Feed additive capable of promoting development of ovaries and vitellogenesis of blue crabs and application of feed additive

Abstract

The invention discloses a feed additive capable of promoting the development of ovaries and vitellogenesis of blue crabs and the application of the feed additive. The feed additive is characterized by being prepared through uniformly mixing and compounding the following raw materials in parts by weight: 15-20 parts of DHA ethyl ester oil, 5-10 parts of EPA ethyl ester oil, 10-15 parts of vitamin E acetic ester, 5-10 parts of cholesterol, 5-10 parts of soybean lecithin, 2-5 parts of L-alpha-glycerophosphorylcholine, 1-3 parts of astaxanthin, 1-3 parts of soybean isoflavone, 1-3 parts of lignanoid, 20-25 parts of dried marine algae powder and 10-15 parts of sinonovacula constricta powder. The mass percentage of the additive in released feeds is 0.8-1.0%. The feed additive has the advantages that the survival rate of the blue crabs can be increased by 20-23%, the sexual gland index can be increased by 40-50%, the content of vitellogenin can be increased by 35-45%, the molecule expression quantity of the vitellogenin can be increased by 60-80%, the average weight can be increased by 25-30%, and the breeding yield can be increased by 20-22%.

Description

technical field [0001] The invention relates to a feed additive for portunus trituberculatus, in particular to a feed additive for promoting ovarian development and yolk generation of portunus trituberculatus and an application thereof. Background technique [0002] In the breeding process of portunus trituberculatus, low-value small miscellaneous fish and shellfish are often used for direct feeding. Not only the contradiction between supply and demand of fresh bait is becoming increasingly prominent, but also it is very easy to cause environmental pollution of breeding waters and frequent occurrence of diseases. What is more prominent is that the cultured portunus trituberculatus has poor ovarian development, the color of the crab paste is obviously light (or not red), the muscle and crab paste are poor in plumpness and other quality problems, as well as the number of eggs and the development of offspring are poor. And so on. Vitellogenesis refers to the formation of vario...

AI Technical Summary

Problems solved by technology

[0002] In the breeding process of portunus trituberculatus, low-value small miscellaneous fish and shellfish are often used for direct feeding. Not only is the contradiction between supply and demand of fresh bait increasingly prominent, but it is also very easy to cause environmental pollution in the breeding waters and frequent occurrence of diseases.

At present, there are no relevant research reports on feed additives that promote ovarian development and yolk production in Portunus trituberculatus at home and abroad.

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