Equipment for high-density cultivation of high-quality rare fish fries and construction method

Abstract

The invention belongs to the field of aquaculture, and relates to equipment for high-density cultivation of high-quality rare fish fries and a construction method. The equipment comprises a fry cultivation pool, nano aeration pipes, a filter screen center water outlet pipe and double-path circulating water quality purification systems; the fry cultivation pool is a rounded corner pond or a dead-corner-free polygonal pond; the nano aeration pipes are arranged around the bottom of the inner wall of the fry cultivation pool; the filter screen center water outlet pipe is arranged at the bottom in the fry cultivation pool; the two-path circulating water quality purification systems comprise an upper-layer water quality purification system and a bottom-layer water quality purification system; upper-layer water in the fry cultivation pool is communicated with the interior of the fry cultivation pool through the upper-layer water quality purification system; bottom-layer water in the fry cultivation pool is communicated with the interior of the fry cultivation pool through the filter screen center water outlet pipe and the bottom-layer water quality purification system; and the upper-layer water quality purification system and the bottom-layer water quality purification system are symmetrically arranged at the two sides of the fry cultivation pool. The equipment for high-density cultivation of the high-quality rare fish fries with high growth speed, high survival rate and low malformation rate is provided.

Description

technical field [0001] The invention belongs to the field of aquaculture, and relates to equipment and a construction method for high-density cultivation of famous and precious fish fry. Background technique [0002] Fish seed cultivation has always been a bottleneck that plagues the development of the aquaculture industry at home and abroad (Moorhead, 2014; Slate et al., 2019), especially rare fish, including American shad (American shad, Alosa sapidissima) and American silver grouper (crappie , Pomoxis spp.) The difficulty of raising seedlings is particularly difficult. [0003] Existing seedling raising mainly is pond seedling raising method and cement pool indoor seedling raising method. The method of raising seedlings in ponds is subject to changes in natural weather, sometimes hot and cold, cloudy and sunny, and unpredictable. The fry of rare fish are slender and delicate. The fry period is the most sensitive and critical period for their growth and metamorphosis. Th...

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Problems solved by technology

[0005] Obviously, the existing seedling raising methods cannot provide an excellent and stable growth and development environment due to the lack of professional seedling raising facilities and reliable circulating water purification treatment systems and management methods, and the environment changes during the seedling raising period, and cannot meet the needs of early growth and development. The basic needs of water quality and environment in the stage cause physiological stress response, resulting in slow growth of fry, high deformity rate, low survival rate and low seedling raising efficiency, which limits the development of aquaculture industry

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