CN205305722U

CN205305722U - Ietalurus punetaus laying nest

Info

Publication number: CN205305722U
Application number: CN201520996236.5U
Authority: CN
Inventors: 韩永望; 秦飞; 孙家贤; 陈勇; 江孝军; 刘永富; 郭富华; 张家金
Original assignee: Tongwei Co Ltd
Current assignee: Tongwei Co Ltd
Priority date: 2015-12-04
Filing date: 2015-12-04
Publication date: 2016-06-15
Anticipated expiration: 2025-12-04

Abstract

The utility model relates to an aquaculture technical field, the purpose provides an ietalurus punetaus laying nest, and this laying nest stability is good, effectively improves the volume of laying eggs of parent population. For realizing above -mentioned invention mesh, the utility model provides a: an ietalurus punetaus laying nest, includes the nest physically, vertical the arranging of the nest body, the size of nest body lower part is greater than the size on upper portion, the top of the nest body sets up exit, and the bottom sets up the net piece. Vertical the arranging of the nest body, the size of nest body lower part are greater than the size on upper portion, and the volume of laying eggs of parent population is effectively improved to laying nest stable good in the pond. Exit that the parent population was set up by the top get into the laying nest, and the nest is internal to be provided sufficient space and let its activity. The parent population lays eggs, inseminates on the net piece of laying nest bottom setting, then peels off pieces of an egg from the net piece and to carry out artificial incubation.

Description

A kind of spot fork tail laying nest

Technical field

The utility model relates to technical field of aquaculture, is specifically related to a kind of spot fork tail laying nest.

Background technology

The artificial propagation of spot fork tail has three kinds of methods: one is natural spawning, hatching in pond; Two is natural spawning insemination, artificial incubation; Three is hatching of manually hastening parturition. Wherein the first method fry hatching rate and surviving rate are low, and the third method needs gametocide fish to get sperm, and cost is higher. Therefore the most frequently used at present be the 2nd kind of method, the breeding parent population namely selecting gonad development good, carries out combo and puts into pond of laying eggs. Allow it naturally match insemination of laying eggs, collect pieces of an egg and carry out artificial incubation and obtain fry.

Spot pitches the habit that tail mature brood fish has free object to lay eggs in cave, so when adopting the 2nd kind of method, it is necessary in pond, place artificial spawning nest lure parent population fixed point to lay eggs and insemination. Current industry generally adopts milk vat, wooden barrel, wooden case etc., its size with hold one to parent population voluntarily activity be advisable. Bucket one end is parent population import and export, and the other end is bottomless and uses 40 order polythene net cloth to cover with, to prevent leakage ovum. Laying nest parent population is imported and exported towards pond central authorities, and milter is by after entering laying nest and removing inside foul, raun enters laying nest and within it lays eggs on wall. The milter in process that lays eggs produces sperm and is inseminated by ovum raun. The activity in laying nest of male and female parent population may cause laying nest to roll at the bottom of pond, thus causes parent population frightened and stops laying eggs.

Summary of the invention

The purpose of this utility model is to provide a kind of spot fork tail laying nest, and this laying nest good stability, effectively improves the egg laying amount of parent population.

For achieving the above object, the technical scheme that the utility model adopts is: a kind of spot fork tail laying nest, comprises nest body, and described nest body is vertically arranged, the size of nest body bottom is greater than the size on top; The top of described nest body arranges import and export, and bottom arranges mesh sheet.

Preferred: described nest body is placed on support.

Preferred: described nest body is the closing in ampuliform of smooth surface transition.

Preferred: to arrange cord on described nest body, the other end of cord connects float.

Preferred: described dried up 0.5-0.8m in nest body upper end.

The utility model has following useful effect: nest body is vertically arranged, the size of nest body bottom is greater than the size on top, the good stability of laying nest in pond. When male and female parent population is movable in laying nest, laying nest held stationary. Avoiding rolls at the bottom of pond because of laying nest causes parent population frightened and stops situation about laying eggs, and effectively improves the egg laying amount of parent population. The import and export that parent population is arranged by top enter laying nest, provide enough spaces to make it movable in nest body. The mesh sheet that parent population is arranged in laying nest bottom is laid eggs, inseminates, then pieces of an egg are peeled off mesh sheet and can carry out artificial incubation.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation bottom laying nest;

Fig. 3 is the structural representation of support;

Fig. 4 is the placement schematic diagram of laying nest and support.

