Feeding methods and nutritional value of black dolphin

The black dolphin is small (1-1.5 kg). The black dolphin is mild-tempered, likes to live in groups, timid, afraid of fear, afraid of interference, and sharp hearing. Black hair, black eyes, black mouth, black feet, no tail, short ears and limbs, not good at jumping, generally do not bite or scratch people. In ancient China, there was a habit of eating black dolphin beaver meat, and it was selected as a high-end wild vegetable into the Chinese famous recipe. Su Dongpo, a poet and gourmet in the Song Dynasty, regretted that he had not tasted the meat of the dolphin and beaver for the rest of his life, and wrote a poem saying, "he was captured in the warehouse, ashamed that he could not eat." The delicacy of the black dolphin beaver has its own "turtledove in the sky, dolphin beaver on the earth".

Alias

[alias] Dutch pig, Dutch rat, guinea pig, because it is black all over

Black dolphin

So it's called black dolphin.

Place of Origin

The black dolphin is native to Peru in South America.

Generic class

[genus] are mammalian herbivores

Feeding method

First, breeding facilities: black dolphins are raised in a variety of ways, taking measures according to local conditions, and the commonly adopted methods are: cage breeding, pond-type captive breeding, three-dimensional scale factory breeding. (1) caged. Where a small amount of feeding can be used in this way. The utility model has the advantages of being able to control reproduction, feed and keep clean and hygienic. The cage can be made of wood strips, bamboo chips and iron wire, with a scale of 60 cm × 50 cm × 40 cm. (2) Pond captivity. It is suitable to be used in the case of bungalow and width. The room is divided into a 0.5-1 square meter pool with bricks and planks, and some sawdust or hay had better be padded in the pool, which is conducive to keeping warm and absorbing moisture. At present, most of them are raised by this method. (3) three-dimensional factory feeding: it is large in scale, relatively centralized, easy to manage, operate and raise a large quantity. Use brick or wood, iron bar to make 3-5 layers, the bottom is slightly inclined, so that feces flow out, easy to manage. There are small doors in the pool and cage. All kinds of feeding methods generally have a small density of 8-10 per square meter and a large density of 10-20.

Second, feeding supply: the diet of black dolphins is very miscellaneous, and adequate nutrition is needed for normal growth, development and reproduction. As the black dolphin is a herbivore, the digestibility of crude fiber is high, such as long-term supply of green material or hay and other plants, the peeling phenomenon will occur, so the feeding supply should be refined, green materials should be properly matched. (1) concentrate: corn meal, wheat bran, rice bran, etc., and can also be fed to piglets; (2) Green feed: fresh tender grass, such as oak grass, corn leaves, sugarcane leaves, leaves, green vegetables, peels, carrots, sweet potatoes, etc.

Third, feeding management: feeding management is the key to black dolphin breeding, with emphasis on preventing feed from mildew and deterioration. When pellet feed is fed directly, you should put clean water for drinking, or mix feed, eat less and eat more, about 40 grams of adult diet, twice a day, to keep the trough clean and hygienic. After feeding the concentrate, fresh green material is added at the same time. The green material had better be cut and fed on the same day, and the daily intake of green material per adult is about 250 grams to prevent feeding of green material contaminated by pesticides.

The feeding room should be kept quiet, the feces should be cleaned every day, and the utensils should be scrubbed clean frequently. It is best to keep the room temperature at 18-25 ℃ and the relative humidity at 45-55%. Keep warm in winter. Prevent rodents and snakes from entering the breeding room to create a comfortable environment for black dolphins.

4. Reproduction: after preliminary observation, the female was born about 45 days, and the male showed sexual characteristics in about 70 days, but the first mating period of the female should be after 70 days to ensure the reproduction rate.

1. Sex identification. 2. Selection. The time of maternal estrus lasts 1-18 hours. After mating, there are rubber-like embolism and secretory mixture at the vaginal orifice. According to whether this embolism is present or not, we can judge whether the black dolphin is successful or not. When raising in large groups, 2-3 mothers are often used to mate with one male, and do not put more than 2 males for mating at the same time, otherwise it will cause struggle and affect mating. In the course of breeding, if there is a close relative variant of the same generation, that is, the healthy bodies of male and female distant relatives should be replaced to improve the degree of purebred; if it is propagated as the original species, the method of one male and one female distant breeding can be adopted. The mother can breed after weaning, or put it into the male within half a day after giving birth, if it is successful, it can improve the reproduction rate.

During the gestation period of 56-68 days, the number of black dolphins was 1-6 and 3-15. The cubs began to feed 3-5 days after birth, and were weaned at about 15-20 days and raised separately.

nutritive value

Both medicine and food. Black dolphin meat is delicious and delicate, easy to digest and absorb, and the folk regard it as a "body-strengthening treasure" whose fur can be processed and used.