CN203194305U - Incubation cage of sepiella maindroni zygotes - Google Patents

Abstract

The utility model discloses a hatching cage for the fertilized eggs of the needleless cuttlefish, which comprises a hatching cage frame with foam floats, and the hatching cage frame is hung with a nylon mesh enclosing the shape of a net box, wherein: the bottom of the nylon mesh A plastic shrinking rope is arranged nearby; a plastic disc is connected to the inner side of the shrinking rope; small holes are evenly distributed on the plastic disc. Because the adopted structure is simple, the manufacture is convenient, the cost is low, and the production operability is strong, it is easy to popularize and use in the mansoni squid artificial breeding production units; the hatched larvae can be selected and optimized in a relatively fast time, and can obtain Larvae with neat specifications, strong vitality, no damage, and high quality. Significantly lower rates of disease compared to larvae hatched from other devices.

Description

Incubation cage for fertilized eggs of Squid mansoni

technical field

The utility model relates to a fish egg hatching device and method, in particular to a hatching selection method and a special device for the fertilized eggs of the needleless cuttlefish.

Background technique

Sepiella maindroni de Rochebrune, commonly known as cuttlefish and order fish, belongs to the phylum Mollusca, class Cephalopoda, order Decapoda, family Sepiidae, and the genus Squid ( Sepiella), which is widely distributed along the coast of my country, was once one of the four traditional sea-caught aquatic products in my country and has high economic value. In recent years, Chinese scholars have gradually carried out the research work on broodstock fishing, domestication and breeding of squid mansoni, and artificial seed breeding technology, and have basically solved the problem of industrial artificial seedling breeding, but in artificial seedling production, there are still fertilization problems. The phenomenon that the egg hatching rate is low, the hatching rate is generally only about 10%. There are many factors that affect the hatching rate of fertilized eggs, such as the quality of fertilized eggs, the attachment of fertilized eggs, water temperature, water quality, salinity and other cultivation conditions, etc. Inappropriate hatching methods will lead to lower hatching rates, and It also affects the quality of hatched larvae. At present, in the artificial breeding of squid mansoni, the hatching method of fertilized eggs is generally to put plastic ropes, meshes, etc. After the fertilized eggs are attached to the egg-attaching device, the rope and mesh attached to the eggs are directly moved into the nursery pool, suspended in the water body, and hatched by controlling the cultivation conditions such as water temperature, salinity, pH value, and light. The disadvantage of this method of operation is that there are too many attached eggs and too thick eggs, the egg grain density is too large, it is easy to cause disease, and it is easy to cause egg grain hypoxia, hinder the embryo's respiration, and the eggs wrapped in the middle are stunted or even rotten. , This hatching method not only seriously reduces the hatching rate, but also directly mixes impurities, dead eggs, and hatched poor-quality larvae into the breeding pool, affecting the success rate of seedling breeding. There is also a patent report (ZL201020596632.6) using a water-free incubator to incubate the fertilized eggs of squid mansoni, but this method is only suitable for laboratory conditions or small-scale breeding work, and it is difficult to productively breed squid mansoni Promote applications. In view of the importance of high hatchability and high-quality larvae for artificial seedling production, it is urgent to design a hatching device suitable for production, which can improve the hatchability of fertilized eggs and can play the role of optimal larvae selection.

Contents of the invention

The purpose of the utility model is to provide a hatching cage for the fertilized eggs of Mansoni's needleless cuttlefish which is suitable for application in production, can improve the hatching rate of the fertilized eggs, and can play the role of optimal selection of larvae.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: the hatching cage of the fertilized eggs of Mansoni's needleless cuttlefish, including the hatching cage frame with foam floats, and the hatching cage frame is suspended with nylon cages in the shape of a cage. The mesh, wherein: a plastic shrinkage rope is provided near the bottom of the nylon mesh; a plastic disc is connected to the inner side of the shrinkage rope; small holes are evenly distributed on the plastic disc. Due to the simple structure adopted, convenient manufacture, low cost and strong production operability, it is easy to be popularized and used in the artificial breeding production units of the needleless cuttlefish; it is easy to clean the fertilized eggs in the hatching cage and disinfect the cage; the fertilized eggs can be scattered and distributed On the plastic disc, the problems of excessive density of fertilized eggs, easy hypoxia of fertilized eggs, and obstruction of embryo respiration are solved, and the hatching rate of squid eggs is effectively improved; the burr edge of the small hole can promote the rupture of squid larvae. To improve the hatching survival rate, the hatched larvae can be selected in a relatively fast time, and the larvae with neat specifications, strong vitality, no damage and high quality can be obtained. 30% less sickness compared to larvae hatched from other devices.

