CN215346501U - Dedicated embryonated egg hatching groove of artificial breeding of trachidermus fasciatus - Google Patents
Dedicated embryonated egg hatching groove of artificial breeding of trachidermus fasciatus Download PDFInfo
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- CN215346501U CN215346501U CN202121400897.9U CN202121400897U CN215346501U CN 215346501 U CN215346501 U CN 215346501U CN 202121400897 U CN202121400897 U CN 202121400897U CN 215346501 U CN215346501 U CN 215346501U
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Abstract
The utility model relates to the field of artificial breeding of trachidermus fasciatus, in particular to a special fertilized egg hatching tank for artificial breeding of trachidermus fasciatus. The hatching tank is an integrated glass fiber reinforced plastic container with an upper cylindrical tank body and a lower conical tank body, the bottom of the conical tank body faces upwards and is superposed with the bottom of the cylindrical tank body, and a horizontal egg mass supporting net is fixed along the inner side of the joint of the cylindrical tank body and the conical tank body of the hatching tank; the water inlet pipe of the hatching tank is L-shaped and adopts an integrated structure of combining a horizontal pipe and a vertical pipe; the lower end of the vertical pipe extends into the conical groove body, the water outlet at the lower end of the vertical pipe is positioned in the center of the bottom in the incubation groove, one end of the horizontal pipe is a water inlet, and the upper part of the side surface of the incubation groove is provided with a water outlet and a seedling collecting opening, wherein the diameter of the water outlet is circular. The method can meet the requirement of the oosperm mass on water quality in artificial breeding of Trachidermus fasciatus, improve the hatching efficiency, reduce the consumption of egg yolk by the newly hatched fries, improve the survival rate and reduce the manual operation.
Description
Technical Field
The utility model relates to the field of artificial breeding of trachidermus fasciatus, in particular to a special fertilized egg hatching tank for artificial breeding of trachidermus fasciatus.
Background
Trachidermus fasciatus Heckel is commonly called four gill perch, wife fish and flower drum fish, belongs to Sebastes order (Scorpaeniformes), father family (Cottidae), Trachidermus fasciatus (Trachidermus), is offshore migratory fish, and can live in salty or pure fresh water. The trachidermus fasciatus is widely distributed, is common fishes along the banks of Bohai sea, yellow sea and east sea and adjacent fresh water areas in China, is praised as one of four famous fishes in China due to delicious meat and various physique. In recent years, the environmental damage and the fishing of the trachidermus fasciatus lead the species to be sharply reduced in the distribution area of China and endanger extinction, a certain population is also in the valley of the Duck-green river, but the number of the species is gradually reduced, and the species is listed as a national secondary protection animal at present.
The breeding characteristics of the trachidermus fasciatus are different, most of the cultured fishes have different breeding characteristics, and the artificial breeding of the trachidermus fasciatus mostly adopts the mode of laying clam shells at the bottom of a pond to collect fertilized eggs and carrying out incubation on the fertilized eggs by using still water to oxygenate for incubation. The above operation has the following disadvantages: (1) fertilized egg masses are attached to the clam shells, and the dissolved oxygen of the fertilized eggs close to the clam shell parts is low, so that the hatching effect is poor; (2) the exchange amount of the still water oxygenated incubation water body is small, and the number of incubated fertilized eggs in unit area is small; (3) hatching fertilized eggs of Trachidermus fasciatus in batches, frequently changing water, pouring the pond, and harvesting seedlings, wherein the fertilized eggs have large damage to the newly hatched fries; (4) fertilized eggs are incubated in batches, the newly-incubated larval fish stays in an incubation pool for a long time and floats violently under the influence of inflation, the consumption of nutrition in yolk is increased, and the survival rate is reduced; (5) the labor input is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fertilized egg hatching tank special for artificial breeding of Trachidermus fasciatus, and solves the problems that in the conventional artificial breeding of Trachidermus fasciatus, fertilized eggs are collected by freshwater mussel shells and incubated by oxygenating still water, the incubation efficiency is low, the labor cost is high and the like.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a special fertilized egg incubation tank for artificial breeding of Trachidermus fasciatus is an integrated glass fiber reinforced plastic container with an upper cylindrical tank body and a lower conical tank body, wherein the bottom of the conical tank body faces upwards and is superposed with the bottom of the cylindrical tank body, and a horizontal egg block supporting net is fixed along the inner side of the joint of the cylindrical tank body and the conical tank body of the incubation tank;
the water inlet pipe of the hatching tank is L-shaped and adopts an integrated structure of combining a horizontal pipe and a vertical pipe; the lower end of the vertical pipe extends into the conical groove body, the water outlet at the lower end of the vertical pipe is positioned in the center of the bottom in the incubation groove, one end of the horizontal pipe is a water inlet, and the upper part of the outer side surface of the incubation groove is provided with a water outlet and a seedling collecting port, wherein the diameter of the water outlet is circular.
