This species is originally distributed in the Aral Sea, Black Sea, Caspian Sea, and the Baltic seawater rivers and lakes in Europe. It is distributed only in Xinjiang's Yili River and Irtysh River systems in China. It has strong resistance to disease, fast growth, tender meat, less intermuscular punctures, and high nutritional value. Its protein content exceeds 20.53%, higher than carp, and its 5 fresh amino acid content is also higher than that of rainbow trout. The effect of eating is obviously better than that of squid, which is called "king of freshwater fish".
First, the morphological characteristics. The shuttle body is thick and fleshy, with a spindle-shaped body, a small head, a pointed tip, an anterior mouth, and a small gap between the mouth. The maxillary and mandibular teeth have caries and canines, and the axillary part has a sharp beak. The dorsal fin is longer and is divided into two parts, the caudal fin is a bifurcated positive tail. The pelvic fins are slightly behind the pectoral fins in the chest. The body of the shuttlecock is light yellow, with a pale yellow, yellowish-white or light-cyan tone on the abdomen. On the sides of the body are roughly 8-12 irregular black pigment spots on the sides of the body.
Second, living habits. Sagittarius is living in an environment where the water is fresh, the body is transparent, the oxygen is high and there is micro-flowing water. The pH of the water body is required to be between 7.4-8.2. Saki is a cold-water fish with a suitable temperature range of 0-33°C and an optimal growth temperature of 12-18°C. The fish in the lower and middle layers of the scorpionfish are more active in the deeper water layer, and they quickly sneak into the bottom of the water. In addition, the shuttlecock also has the habit of nocturnal, usually after the evening out for food.
Sauron is a fierce carnivorous fish. In the natural waters, small muck fish and shrimp are used for food. The type of food they eat is related to their environment and the shape and size of the fish. The opening bait of squid larvae is rotifers, invertebrate larvae, and the like, and as it grows, it migrates to large zooplankton and benthic organisms, such as large apes, otters, etc., and when they reach 2.5 cm or more, they can feed shrimp. The fry seedlings that are hungry in fry can swallow their own 2/3 fry. When the food is not enough, it also devours its similar weak fish.
Third, age and growth. The growth of sowfish is related to the living environment such as water temperature. The water quality is fresh, the food is abundant and palatability, and the shuttlecock grows fast. Under the condition that the artificially-cultivated bait is sufficient, the mandarin fish seedlings can grow to 700-1000 grams of listed commercial specifications in the current year.
Fourth, breeding habits. The sex age of S. barbara is 3-5 years old in females and 2-4 in males. It matures when it is 1 year old in Guangdong. The lower limit of reproduction water temperature is 7°C, the upper limit is 20°C, and the optimum water temperature is 12-18°C. Saki is a one-time spawning fish. In natural waters, during the breeding season, the male and female broilers choose suitable ecological environment, use fins and body to build roots, gravel, etc., into an ovary that is twice the length of the body, and then drive the mature females into the brood nest for breeding. . The eggs of the fertilized eggs are pale yellow and sticky, and the egg diameter is 1.1-1.6 mm. After the females lay their eggs, the males lay their nests. Males use fins to move the water to increase dissolved oxygen and remove silt, and to drive out the mixed fish near the fish nests until they are hatched. The ovulation amount of female broodstock weighing 2-3 kilograms is 300,000 to 400,000 capsules. Sauer's breeding habits are basically the same as in California.
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