Feed for improving formation and survival of soft-shell crabs, and processing method of feed

Abstract

The invention discloses a feed for improving the formation and survival of soft-shell crabs. The feed is made of the following raw materials in parts by weight: 30-50 parts of fish meal, 5-15 parts ofgelatin, 20-30 parts of corn starch, 1-5 parts of fish oil, 1-5 parts of soybean oil, 0.5-1.5 parts of lecithin, 1-5 parts of a food attractant, 0.1-1 part of cholesterol, 2-6 parts of a vitamin mixture, 2-6 parts of a powder mixture, 0.1-1 part of choline chloride, 5-10 parts of cellulose, 1-3 parts of sodium carboxymethyl cellulose, and 20-30 parts of starch. The feed of the invention can shorten a molting cycle of Scylla paramamosain, and improves a survival rate of soft-shell crabs. When the feed is used to feed Scylla paramamosain, the molting cycle of Scylla paramamosain can be shortened by 3-5 d, a catch rate of soft-shell crabs is increased from 0.3% obtained by feeding a traditional feed to 12%, the catch rate of soft-shell crabs is increased by 40 times or more, and a culture survival rate of the obtained soft-shell crabs reaches 90% or more.

Description

technical field [0001] The invention belongs to the technical field of aquaculture feed, and in particular relates to a feed for improving the production and survival of soft-shell crabs and a processing method thereof. Background technique [0002] The hairy crabs, blue crabs, swimming crabs, etc. currently on the market are basically hard-shell crabs. As the name suggests, they are characterized by their hard shells. It is very troublesome for inexperienced people to eat this kind of crab, and even use the "crab eight pieces" of the crab eating tool. Because it takes too much time to eat crabs, people's interest in eating crabs is greatly reduced, and most people choose to give up the crab meat at many crab feet, resulting in a waste of resources. The genus Scylla belongs to the class Crustacea, order Decapoda, suborder Brachyura, and family Portunidae. Distributed in sea areas such as Southeast Asia, Australia, Japan, India, and South Africa, and in coastal waters of Zh...

AI Technical Summary

Problems solved by technology

This patent application mainly focuses on the growth and development of crabs. Its impact on crab shelling has not been quantified. Vitamin D and cholesterol are the prerequisite substances for peeling hormones. They have not obtained the optimum ratio for crab shelling. The natural growth is fast and the shelling is fast, the protein feed is not high-quality and the fattening effect of the fat feed is not strong

[0006] At present, when the feed for soft-shell crabs is used to breed crabs, the number of soft-shell crabs produced is low, and the survival rate of the produced soft-shell crabs is low. In addition, the existing feed for soft-shell crabs is dried during the process of processing raw materials into finished products. Several steps such as crushing will cause the loss of part of the active ingredients of the raw materials and reduce the nutritional value of the feed.

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