What is the difference between carp and chub?

Carp: Some places call carp拐了,carp子. Fish body long, side flat and waist round, dorsal fins slightly raised, there are two pairs of whiskers, the back is gray-black, the abdomen is white, the lower part of the side of the color is nearly golden yellow, the male caudal fin is orange.

Carp is widely distributed, mostly inhabiting the rivers, lakes, reservoirs, ponds and marshes of the soft bottom and grassy places, but also the most and fastest reproduction of a fish. After reproduction in the spring, a large number of food intake, often underwater with the mouth to turn the mud for food, flooded with blisters, river mud and debris, the mouth is particularly developed. Its food composition changes as it grows, juvenile fish to eat plankton as the main, after the body length of 20 millimeters to eat small benthic invertebrates; adult fish to eat benthic animals as the main, but also eat water plants and algae, is omnivorous. Carp has various differences due to different places of origin, such as Western Carp, South China Carp, Sea Carp, Yuanjiang Carp, Tuan Carp, etc. In addition, artificially cultivated carps include Mirror Carp, Mirror Carp and Tuan Carp. In addition, there are also artificially bred mirror carp, red carp, pond carp, and purse carp. Carp age of maturity, in the Yangtze River, Yellow River Basin, the general adult fish for two winter age, the north is later, spawning requirements of the water temperature above 18 ℃, so every year to four, after May, carp feeding began to active.

Chub (Hypophthalmichthysmolitrix) is also known as chub, chub. The body is laterally compressed, with a greenish gray back and white sides and belly. The head is larger. Eyes are positioned low. Scales are fine. The median angular rib of the abdomen extends from just below the pectoral fins straight to the anus. Pectoral fins do not extend beyond the base of the ventral fins. Each fin is grayish. The chub is impatient and a good jumper. It lives in the middle and upper layers of the water column. (Figure 1-6)

The silver carp is a typical filter-feeding fish, mainly eating zooplankton in the fry stage, up to 1.5 centimeters or more gradually turned to eat phytoplankton, but also ate soybean milk, soya bean dregs powder, bran and rice bran, etc., and more like to eat artificial micro-granular with feed. It is suitable for breeding in fertilized water. The length of the intestinal tube is about 6-10 times of the body length.

The age of sexual maturity of silver carp is 1-2 years earlier than that of grass carp. Mature individuals are also smaller, generally more than 3 kilograms of females can reach maturity. 5 kilograms of females relative egg carrying capacity of about 40,000-50,000 / kg body weight, absolute egg carrying capacity of 200,000-250,000 grains. Egg floatation. The spawning period is the same as that of grass carp. In recent years, it has been found that the silver carp cultured in the mainland have degeneration phenomenon, mainly small individuals, maturity is also advanced, so attention should be paid to the introduction of the origin of the seed, purification and restoration.

The silver carp is also a large fish that can weigh 30-40 kilograms in natural rivers. Under pool culture conditions, the age 1 fish can reach 0.8 kilograms or less if there is enough bait. It is better to have a weight of 1.5-2 kilograms for the food commercial chub that is suitable for the market.