The aperture of the small hole on the plastic disc is 1mm-20mm.

Because the utility model has adopted the bottom of the nylon mesh to be provided with a plastic shrinkage rope; the inner side of the shrinkage rope is connected with a plastic disk; Due to the simple structure adopted, convenient manufacture, low cost and strong production operability, it is easy to be popularized and used in the artificial breeding production units of the needleless cuttlefish; it is easy to clean the fertilized eggs in the hatching cage and disinfect the cage; the fertilized eggs can be scattered and distributed On the plastic disc, the problems of excessive density of fertilized eggs, easy hypoxia of fertilized eggs, and obstruction of embryo respiration are solved, and the hatching rate of squid eggs is effectively improved; the burr edge of the small hole can promote the rupture of squid larvae. Improve the hatching survival rate. Using this hatching device, the hatching rate can reach 25.0%~33.8%, which is much higher than other hatching methods of 12.1~18.5%. Compared with other hatching methods, using this hatching device can increase the hatching rate by 26.3~ 35.2%; hatched larvae can be optimized in a relatively short period of time, and larvae with neat specifications, strong vitality, no damage, and high quality can be obtained. 30% less sickness compared to larvae hatched from other devices.

Description of drawings

Fig. 1 is the utility model embodiment device structural representation;

Fig. 2 is the enlarged schematic view of the utility model hatching cage;

Fig. 3 is an enlarged schematic view of the plastic disc of the present invention.

Detailed ways

Below in conjunction with attached embodiment the utility model is described in further detail.

Description of reference numerals: clean seawater 1, water inlet valve 2, cement cultivation pool 3, hanging rope 4, hatching cage 5, fertilized egg 6, foam float 7, fixed rope 8, water outlet valve 9, air-dispersing stone 10, hatching Cage frame 11, nylon mesh sheet 12, plastic disc 13, plastic shrinkage rope 14, aperture 15.

Embodiment: With reference to Fig. 1 to Fig. 3, the hatching cage of the fertilized egg of the needleless cuttlefish of Mansoni comprises the hatching cage frame 11 with foam floater 7, and the nylon net that encloses the shape of cage is suspended on the hatching cage frame 11 Sheet 12, wherein: plastic shrinkage rope 14 is provided near the bottom of nylon mesh sheet 12; Plastic disc 13 is connected to the inner side of shrinkage rope 14; Small holes 15 are evenly distributed on the plastic disc 13. Due to the simple structure adopted, convenient manufacture, low cost and strong production operability, it is easy to be popularized and used in the artificial breeding production units of the needleless cuttlefish; it is easy to clean the fertilized eggs in the hatching cage and disinfect the cage; the fertilized eggs can be scattered and distributed On the plastic disc, the problems of excessive density of fertilized eggs, easy hypoxia of fertilized eggs, and obstruction of embryo respiration are solved, and the hatching rate of squid eggs is effectively improved; the burr edge of the small hole 15 can promote the membrane rupture of squid larvae , improve the hatching survival rate, can select the best hatched larvae in a relatively fast time, and can obtain larvae with neat specifications, strong vitality, no damage, and high quality. 30% less sickness compared to larvae hatched from other devices.

The diameter of the aperture 15 on the plastic disc 13 is 1mm-20mm.

