Effect of White Feces Syndrome on survivals and yields of Shrimp Litopenaeus vannamei culture systems in Nellore coast
Author(s):
N Narendra Babu, Ch. Venkatrayulu
Keywords:
Litopenaeus vannamei, WFS, Survivals, Yields, Production cost, Profit margin
Abstract
There is regular threat of several diseases all over the world since beginning and the disease impact is increasing year on year, in this context the present study has been made on production estimation and their economic loss correlated with disease impacts in the Nellore coastal zone of shrimp farming, especially on the White Feces Syndrome (WFS). In order to estimate the effect of White Feces Syndrome (WFS) on survival and total yields of shrimp in culture systems in Nellore coast, in the present study culture ponds are selected to observe WFS impact on survivals, total yields and cost of production in two different areas Eswaravaka (S1) and Pallamparthi (S2) coastal villages in the Nellore coast. The salinity ranging between 5 to 6 ppt in S1 and 16 to 25 ppt in S2 shrimp farming sites. The changes in plankton density and water quality parameters are observed prior to onset of WFS symptoms. WFS observed in the initial stages of culture at 37 and 43 DOC with poor feeding and survival loss after symptoms of disease during the culture upto104 to 116 days harvest. The maximum survival was recorded as 65% (S1) and 62% (S2) and the yield confined to 3795 kg/ha and 4108 kg/ha respectively in the culture ponds, Feed Conversion Ratio (FCR) is 1:1.5 for S1 and 1:1.6 for S2 shrimp farming sites.
Article Details
Unique Paper ID: 157819

Publication Volume & Issue: Volume 9, Issue 8

Page(s): 92 - 97
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