Feed fat composition

A technology of feed and oil, applied in the field of nutritional regulation of aquatic animals, to achieve the effects of promoting healthy fish farming, reducing mortality, and increasing phagocytic activity

Inactive Publication Date: 2019-11-15
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is also easy to cause frequent occurrence of tilapia streptococcosis, and the mortality rate of the diseased fish is as high as 60%-100%.

Method used

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Experimental program
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Effect test

preparation example Construction

[0027] In the present invention, the source of the fish oil and puffer fish liver oil is not particularly limited, and conventional commercially available products can be used. In the present invention, the preparation method of the puffer fish liver oil preferably includes: collecting fresh puffer fish liver tissue, placing it in a freeze dryer, and freezing and extracting at -40°C for 48 hours, when the oil yield is 65% and the oil is yellow , collect fugu liver oil. In the present invention, the collected puffer fish liver oil is preferably placed in refrigerated storage at 4°C. In the present invention, the fugu liver oil contains C16:0 and C18:1, the contents of which are 21.049% and 29.111% respectively, which help to promote the infiltration of macrophages, enhance the respiratory burst and phagocytic activity of macrophages, and Make macrophages produce a large amount of inflammatory factors IL-1β and TNF-α, and enhance the stress regulation ability of fish after stre...

Embodiment approach

[0034] A set of feed oil addition and its implementation method for improving the respiratory burst and phagocytic activity of head kidney macrophages after Streptococcus tilapia infection include the following steps:

[0035] Step 1, preparation of basal ration and feed: 200 g of Gifu tilapia were selected, and 4 groups of rations and feed (protein level of 29%) without added oil feed were prepared. Select 12 experimental ponds of 1 mu, place 2000 tilapias in each experimental pond, and set 3 parallel groups in each experimental group;

[0036] Step 2, the composition and ratio of oil and fat feed.

[0037] The first group: the fat composition includes: fish oil, puffer fish liver oil and soybean oil, by weight, every 1g of fat feed contains 0.2g of fish oil, 0.3g of puffer fish liver oil, and 0.5g of soybean oil;

[0038] The second group: oil composition includes: fish oil. In parts by weight, every 1g of feed oil contains 1g of fish oil;

[0039] The third group: oil co...

Embodiment 2

[0054] A set of feed oil addition and its implementation method for improving the respiratory burst and phagocytic activity of head kidney macrophages after Streptococcus tilapia infection include the following steps:

[0055] Step 1. Before the arrival of the high temperature season, six 2-mu tilapia culture ponds in Gaozhou, Maoming, Guangdong were selected for one-month immunity promotion. The size of the experimental fish is about 400g. It has been cultured for 90 days, and the stocking density is 2500 fish / mu.

[0056] The 2nd step, experimental group 1: continue to throw something and feed commercial fish feed of tilapia, protein content 28%, fat is 6%, wherein, comprise fish oil 0.5g and soybean oil 0.5g in every 1g feed fat; Experimental group 2: remove Except for oil and fat, the composition of other feeds remained unchanged, and 1 g of feed fat contained fish oil, puffer fish liver oil and soybean oil. In parts by weight, every 1g of feed fat contains 0.2g of fish o...

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Abstract

The invention provides a feed fat composition, and belongs to the technical field of nutrient adjustment and control of aquatic animals. The feed fat composition comprises a basic ration feed and a fat feed, wherein the mass ratio of the basic ration feed to the fat feed is 100 to (6-8), each gram of the feed contains 0.2-0.3g of fish oil, 0.2-0.4g of ballonfish liver oil and 0.4-0.5g of vegetableoil. According to the feed fat composition provided by the invention, the respiratory burst and the phagocytic activity of macrophages of a fish body can be effectively improved, streptococcus is swallowed, the mortality rate after streptococcal infection is reduced, and healthy aquaculture of fish is promoted.

Description

technical field [0001] The invention belongs to the technical field of nutritional regulation and control of aquatic animals, and in particular relates to a feed oil combination. Background technique [0002] In 2018, the global tilapia production reached 6.2 million tons. As the largest tilapia farming country, China produced 1.75 million tons in 2018. In the past four years, the aquaculture output of tilapia in China has remained at more than 1.6 million tons. [0003] The most troublesome thing in tilapia farming is streptococcal disease. This disease not only has a high mortality rate, but also has a very fast infection and death rate. There is no effective treatment drug, and it has become a devil in tilapia farming. From June to September every year, when the water temperature is higher than 30°C, tilapia feed and grow vigorously at this stage. But it is also easy to cause frequent outbreaks of tilapia streptococcosis, and the mortality rate of the diseased fish is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K50/80A23K20/158
CPCA23K50/80A23K20/158Y02A40/818
Inventor 强俊何杰徐跑陶易凡包景文朱昊俊曹哲明
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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