River crab in-vitro hatching device

Abstract

The invention discloses a river crab in-vitro incubation device, and relates to the technical field of river crab incubation instruments.The river crab in-vitro incubation device comprises bases and aeration pipes, a nutrient solution box is of a rectangular structure, the two bases are symmetrically welded to the left side and the right side of the bottom of the nutrient solution box, and the four aeration pipes are arranged in the bottom space of the nutrient solution box; a rectangular mounting frame is rotationally mounted at the top end of the inner wall of the left side of the nutrient solution box, four aeration pipes are externally connected with an external oxygen source, the four aeration pipes are located at the bottom of the incubation basket for aeration, so that nutrient dissolved oxygen can be increased, and crab eggs in the incubation basket can float through rising of aeration bubbles; the crab eggs can fully absorb dissolved oxygen to facilitate incubation and growth; two electric push rods are symmetrically locked and supported in the middles of the top ends of the two bases; and a rectangular material receiving disc is mounted on the mounting frame in an inserted manner. The hatching basket can be automatically overturned, unloaded and reset, and the trouble that according to a traditional hatching device, an egg containing device needs to be manually operated for unloading and manual reset is solved.

Description

technical field [0001] The invention relates to the technical field of crab hatching equipment, in particular to an in vitro hatching device for river crabs. Background technique [0002] There is no nutrient input and output relationship between the fertilized eggs of river crabs and oviposit crabs. Oviposit crabs provide sufficient dissolved oxygen for the development of fertilized eggs by constantly inciting the navel and swinging appendages to complete the embryonic development of river crabs. Oviposit crabs have incomplete steps and weakened vigor, which leads to a decrease in dissolved oxygen and affects the hatching rate of fertilized eggs. Oviposit crabs die, resulting in hypoxia of fertilized eggs, directly causing death. Since oviposit crabs only provide dissolved oxygen to fertilized eggs, fertilized eggs can be completely stripped from incomplete or dead oviposit crabs during production, so an in vitro incubation device for river crab fertilized eggs will be use...

AI Technical Summary

Problems solved by technology

[0003] Existing river crab hatching equipment, when unloading the crab roe that has been initially hatched and formed, most of them need to manually turn over the hatching container that holds the crab roe to reverse the discharge. It is also necessary to manually push the holding container of crab roe to the receiving position to implement normal unloading. Such cumbersome operation steps are cumbersome and inconvenient to use. In addition, although some devices do not need to manually load the hatching container and holding container operation, but most of them are driven by matching drive motors, which will cause a large amount of motor consumption, which is not conducive to the overall weight reduction and cost reduction of the device

Images