Is periphyton based shrimp farming helps to reduce turbidity?

Hello everyone:

                   Today we will see one of the interesting topic about periphyton. Did you heard the word periphyton? Had you seen that? 

    Yes, it is present in your pond. It is a group of organism like algae, planktons, some of autotrophic and heterotrophic microorganisms, protozoa, fungi.... 

What is the problem? 

             I think, nowadays most of the shrimp ponds facing the turbidity problem. It may be due to aging of ponds or due to improper strengthening. Anyway sometimes it is unavaoidable. We are using continues aeration in shrimp ponds. 

    We have to strengthen our pond dikes at regular interval to prevent the erosion. 

            We know that, shrimp mostly prefers microinvertebrates, zooplanktons. Periphyton community also a very good food source. The species composition in this colony may varies from place, nutrient availability, selection of cultured species etc.. 

          The periphyton grows well in a submerged substrates. Many natural substrates based farming going on. On that, bamboo is mostly preferred natural substrate for periphyton. The bamboo is splitted and submerged in water, after that periphyton community attached on substrates and grows. 

Is it working? 

           In many researches found that, periphyton based finfish farming working very good. There are different genera of planktons present in the periphyton community. In carp and tilapia farming, we can increase the production rate by periphyton farming. But we have to use fertilizer to maintain the growth of periphyton. 

Nutrients requirements. 

          Nitrogen and phosphorus are the important nutrients which is required for the growth of periphyton mass. They can easily traps nutrients from the water. They traps suspended solids in water. 

          Combination of supplementaion feed and substrates based periphyton with finfish shows 30-50% of increased production than normal. 

Come to vannamei.... 

       It is a important species which is cultured all over the world. Turbidity is the main problem. If we increase the depth of water than we have to increase the aeration and especially in summer there is chance for formation of stratification layer in water. 

        In certain researches, periphyton food gives better strength to the animal and increases the survival rate and increases the growth. 

       If we placed substrates in the pond, then it will be a good place for Nitrifiers. Comparing to the normal conditions, Nitrifiers works effectively on substrates. It purify the water at the extend. We are using high protein feed, so nitrogen formation also high. So it forms good nutrients source for periphyton. 

Prevents cannibalism:

       In periphyton based culture, it serves natural food to the shrimps and also provides shelter for shrimp which prevents cannibalism of animal. 

      In average turbid ponds, periphyton can effectively traps solid and purifies the water. In some researches, there is an increases production of vannamei in substrates based periphyton farming with supplement feeding. These all indicates there is better scope present in that culture. 

    And also we can reduce the probiotic use in aquaculture ponds., with the help of periphyton... 

   If we optimize and standardize this technique, then it is good for the increased production on turbid ponds. 

Why nitrifiers acts very active in presence of substrates? Will see in next blog. 

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