Anal identification method Among various methods of identification, the anal identification method is the most reliable and accurate, and it is also the most commonly used in production. There is a small protrusion in the center of the lower end of the cloak opening of the duckling, called the reproductive protrusion. On both sides of the reproductive process, there is a fold, which is inwardly slanted and called eight-fold. Genital processes and figure-shaped folds constitute a reproductive uplift. Breathing opening of cloaccula can be seen in the opening of the cloaccula, reproductive protrusions are abundant, about 2 to 4 mm long, the surface is tense, elastic, shiny, sharp outline, finger compression is not easy to deform; the opening of the cloacal cavity of the young female is generally free of reproductive processes, there is residual reproduction The protrusions are mostly atrophic, the protrusions are soft, inelastic, and dull, and the fingers are easily deformed by compression. The best time for identification is 12 hours after the shell villi dry. At this time, the male and female chicks have the most significant differences in the morphology of their reproductive processes, and ducklings are also easy to grip. The ducklings are full and easy to open. Early identification, ducklings body soft, weak breathing, poor absorption of egg yolk, not easy to turn the anus, this time turning the anus on the ducklings too much stress; too late to identify the anal, reproductive processes change, the difference is a certain degree of difficulty , And the anus is not easy to open tight, if forced operation is easy to cause some damage to the ducklings. The operation method is to turn anal method, pinch anal method and top anal method. The method of anal visualization is more accurate, but it is slower. The operator sandwiches the neck of the duckling with the middle finger and the ring finger of the left hand and raises its abdomen upwards. The ring finger and the little finger hold the ducklings on both feet. Pay attention to the strength. Be firm and do not damage the ducklings. The thumb is close to the abdomen. Side, light pressure abdominal defecation, with his right thumb and index finger on both sides of the cloacal, gently open cloaca, such as cloaca in see the spiral protrusion, that is, male, if the triangular valve fold, that is Mother chicks. When you turn the anus, you are asked to "have an eye for seven points and a hand for three points." On the one hand, the operator is required to have good eyesight in order to ensure accurate judgment; on the other hand, it also requires the operator to be gentle, fast and not brutal; moreover, the light should be moderate, and the anal veritability is an observation of the fine structure. The work, so the light should be sufficient and concentrated, light is too strong or too weak will make the eyes easily fatigue, is not conducive to identification. The pinching anal method is popular in traditional workshops and requires long-term rich experience. Hold the ducklings in their left hand and bring them back upside down and belly down. Gently squeeze the outside of the duckling cloaca with the thumb and index finger of the right hand. If the fingers are between the fingers and the size of the rapeseed or sesame seeds, it is Male chicks, otherwise female chicks. When you begin to learn, you can pinch it a few times, but you must use less force. You can't move back and forth so as not to hurt your anus. This method is simple, fast, skilled person can identify 1 500-1 800 newborns per hour, the accuracy rate of up to 100%. The anal fistula method is more difficult than the pinching anal method and requires the operator to have a higher skill level. Hold the duckling in the left hand, sandwich the duckling body with the index finger and the ring finger of the right hand. The middle finger gently raises the top of the anus. If there is a small protrusion, it is a male chick; otherwise, it is a mother chick. The vertex rectal method is faster than the anal method and pinched anal method, but it is technically difficult and requires long-term training to master it. 2 shape identification method There are some differences in the appearance of male and female chicks when hatched. Therefore, identification can be performed accordingly. In general, males have larger physiques, longer body lengths, larger heads, longer necks, higher foot lengths, sharper tail feathers, longer jaws, flank edges around the chin, angular wing-like nap, hairy nose, narrow nose, linear, nose The edges are rough and undulating, and the edges of the mandibular hair are distinctly solid, triangular and irregular; females have smaller physiques, short round bodies, small heads, short necks, short legs, loose tail feathers, and short pupas. The burr around the crotch is curved, the nose is wide, round, the nose is soft, not undulating, the mandibular hair edge is curved and neat. 3 pipe identification method The ducklings have a large tympanum in the trigone of the lower part of the trachea and the entrance to the chest (ie, the base of the neck, the inner side of the two clavicles, and the bifurcation of the bronchus). It is the vocal organ of the duck and is called the vocal tube. In the duckling period, the syllables of the male and female chicks have large differences in their morphological structure. The enlargement of the bell tube of the male chick is spherical, with a diameter of about 3 to 4 millimeters. It can be found on the chest, while the female duckling is only slightly larger at the intersection of the trachea. When operating, support the ducklings with your right hand and place the index finger of your right hand in the position of the crop that is equivalent to the chicken. The thumb of the left hand is placed on the back of the neck of the duckling and the index finger is placed on the lower jaw of the duckling. In the case of male ducklings, when the index finger of the left hand causes the head of the duckling to move up and down, the right index finger can touch four slightly active hard objects that resemble the size of the mung bean, whereas the female duckling does not. 3 Ply Surgical Mask,Disposable Medical-Surgical Mask,Coronavirus 3D Mask,Dust Masks With Filters Dust Dongguan City Risen Medical Products Co., Ltd. , https://www.risenppe.com