What are the main technical measures for polyculture of fish and soft-shelled turtles?

I. Pond renovation: Build a 30 cm high escape-prevention wall around the pond, with the four corners rounded into arcs, smooth the inner wall with cement, and it is best to have an inverted-L-shaped coping on top of the wall to prevent the old soft-shelled turtles from escaping. Set up bamboo rafts in the fish pond as sunning platforms for the old soft-shelled turtles to bask their backs, and there is no need to add other necessary equipment such as feeding platforms.

II. Reasonable stocking: filter-feeding fish that feed on plankton, omnivorous fish, and herbivorous fish can all be polycultured in the same pond with old soft-shelled turtles, but black carp should not be stocked in fish-turtle polyculture ponds.

III. Reasonable stocking density of old soft-shelled turtles. If the main approach is to use the natural biological bait in the pond, part of animal bait such as snails, clams, and mussel meat can be appropriately added, and 50-100 turtle juveniles of 200-250 g can be stocked per mu of water surface, producing 20-40 kg of commercial turtles. If the main approach is to feed turtle feed, then 250-350 turtle juveniles of 200-250 g can be stocked per mu of water surface, producing 100-150 kg of commercial turtles.

IV. Strengthen feeding management. In daily aquaculture management, corresponding management measures should be taken according to the biological characteristics of the old soft-shelled turtles and in combination with the biological characteristics of the mixed@#@233@#@species. For example, old soft-shelled turtles like quietness and are afraid of disturbance. In order to promote the feeding and growth of the old soft-shelled turtles, we should keep the surrounding environment quiet, especially reducing the number of times the net is pulled.