Embodiment

As shown in Figure 1, 2, a kind of spot fork tail laying nest, comprises nest body 1, and described nest body 1 is vertically arranged, the size of nest body 1 bottom is greater than the size on top, the good stability of laying nest in pond. When male and female parent population is movable in laying nest, laying nest held stationary. Avoiding rolls at the bottom of pond because of laying nest causes parent population frightened and stops situation about laying eggs, and effectively improves the egg laying amount of parent population.

The top of described nest body 1 arranges import and export 2. As shown in Figure 2, the bottom of nest body 1 arranges mesh sheet 3, and mesh sheet 3 selects 40 object polyethylene mesh sheet. Pitch shape and the size of tail according to spot, the concrete size of laying nest is it may be that import and export 2 diameter on top is 20cm, and mesh sheet 3 diameter that bottom is arranged is 50cm, and nest body 1 height is 50cm. The import and export 2 that parent population is arranged by top enter nest body 1, provide enough spaces to make it movable in nest body 1. The mesh sheet 3 that parent population is arranged in laying nest bottom is laid eggs, inseminates, then pieces of an egg are peeled off mesh sheet 3 and can carry out artificial incubation.

The mesh sheet 3 arranged due to bottom is subject to sediment pollution, and raun does not enter laying nest and lays eggs; Or after laying eggs, affecting by bed mud, dead ovum is more. Described nest body 1 can directly be placed in pond, regularly pond bottom is cleared up, and avoids raun not enter laying nest or dead ovum. Platform or support 6 can also be set at the bottom of pond, for placing nest body 1, it is ensured that mesh sheet 3 does not contact with bed mud. The pond that bottom exists bed mud can be adapted to very well, for the requirement of pond condition when reducing artificial propagation spot fork tail. Preferably, as shown in Figure 3,4, described nest body 1 is placed on the frame 6, and support 6 can strengthen the stability of laying nest further. Support 6 can be welded by the zinc-plated angle steel that 3cm is wide, and for ease of the placement of laying nest, whole support is of a size of long 6m, wide 45cm, high 30cm; The good intensity height of zinc-plated angle steel preservative property.

Preferably as shown in Figure 4, described nest body 1 is the closing in ampuliform of smooth surface transition. The space in nest body 1 can be increased like this, ensure that parent population can be freely movable. And when current agitate, the stability of the groove that also can ensure preferably to lay eggs. Arranging cord 4 on described nest body 1, the other end of cord 4 connects float 5. Float 5 swims in the water surface above laying nest, can determine the position of laying nest, and picks and places conveniently. In addition the distance of the laying nest distance water surface can not exceed cord 4 length.Therefore by the adjustment of cord 4 length, the distance scope between laying nest and the water surface can be determined. Described dried up 0.5-0.8m in nest body 1 upper end, this depth of water scope is spot fork tail scope of activity, ensures the utilization ratio of laying nest.

Claims

1. a spot fork tail laying nest, comprises nest body (1), it is characterised in that: described nest body (1) is vertically arranged, the size of nest body (1) bottom is greater than the size on top; The top of described nest body (1) arranges import and export (2), and bottom arranges mesh sheet (3).

2. a kind of spot fork tail laying nest according to claim 1, it is characterised in that: described nest body (1) is placed on support (6).

3. a kind of spot fork tail laying nest according to claim 1, it is characterised in that: the closing in ampuliform of described nest body (1) in smooth surface transition.

4. a kind of spot fork tail laying nest according to claim 1, it is characterised in that: arranging cord (4) on described nest body (1), the other end of cord (4) connects float (5).

5. a kind of spot fork tail laying nest according to claim 4, it is characterised in that: described nest body (1) dried up of upper end 0.5-0.8m.