What are the physiological characteristics of ducklings? What are the characteristics of the body of

1) The younger the age of the fast-growing duck, the faster the growth and development. The duckling stage is the fastest growing period in a duck's life and requires a high level of nutrients. (2) There is a yolk sac in the abdomen of the newly hatched duckling, which weighs about 10 grams, and its function is to supply the main nutrients to the ducklings within 3 days of age.

The absorption of the yolk sac of the strong chick is fast, the growth and development are fast, and the early opening of drinking and eating and proper temperature supply can promote the absorption of the yolk sac, and the absorption of the yolk sac of the weak chick is slow, the growth and development are stunted, and most of them are defective ducks when they grow up. (3) The function of regulating their own temperature is imperfect, and the body temperature of ducklings is lower than that of adult ducks2 3, the adaptability to external temperature changes is poor, the self-regulation function is imperfect, and the fluff is thin and loose, the subcutaneous fat layer has not yet been formed, and the thermal insulation performance is poor. (4) the volume of the stomach is small, the feed intake is small, the ducklings grow and develop quickly, the nutrients needed are more, and the digestion and metabolism are vigorous, but the stomach volume of the ducklings is very small, and there is no obvious sac, so the feed intake is very small, so the duckling diet should be fine and not coarse, and the feeding times should be more, so that less feeding is added frequently.

Ducklings are ducklings that are indicated to be 3 or 4 weeks old after shelling, and many of the physiological characteristics are similar to those of chicks. For example, when the shell is just out of the shell, the constitution is weak, and there is a surplus egg yolk that has not been absorbed; The whole body is covered with soft and thin hairs, which is sensitive to external temperature changes and has poor ability to regulate body temperature; The digestive organs are not sound and the digestive ability is weak, but the growth rate is fast and the relative growth degree is high. Therefore, it is necessary to carefully manage the breeding and strengthen nutrition in order to improve the brooding rate.

If it is not a white duck, the coat color is different, especially the head and wings, some male ducks have green hair on their heads, and their wing feathers are longer than those of female ducks, and the male duck feathers are more colorful and easy to distinguish. White ducks look at their size, and male ducks are relatively large.

Animals are generally male and beautiful, colorful, majestic, and high-spirited. Females are gray, brown. Ducks are no exception.

The habits of wild ducks

1) Migratory.

2) Clustering.

3) Omnivorous.

4) Water-loving.

5) Strong ability to fly.

6) Timid, like quiet Although the mallard duck is wild, but timid, high vigilance, if there are strangers or animals, beasts approaching that will be alarmed, flee in groups, if suddenly frightened, then desperately flee and fly high. Therefore, the environment for wild ducks should be quiet and free from human and animal interference as much as possible.

7) Adaptable Not afraid of heat and cold.

8) Singing The chirping is loud and very similar to that of a domestic duck.

9) Moulting: Moulting 2 times a year.

10) Nesting.

Morphological characteristics Feature 1:

Adult mallard male mallard is larger, with a body length of 55-60 cm and a weight of 1 2-1 4 kg; The head and neck are dark green with a metallic sheen (hence the name Mallard), and there is a very prominent white ring under the neck; Body feathers brownish-gray with gray markings, flank and belly grayish-white, wing feathers purple-blue with white margins; Most of the tail feathers are white, only ** 4 feathers are black and curl upwards like hooks, these 4 feathers are unique to male mallards, called male feathers, which can be used to identify male and female.

Female mallards are smaller, 50-56 cm long, and weigh about 1 kg; The plumage is tan with dark black spots; black stripes on the thorax and abdomen; The tail feathers are similar to those of domestic ducks, but the feathers are bright and compact, with round white twist patterns of varying sizes; There are no white rings under the neck, and the tail feathers are not curled.

Mallard mallard has orange-yellow legs and feet with black claws. Therefore, it is also called the big red-legged duck.

