Broiler Selection Tips

Crayfish sexual maturation takes 9 to 12 months. The time for selecting broodstock is usually from September to October in the previous year or from March to April in the same year. It should be taken directly from the cultured crayfish pond or natural waters. The water time should not exceed 2 hours. The proportion of males and females varies depending on the breeding method, and is generally 2 to 3:1.

Select the standard color dark red or black red, shiny, smooth surface without attachments. Large individuals, male and female body weight should be 30 to 50 grams, preferably the male individual is greater than the female individual. Both hen and male broodstock require complete attachments, no damage, robust physique, and strong mobility. If broodstock is to be selected from the market, in addition to the above requirements, the source of the crayfish, the time it takes to leave the water body, and the mode of transport should be detailed. Because such crayfish on the market are treated with splashing water by shrimp dealers, they are live outside, but the internal damage is heavy, and they easily die after launching.

Identification of male and female crayfish dioecious, male and female individuals are very obvious external features, easy to distinguish. Females of the same age are larger than those of males. Mature males have large chewing claws. There is a bright red soft palate on both sides of the chelipa. The chewing feet of females are relatively small, and most of them have no red soft palate, even if they are colored. Too light. Male and female first and second abdominal feet evolved into white, calcareous tubular transfer devices; female first abdominal foot was degraded and second abdominal foot was pinnate. The gonads of the male were open at the base of the fifth pair of thoracic feet, but the gonads of the females were opened at the base of the third pair of thoracic feet, and a pair of dark red round holes were evident.

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