Ulva lactuca-containing forage for lutianus stellatus Akazaki and preparation method thereof

A technology of spot snapper and feed, which is applied in the field of spot snapper feed and its preparation, to achieve the effects of active feeding, high digestion and absorption rate, and comprehensive nutrition

Inactive Publication Date: 2014-07-30
SHANTOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, Ulva is a marine algae that is very suitable for highly industrialized development and has great

Method used

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  • Ulva lactuca-containing forage for lutianus stellatus Akazaki and preparation method thereof
  • Ulva lactuca-containing forage for lutianus stellatus Akazaki and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In order to detect the most suitable addition amount of Ulva, 0 (control), 5%, 10%, 15%, and 20% of Ulva dry powder were added to replace fish meal or other plant protein sources to make compound feed for spot snappers. The feed formula is as shown in Table 1 (values ​​are percent by weight), and the preparation steps are as follows:

[0025] ①Collect fresh Ulva, clean it, remove impurities, and dehydrate it with a centrifugal dehydrator. The speed of the centrifugal dehydrator is 3000-5000 rpm, and the centrifugal dehydration is 3-10 minutes.

[0026] ②Preparation of Ulva powder: put the dehydrated Ulva in a drying oven for drying, set the drying temperature to 70-85°C, and set the drying time to 4-5 hours, and control the moisture content of the dried Ulva to 10-15 %, and then crushed to 80-120 mesh with a pulverizer, and set aside.

[0027] ③Mixing: according to the feed formula shown in Table 1, crush the bulk protein source raw materials and sugar source raw mater...

Embodiment 2

[0032] In order to obtain the best feed formula for star snapper containing Ulva, on the basis of Ulva content of 5%, the ratio of raw materials and auxiliary materials was adjusted to make different star snapper compound feeds. The feed formula is shown in Table 2 Shown (values ​​are percent by weight), the preparation steps are the same as in Example 1.

[0033]

[0034] Table 1

[0035]

[0036] Note: a. Tapioca starch is a commercially available product and can be purchased from the domestic raw material market;

[0037] b. The fish meal is American fish meal, with a crude protein content of 68% and a fish oil content of 9.4%;

[0038] c. Ulva powder protein content is 16.5%, crude fat content is 0.88%, crude fiber content is 6.89%, ash content is 21.89%; amino acid content (g / 100g, dry weight) is: threonine (Thr) * 0.64, valeric acid amino acid (Vla)* 0.98, methionine (Met)* 0.22, isoleucine (Ile)* 0.61, leucine (Leu)* 1.32, phenylalanine (Phe)* 0.83, lysine (Lys) ...

Embodiment 3

[0043]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.

[0044] group Ⅰ（0） Ⅱ（5%） Ⅲ（10%） Ⅳ（15%） Ⅴ（20%） Initial average weight (g) 11.83±0.10 11.17±0.69 11.89±0.39 11.67±0.19 12.07±0.02 Final average weight (g) 24.24±0.47 d 27.75±0.18 a 26.35±0.33 b 26.70±0.29 c 25.87±0.34 c Weight gain (%) 1.11±0.09 b 1.50±0.15 a 1.22±0.06 b 1.29±0.05 ab 1.14±0.03 b SGR 1.19±0.04 c 1.52±0.10 a 1.32±0.05 ...

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Abstract

The invention relates to a forage for lutianus stellatus Akazaki and a preparation method thereof. The forage comprises a protein-source raw material, a fat-source raw material, a sugar-source raw material and auxiliary materials, and is characterized by also comprising 5% by weight of ulva lactuca powder. The protein-resource raw material is fish meal; the fat-source raw material is selected from fish oil, soybean oil and mixture thereof; the sugar-source raw material is cassava starch; and the auxiliary materials is selected from composite vitamins, mixed mineral substances, microcrystalline cellulose, soybean phospholipid powder, DL-methionine, calcium dihydrogen phosphate, choline, ascorbic acid, squid paste and mixture thereof. The forage is composed of, in percent by weight, 41.71-42.24% of crude protein, 8.67-8.81% of crude fat, and the balance carbohydrates, crude fiber, ash and water. The forage for lutianus stellatus Akazaki helps lutianus stellatus Akazaki to have relatively high weight gain rate and survival rate, the usage amount of fish meal can be reduced, and the protein demand level of fingerlings is reduced.

Description

technical field [0001] The invention relates to the field of fish feed, in particular to a feed for snappers containing Ulva and a preparation method thereof. [0002] Background technique [0003] 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 hi...

Claims

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Application Information

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IPC IPC(8): A23K1/18A23K1/14A23K20/105A23K20/142A23K20/147A23K20/158A23K20/163A23K20/174A23K50/80
CPCY02A40/818
Inventor 温小波朱大世李升康李文嘉
Owner SHANTOU UNIV
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