The role of yeast hydrolysate in tilapia and shrimp farming

      Yeast hydrolysate has potential applications in tilapia and shrimp farming, and can be used as a feed additive to improve farming efficiency, but it needs to be scientifically used. The following are specific analysis and application suggestions:

1、 Nutritional value and function of yeast hydrolysate

      Yeast hydrolysate is the product of yeast processed by enzymatic hydrolysis, autolysis and other processes, rich in:

      High quality protein and amino acids: containing free amino acids (such as lysine and methionine) and small peptides, easy to digest and absorb, especially suitable for the amino acid needs of aquatic animal larvae.

      Immune active substances: such as β - glucan and nucleotides can enhance immune function, improve stress resistance (such as coping with water quality deterioration and temperature fluctuations), and reduce the risk of diseases in large shrimp (such as South American white shrimp).

      Vitamins and minerals: Rich in B vitamins and trace elements (such as selenium and zinc), it can supplement the nutritional gap of feed, promote the metabolism and growth of tilapia (omnivorous) and prawns.

      Food attractant ingredients: containing taste forming nucleotides (such as IMP, GMP), which can improve feed palatability and increase feeding rate, especially suitable for shrimp that are sensitive to the flavor of the feed.

2、 Application in tilapia farming

1. Applicable scenarios

      Juvenile stage: Promote digestive system development and improve survival rate (tilapia juveniles require 35% -40% protein).
High density farming: enhances immunity and reduces bacterial diseases caused by stress (such as streptococcal disease).

      Cooperate with plant protein sources: replace some fish meal to reduce costs (yeast protein can compensate for the problem of insufficient methionine in soybean meal).

2. Add suggestions

      Proportion: Generally accounting for 1% -3% of the feed formula, it needs to be combined with soybean meal, fish meal, etc. to ensure amino acid balance (such as supplementing methionine premix).

      Effect: Studies have shown that adding 2% yeast hydrolysate can increase the weight gain rate of tilapia by 10% -15% and reduce the feed coefficient (FCR) by 8% -12%.

3、 Application in Shrimp Farming

1. Applicable scenarios

      Shrimp fry cultivation: promotes the development of liver and pancreas, and improves the stress resistance of shrimp fry (such as low salinity or high-density seedling cultivation).

      Adult shrimp farming: enhances intestinal health (nucleotides can repair intestinal mucosa), reduces problems such as enteritis and white stool, especially suitable for species such as South American white shrimp and spotted shrimp.

      Molting period: Supplement minerals such as calcium and magnesium to promote molting synchronicity and reduce the mortality rate of incomplete molting.

2. Add suggestions

      Proportion: During the seedling stage, 3% -5% can be added, and during the adult shrimp stage, 1% -2% can be added. Attention should be paid to the synergistic use with stress resistant ingredients such as astaxanthin and multidimensional.

      Effect: Experiments have shown that adding yeast hydrolysate to shrimp aquaculture ponds can increase survival rates by 15% -20% and average body length by 10% -12%, especially in ponds with poor water quality.

4、 Precautions and optimization strategies

      Choose high-quality products: prioritize enzymatic hydrolysis of yeast hydrolysates (to avoid harmful substances produced by chemical hydrolysis), and detect the content of active ingredients such as β - glucan (≥ 5%) and nucleotides (≥ 2%).

      Balanced amino acids: Yeast methionine content is low, and tilapia feed needs to be supplemented with additional methionine (recommended dosage of 0.1% -0.3%). Shrimp feed can be paired with fish meal or squid paste.

      Cost control: Yeast hydrolysate is usually priced higher than soybean meal and can partially replace fish meal (with a substitution ratio of 20% -30%), reducing the overall cost of high protein feed.

      Paired with other additives: Used in combination with probiotics (such as Bacillus subtilis) and organic acids (such as Clostridium butyricum) to improve gut microbiota and enhance synergistic effects.

      Small scale experiment: Conduct a comparative experiment for 1-2 months before breeding to monitor indicators such as growth rate, survival rate, and feed cost, optimize the formula, and then promote it.

5、 Summary

      Yeast hydrolysate can be used as an efficient additive in feed for tilapia and prawns, with both nutritional supplementation and immune enhancement functions, but it needs to be scientifically formulated according to the breeding stage and variety characteristics. It is recommended to collaborate with professional feed companies or technical teams to develop personalized plans based on local raw material costs and breeding models, in order to achieve the best economic benefits.