Northeast crawfish breeding and breeding methods
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The crayfish used for breeding should be selected from sexually mature individuals with robust physique, complete limbs, and a body length of more than 7 cm, among which females account for approximately 60%, males approximately 30%, and male to female ratio approximately 2:1. Stocking densities per square 40-50 meters. The Northeastern crayfish mating season is generally in mid-April, and it will hold eggs in large quantities in the late of the year, and the amount of eggs will be 70-350 grains/tail, with an average of 100 grains per tail. When the broodstock is stocked for 50 days or so, there will be hatching of juvenile shrimp. After hatching, the juvenile shrimp will all be attached to the maternal abdomen, and the growth stage of the juvenile will be completed under the protection of the mother. Under natural conditions, Northeastern crayfish hi habitat in the body of water, water dissolved oxygen content, transparency, water quality fresh water. According to the habitat of northeast crawfish, artificial breeding and crawfish culture should be part of the pool water every day, while injecting new water, so that the formation of micro-flow, in order to regulate water quality, keep the water fresh, pool water depth should be 30-50 cm should. In rivers and ponds, Northeastern crayfish prefer to inhabit at the bottom of the bed or at the bottom of the pond, between shallow boulders or under the roots. In order to meet the environmental requirements for the habitat and reproduction of Northeastern crawfish, aquaculture ponds should be covered with a layer of 4-5 cm pebbles, crushed brick tiles, etc., and a small number of branches should be laid around the pool. Artificially cultivated northeast clams can adopt two feeding methods: First, polyculture of mixed fish, aquatic animals, and aquatic grasses to feed crayfish naturally. The second is to feed mixed feeds, which can be fed daily according to 5% of the total weight of the rearing shrimps, and fed once every morning and afternoon. The juveniles that leave the mother's body, when the temperature is adequate (20 °C - 30 °C) in the case of adequate feed, usually within 100-120 days of the product specifications.