An apparatus for protecting fish eggs and fry including a water-permeable peripheral wall mainly composed of a fry fish passage-preventing net and a bottom plate that closes a lower end portion of a region surrounded by the peripheral wall.

  The apparatus for protecting fish eggs and fry according to the present invention is attached to, for example, the upper frame of an aquarium fish tank, and each of the spawning box and the outer protective enclosure is substantially entirely or a part of the upper part thereof. Use it by immersing it in aquarium water.

  In such a state where the aquarium is set in the aquarium, a parent fish that is about to lay eggs or is about to lay eggs is put in the egg laying box, and the laid eggs are dropped from the hole for egg passing through the egg laying box into the outer protective enclosure . In this way, the eggs transferred to the protective enclosure and the fry hatched therefrom are protected from the parent fish in the protective enclosure. It is also protected from other fish by a protective enclosure.

  At this time, the eggs dropped on the bottom plate of the protective enclosure and the fry collected there are protected by the bottom plate and are free from harm from the bottom of the bottom plate by large fish.

  Such protection of fish eggs and fry can be performed by storing in advance a parent fish that is about to spawn or is about to spawn, so that it is easier to protect the eggs and fry.

  In the protective device according to the present invention, water flows between the inside and outside of the protective enclosure through the mesh of the net that forms the peripheral wall of the protective enclosure. As a whole, the flow of water between the inside and outside of the protective device is possible.

  At this time, since the surrounding wall is a water-permeable peripheral wall whose main wall is a net, it is compared with the case where the number of water holes in the outer box part is limited as in a conventional spawning box type protective device. The fluidity of water between the inside and outside of the protective enclosure is good, and the eggs and fry in the protective enclosure can be placed in a fresh water environment.

  In addition, since the protective wall is a water-permeable peripheral wall whose main wall is a net, compared to the case where the outer box part is also made of synthetic resin or the like, as in a conventional spawning box type protective device, The entire protection device can be provided at a low cost.

  Moreover, since the net | network which comprises the water-permeable surrounding wall of a protective enclosure is a net | network for fry passage prevention, there is little possibility that a fry will escape to the outside from the net | network of this net | network, and will become prey of other fish.

  As described above, the device for protecting fish eggs and fry according to the present invention makes it easier and safer to protect the eggs and fry that hatch from them from the parent fish and other fish compared to the conventional net box type protection device. Compared to conventional spawning box type protection devices, it can improve the fluidity of water for fish eggs and fry, and can keep fish eggs and fry in fresh water environment, and also conventional spawning boxes Compared to the type of protection device, the fry is less likely to escape to the outside of the protection device, and as a whole, the eggs and fry can be easily and safely protected under a fresh water environment.

  As the protective enclosure in the protective device according to the present invention, for example, an upper frame on which the egg-laying box can be mounted, a bottom plate, and a column portion connecting the upper frame and the bottom plate are provided as a simple structure. The water-permeable peripheral wall includes at least the fry fish passage prevention net stretched so as to extend from the upper frame to the bottom plate.

  In order to facilitate the transfer of eggs from the egg-laying box to a protective enclosure, the egg-laying box can be exemplified by a fish egg-passing slit at the bottom of the egg-laying box as the fish egg-passing hole. Moreover, what has the said water flow hole in the egg-laying box part above the said slit for fish egg passage can be illustrated. In addition, the inner wall of the lower part of the egg-laying box may be inclined downward toward the fish egg passage slit.

  The protection device according to the present invention may include an attachment for attaching to the aquarium fish tank. Examples of such attachments include those that can be bent and deformed that rise upward from the protective enclosure so that they can be applied to water tanks of various sizes (for example, those that can be bent, such as sheet metal or wire). it can.

As described above, according to the present invention, the advantages of the conventional net box type protection device and the advantages of the conventional spawning box type protection device are inherited, respectively. It is possible to provide a protection device for fish eggs and fry that can be easily and safely protected.

It is a top view of the protection apparatus of the egg and the fry which concern on this invention. It is a front view of the protection apparatus of FIG. It is a front view of the state which removed the surrounding wall structure net | network of the protection apparatus of FIG. It is sectional drawing which follows the XX line of FIG. It is a figure which shows the usage condition example of the protection apparatus of FIG.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a protection device for fish eggs and fry according to the present invention, and FIG. 2 is a front view of the protection device of FIG. FIG. 3 is a front view of the protection device of FIG. 1 with the peripheral wall constituting net removed. 4 is a cross-sectional view taken along line XX of FIG. FIG. 5 is a diagram illustrating an example of a usage state of the protection device of FIG.

