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Method for promoting growth and body surface color yellowing of eels

An eel and body surface technology, which is applied in the field of promoting the growth of eel and the yellowing of the body surface color, can solve the problems of high fish meal content and cannot meet the sustainable development of the aquaculture industry, and achieves improving the yellow color of the fish body and enhancing the immune and metabolic capacity, and the effect of reducing dosage

Pending Publication Date: 2022-07-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this patent is that the proportion of fishmeal is high, which cannot meet the sustainable development needs of the aquaculture industry

Method used

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  • Method for promoting growth and body surface color yellowing of eels
  • Method for promoting growth and body surface color yellowing of eels
  • Method for promoting growth and body surface color yellowing of eels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Determination of lutein, total carotenoids and other major nutrients in Chlorella powder:

[0036] Acetone was used as a solvent to extract lutein and total carotenoids in Chlorella powder, and their contents were determined by liquid chromatography; the protein content in Chlorella powder was determined by Kjeldahl method.

[0037] Table 1 Lutein, total carotenoids and other main nutrients of chlorella powder

[0038]

[0039]

[0040] The chlorella powder used in the following examples is the same as this example.

Embodiment 2

[0042] Determination of Chlorella Compound Feed Formula and Chlorella Powder Addition:

[0043]According to the nutritional requirements, raw material characteristics and formula experience during the growth and development of eel, the main raw material composition and the amount of chlorella powder added in the feed formula were determined. Formulated eel compound feed with imported white fish meal, soybean protein concentrate, flour, α-starch, brewer's yeast, methionine, complex multi-dimensional, complex minerals, choline chloride, lecithin, liver powder, squid oil, soybean oil and squid paste Wherein, the described imported white fish meal is made of whole fish such as cod and flounder or leftovers through cooking, fat-lifting, drying, pulverization, etc., and the crude protein content is 65%; Vitamin D3, vitamin E, vitamin K3, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, niacinamide, calcium pantothenate, folic acid, biotin by mass ratio 120:2:60:320:960:80...

Embodiment 3

[0049] Feed processing:

[0050] According to the formula in Table 2 of Example 2, the feed raw materials are weighed and mixed; the mixed materials are firstly coarsely pulverized, and then ultrafinely pulverized; screened with an 80-mesh sieve;

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Abstract

The invention relates to a method for promoting growth and body surface color yellowing of eels, chlorella powder is used in an eel feed to partially replace fish meal, and the prepared chlorella compound feed is used for feeding the eels, so that the growth and body surface color yellowing of the eels are promoted. After eels are fed with the chlorella compound feed for 30-60 days, the weight gain rate of the eels can be increased by 5-25%, the yellow value (b *) of fish bodies can reach 10-30, and the content of xanthophyll in fish skins can reach 1.0-20.0 mu g / g. By adopting the method to culture the eels, the dosage of the fish meal can be reduced, the immunity and metabolic capability of the eels can be enhanced, the growth speed of the eels and the yellow color of the eels can be increased, the nutritive value and commercialization value of the eels can be improved, and the method has a great application prospect.

Description

technical field [0001] The invention belongs to the technical field of fish feed, and in particular relates to a method for promoting the growth of eel and the yellowing of body surface color. Background technique [0002] Eel is a high-grade edible fish with high edible value. Its meat is tender and delicious, and it is deeply loved by consumers. In recent years, the world's eel aquaculture production has shown an increasing trend, and the total output has basically stabilized at about 230,000 tons. China's total eel aquaculture production ranks first in the world, accounting for about 70% of the world's total production. [0003] The development of the global aquaculture industry has led to an increasing demand for fishmeal. However, the global fishmeal resources are limited and the price of fishmeal continues to rise. The development and application of low-fishmeal aquafeed has become the persistent concern and pursuit of the aquafeed industry. Therefore, for the sustai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K50/80A23K10/30A23K10/22A23K20/147A23K20/163A23K20/142A23K20/105A23K20/174A23K20/158A23K10/16A23K20/24
CPCA23K50/80A23K10/30A23K10/22A23K20/147A23K20/163A23K20/142A23K20/105A23K20/174A23K20/158A23K10/16A23K20/30A23K20/24Y02A40/818
Inventor 谢友坪黄凯云陈剑锋马瑞娟
Owner FUZHOU UNIV