Effect of biofloc on the survival of whiteleg shrimp Penaeus vannamei Boone 1931 when challenged with a pathogenic strain of Vibrio parahaemolyticus the causative agent of acute hepatopancreatic necrosis disease (AHPND)

Shinn A. P., . and Griffiths D., . and Sumon T., . and Pokharatsiri A., . and Burana P., . and Decamp O., . and Tongmee C., . and Galli L., . and Jiravanichpaisal J., . Effect of biofloc on the survival of whiteleg shrimp Penaeus vannamei Boone 1931 when challenged with a pathogenic strain of Vibrio parahaemolyticus the causative agent of acute hepatopancreatic necrosis disease (AHPND). pp. 210-225. ISSN 0116-6514

To understand better the effect of different water conditions on the survival of whiteleg shrimp Penaeus vannamei when challenged with a pathogenic strain of Vibrio parahaemolyticus (VPAHPND) a series of challenge trials with biofloc were conducted. Challenges investigated the effect of holding individual shrimp for short periods (5“10 days) in either biofloc or in clear water prior to exposure to VPAHPND in either biofloc or in filtered biofloc. Shrimp reared and challenged in unfiltered biofloc had the lowest mortality rates (0 and 6.7 ; P 0.05) followed by those held in clear water for 10 days and challenged in clear water (33.3 and 20 ; P 0.05). Shrimp reared in unfiltered biofloc and but challenged in clear water had the highest rates of mortality (80 and 60 ). A second validation trial included the use of filtered biofloc. Shrimp reared and challenged in unfiltered biofloc had the lowest rate of mortality (13.3 ) followed by those reared in biofloc but challenged in 2 m-filtered biofloc (20 ). The highest mortality was in shrimp reared in biofloc but challenged in clear water (73.3 ; P 0.01). The results demonstrate that biofloc can protect whiteleg shrimp from VPAHPND and that the management of biofloc in aquaculture ponds can assist in controlling bacterial infections.

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Abstract

To understand better the effect of different water conditions on the survival of whiteleg shrimp Penaeus vannamei when challenged with a pathogenic strain of Vibrio parahaemolyticus (VPAHPND) a series of challenge trials with biofloc were conducted. Challenges investigated the effect of holding individual shrimp for short periods (5“10 days) in either biofloc or in clear water prior to exposure to VPAHPND in either biofloc or in filtered biofloc. