CN215380838U

CN215380838U - In-vitro hatching device for fertilized eggs of red crayfish

Info

Publication number: CN215380838U
Application number: CN202121268984.3U
Authority: CN
Inventors: 李色东; 陈奕彬; 胡一丞; 乔高明
Original assignee: Guangdong Evergreen Feed Industrial Co ltd
Current assignee: Guangdong Evergreen Feed Industrial Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-01-04
Anticipated expiration: 2031-06-08

Abstract

The utility model provides an in-vitro hatching device for fertilized eggs of red crayfish. The hatching apparatus comprises: the hatching cup comprises a hatching liquid tank, a hatching cup frame, a circulating water system and a hatching cup, wherein the hatching liquid tank is connected with the hatching cup frame in a sliding manner; the bottom of the hatching liquid tank is connected with a circulating water system; an incubation cup is arranged on the incubation cup holder; gaps are uniformly arranged on the hatching cup. The hatching device can realize independent cultivation and constant-temperature hatching; by swinging the hatching cup holder, the fertilized eggs can fully float in the hatching cup, and sufficient dissolved oxygen is ensured in the hatching process; the cooperation of the circulating water system enables the hatching fluid in the hatching fluid tank to be filtered circularly and has the functions of sterilization and disinfection; the utility model realizes the controllable and large-scale in-vitro hatching of the fertilized eggs of the red crayfish.

Description

In-vitro hatching device for fertilized eggs of red crayfish

Technical Field

The utility model belongs to the technical field of aquaculture equipment, and particularly relates to an in-vitro hatching device for fertilized eggs of red crayfish.

Background

The red crayfish (Cheraxquadrica rinatus) is originally produced in Australia, is one of the famous and precious freshwater economic crayfish in the world, and is similar to crayfish in the sea in appearance and is commonly called Australia freshwater crayfish in China. Mating and hatching fertilized eggs, the water temperature is generally 22-30 ℃, the optimal water temperature is 24-28 ℃, and the fertilized eggs are hatched for about 35-42 days to produce 0.5-0.8cm (body length) of young shrimps.

At present, fertilized eggs are mainly carried by parents to be naturally hatched on appendages. First, after the mating of male and female shrimps, the fertilization is completed within 24 hours, and the fertilized eggs are carried by the parents to be naturally hatched. In the production process, the egg-carrying shrimps need to be singly incubated and managed, and at present, two operation methods are mainly adopted: (1) taking out the ovigerous shrimps with fertilized eggs in different development stages, and centralizing the ovigerous shrimps in an incubation pool for management, wherein ovigerous shrimp inhabitants and shrimp fry inhabitants are required to be arranged in the incubation pool for the ovigerous shrimps to hide and the hatched shrimp fries to hide. After the fertilized eggs are hatched, shrimp fries need to be collected every day and are put into a culture pond for individual culture. (2) And (3) carrying out separated concentration and management on the fished egg-carrying shrimps according to different development stages of fertilized eggs, arranging inhabitants in the hatching pond for the egg-carrying shrimps to hide, moving all the egg-carrying shrimps out of the hatching pond after hatching of the fertilized eggs, and taking the hatching pond as a shrimp fry breeding pond.

The above two methods of operation have the following problems: (1) the egg-carrying shrimps are managed independently, so that the required space, labor and production cost are increased; (2) the incubation period of the fertilized eggs is long, the maternal burden is large, the incubation is greatly influenced by natural environmental factors, and the phenomena of egg drop, dead eggs, mildewed eggs and the like often exist; (3) the egg laying period is long, secondary egg laying of the female shrimps is restricted, and the production efficiency is influenced; (4) if the hatched shrimp larvae are collected untimely, the shrimp larvae are killed by the shrimps, the self-killing degree among the shrimp larvae is aggravated, and the survival rate is reduced. These problems all seriously restrict the scale production and industrial scale of the juvenile crayfish of the red swamp crayfish.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problem that the existing hatching system and method restrict the development of industry, and provides a three-dimensional hatching device for fertilized eggs of red crayfish. The problems of large workload, high cost, more space requirement, uncontrollable and difficult scale production of the natural hatching method provided by the background art are solved.

In order to realize the purpose of the utility model, the technical proposal of the utility model is as follows:

the utility model provides an in-vitro hatching device for fertilized eggs of red crayfish, which comprises a hatching liquid tank, a hatching cup holder, a circulating water system and a hatching cup, wherein the hatching liquid tank is connected with the hatching cup holder in a sliding way; the bottom of the hatching liquid tank is connected with a circulating water system; an incubation cup is arranged on the incubation cup holder; gaps are uniformly arranged on the hatching cup.

Furthermore, a bracket is fixed at the bottom of the hatching liquid tank.

