Age of fish: The mature age of fish is approximately: age of carp 2, age of carp 3, age of grass carp 5–6, age of carp 6–7, age of carp 1. Male and female sex differences in sexual maturation age is relatively large, male sex than normal in females is about to advance 1 age.
Weight: The first-time mature female body weight: 1 kg of carp, 4-6 kg of white peony, 6-7 kg of grass carp, 12-16 kg of herring, and about 0.2 kg of carp. The body weight of males when they are sexually mature is generally less than that of females when they are sexually mature.
Sex ratio: The sex ratio of male and female fingerlings is 1:1 to 1:1.5. According to the number of seedlings to determine the matching population of fish.
Set sex: The identification of male and female fish is mainly based on secondary sexual characteristics. Such as: male grass carp pectoral fin in front of a few rays with star tracking, pectoral fins narrower and longer, more than half of the distance between the base of the pectoral fin to the basal fin, abdomen scales smaller and sharp; and female grass carp without tracking, short chest ray, abdomen scales Big and round. The male and female fish have abdominal ray rays, a star-chasing star on the lid, and a rough feel in the hands, while the females are opposite. The white mullet of the male whitefish has caries, while the female has no caries or caries, and its row is shorter than the male. Male squids have knife teeth in front of the pectoral fins and females have no teeth. Male pectoral fins are larger and longer than females.
Physique: The selected species of fish on the basis of ensuring that the parents have the typical characteristics of the species, and the relative distance between the species, also requires that the fish shape is robust, plump, colorful, no injury, no pests, and strong vitality.
Weight: The first-time mature female body weight: 1 kg of carp, 4-6 kg of white peony, 6-7 kg of grass carp, 12-16 kg of herring, and about 0.2 kg of carp. The body weight of males when they are sexually mature is generally less than that of females when they are sexually mature.
Sex ratio: The sex ratio of male and female fingerlings is 1:1 to 1:1.5. According to the number of seedlings to determine the matching population of fish.
Set sex: The identification of male and female fish is mainly based on secondary sexual characteristics. Such as: male grass carp pectoral fin in front of a few rays with star tracking, pectoral fins narrower and longer, more than half of the distance between the base of the pectoral fin to the basal fin, abdomen scales smaller and sharp; and female grass carp without tracking, short chest ray, abdomen scales Big and round. The male and female fish have abdominal ray rays, a star-chasing star on the lid, and a rough feel in the hands, while the females are opposite. The white mullet of the male whitefish has caries, while the female has no caries or caries, and its row is shorter than the male. Male squids have knife teeth in front of the pectoral fins and females have no teeth. Male pectoral fins are larger and longer than females.
Physique: The selected species of fish on the basis of ensuring that the parents have the typical characteristics of the species, and the relative distance between the species, also requires that the fish shape is robust, plump, colorful, no injury, no pests, and strong vitality.
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