The evaluation of the effect of density management in Whispovirus White Spot Syndrome Disease outbreak in farmed Vannamei Shrimp (Litopenaeus vannamei Boone,1931) in Gomishan shrimp farm Site, Golestan province.

Document Type : scientific research article

Authors

1 Corresponding Author, Ph.D. Graduate of Aquatics Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

2 Professor, Dept. of Aquatics Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

3 Professor, Dept. of Aquaculture, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

Abstract

White Spot Disease is the main health problem of shrimp farms in Iran, which has caused severe losses in shrimp farms. This research aims to evaluate the epidemic of white spot disease with different stocking densities of western white leg shrimp (Litopenaeus vannamei) during 2018-2022 respectively in densities of (300, 360, 100, 150 and 230 thousand pieces per hectare) in Three farms were implemented in the shrimp farms of the Caspian Kian Pad Company located in the Gomishan shrimp farming site of Golestan province. During the breeding period, water physicochemical parameters were recorded daily. A number of 30 shrimp samples were caught with salic net and shrimps of biometry were measured every 10 days. Sampling of shrimps and possible carriers was done before storage and during the breeding period to perform PCR test to determine the presence or absence of white spot syndrome virus. The results showed that the average weight of shrimps in the farms that were affected by the white spot virus was higher than the farms that were not yet affected, but it was not significant (P = 0.051). But the percentage of survival and the amount of total production in farms that were not affected by the virus were significantly higher than those affected by the virus (P<0.05). Also, in farms with high density the probability of virus epidemic was higher. It seems that in order to prevent the occurrence of white spot disease in Gomishan shrimp breeding site, the maximum density of 150 thousand per hectare is suggested.

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References

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Journal of Utilization and Cultivation of Aquatics
Volume 14, Issue 3
September 2025
Pages 211-232

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