Agrinews24 কৃষির সাথে, কৃষকের পাশে
[STUDY ON THE IMPACT VIUSID-AQUA AS ANTIVIRAL AND IMMUNE
MODULATOR FOR SUSTAINABLE HEALTH MANAGEMENT AND SEED
PRODUCTION OF PRAWN (Macrobrachium rosenbergii ) IN HATCHERY CAPTIVITY
IN BANGLADESH]
Author: Hiranmoy Bhattacharjee1, Mohammed Tarique Sarker2, Bulent Kukurtcu3
Shrimp and Fish Foundation, Dhaka, Bangladesh;
Scientific Department of Catalysis S.L., Madrid, Spain
e-mail:hiranbsff@gmail.com; bulent@catalysis.es
ABSTRACT:
Influences of the Viusid-aqua, an antiviral and immune modulator product for aquaculture of Catalysis, Spain were tested on hatchery phase of freshwater prawn (Macrobrachium rosenbergii) to specifically find out its impact on water quality, gravid prawns’ rearing, larval survival and growth and on PL transportation were tested. The study was to find out a sustainable practice of prawn hatchery management applying the antiviral and immune stimulant in the system to combat any viral disease and/or to help prevent viral and bacterial disease occurrences resulting improved production of prawn PL in hatcheries. Newly added raring water of trial larvae rearing tanks (LRTs) was treated @10.00 ppm with liquid product followed by a regular treatment @3.00 ppm for old water of hatchery tanks including brood stock tanks and LRTs. Viusid -aqua powder was used in the artemia hatching tanks @15.00 ppm and in the custard feed for larval stages @ 05.00 ppm. Viusid-aqua was not used in the control LRTs. PL transportation water was treated with Viusid-aqua @10 ppm
Findings of Viusid-aqua based trials were compared with a control group of treatments without Viusid in favor of the objectives of the study. Water pH, DO, NH3, NO3 and NO2 level were found to be comparatively more stable and more favorable in VIUSID based trials than that of control tanks. Reduced larval cycle span (22 days instead of 28 days, 5 larval stages ahead in 35 DoCs), higher survival rate (17%), increase PL production (25%; 51,000 pcs/tank of 2.5 MT or 20,400/MT; 20.4PL/liter), increased body length (17.6%), increased body weight (15.0%), more growth rate (15.0%), earlier completion of larval conversion to PL (11 DoCs earlier in trial tanks) revealed much better efficiency and sustainability of using Viusid-aqua in prawn hatchery phase of fresh water prawn. No occurrence of any viral disease, better appetite and feeding efficiency of berried prawns resulting better performances of hatch lings in larval phase in hatchery indicated improved efficiency of the product in preventing diseases and immune stimulation. Reduction of transport mortality of PL during distant transportation is indicative of positive influence of Viusid-aqua reducing transport-stresses of prawn PL.
Key words: M. rosenbergii hatchery, Viusid-aqua, sustainable prawn PL production, Antiviral, Immune modulator