The special fertilized egg hatching tank for artificial breeding of Trachidermus fasciatus is characterized in that the size of an upper cylindrical tank body is as follows: the diameter is 60 ~ 80cm, high 15 ~ 25cm, and conical groove body size in lower part is: the diameter is 60-80 ccm, and the height is 5-15 cm.
The special fertilized egg hatching tank for artificial breeding of Trachidermus fasciatus is characterized in that the egg block supporting net is a bolting silk net, and the mesh size of the egg block supporting net is 10-20 meshes.
The special fertilized egg hatching tank for artificial propagation of Trachidermus fasciatus is characterized in that a flow control valve is installed on a horizontal pipe.
The special fertilized egg incubation tank for artificial breeding of Trachidermus fasciatus is characterized in that a circular water outlet and a seedling collecting port with the diameter of 2-4 cm are arranged 4-6 cm away from the top of the outer side face of the incubation tank, the water outlet and the seedling collecting port extend 3-8 cm outside a cylindrical tank of the incubation tank, and a hose is externally connected to the water surface of the culture pond.
The special fertilized egg hatching tank for artificial breeding of Trachidermus fasciatus is positioned beside a fry breeding pool, a water outlet and a fry collecting port correspond to the fry breeding pool, and fries directly enter the fry breeding pool along with water flow after being hatched.
The special fertilized egg hatching tank for artificial breeding of Trachidermus fasciatus is characterized in that the bottom of the hatching tank is supported by a hatching tank bracket.
The method for hatching the fertilized eggs in the artificial breeding of the trachidermus fasciatus has the following advantages and beneficial effects:
1. when the method is applied to hatching the fertilized eggs in the artificial breeding of the trachidermus fasciatus, the method is obviously superior to the prior effects of collecting the fertilized eggs from the freshwater mussel shell, the oyster shell, the plate and the like and inflating and hatching the fertilized eggs in still water.
2. The method is applied to hatching the fertilized eggs in the artificial breeding of the trachidermus fasciatus, and the hatching mode of taking the fertilized egg blocks down and hatching in running water is adopted, so that the hatching efficiency is greatly improved.
3. The utility model uses the incubation groove to incubate the fertilized egg mass, the incubation groove has small volume and strong flexibility, and the use is more convenient.
4. The design of the fry collecting port of the utility model ensures that the newly hatched fries can enter the culture pond along with water flow after being hatched, thereby reducing the retention time of the newly hatched fries in the hatching tank, reducing the consumption of yolk nutrition and improving the survival rate of the fries.
5. The egg block supporting net is arranged, so that the phenomenon of oxygen deficiency caused by aggregation of egg blocks at the center of the bottom under the influence of water flow is avoided.
In a word, the incubation tank is designed and customized according to the characteristics of fertilized eggs of Trachidermus fasciatus, adopts glass fiber reinforced plastic as a main material, water enters the center of the bottom of the incubation tank, and the rising water flow formed by adjusting the water inflow enables egg masses to be always in a suspended state; a fixed bolting silk net is arranged at the bottom of the incubation groove, so that egg masses can be prevented from falling to the bottom along with water flow, and the aggregation hypoxia can be generated to influence the survival rate; the upper part of the hatching tank is provided with a water outlet (a fry collecting port), and the hatched fries directly enter a fry cultivating pool along with water flow, so that the time for the fries with earlier broken membranes to float up and down along with the water flow in the hatching tank is reduced, the consumption of nutrients in the yolk is reduced, and the fries are prevented from being damaged; the whole hatching tank is provided with an automatic water feeding and discharging system, so that the hatching efficiency can be effectively improved.
Drawings
FIG. 1 is a side view of a fertilized egg hatching tank dedicated for artificial breeding of Trachidermus fasciatus. In the figure, 1, a water inlet, 2, a water inlet pipe, 3, a water outlet and a seedling collecting port, 4, an incubation groove, 5, an egg mass supporting net, 6, an incubation groove bracket, 7 and a flow control valve.
Detailed Description
The present invention will be explained in further detail below by way of examples and figures.
In this embodiment, the artificial breeding and fry rearing method of Trachidermus fasciatus comprises the following steps
(1) Parent fish rearing
Collecting parent fish with ground cage in overwintering pond, soaking in 10mg/L potassium permanganate for 2min, culturing male and female fish in culture pond with stocking density of 20 tail/m2The salinity of the culture pond is 20 wt%. Feeding live shrimps of 3-5 cm for 4 times every day, wherein the daily feeding amount is 10% of the weight of the parent fish. The bottom of the pond is cleaned once a day, and dead parent fishes and dead shrimps are picked out.
