Info about aquaculture. Spending time restless

Hello everyone:         Today we will see about some of the interesting facts about selenium in shrimp.         Selenium is an important trace mineral which required for shrimp growth.          Optimum level required for vannamei is about 0.35-0.38 mg per kg of feed.  Important functions:        It plays an important role in the function of structural components.          It plays as a cofactor to form glutathione peroxidase and plays role in protecting biological membranes.          Low level of selenium in feed reduces growth and induce oxidative stress to the animal.  Excess selenium also causes toxic effects due to excessive synthesis of seleno-sulfur amino acids.  This amino acids may negatively affects the antioxidant enzymes functions. Plant meal:        If your diet have excess amount of plant meal nutritional source, then it may lowers bioavailability of trace elements in shrimp body.          Those phytic or phytate strongly chelate to essential minerals and made

Hello everyone:          Today we will see about importance of functional feed supplements in shrimp farming.  Risk factors:      There are several risk factors associated in growth of shrimp. Easy susceptible to pathogens due to improper management, poor quality PL are the some of several risk factors in shrimp farming.       Feed supplements:        Various functional feed supplements are recommended for the better growth and performance of shrimp in early growth phase. The common supplements includes vitamin C and E which is essential vitamins which is not secreted by shrimp body. These supplements plays important role in increasing antioxidant activity, immune response, production of reactive oxygen species etc...        These supplements are must need in shrimp pond at certain stages particularly in nursery management.  Beta-glucan :       It is an another important compound which gives positive results on growth and immune response of the shrimp. When you are increa

Hello everyone: Have you heard about this?  Sudden death of fish at overnight after rain. It happened in many places. It is due to presence of acid sulphate soils . The toxicity which is produced under aerobic condition and diffusion from soil to water then cause sudden death of fish.  Acid sulphate soils:        These types of soils present in the regions of wetlands. Excess accumulation of organic sediments in bottom soil causes pyrite formation. Mostly occurs in mangrove areas and other wetlands . The root system in mangroves accumulates more organic matter.      It also formed in the area with more anaerobic condition.  Before that, we have to know about different forms of iron.  Iron generally present in Ferrous iron in anaerobic condition, when it is oxidized then changed into ferric iron and precipitates as a ferric hydroxides.  In acid sulphate soils, sulphate gets reduced to sulphide and oxidation of sulphide to sulphur.  What is present in acid -  sulp