The illustrated egg and fry protecting device 10 is:
A spawning box 1 used for the spawning of the parent fish F (see FIG. 5)
A protective enclosure 2 for protecting the egg e and fry (see FIG. 5), into which the egg-laying box 1 can be inserted and mounted;
The ornamental fish tank 100 (see FIG. 5) includes a pair of attachments 3 for attaching the protective device 10 (spawning box 1 and protective enclosure 2).

  The egg-laying box 1 includes a substantially rectangular flange-shaped upper frame 11 when viewed from above, and a portion 12 that extends downward from the upper frame 11 and converges into a later-described fish egg passage hole 1a.

  On the upper frame 11, a protruding piece 111 protrudes outward from each side portion in the longitudinal direction, and a protruding piece 112 protrudes outward from each side portion in the short direction.

  These protruding pieces 111 and 112 are for inserting and mounting the egg-laying box 1 into the protective enclosure 2 as will be described later. This point will be further explained later.

  A fish egg passage hole 1a is formed at the lower end of the portion 12 extending downward from the upper frame 11 of the egg-laying box 1. The hole 1a does not allow the parent fish F to pass through, but also allows the fry fish f to pass through. Although it is difficult, the fish egg is allowed to fall into the protective enclosure 2. In this example, it is a slit-shaped hole having a width of about 2.5 mm and a length of about 48 mm that is long in the lateral direction.

  The lower peripheral wall 121 of the lower portion 12 extending from the upper frame 11 is inclined downwardly in a funnel shape to the fish egg passage hole 1a including its inner surface. As a result, the fish eggs e produced in the egg-laying box 1 gather in the hole 1a and easily fall into the protective enclosure 2 therefrom.

A plurality of water passage holes 1b are formed from the upper end of the funnel-shaped peripheral wall 121 of the portion 12 extending downward from the upper frame 11 to the upper peripheral wall 122 continuous therewith.
The water passage hole 1b does not allow passage of the parent fish F and hardly allows passage of the fry f, but permits passage of water. In this example, it is a slit-shaped hole having a width of about 1 mm and a length of about 24 mm and being long in the vertical direction.

  The protective enclosure 2 includes a rectangular upper frame 21 on which the egg-laying box 1 can be mounted, a bottom plate 22 facing the upper frame 21 from below, and pillars 23 at four corners connecting the upper frame 21 and the bottom plate 22. It is out. The protective enclosure 2 further includes a net 24 that is positioned outside the four column portions 23 and is stretched so as to extend from the upper frame 21 to the bottom plate 22.

  The net 24 is a net for preventing fry passing, and a net for preventing fry passing which is used in the above-described conventional net box type protective device can be adopted as the net.

  As shown in FIG. 1, the upper frame 21 of the protective enclosure 2 is provided with concave steps 211 and 212 for fitting and positioning the protruding pieces 111 and 112 of the upper frame 11 of the egg-laying box 1.

  The egg-laying box 1 is inserted into the space (area) surrounded by the net 24 and the bottom plate 22 of the protective enclosure 2 from the opening of the upper frame 21 of the protective enclosure 2, and the protruding pieces 111, 112 of the egg-laying box upper frame 11 correspond to each other. The protective enclosure 2 can be inserted into and attached to the protective enclosure 2 by being seated in the recessed step portions 211 and 212 of the protective enclosure upper frame 21. 1 to 5 each show a state in which the egg-laying box 1 is inserted and attached to the protective enclosure 2 as described above.

  The fixture 3 of the protective device 10 (the egg-laying box 1 and the protective enclosure 2) has a lower end fixed to one side portion in the longitudinal direction of the upper frame 21 of the protective enclosure 2 as shown in FIG. Standing up. In this example, the fixture 3 is a hook portion made of a metal plate that can be bent and deformed.

  For example, each fixture 3 is bent like a hook and hooked on the upper frame 101 of the ornamental fish tank 100 as shown in FIG. Thus, substantially the whole can be submerged in the aquarium water W, leaving the upper end, and the protection device 10 can be used in this state.

  For example, the protective device 10 is set in the aquarium 100 as shown in FIG. 5, and puts the parent fish F that is about to spawn or is about to spawn in the spawning box 1, and the spawned egg e is the fish in the spawning box 1. The egg is passed and dropped into the outer protective enclosure 2 from the egg passing hole 1a. In this way, the egg e transferred to the protective enclosure and the fry f f hatched therefrom are protected from the parent fish F in the protective enclosure 2. Further, the protective enclosure 2 protects other fish F '(see FIG. 5) and the like.