(2) Artificial hasten parturition
The oxytocin is chorionic gonadotropin (HCG), luteinizing hormone releasing hormone analogue No. 2 (LHRH-A2), and the dosage of HCG used singly is 2000-3000 IU/kg; the single use amount of LHRH-A is 10-20 mug/kg; the dosage of the HCG and the LHRH-A2 is 1000-1500 IU/kg of HCG and 25-10 mug/kg of LHRH-A. The dosage of the male fish is reduced by half, the amount of the injection liquid is 0.5-1 ml per 100g of fish body, and one injection in the thoracic cavity is adopted. The effect time of the medicine is 18-24 h.
(3) Spawning and fertilized egg collection
Select 10m2The spawning pond is provided with spawning collectors at the bottom of the pond uniformly, and the density of the spawning collectors is 8-10/m2. The depth of water in the pond is 40cm, and immersible pumps are arranged at four corners of the spawning pond to ensure the water body in the pond to flow and perform shading treatment. The chasing phenomenon starts to occur 12 hours after parent fishes enter the pond, spawning and fertilization are completed in the egg taking device after 18 hours, and an egg block attached to one egg taking device contains 5000-10000 fertilized eggs. In order to avoid the parent fish being disturbed during the spawning period of the parent fish, all production activities are stopped in the workshop.
(4) Hatching of egg mass
As shown in fig. 1, the trachidermus fasciatus hatching tank of the present invention mainly comprises: the water inlet 1, the water inlet pipe 2, the water outlet, the seedling collecting port 3, the incubation groove 4, the egg block supporting net 5 and the incubation groove bracket 6 have the following specific structure:
the hatching tank 4 is an integrated glass fiber reinforced plastic container with an upper cylindrical tank body and a lower conical tank body, the bottom of the conical tank body faces upwards and is superposed with the bottom of the cylindrical tank body, and the size of the upper cylindrical tank body is as follows: the diameter is 90cm, the height is 20cm, and the size of the lower conical groove body is as follows: the diameter is 70cm, the height is 10cm, and the bottom of the hatching tank 4 is supported by a hatching tank bracket 6 to maintain stability. A horizontal egg block supporting net 5 is fixed along the inner side of the joint of the cylindrical tank body and the conical tank body of the incubation tank, the egg block supporting net 5 is a bolting silk net, the mesh size of the bolting silk net is 10-20 meshes, and the egg blocks are prevented from sinking to the bottom of the incubation tank to generate gathering oxygen deficiency.
The water inlet pipe 2 of the incubation groove 4 is L-shaped, an integrated structure of a horizontal pipe and a vertical pipe is adopted, the lower end of the vertical pipe extends into the conical groove, the water outlet at the lower end of the vertical pipe is positioned at the center of the bottom in the incubation groove 4, and the oosperm block of the trachidermus fasciatus is always in a suspension state by utilizing ascending water flow. One end of the horizontal pipe is a water inlet 1, a flow control valve 7 is arranged on the horizontal pipe, and the water inlet amount can be adjusted through the flow control valve 7, so that the oosperm block of the trachidermus fasciatus is always in a suspension state.
A circular water outlet and a seedling receiving port 3 with the diameter of 3cm are arranged 5cm away from the top of the side surface of the incubation groove 4, the water outlet and the seedling receiving port 3 extend 5cm outside the cylindrical groove body of the incubation groove 4, and the water outlet and the seedling receiving port 3 are used for being externally connected with a hose to the water surface of the cultivation pool. The water outlet and the fry collecting port 3 are used as a water outlet and a fry collecting port, the incubation groove 4 is positioned beside the fry rearing pond, the fries after being incubated directly enter the fry rearing pond along with water flow, the time of the fries with earlier broken membranes floating up and down along with the water flow in the incubation groove is reduced, the consumption of nutrients in egg yolk is reduced, the fry damage is avoided, the consumption of egg yolk sacs of the fries is reduced, the damage to the fries caused by manual operation is reduced, and the fry survival rate is improved.
Carefully taking the egg blocks off the egg collector, soaking and washing the egg blocks for 5-10 min by using 10-15 mg/L potassium permanganate aqueous solution or 50ppm formaldehyde for 5-10 min, then placing the egg blocks into a hatching tank for hatching, and shading. 15-20 egg blocks are placed in each hatching tank, the hatching water temperature is controlled to be 8-10 ℃, and the hatching time is 24-26 days (d). The incubation tank keeps running water, and requires fresh water quality, no pollution, sufficient dissolved oxygen, pH 7-8 and salinity of 20.
