There are male and female chub, with females having a short, rounded body shape and males being longer and thinner. The age of sexual maturity of silver carp is 1-2 years earlier than that of grass carp. The mature individuals are also smaller, generally more than 3 kg of female fish can reach maturity. 5 kg of female fish relative egg carrying capacity of about 4-5 million / kg body weight, absolute egg carrying capacity of 20-25 million.

Egg floatation. The spawning period is similar to that of grass carp. Can weigh 30-40 kilograms in natural rivers. Under pool culture conditions, age 1 fish can reach up to 0.8 kilograms or less if there is enough bait.

Expanded Information

The body color of the chub is generally silver-white, with grayish-white fins, and the head is smaller, accounting for about 1/4 of the advocate; its pectoral fins extend outward, with the tips of the pectoral fins reaching only to the base of the ventral fins; and the sharp ribs of the abdomen run across the entire ventral surface in front of and behind the ventral fins.

The body shape is laterally compressed, slightly high, and fusiform, with a greenish-gray dorsal surface and white sides and abdomen. The head is large. The eyes are positioned very low. Scales are minute. Median abdominal angular ribs extend from below the pectoral fins straight to the anus. Pectoral fins do not extend beyond the base of the ventral fins. Each fin is grayish. Morphology is similar to that of the bighead carp, which is impatient and a good jumper. It grows fast, has fewer diseases, and has a high yield, and is often mixed with grass carp and carp.

Baidu Encyclopedia - Hypophthalmichthys nobilis