Accompanied by the arrival of the peak aquatic season, the incidence of enteritis in various aquatic animals has increased dramatically. For example, the common carp enteritis incidence rate is more than 30%, while the incidence rate of grass carp enteritis can be as high as 50%. Anatomy of the diseased fish can clearly see: thin intestinal wall, intestinal congestion, anal redness and swelling.
The main cause of enteritis in aquatic animals
1. The abundant use of various animal and plant proteins to produce high protein level of feed. The histamine and malondialdehyde, produced from spoilage of animal protein, and the anti-nutritional factors contained in plant protein, are unavoidable and damages the intestinal structure of aquatic animals.
2. The poor digestibility of raw materials not only increases the digestive burden of the intestines, but also increases excreta and destroys the water environment.
3. In order to pursue a faster growth rate, as the water temperature rises, feeding increases, the introduction of harmful factors in feed also increases, and the deterioration of the water environment worsens, threatening the health of the fish.
How to solve the problem of enteritis in aquatic animals?
A large number of research results prove that it is nothing more than internal and external solutions.
EXTERNAL - reduce the harmful factors introduced in the feed
by decreasing the protein level of feed, reducing the total intake of harmful substances, and using the protein source with high digestibility and low anti-nutritional factors .
INTERNAL - use raw materials with active ingredients that may contribute to the repair of structure and function of the intestine, for example,
promote intestinal development and enhance repair of injuries, like reducing the permeability among intestinal cells, enhancing the anti-oxidation or anti-inflammatory capacity of intestinal cells.
The functional protein produced by Mytech company through enzymatic hydrolysis technology not only has the basic characteristics of high digestibility, absorption and utility, low anti-nutritional factors, but also contains a large number of active peptides of small molecular weight. Studies have shown that this series of product can promote the growth and development and repair of the intestinal tract of aquatic animals, and effectively reduce the occurrence of enteritis.Product research and application cases
NO. 1
Research Cooperation Unit: Aquatic Animal Nutrition Laboratory, Sichuan Agricultural University
Research Results has been published on Fish Physiol Biochem (2017), Aquaculture Research (2019)
Research content: Add functional protein produced by Mytech company (EHPP) to the feed and reduce the total protein level of feed by relatively 6% to study the effect of this functional protein on the growth performance, intestinal health of juvenile Jian carp under the premise of reducing formula cost or equivalent formula cost.
Juvenile Jian Carp: 7 groups * 4 duplications * 50 fishes, initial weight 12g, final weight 90g
Diet of control group: 34% CP, 4% EE
Diet of experiment group: 32% CP + 1.0% , 1.5% , 2.0% , 2.5%, 3.0% ETSP
1) Growth performance
The growth performance of group less feed cost shows similar growth performance as control group; the similar cost group shows better growth performance.
2) Intestinal development and damage repair
a. Promote intestinal development
Significantly increased intestinal weight, intestinal body index, anterior/mid/hind intestinal fold height.
Improve the activities of intestinal trypsin, chymotrypsin, lipase and amylase, and promote the digestion and absorption of nutrients.
Improve the activities of intestinal trypsin, chymotrypsin, lipase and amylase, and promote the digestion and absorption of nutrients.
b. Promote the repair of intestinal damage
Reduce the permeability between intestinal cells and reduce the invasion of toxic and harmful substances: the expression of tight junction protein related genes in the fore/mid intestine is significantly increased.
Enhance the anti-inflammatory capacity of intestinal cells: decrease pro-inflammatory factor gene expression and increase anti-inflammatory factor gene expression.
Enhance the antioxidant capacity of intestinal cells (effectively reduce lipid oxidation products (Malondialdehyde) and protein oxidation products (protein carbonyl), and significantly increase intestinal antioxidant enzyme activity).
NO. 2
Research Cooperation Unit: Guangdong Ocean University
Research Content: Under the premise of the same protein level, the functional protein produced by Mytech company (ETSP) was used to investigate its effect on the growth performance and intestinal development of juvenile grouper.
Juvenile grouper: 5 groups * 3 duplications * 30 fishes, initial weight 12g, final weight 56g, total 56day
Diet of control group: commercial feed of 48% CP, 11% EE;
Diet of experiment group: commercial feed + 1.0% , 2.0% , 4.0% , 6.0% ETSP - fish meal (50% of ETSP dosage) - dehulled soybeam meal (50% of ETSP dosage)
(1) Growth performance
4% ETSP increased the growth rate by 5% and decrease FCR by 10%.
(2) Development of the intestine
Improve activities of intestinal trypsin, amylase, lipase, and promote the digestion and absorption of nutrients.
Improve the expression of PepT1, IGF-1, TOR genes, and promote the absorption and deposition of nutrients.
NO. 3
Farm trial: Pilot trial with a feedmill customer
Effect:
(1) Promote intestinal development: improve weight intestine by 20% or above.
a. Channel catfish
Diet: Original feed + 1% ETSP reduce - 1% good quality fish meal, feeding for 1 month
b. Sturgeon
Diet: original diet + 2% ETSP - 2% good quality fish meal, feeding for 1 month
(2) Improve intestinal health
The absolute value of enteritis incidence of sturgeon decreased by 50%.
(3) Growth performance
Sturgeon: growth rate increased by 14%, FCR decreased by 18%.
Functional protein produced with enzymatic hydrolysate process by Mytech company (ETSP)
Promote intestinal growth and development
Enhance repair after intestinal injury
Reduce the occurrence of fish enteritis
Through an appropriate method of use, you can harvest fish with better health, production performance, and profits without increasing the cost of the formula!
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