Feature 2: Morphological characteristics of the duckling and its growth process The whole body of the duckling is black-gray down feathers, the face, shoulders, back and abdomen are alternated with pale yellow down feathers, the beak and feet are gray, and the toes and claws are yellow.

There is a certain pattern in the growth and change of feathers. At 15 days of age, the coat color turned grayish-white, and the abdominal feathers began to grow. 25-day-old wing feathers grow, side feathers are full, spread feathers; At 30 days of age, stiff bristles have been seen at the tips of the wings, and the abdominal feathers are full; 40-day-old plumage with wingtips about 4 cm long; tail feathers at 45-day-old age; 50-day-old dorsal feathers long, wingtip feathers about 8 cm long; At 60 days of age, the wing feathers elongated to 12 cm, and the brocade feathers of the ailerons began to grow; At the age of 70, the main wing feathers are 16 cm long, and the brocade feathers are long and begin to fly; At the age of 80 days, the plumage is long, the wings are up to 19 cm long, and it has the morphological characteristics of an adult duck.

Feature 3: Male and female identification Adult mallards, male mallard tail feathers** have 4 male feathers, which are black and curl upwards like hooks, and there is a very obvious white ring under the neck. These are the most typical traits of adult male mallards, while adult females do not have these characteristics.

1) The body temperature regulation function is poor, the duckling down is sparse and short, the body temperature is about 3 lower than that of the adult duck within 1 week of age, and the physiological function of regulating body temperature within 3 weeks of age is not perfect, and it cannot resist the low temperature environment.

2) Fast growth and development, vigorous metabolism Ducklings grow fast, and their weight at 4 weeks old is more than 10 times the weight of newborns. Therefore, in order to ensure the rapid growth of ducklings, adequate drinking water and feeding should be ensured.

3) weak digestive ability ducklings digestive tract volume search is small, muscle and stomach contractility makes the piglets weak, poor digestive gland function, so the digestive ability is not strong, must be fed with good nutrition, easy to digest feed.

4) Ducklings are timid and easy to get together Ducklings are timid and easy to be frightened, and they will be disturbed if the external environment changes slightly. Therefore, during the brooding period, it should be taken care of day and night, and the feeding density should be properly controlled to prevent the ducklings from crushing and crushing.

5) poor resistance to stress, susceptible to disease ducklings are small, many aspects of the function has not yet developed, so the ability to adapt to changes in the external environment is poor, disease resistance is also weak, coupled with the brooding period feeding density is higher, more susceptible to infection, so in the daily management and watering, grazing should pay special attention to reduce stress, do a good job in epidemic prevention and sanitation.

(1) weight growth is fast such as Shao duck, the absolute increase of body weight after 2 weeks of age accelerates, reaches the peak at 6 weeks of age, gradually decreases after 8 weeks of age, and then tends to stabilize, to 16 weeks of weight has been close to adult duck weight.

2) Feather growth is rapid such as Shao duck, at the end of the brooding period, the duckling is still covered with down, brown-red sparrow feathers have just grown, and by 6 weeks of age, the chest feathers have grown together, flat and smooth, reaching the "slippery bottom."", 7-week-old young duck has reached "three-sided light."", 8 weeks old has grown the main wing feathers, 12-13 weeks The abdomen of the duck has been replaced with a second new feather, the 15-week-old duck has grown all the feathers, and the two wings of the main wing feathers have been "winged."".

3) Rapid development of sexual organs After 10 weeks of age, during the second moulting, the follicles on the ovaries are also growing rapidly, and after 12 weeks of age, the development of sexual organs is especially rapid. In order to ensure the full growth of the bones and muscles of young ducks, it is necessary to strictly control the premature sexual maturity of young ducks, which is necessary to improve egg production performance.

4) Strong adaptability With the growth of age, the body temperature regulation ability of young ducks is enhanced, and the adaptability to external temperature changes is also strengthened. At the same time, due to the growth of feathers, the ability to withstand the cold is gradually strengthened. Therefore, young ducks can be raised at room temperature or even in the open air.