Every poultry breeder should know the peculiarities of care and breeding of poultry if he wants his economy to flourish. In order for the incubation process to be as effective as possible, you should know how to ovoscopy duck eggs daily.Ovoscopy is the screening of eggs for the presence of an embryo. The procedure is performed using an ovoscope. You can buy it in the store or build it yourself.
- Features of the procedure
- Initial stage
- Second transmission
- Control in the third stage
- Fourth transmission through
- Why the chicks freeze
- The final part
Features of the procedure
Ovo up duck eggs do not need to be done daily. This frequency increases the risk of damage. Based on the experience of many generations of poultry farmers, it will be rational to conduct four examinations.
The best option is to see the presence of the embryo before incubation, and then 3 more times throughout the incubation period to make sure that the development process is proceeding correctly. Such a system of examinations will allow solving two urgent issues at once: determine the quality of the eggs and preserve the brood.
Ovoscopy of duck eggs at the initial stage involves the distribution of quality materials and screening of rejects .Experienced poultry farmers strongly recommend not to abandon the rejection procedure in order to avoid a decrease in the incubation efficiency. What factors can determine a defective egg:
- spotting of the shell – this color indicates a lack of Ca or its overabundance;
- when the presence of blood masses is visible;
- pathological parameters of the air cavity;
- dark spots are most often a signal that mold has developed;
- catatonia of the yolk most often indicates that it has dried to the shell;
- white stripes – evidence of micromechanical damage;
- if there are no clearly defined borders of the yolk, most often in such cases, it is mixed with the protein because of his break.
In addition to this, should not be placed in the incubator eggs, which can be seen two yolks. To fully understand how to reject, you can more carefully consider the process in the video on this topic. After control translucency, eggs should be laid in the incubator.
In the second stage, attention should be paid to the development of the embryo. During ovoscopy, the egg should acquire a pink hue. The embryo itself does not have to be clearly visible, due to the fact that it is still inside the yolk. There should be no blood rings around the yolk. It is quite clearly possible to consider the circulatory system of the chick.All these signs will indicate normal development of the fetus.
If ovoscopy shows signs such as the absence of the circulatory system of the duck embryo, its proximity to the shell, and the color of the egg is very close to transparent, we can conclude that the probability of underdevelopment is increased fetus. The second ovoscopy is performed on the 8th day of incubation, and the goose eggs are examined at approximately the same time.
Control in the third stage
The third ovoscopy is performed 5 days after last one. This procedure makes it possible to clearly see the growing duck embryo. This stage allows us to draw final conclusions about the prospects for future development. It is necessary to pay attention to the activity of embryos. If the embryo does not move, such an egg should be removed, and the remaining eggs should be put back into the incubator.
Signs of embryo death:
- underdevelopment of the vascular system;
- an increase in the air cavity.
The fourth stage of transmission
The last exposure of duck eggs is carried out on the 25th day from the beginning of incubation, for a couple of days before the chicks are born. The same rules apply for goose eggs, with the only difference being that they are looked at for 29 days. This stage allows you to determine the readiness of duck embryos for birth.
The last translucence allows you to filter out the dead at the final stage of embryo development.What an egg looks like at the last stage under an ovoscope:
- lumen is almost zero;
- the air cavity is clearly visible;
- the embryo is almost completely developed.
Why the chicks freeze
There are many reasons that negatively affect the development of baby ducks. Germ growth stops if the temperature regime was incorrectly set. The development of duck chicks is often affected by bacterial and fungal infections, dystrophy of the embryos, impaired gas exchange, and genetic diseases.
By carefully monitoring the formation of the embryos, mistakes made can be corrected in a timely manner. Biological control is a whole system that includes the assessment of incubation material, selective opening of eggs with a live embryo, monitoring of the brood and its quality, full accounting of the results of incubation.
In addition to ovoscopy, weight gain can also indicate weight gain . When the eggs overheat under an ovoscope, hyperemia, underdevelopment of the skull will be visible, various deformities will begin to develop. If the eggs do not get enough heat, then maturation stops at the initial stage of incubation. Such ducklings will be inactive, will stand on their legs poorly, often such young animals suffer from digestive disorders.
With increased humidity, the eggs practically do not lose weight, and the protein is covered by allantois later. The last ovoscopy most often shows even parameters of the air cavity, the presence of water in the germinal membranes. Most of the offspring are choked during hatching by an unrealized amniotic fluid. With a lack of moisture, eggs, on the contrary, lose weight very quickly, their shells are fragile. Offspring are born earlier, all offspring are small in size.
When gas exchange processes fail, incubation in the early period is characterized by the development of a large number of deformities, at the later stages various pathologies occur, in the middle of the cycle blood is visible in the amiotic fluid, the changes resemble severe overheating.
The final part
Breeding ducks is a rather difficult task, especially today, when most of the thoroughbred birds cannot independently hatch offspring. To do this, you need to know how to select a duck egg correctly, consider the embryo in it and grow it in an incubator until the moment of hatching. To view duck eggs, you need an ovoscope. Unlike chickens, the process of selecting duck eggs as an incubation material is significantly complicated due to the thickness of the shell.
An ovoscope is a device that is designed to determine the quality of the incubation material at the beginning and during the incubation period. The device can be of various shapes and sizes, but most often it is a case with a light bulb and oval holes inside. Ovoscopy by day does not imply a daily check, but only four stages.
Ovoscopy by day helps to identify defects in the formation of the fetus in the early stages, as well as determine the causes of the non-standard development of duck chicks. It is necessary to carry out the procedure before laying eggs in the incubator, then set the desired mode and carry out a second scan in a week.The third ovoscopy occurs after 5-7 days, and the last – a couple of days before the hatching of duck chicks. Today, if you do not know how to carry out the procedure or where to put the defective eggs, you can use the video on this topic and study everything in detail.