(5) Culture of newly hatched fish
The hatching tank is arranged at the side of the culture pond, and the fish fry directly enters the fish fry culture pond from the water outlet after the film of the fish fry is broken. Putting the fish fries with the same membrane breaking time into the same culture pond, wherein the stocking density is 1 ten thousand tails/m2The salinity of the incubation tank is the same as that of the culture pond, and the temperature difference of water is not more than 1 ℃. And (3) breaking the membranes for 3-5 days, taking seawater rotifers and fairy shrimp larvae as initial baits, taking fairy shrimp as a main bait after 10 days, and feeding fresh water cladocera and compound feed after 30 days. Feeding three times a day, wherein the feeding amount is 4-6% of the weight of the fish. When the body length of the fry reaches 1.5cm, desalting, and finally reducing the salinity to 1.
(6) Culturing and domesticating large-scale seedlings
When the fish fry body length reaches 2.5cm and the salinity is reduced to 1, putting the fish fry into an indoor cement pond for cultivation, wherein the stocking density is 1000 tails/m2And (4) properly separating the fish bodies into ponds along with the weight increase of the fish bodies. The bottom suction and the water change are carried out once every day, and the water change amount is 20 vol%. Feeding bait three times a day, wherein the feeding amount is 5% of the weight of the fish, and the fish fry is adaptive to the environmentThen, the compound feed is gradually mixed into the bait fed every day, and the quantity of the fresh and live baits is gradually reduced, and finally, the baits are completely converted into the artificial compound feed.
The result shows that the utility model provides a brand-new fertilized egg hatching tank special for artificial breeding of Trachidermus fasciatus, which can meet the requirement of fertilized egg masses on water quality in the artificial breeding of Trachidermus fasciatus, improve the hatching efficiency, reduce the egg yolk consumption of the newly hatched fries, improve the survival rate and reduce the manual operation. Meanwhile, the hatching can be always kept in running water, the aggregation of egg masses is avoided, the space is saved, and the seedling emergence amount per unit volume is improved.
Claims (7)
1. A special fertilized egg incubation tank for artificial breeding of Trachidermus fasciatus is characterized in that the incubation tank is an integrated glass fiber reinforced plastic container with an upper cylindrical tank body and a lower conical tank body, the bottom of the conical tank body faces upwards and is superposed with the bottom of the cylindrical tank body, and a horizontal egg block supporting net is fixed along the inner side of the joint of the cylindrical tank body and the conical tank body of the incubation tank;
the water inlet pipe of the hatching tank is L-shaped and adopts an integrated structure of combining a horizontal pipe and a vertical pipe; the lower end of the vertical pipe extends into the conical groove body, the water outlet at the lower end of the vertical pipe is positioned in the center of the bottom in the incubation groove, one end of the horizontal pipe is a water inlet, and the upper part of the outer side surface of the incubation groove is provided with a water outlet and a seedling collecting port, wherein the diameter of the water outlet is circular.
2. The special fertilized egg hatching tank for artificial propagation of trachidermus fasciatus as claimed in claim 1, wherein the size of the upper cylindrical tank body is as follows: the diameter is 60 ~ 80cm, high 15 ~ 25cm, and conical groove body size in lower part is: the diameter is 60-80 ccm, and the height is 5-15 cm.
3. The special fertilized egg hatching tank for artificial propagation of trachidermus fasciatus as claimed in claim 1, wherein the egg block supporting net is a bolting silk net with 10-20 meshes.
4. The special fertilized egg hatching tank for artificial propagation of trachidermus fasciatus as claimed in claim 1, wherein the horizontal tube is provided with a flow control valve.
5. The special fertilized egg hatching tank for artificial propagation of trachidermus fasciatus as claimed in claim 1, wherein a circular water outlet and a seedling collecting port with the diameter of 2-4 cm are arranged 4-6 cm away from the top of the outer side surface of the hatching tank, the water outlet and the seedling collecting port extend 3-8 cm outside the cylindrical tank of the hatching tank, and a hose is externally connected to the water surface of the cultivation pool.
6. The special fertilized egg hatching tank for artificial propagation of trachidermus fasciatus as claimed in claim 5, wherein the hatching tank is located beside the fry rearing pond, the water outlet and the fry collecting port correspond to the fry rearing pond, and the fries after hatching directly enter the fry rearing pond along with water flow.
7. The fertilized egg hatching tank special for artificial propagation of trachidermus fasciatus as claimed in claim 5, wherein the bottom of the hatching tank is supported by a hatching tank support.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121400897.9U CN215346501U (en) | 2021-06-23 | 2021-06-23 | Dedicated embryonated egg hatching groove of artificial breeding of trachidermus fasciatus |
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| CN202121400897.9U CN215346501U (en) | 2021-06-23 | 2021-06-23 | Dedicated embryonated egg hatching groove of artificial breeding of trachidermus fasciatus |
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| CN202121400897.9U Active CN215346501U (en) | 2021-06-23 | 2021-06-23 | Dedicated embryonated egg hatching groove of artificial breeding of trachidermus fasciatus |
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