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Lutjanus stellatus feed containing Sargassum horneri and preparing method of Lutjanus stellatus feed

A technology for star snapper and feed, which is applied in the field of star snapper feed containing copper algae and its preparation, can solve the problems of low survival rate, unbalanced nutrition and high feed coefficient, achieves reduction of protein demand level, and promotes juvenile growth. The effect of high fish growth, digestion and absorption rate

Inactive Publication Date: 2014-09-10
SHANTOU UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the current large-scale development of spot snapper aquaculture is restricted by two factors. One is that the feed nutrition is not comprehensive, mainly feeding algae, shellfish and fresh miscellaneous fish, etc., and there is no special spot snapper to cooperate with. Feed, resulting in slow growth, and algae, shellfish and fresh miscellaneous fish have disadvantages such as unstable supply, difficult storage, unbalanced nutrition and high feed coefficient, which will inevitably cause huge pollution and damage to the water environment, which is not conducive to the growth of spot snapper. Large-scale breeding production; the second is that the disease is serious and the survival rate is low
Due to the long-term feeding of spot snappers with incomplete feed, the ability of spot snappers to resist diseases is low
However, there is no report on the use of copper algae as feed for spot snappers

Method used

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  • Lutjanus stellatus feed containing Sargassum horneri and preparing method of Lutjanus stellatus feed
  • Lutjanus stellatus feed containing Sargassum horneri and preparing method of Lutjanus stellatus feed
  • Lutjanus stellatus feed containing Sargassum horneri and preparing method of Lutjanus stellatus feed

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In order to detect the most suitable addition amount of copper algae, the dry powder of copper algae added 0 (control), 5%, 10%, 15%, and 20% was used to replace fish meal or other plant protein sources to make compound feed for spot snappers. Feed formula is as shown in table 1 (value is percentage by weight), and preparation steps are as follows:

[0022] ①Collect fresh copper algae, clean them, remove impurities, and dehydrate them with a centrifugal dehydrator. The rotational speed of the centrifugal dehydrator is 3000-5000 rpm, and the centrifugal dehydration takes 3 to 10 minutes.

[0023] ② Preparation of copper algae powder: Put the dehydrated copper algae in a drying oven to dry, the drying temperature is set at 70-85°C, the drying time is set at 4-5 hours, and the moisture content of the dried copper algae is controlled at 10-15 %, and then pulverized to 80-120 mesh with a pulverizer, and set aside.

[0024] ③ Mixing: according to the feed formula shown in Ta...

Embodiment 2

[0028] In order to obtain the best feed formula for spot snapper containing copper algae, on the basis of copper algae content of 5%, the ratio of raw materials and auxiliary materials was adjusted to make different compound feeds for spot snapper. The feed formula is shown in the table Shown in 2 (numerical value is percentage by weight), preparation procedure is the same as embodiment 1.

[0029] Table 1

[0030]

[0031]

[0032] Note: a. Tapioca starch is a commercially available product and can be purchased from the domestic raw material market;

[0033] b. The fish meal is American fish meal, with a crude protein content of 68% and a fish oil content of 9.4%;

[0034] c. The protein content of copper algae powder is 17.6%, the crude fat content is 1.25%, the crude fiber is 8.88%, and the ash is 16.13%; the amino acid content (g / 100g, dry weight) in the copper algae is: threonine (Thr)* 0.68, Valine (Vla)*0.94, Methionine (Met)*0.31, Isoleucine (Ile)*0.77, Leucine...

Embodiment 3

[0040] With the formulated feed prepared in Example 1, about 12 g of spot snappers were raised. Present embodiment is the net cage culture that fish raft is carried out in sea, and culture net cage is 1 * 1 * 1.5m, has cover net, in order to escape and waterfowl. Three parallel experiments were performed in each group, and 30 fish were tested in each parallel experiment. During the breeding period, the temperature was 20-26° C., and the salinity was 27-31 degrees. After 60 days of cultivation, various growth indicators were measured. The results of Example 1 are shown in Table 3.

[0041] table 3

[0042]

[0043] Note: The data are mean ± standard error; SGR: specific growth rate; in peer data, those marked with the same lowercase letters indicate significant differences between each other (P<0.05)

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Abstract

The invention relates to Lutjanus stellatus feed and a preparing method of the Lutjanus stellatus feed. The Lutjanus stellatus feed comprises protein source raw materials, fat source raw materials, sugar source raw materials and auxiliary materials, and is characterized by also comprising 5 weight percent of Sargassum horneri powder, wherein the protein source raw materials are fish meal; the fat source raw materials are selected from fish oil, bean oil and a composition formed by a mixture of the fish oil and the bean oil; the sugar source raw materials are cassava starch; the auxiliary materials are selected from complex vitamins, mixed mineral substances, microcrystalline cellulose, soybean phosphatide powder, DL-methionine, calcium biphosphate, choline chloride, ascorbic acid, sleeve-fish paste and a composition formed by a mixture of the complex vitamins, the mixed mineral substances, the microcrystalline cellulose, the soybean phosphatide powder, the DL-methionine, the calcium biphosphate, the choline chloride, the ascorbic acid and the sleeve-fish paste; and the feed consists of the following nutritional ingredients in percentage by weight: 41.23 to 41.72 percent of crude protein, 8.32 to 8.52 percent of crude fat and the balance being the carbohydrates, crude fiber, ash and water. The Lutjanus stellatus feed has the advantages that the weight increase rate and the survival rate of the Lutjanus stellatus are higher; in addition, the consumption of the fish meal can be reduced; and the protein demand level of fingerlings can be reduced.

Description

technical field [0001] The invention relates to the field of fish feed, in particular to a feed for snappers containing copper algae and a preparation method thereof. Background technique [0002] Spotted snapper (Lutianus stellatus Akazaki) belongs to the snapper family. It grows in the Indian Ocean, the South Pacific, the South China Sea, and the Taiwan Strait. It belongs to tropical and subtropical offshore near-bottom fish. Its delicious meat, high nutritional value and large economic benefits have broad market prospects. However, the large-scale development of spot snapper aquaculture is currently restricted by two factors. One is that the feed nutrition is not comprehensive, mainly feeding algae, shellfish and fresh miscellaneous fish, etc., and there is no special spot snapper to cooperate with. Feed, resulting in slow growth, and algae, shellfish and fresh miscellaneous fish have shortcomings such as unstable supply, difficult storage, nutritional imbalance and high...

Claims

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Application Information

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IPC IPC(8): A23K1/18A23K1/14A23K1/10A23K1/16A23K10/22A23K10/30A23K20/105A23K20/142A23K20/158A23K20/163A23K20/174A23K20/26A23K40/30A23K50/80
CPCY02A40/818
Inventor 温小波朱大世李升康李文嘉
Owner SHANTOU UNIV
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