Further, the size of the gap of the hatching cup can allow water to pass through, and fertilized eggs cannot pass through.

Furthermore, one end of the hatching cup holder is connected with a variable frequency motor through a bearing, and the variable frequency motor is connected with a frequency modulation controller; variable frequency motor can drive the swing of hatching glass stand.

Furthermore, the two ends of the bottom of the hatching liquid tank are respectively provided with a water outlet and a water inlet with the same number, the water outlet and the water inlet are respectively connected with a water outlet pipe and a water inlet pipe, and the water outlet pipe and the water inlet pipe are connected with a circulating water system.

Furthermore, a filtering cotton core is paved at the bottom of the circulating water system; the water outlet pipe penetrates through the filtering cotton core; the water inlet pipe is connected to the middle upper part of the circulating water system.

Furthermore, a water suction pump is arranged at the position, close to the circulating water system, of the water outlet pipe.

Further, an ultraviolet lamp is fixed on the inner wall of the circulating water system.

Furthermore, a temperature controller is arranged on the inner wall of the bottom of one side of the hatching liquid tank.

Furthermore, the hatching liquid tank is connected with the hatching cup holder through pulleys on two sides of the hatching cup holder.

Compared with the prior art, the utility model has the advantages and beneficial effects that:

the utility model provides an in-vitro hatching device for fertilized eggs of red crayfish, which mainly comprises a hatching liquid tank, wherein a transverse bracket is welded at the upper end of the hatching liquid tank and is used for fixing a hatching cup for accommodating the fertilized eggs, the hatching cup is provided with uniform gaps and is permeable to water, but the fertilized eggs cannot leak out; the hatching liquid tank is connected with a variable frequency motor and is used for driving the hatching tank to swing; the lower end of the hatching liquid tank is provided with a water inlet and a water outlet which are used for installing a circulating water system; and an ultraviolet lamp is arranged in the circulating water system and is used for sterilizing and disinfecting hatching water. The hatching device can realize independent cultivation and constant-temperature hatching; by swinging the hatching cup holder, the fertilized eggs can fully float in the hatching cup, and sufficient dissolved oxygen is ensured in the hatching process; the cooperation of the circulating water system enables the hatching fluid in the hatching fluid tank to be filtered circularly and has the functions of sterilization and disinfection; the utility model realizes the controllable and large-scale in-vitro hatching of the fertilized eggs of the red crayfish.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an in vitro hatching device for fertilized eggs of red crayfish of the present invention;

FIG. 2 is a schematic diagram of a circulating water system of an in vitro hatching device for fertilized eggs of red crayfish of the present invention;

FIG. 3 is a schematic view of a single hatching cup of the in vitro hatching device for fertilized eggs of red crayfish of the present invention;

reference numbers in the figures: 1. an incubation liquid tank; 2. an incubation cup holder; 3. a frequency modulation controller; 4. a variable frequency motor; 5. a bearing; 6. a water outlet pipe; 7. a water inlet pipe; 8. a circulating water system; 9. a water pump; 10. filtering the cotton core; 11. an ultraviolet lamp; 12. a temperature controller; 13. an incubation cup.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1

The hatching device is structurally shown in figures 1-3, and is placed in a room with 500 and 1000Lux adjustable illumination. The hatching cup comprises a hatching liquid tank 1, a hatching cup frame 2, a circulating water system 8 and a hatching cup 13, wherein the hatching liquid tank 1 is connected with the hatching cup frame 2 through pulleys on the front side and the rear side of the hatching cup frame 2; the bottom of the hatching liquid tank 1 is connected with a circulating water system 8; an incubation cup 13 is arranged on the incubation cup holder 2; gaps are uniformly arranged on the hatching cup 13. The hatching fluid tank 1 is used for containing hatching culture solution, the hatching culture solution adopts fresh water with qualified water quality, and is filtered, sterilized and disinfected by a circulating water system 8 for at least 24 hours before fertilized eggs are placed, and the water quantity of the culture solution is preferably to submerge the bottom of the hatching cup 13 to soak the fertilized eggs.

The size of the gap of the incubation cup 13 is such that water can pass through the gap and fertilized eggs cannot pass through the gap. The hatching cup 13 is a hatching place for fertilized eggs, and the arrangement of the gap can ensure that the liquid in the hatching cup 13 and the hatching fluid tank 1 are in the same water circulation system.

Transverse frames are fixed between the left end and the right end of the hatching fluid bath 1, and a plurality of hatching cups 13 for containing fertilized eggs can be positioned and clamped between the transverse frames. The number of the cross frames is determined according to the width of the hatching fluid groove 1 vertical to the direction of the cross frames. The opening end of the hatching cup 13 is wide, the four peripheral surfaces are planes, the bottom of the hatching cup is arc-shaped, and gaps on the hatching cup 13 are arranged on two side surfaces along the water flow direction. The shape of the hatching cup 13 with wide top and narrow bottom can lead the hatching cup 13 to be clamped on the cross frame.

