How Are Crayfish Farming Costs Calculated? A Detailed Breakdown of the Calculation Method

Broodstock cost: 58 yuan/jin, totaling 6960 yuan; site rent: 700 yuan/mu/year; feed, water and electricity: 2000 yuan; labor cost: 12000 yuan/year/mu; total——21660 yuan.

Farming costs

Broodstock cost: 58 yuan/jin, totaling 6960 yuan

Site rent: 700 yuan/mu/year

Feed, water and electricity: 2000 yuan

Labor cost: 12000 yuan/year/mu

Total——21660 yuan

Now suppose 120 jin of broodstock are stocked per mu, with 20 crayfish per jin, so 120 jin means 2400 crayfish, with a male-to-female ratio of 1:1. Because there is transport loss, assume a survival rate of 95%, that is, 2280 crayfish.

The number of juvenile crayfish produced per year by female crayfish is 1140 * 2 times each/mu * 200 each/time = 45.6/mu/year. The survival rate of broodstock from spawning to growing into juvenile crayfish is 8%—30%. Calculated at 8%, the total annual output of adult crayfish is: 456,000/year×8%=36480/mu/year.

They can be marketed 2—3 months after spawning. When each adult crayfish grows to 50 grams (about 10 per jin), the annual output per mu is 6480/mu/year÷12 per jin=3040 jin/mu/year. Now assume the market price of crayfish is 10 yuan per jin. Excluding costs, one mu can earn 30,400 yuan, and 20 mu of crayfish can earn 608,000 yuan. This is still a conservative estimate; the actual situation may be more.