The Effect of Temperature on Survival Rate of White leg Shrimp (Litopenaeus vannamei) Infected with Infectious Myonecrosis Virus

Za, Irvan Firman Syah and Zaidy, Azam Bachur and Sugama, Ketut and Hasan, Soebhakti and Fitriadi, Ren and Ihtifazhuddin, Muhammad Ikhwan and Srie Rahayu, Sata Yoshida and Mahariawan, I Made Dedi and kamaruddin, K. (2026) The Effect of Temperature on Survival Rate of White leg Shrimp (Litopenaeus vannamei) Infected with Infectious Myonecrosis Virus. World's Veterinary Journal. 32 - 42. ISSN 23224568

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Abstract

Infectious myonecrosis virus (IMNV) is a significant pathogen in shrimp aquaculture, causing high mortality. Environmental factors, particularly temperature fluctuations, are known to trigger IMNV outbreaks. The present study aimed to determine the effects of hyperthermia on the survival rate and incubation period of whiteleg shrimp (Litopenaeus vannamei) infected with IMNV. The present study utilized a completely randomized design with five treatment groups and three replications. Each replication consisted of 15 shrimp, with an average weight of 9.19 ±0.58 grams, reared in 100 L plastic containers filled with seawater at 26 ppt salinity. The treatment groups consisted of shrimp infected with IMNV via intramuscular injection and reared at temperatures of 30°C (S30, positive control group), 31°C (S31), 32°C (S32), and 33°C (S33). Additionally, a negative control group of non-infected shrimp was reared at 30°C (Sk30). The observation period lasted 10 days post-infection. The present results demonstrated that hyperthermia significantly impacted shrimp mortality and viral incubation. The highest survival rate was observed in the control group at 97.78. Among the infected groups, the highest survival rates were recorded in S30 (51.11) and S31 (48.89), whereas the lowest were in S32 (28.89) and S33 (24.44). In the S33 treatment, higher temperatures reduced the incubation period to 2 days, whereas in the S30 treatment, it lasted for 5 days. The current findings indicated that water temperatures of 32°C and 33°C act as environmental stressors, significantly reducing IMNV incubation period and increasing the risk of mortality in Litopenaeus vannamei shrimp. © The Author(s) 2026 Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.

Item Type:	Article
Keywords:	Hyperthermia; Incubation period; Infectious myonecrosis virus; Survival rate
Subjects:	S Agriculture > SF Animal culture
Divisions:	World's Veterinary Journal (WVJ)
Page Range:	32 - 42
Journal or Publication Title:	World's Veterinary Journal
Journal Index:	Scopus
Volume:	16
Number:	1
Publisher:	Scienceline Publication
Identification Number:	https://doi.org/10.54203/scil.2026.wvj3
ISSN:	23224568
Depositing User:	Dr. Alireza Sadeghi
URI:	https://eprints.science-line.com/id/eprint/1735

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