Benthic diatom cultivation pool and method for polyculture of sea cucumber and sea urchin seedlings using the pool

Abstract

The invention discloses a benthic diatom culture pond. The benthic diatom culture pond comprises a pond body and is characterized in that fine sand with a particle size range of 0.1mm-0.3mm is paved on the pond bottom of the pond body, and the paving thickness is 0.5cm-1cm; a plurality of mutually-parallel main ropes are further arranged at the pond bottom of the pond body, the space between each main rope and the pond bottom is 1.5cm-2cm, and the main ropes are parallel to the length direction or width direction of the pond body; a plurality of radial adhesion bases are distributed on the main ropes at equal intervals, and the space between every two adjacent radial adhesion bases on the same rope is 15cm; and each radial adhesion base is formed by mutually bundling multiple piece-shaped nylon ropes with widths of 0.2cm-0.5cm, the bundling points of all the nylon ropes are located on the main ropes, the lengths of the nylon ropes are 40cm-60cm, each radial adhesion base contains 40-60 nylon ropes, and the space between every two adjacent nylon ropes is 20cm-40cm. The invention further discloses a method for mixed culture of larvae of stichopus japonicus and sea urchin by virtue of the benthic diatom culture pond.

Description

Technical field [0001] The invention relates to a cultivation pond for artificial breeding of aquatic products, and a method for polyculture of sea cucumber and sea urchin seedlings by using the pond. Background technique [0002] Apostichopus japonicus and sea urchin are both important marine aquaculture species in my country, and research on artificial seed of both has been carried out for many years. Studies have shown that in the late stage of seedling production, that is, the seedling cultivation period, benthic diatoms as bait can promote the growth of sea cucumbers and sea urchins. However, the current seedling cultivation, especially the seedling technology of sea cucumbers, does not deliberately use benthic diatoms in the bait, but feeds algae grinding fluid, sea mud, compound feed, etc. as bait. On the one hand, it is difficult to obtain benthic diatoms in a sustainable and large amount. On the other hand, the current seedling cultivation technology and supporting faci...

AI Technical Summary

Problems solved by technology

However, in the current seedling cultivation, especially in the seedling technology of sea cucumber, benthic diatoms are not deliberately used in the bait, but algae grinding liquid, sea mud, compound feed, etc. are fed as bait. On the one hand, it is difficult to obtain benthic diatoms sustainably and in large quantities; on the other hand, the current seedling cultivation technology and supporting facilities do not meet the basic conditions for cultivating benthic diatoms (deep water in nursery ponds, shading and darkness in workshops) )

Although attention was paid to using benthic diatoms as bait during the cultivation of sea urchin seedlings, the existing benthic diatom supply facilities, that is, the corrugated plates on which benthic diatoms were pre-cultivated, had the disadvantage of weak light transmission, which led to Once the benthic diatoms in most areas are ingested by sea urchins, it is difficult to re-grow, so that the sea urchins lack bait. When the size is small, they are stripped to the cages and fed with Ulva as bait. The nutrition is insufficient, and the growth is greatly affected. influences

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