The middle part of the left end of the hatching cup holder 2 is connected with a variable frequency motor 4 through a bearing 5, and the variable frequency motor 4 is connected with a frequency modulation controller 4. The variable frequency motor 4 can drive the hatching cup holder 2 to swing; the swinging frequency can be regulated and controlled by the frequency modulation controller 4, so that the fertilized eggs can fully float in the hatching cup 13, and sufficient dissolved oxygen is ensured in the hatching process.

The left end of the bottom of the hatching liquid tank 1 is provided with three water outlets, the right end of the bottom of the hatching liquid tank is provided with three water inlets, and the water outlets and the water inlets are respectively connected with a water outlet pipe 6 and a water inlet pipe 7; three layers of filtering cotton cores 10 are paved at the bottom of the circulating water system 8; the water outlet pipe 6 penetrates through the filtering cotton core 10, and the water inlet pipe 7 is connected to the middle upper part of the circulating water system 8. And a water suction pump 9 is arranged at the position, close to the circulating water system 8, of the water outlet pipe 6. And an ultraviolet lamp 11 is fixed on the inner wall of the circulating water system 8. The number of (1-3) circulating water systems 8 can be increased or decreased in parallel according to the required circulating water quantity. The circulating water system 8 is provided with a water pump 9, water pumped from the hatching fluid tank is filtered by a cotton filter element 10 and is sterilized and disinfected by an internal ultraviolet lamp 11 and then flows back to the hatching fluid tank 1, particulate matters in the hatching fluid are removed, the cleanness and the sterility of the hatching fluid are guaranteed, and the hatching success rate and the survival rate of fertilized eggs are guaranteed.

A temperature controller 12 is arranged on the inner wall of the bottom of the right side of the hatching liquid tank 1; the power of the temperature controller 12 is 300w, and the temperature controller is used for controlling and keeping the water temperature in the incubation liquid tank 1 constant, so that a proper and stable water temperature environment is provided for incubation of fertilized eggs, and embryo development is guaranteed. The hatching fluid bath 1 is rectangular, and four corners of the bottom are fixed with brackets. Used for supporting and placing the hatching device.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The utility model provides a red chela shrimp embryonated egg isolated hatching apparatus which characterized in that: the hatching cup comprises a hatching liquid tank, a hatching cup frame, a circulating water system and a hatching cup, wherein the hatching liquid tank is connected with the hatching cup frame in a sliding manner; the bottom of the hatching liquid tank is connected with a circulating water system; an incubation cup is arranged on the incubation cup holder; gaps are uniformly arranged on the hatching cup.

2. The isolated hatching apparatus for fertilized eggs of red crayfish according to claim 1, wherein a rack is fixed to the bottom of said hatching fluid tank.

3. The isolated hatching apparatus for fertilized eggs of red crayfish according to claim 1, wherein the size of the gap of said hatching cup is such that water can pass through the gap and fertilized eggs cannot pass through the gap.

4. The isolated hatching device for the fertilized eggs of the red crayfish according to claim 1, wherein one end of the hatching cup holder is connected with a variable frequency motor through a bearing, and the variable frequency motor is connected with a frequency modulation controller; variable frequency motor can drive the swing of hatching glass stand.

5. The isolated hatching device for the fertilized eggs of the red crayfish according to claim 1, wherein the hatching liquid tank is provided with water outlets and water inlets at the two ends of the bottom thereof, the water outlets and the water inlets are respectively connected with a water outlet pipe and a water inlet pipe, and the water outlet pipe and the water inlet pipe are respectively connected with a circulating water system.

6. The isolated hatching device for the fertilized eggs of the red crayfish according to claim 5, wherein a filtering cotton core is laid at the bottom of the circulating water system; the water outlet pipe penetrates through the filtering cotton core; the water inlet pipe is connected to the middle upper part of the circulating water system.

7. The isolated hatching device for fertilized eggs of red crayfish according to claim 5, wherein a water pump is provided at a position of said water outlet pipe adjacent to said circulating water system.

8. The isolated hatching apparatus for fertilized eggs of red crayfish according to claim 1, wherein an ultraviolet lamp is fixed to an inner wall of said circulating water system.

9. The isolated hatching apparatus for fertilized eggs of red crayfish according to claim 1, wherein a temperature controller is provided on the inner wall of the bottom of one side of the hatching fluid tank.

10. The isolated hatching device for fertilized eggs of red crayfish according to claim 1, wherein the hatching fluid bath is connected to the hatching cup holder through pulleys on both sides of the hatching cup holder.