The invention discloses a large-size
seawater fry factory-like grading cultivation
system, and relates to the technical field of
aquaculture. The
system comprises a first-stage culture pond, a second-stage culture pond and a third-stage culture pond. The first-stage culture pond is connected with the second-stage culture pond through a conveying pipeline, and the second-stage culture pond is arranged in the third-stage pond. The first-stage tank is provided with an independent first circulating water filtering device and a monitoring unit, and the second-stage tank and the third-stage tank share a second circulating water filtering and monitoring unit. Each monitoring unit integrates growth detection, environment regulation and control and
disease early warning functions. The first-stage pond is used for cultivating newly hatched larvae, and the larvae are automatically transferred to the second-stage pond through a conveying pipeline when developing to a
juvenile fish stage; the second-stage pond and the third-stage pond jointly form a
polyculture environment, and when the
juvenile fish reaches the target specification, a cage door is opened, and the
juvenile fish is transferred into the third-stage pond. According to the
system, through grading environment control and an automatic
transfer mechanism, efficient breeding of fish fries from
larva fish to large-scale fish fries is achieved, and the problems of uneven growth, low sorting efficiency and the like in traditional fish fry breeding are solved.