Efficient outdoor ecological pond artificial fry breeding method for lutjanus argentimaculatus

Abstract

The invention provides an efficient outdoor ecological pond artificial fry breeding method for lutjanus argentimaculatus. The method comprises the following steps: (1) arranging a pond, and laying volcanic rock, gravel, vermiculite and biological ceramsite on the bottom of the pond; (2) before larva fish eats food, inoculating 60,000-90,000 / mL of thalassiosira, 40,000-60,000 / mL of chlorella and 10,000-30,000 / mL of golden algae into the pond, and after the water quality in the pond is stable, placing the lutjanus argentimaculatus into the pond, wherein the placing density is 20,000-40,000 / mu; (3) after the larva fish eats food, in the larva fish period, feeding the larva fish with oyster larvae every day, and splashing soybean milk in the pond, wherein the density of the oyster larvae is 5-8 / mL; (4) in the juvenile fish period, feeding juvenile fish with rotifers and Moina mongolica daday, wherein the density of the rotifers is 3-5 / mL, the density of the Moina mongolica daday is 50-80 / L, and meanwhile, splashing soybean milk and bean dregs in the pond at the same time; and (5) in the juvenile fish period, feeding the juvenile fish with the rotifers and heliozooid, wherein the density of the rotifers is 8-10 / mL, the density of the heliozooid is 10-25 / mL, and harvesting the lutjanus argentimaculatus after keeping breeding for 20-40 days. The survival rate of harvested lutjanus argentimaculatus fries is high, the specification is large, and variation is reduced.

Description

technical field [0001] The invention relates to the technical field of purple snapper seedling cultivation, in particular to an efficient method for artificial seedling cultivation of purple snapper in an outdoor ecological pond. Background technique [0002] The purple snapper (Lutjanus argentimaculatus) is a large-scale economic fish in the middle and lower layers of warm water shallow seas. It is distributed in the Indian Ocean, the central and western Pacific Ocean. Shallow waters with sandy bottom. According to reports, there are more than 103 species of snappers living in various oceans of the world, most of which are economic species, and the purple snapper is considered to be one of the species with the most economic value and development prospects in this family. Purple snapper is rich in nutrition, delicious, rich in protein, DHA and EPA. It is a high-quality marine fish with a large market demand. There is a large demand for purple snapper, and there is also a l...

AI Technical Summary

Problems solved by technology

There is a large demand for purple snappers, and there is also a large demand for purple snapper fry. However, the existing methods for raising seedlings of purple snappers often have many variations, low survival rates, and the size is not large enough, which is not conducive to the subsequent expansion of purple snapper breeding.

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