The method for hatching and selecting the fertilized eggs of Squid mansoni includes: attaching the fertilized eggs 6 after parental mating and laying eggs of squid mansoni to the egg-attaching utensils such as ropes, and then directly inserting long strings and thick fertilized eggs 6 Cut off the rope from the attached egg appliance, cut into single fertilized eggs 6 or cut into short rope sections, the number of fertilized eggs 6 on each rope section is controlled at 20-50, and single fertilized eggs 6 or divided The fertilized eggs 6 of the section are directly placed on the plastic disc 13 in the hatching cage 5 . The relatively uniform distribution of fertilized eggs can reduce the proportion of dead eggs caused by hypoxia. Simultaneously, because the egg membrane surface is in contact with the small hole 15, the agitation of the water flow causes friction, which can promote the emergence of the larvae and improve the survival rate.

An air-dispersing stone 11 connected to an air pump through a trachea is placed every 1m ² -2m ² in the water body where the hatching cage 5 is located.

The area of the cement cultivation pool 3 is 20m ² ~ 30m ² , and the water depth is preferably 1.0m ~ 1.5m. A fixed rope 8 is set between the pool walls, and an air-dispersing stone connected to the air pump through a trachea is placed every 1m ² ~ 2m ² in the pool. 11. To increase the oxygen in the water body, the cement cultivation pool 3 controls the water intake and drainage through the water inlet valve 2 and the water outlet valve 9. After putting clean seawater 1 into the cement cultivation pool 3, put several hatching cages 5 into the pool, and use The hatching cage 5 is tied to the fixed rope 8 by the hanging rope 4. The hatching cage 5 is first made of a PE plastic tube to form a hatching cage frame 12, and the nylon mesh 12 woven by nylon rope is arranged on the hatching cage frame 12. The nylon mesh 12 The diameter of the mesh is 5mm-20mm, preferably 5mm, and a plurality of foam floats 7 are arranged on the outer edge of the hatching cage 5, so that the hatching cage 5 rises and falls with the change of the water level in the cement cultivation pool 3, and the 100mm place at the bottom of the hatching cage 5 is used. Nylon shrinkage rope 14 fixes a plastic disc 13 on the nylon mesh 12. The diameter of the plastic disc 13 is 45mm. There are several small holes on the plastic disc 13. The aperture is 1mm-20mm, preferably 2mm, which is smaller than Man’s needle-free The diameter of the fertilized eggs 6 of cuttlefish, after the fertilized eggs 6 of the squid's parent mating and laying eggs are attached to the egg-attaching utensils such as ropes, the long string and thick fertilized eggs 6 are directly connected from the egg-attaching utensils. The rope is cut off and cut into a single fertilized egg 6 or cut into several short rope segments. The number of fertilized eggs 6 on each rope segment is controlled at 20 to 50. Single fertilized eggs 6 or segmented fertilized eggs 6 Place it directly on the plastic disc 13 in the hatching cage 5, and control the water temperature, salinity, dissolved oxygen, pH and light intensity according to the hatching requirements of the fertilized squid eggs 6 of Mansoni. After the squid larvae hatched, use a soft hand-made net to select the larvae, and remove the weak and vigor and ink-jet or damaged larvae from the hatching cage 5, and remove the larvae with good phototaxis and dark body color. , Vigorous strong larvae are directly skimmed into the cement cultivation pond 3 and cultivated. After the fertilized egg 6 hatches, the hatching cage 5 is moved out of the cement cultivation pond 3, and it is standby after cleaning and disinfection.

Although the utility model has been described in conjunction with the preferred embodiment, it is not intended to limit the utility model, any skilled in the art, without departing from the spirit and scope of the utility model, can make reference to the utility model listed here The subject matter is subject to various changes, substitutions of equivalents and modifications, so the scope of protection of the present invention should be determined only by the scope defined by the appended claims.

Claims (2)

1. Sepiella maindroni fertilized egg hatching cage, comprise the have foam plastic float hatching cage framework (11) of (7), and this hatching cage framework (11) is gone up to hang and is provided with the nylon mesh sheet (12) that surrounds the net cage shape, it is characterized in that: described nylon mesh sheet (12) is provided with plastic shrink rope (14) near the bottom; Described retraction cord (14) inboard is connected with plastic disc (13); Be evenly equipped with aperture (15) on the described plastic disc (13).

2. Sepiella maindroni fertilized egg hatching cage according to claim 1, it is characterized in that: the aperture of the aperture (15) on the described plastic disc (13) is 1mm-20mm.

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