  At this time, the egg e dropped on the bottom plate 22 of the protective enclosure 2 and the fry f gathered there are protected by the bottom plate 22 and are not harmed from below by the large fish.

  Such protection of the egg e and the fry f can be performed by storing the parent fish F that is about to lay or is likely to lay in the spawning box 1 in advance, so that it is easy to protect the egg e and the fry f. It can be done.

  In addition, water flows between the inside and outside of the protective enclosure 2 through the mesh of the net 24 constituting the peripheral wall of the protective enclosure 2 of the protective device 10, and the egg-laying box 1 is connected between the inside and outside of the egg-laying box 1 through its water passage hole 1b. As a whole, the flow of water between the inside and outside of the protective device 10 is possible.

  At this time, since the peripheral wall of the protective enclosure 2 is a water-permeable peripheral wall mainly composed of the net 24, the number of water holes in the outer box portion is limited as in a conventional spawning box type protective device. Compared with, the fluidity of water between the inside and outside of the protective enclosure 2 is good, and the eggs e and fry f in the protective enclosure 2 can be placed in a fresh water environment.

  Further, since the peripheral wall of the protective enclosure 2 is a water-permeable peripheral wall mainly composed of the net 24, it is compared with the case where the outer box portion is also made of a synthetic resin or the like as in a conventional spawning box type protective device. Thus, the entire protection device 10 can be provided at a low cost.

  In addition, since the net 24 constituting the water-permeable peripheral wall of the protective enclosure 2 is a fry passing prevention net, it is suppressed that the fry f f escapes from the net of the net to the outside and becomes a prey for other fish. ing.

  In this way, the protection device 10 can easily and safely protect the fish egg e and the fry f f hatching from it, from the parent fish F and other fish F ', as compared with the conventional net box type protection device. Compared with the box type protection device, the fluidity of the water for the fish e and fry f can be improved, and the fish e and f can be placed in a fresh water environment. Compared with the protection device, the fry f is less likely to escape to the outside of the protection device 10, and as a whole, the egg e and the fry f can be easily and safely protected under a fresh water environment.

  INDUSTRIAL APPLICABILITY The present invention can be used to provide a fish egg and fry protecting device for protecting fish eggs and fry.

DESCRIPTION OF SYMBOLS 10 Egg and fry protection apparatus 1 Spawning box 11 Upper frame 111, 112 Protrusion piece 12 Portion 121 extending downward from upper frame 11 Lower peripheral wall 1a of portion 12 Fish egg passage hole 1b Water passage hole 2 Protective enclosure 21 Upper frame 211, 212 Concave step portion 22 Bottom plate 23 Pillar portion 24 Net for preventing fry passing 3 Attachment F Parent fish F 'Other fish f Fry fish e Egg 100 Aquarium for ornamental fish 101 Aquarium upper frame W Water in aquarium

Claims (5)

A spawning box used for spawning a parent fish, and a protective enclosure for protecting the spawn and fry that can be inserted and attached to the spawning box, wherein the spawning box does not allow the parent fish to pass but allows water to pass through. In addition to the water passage hole, the parent fish is not allowed to pass therethrough but has a fish egg passage hole for passing and dropping the fish egg to the protective enclosure. An apparatus for protecting fish eggs and fry, comprising a water-permeable peripheral wall mainly composed of a fry passing prevention net and a bottom plate for closing a lower end portion of a region surrounded by the peripheral wall. The protective enclosure includes an upper frame on which the spawning box can be mounted, the bottom plate, and a pillar portion that connects the upper frame and the bottom plate, and the water-permeable peripheral wall extends at least from the upper frame to the bottom plate. The apparatus for protecting fish eggs and fry according to claim 1, comprising the net for preventing passage of fry that is stretched. The egg laying box has a fish egg passage slit at the bottom as the fish egg passage hole, and the water passage hole is formed in the egg laying box portion above the fish egg passage slit. The apparatus for protecting fish eggs and fry according to claim 1 or 2, wherein an inner surface of the lower peripheral wall is inclined downward toward the fish egg passage slit. 4. The egg and fry protecting apparatus according to claim 1, 2 or 3, further comprising an attachment for attaching to the aquarium fish tank. The apparatus for protecting fish eggs and fry according to claim 4, wherein the attachment is a bending-deformable attachment that rises upward from the protective enclosure.

Images