Ecological co-cultivation method for fishes and Chinese mitten crabs

Abstract

The invention provides an ecological co-cultivation method for fishes and Chinese mitten crabs. The method comprises the following steps: (1) establishing a culture pond: selecting a culture pond withan area of 5-8 mu, wherein the culture pond includes a Chinese mitten crab culture area and a fish culture area, the fish culture area is located at the outer periphery of the Chinese mitten crab culture area, and an isolation net for preventing the Chinese mitten crabs from escaping is arranged between the fish culture area and the Chinese mitten crab culture area; (2) planting plants: plantingzizania aquatica and lotus roots at the bottom of the fish culture area, and planting common duckweeds and trapa bispinosa at the water surface of the fish culture area; and arranging an ecological floating bed on the water surface of the Chinese mitten crab culture area, and arranging Chinese pennisetum alopecuroides on the ecological floating bed; (3) throwing young Chinese mitten crabs and fry:throwing the young Chinese mitten crabs into the Chinese mitten crab culture area, wherein when the young Chinese mitten crabs are thrown, the water temperature is 10-20 DEG C, the breeding density is 400-500 river crabs per mu, and the specification is that every crab is 65-75g; and throwing the fry to the fish culture area, wherein carps are 120-130kg / mu, hypophthalmichthys molitrix is 20-24kg / mu; and (4) performing feeding management: feeding the crabs and the fishes regularly every morning and evening, and feeding the fishes with fish feed, feeding the crabs with crab feed. The method provided by the invention can simultaneously improve the survival rates and yields of the fishes and the crabs.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to an ecological co-cultivation method for fish and crabs. Background technique [0002] In high-density aquaculture ponds, because the oxygen consumption of animals is higher than the oxygen production of microalgae photosynthesis, the phenomenon of hypoxia and floating heads often occurs, especially in the middle of the night and around sunrise. In order to ensure the normal growth of fish, an aerator is required. But for raising crabs (mitriocheir sinensis, also known as river crabs, crabs) ponds, because the stocking density is very low, the output of river crabs in high-yield ponds is only about 100kg, and a large amount of aquatic plants need to be planted in the ponds as shelters for crabs to shell. The amount of oxygen produced by photosynthesis far exceeds the oxygen consumption of crabs, resulting in the oversaturation of dissolved oxygen in the pond, espe...

AI Technical Summary

Problems solved by technology

However, in the existing crab breeding process, only crabs are cultured in the breeding pond, and the organisms are single, which can easily cause water quality to deteriorate, increase the probability of crabs getting sick, and reduce the output of crabs.