Better feeding frequencies for P.vannamei.......

Hello everyone:

            Most of the farmers doing different feeding frequencies in their farm. Is it working? What are the advantages, disadvantages in changing feeding and feeding frequency for vannamei... We will see in detail. 

Shrimp digestion:

            Vannamei has short intestine and the digestion process also held fast. Most of the omnivore and carnivore species have short intestine compared to herbivore species. It also takes less than 3 hrs for digestion. The food materials passes via oesophagus and get into stomach (Foregut - Midgut - Hindgut).The digestion started in stomach and most of the nutrients absorbed into hepatopancreas and other regions. 

Common thought :

            Most of the farmers thought that the more frequency of feed increases the growth of the shrimp. But it is not fully true.. 

* Shrimp roam more in the night time comparing to daytime. 

* The increasing the frequency of feed will increase the secretion of more enzymes for digestion and absorption and leads to imbalance production of enzymes. If shrimp fed with more frequency of feed in daytime then it use more energy at the night time for physical activities. 

Enzymatic activity:

      Researchers analysis the best feeding frequency for vannamei.. 

1- Shrimp fed with more frequency in daytime have secreting more amylase enzymes at night time. 

              

2- Shrimp fed with less frequency (2-3 times) secretes less amylase enzymes at night time. 

  * This amylase enzymes is  used to breakdown the carbohydrates. This enzyme secretion denotes more energy spending at night time. This states more physical energy spending on night time by giving more feeding frequency. 

Better results:

        Feeding shrimp with 2,3 and 4 meals per day shows good results in survival, FCR, water quality.... 

But... If your pond has affected with any disease or if you want to boost your shrimp health, that time you can give extra functional feed to the shrimp. 

There is no significant change in growth for the shrimp which is fed with more frequency of feeding. 

Main disadvantages:

      If you increasing the feeding frequency then you have to increase the gut health of the shrimp. Otherwise more feeding will affects gut health and leads to gut related disease. 

     Improper pond environment with pathogenic bacterial population - results in gut related disease. 

     

We have to focus on........ PRIMARY PRODUCTIVITY of the pond. 

Earlier DOC - Shrimp must be fed with high nutritional feed and Planktons. The maintenance of zooplankton will leads to good culture. Grow out with 2-4 frequencies is better for shrimp. 

Is night feeding working? 

        Most of the researches tells night feeding is not successful in earthern systems. Because various water quality, behaviour of shrimp will plays important barrier during night feeding. We will see in next blog. 

                       Thank you🙏.