Table of Contents
1. Habitat
2. Morphological Characteristics
3. Distribution Range
4. Wide range of diet, meat flavor, can be marketed year-round and other advantages. Its habits have the following characteristics:
1, the marsh shrimp is an omnivorous aquatic animals, favoring animal feed, artificial culture to feed mainly commercial feed. The optimal growth of the water temperature of 18-30 ℃, when the water temperature drops to 4 ℃ into the overwintering period, when the water temperature rises to 10 ℃ above the vitality of the strengthening of feeding gradually strengthened.
2, the benthic life, like to live in the grassy water at the slow flow. Habitat depth ranging from 1-2 meters to 6-7 meters. Summer and fall shrimp in shallow water along the shore to find food and reproduction. In winter, they move to deeper water for overwintering, rarely feeding and activities.
3, the water temperature of about 18 ℃, sexually mature shrimp began to mate spawning, shrimp mating is often near the spawning time.
4, the blue shrimp with backlighting, hidden in the dark during the day, out at night. Reproductive season, but the opposite is true, will also come out during the day for mating activities; and feeding, will also come out during the day to compete for food.
The shrimp's main food for plant debris, plankton, rotting vegetables, rice. Often gathered in the bridge abutments, sluice gates, dams, piles of rocks, river * roots and water plants around.
The green shrimp in the world is distributed only in China and Japan, in addition to China's northwest of the plateau and desert areas, regardless of which other regions, as long as there is water resources have its presence.
Morphological features
The green shrimp body shape is thick and short, the entire body consists of two parts of the cephalothorax and abdomen. Cephalothorax segments jointed by a large bony plate covering the dorsal side and sides, called cephalothoracic armor or dorsal armor. The cephalothorax is thick, the abdomen is thicker in the front and gradually thinner and narrower in the back. The frontal horn is located in the center of the anterior end of the cephalothorax, with a flat upper edge and a sharp end, and the anterior end of the dorsal armor has a sword-like protuberance, with 11 to 15 reddish teeth on the upper edge and 2 to 4 teeth on the lower edge.
The body surface of the green shrimp has a hard shell, plays a role in protecting the body, its overall by 20 body sections, head 5 sections, chest 8 sections, abdomen 7 sections, there are 5 pairs of footsteps, the first 2 pairs of pincers, after 3 pairs of claw-like. Among the male shrimp, the 2nd pair of footsteps is particularly powerful, the 6th abdominal segment of the appendages evolved into a powerful tail fan, play a role in maintaining the balance of the shrimp, lift and retreat.
The shrimp has a pair of compound eyes on either side of the base of the frontal horns, which are attached to the end of the eye stalks, and the compound eyes are free to move and are called stalk eyes.
The caudal segment of the green shrimp is pointed and thin, and its back has 2 pairs of small movable spines. In addition to the caudal segment, 1 pair of appendages per segment.
Range of Distribution
The green shrimp is also known as river shrimp, marsh shrimp, or Japanese marsh shrimp. Is a widely distributed in freshwater waters of the main economic shrimp, it is rich in nutrients, tender meat flavor, is a popular and valuable aquatic products. Green shrimp in China's distribution is extremely wide, Jiangsu, Shanghai, Zhejiang, Fujian, Jiangxi, Guangdong, Hunan, Hubei, Sichuan, Hebei, Henan, Shandong and other places are distributed. It lives in a wide range of freshwater lakes, rivers, pools, marshes, Baiyangdian, Hebei Province, Jiangsu Taihu Lake, Shandong Weishan Lake produced the most famous green shrimp.
Green shrimp like to inhabit in rivers, lakes, ponds, ditches along the shallow water or grassy slow flow, hibernating in the shadows during the day, night activities, often in the water underwater, watercress and other objects on the edge of the crawling.
Farming techniques
Mixed culture
Pond conditions in the mixed shrimp and fish, the requirements for the pond is an area of 0.5 to 2 acres, the depth of water should reach 0.8 to 1 meter. First of all, the pond should first be cleaned thoroughly with quicklime. In the first 3 to 5 days of the pond time, each acre should be applied to the base fertilizer about 250 to 400 kg, and the pond should be thoroughly cleared of wildlife and pests.
Larvae under the pond under the pond to grasp the temperature difference of not more than 3 ℃. If the temperature difference is too large, first adjust the water temperature, to be basically the same, before the young shrimp in the pond upwind into the water, stocking is strictly prevented from violently pouring, so as to avoid choking the young shrimp into the mud and asphyxiation death. Green shrimp larvae in the pond before the water test, proving the disappearance of toxicity, before stocking green shrimp larvae.
Baiting in the early hours of the pond, every 10,000 juvenile daily cast soybean paste 5 grams (dry weight). Specific feeding volume should also be based on pond water quality, weather changes and the feeding situation of green shrimp, flexibility. The end of the metamorphosis of green shrimp larvae, that is, with summer flowers or large-size fish species mixing, switching to peanut cake powder. With the growth of shrimp, the number of bait should be gradually increased, while gradually increasing the peanut cake particles for the shrimp to hold nibbles. According to the shrimp often inhabits shallow water near the shore and night feeding habits, the bait should be splashed in shallow water near the shore, and in the evening to add a cast. Fish stocking shrimp metamorphosis, can be stocked with summer flower fish species or large-size fish species.
Water quality regulation than monoculture fish, fish and shrimp mixed culture of water quality requirements are more stringent. Especially during the feeding period, the water temperature should be 20 ~ 30 ℃, the transparency of the pond water should be maintained at 23 ~ 29 centimeters, pH value of 7.0 ~ 7.2. And every 5 ~ 7 days to inject 10 ~ 15 centimeters of water, so that the dissolved oxygen of the pond water has been maintained at a relatively high level.
Nutritional value
Nutritional analysis
⒈ shrimp is rich in nutrients, and its meat is fluffy, easy to digest, for the body is weak as well as the need to recuperate after the disease is an excellent food;
2. Shrimp is rich in magnesium, magnesium has an important role in regulating cardiac activity, can be very good protection of the cardiovascular system, which reduces the level of cholesterol in the blood to prevent Arteriosclerosis, but also to expand the coronary arteries, is conducive to the prevention of hypertension and myocardial infarction;
3. Shrimp lactation role is strong, and rich in phosphorus, calcium, children, pregnant women in particular have the effect of tonicity;
⒋ Japanese scientists at the University of Osaka found that shrimp astaxanthin in the body to help eliminate the jet lag due to jet lag reaction and jet lag disorder.
Everyone can eat
⒈ suitable for kidney impotence, male infertility, waist and feet of people to eat; suitable for middle-aged and elderly people due to calcium deficiency of calf cramps to eat; middle-aged and elderly people, pregnant women and patients with cardiovascular disease is more suitable for consumption;
peak hangover disease, when it is time to fire should not eat shrimp; allergic rhinitis, bronchitis, recurrent allergic dermatitis is not suitable for eating shrimp; shrimp is the movement of the wind, the wind is not a good idea to eat shrimp. Should not eat shrimp; shrimp for moving wind hair, suffering from skin scabies people avoid eating.
Therapeutic effects
Shrimp is warm and sweet, into the liver, kidney meridian;
To tonify the kidneys and yang, breast milk antitoxicity, nourish the blood essence, stasis detoxification, benefit from qi and nourish yang, through the pain, appetizer phlegm, etc.;
Suitable for renal impotence, spermatozoa, premature ejaculation, breast milk, tendons and bones, convulsions, body itching, skin ulcers, weakness and nervousness and other patients to eat. and neurasthenia and other patients to eat.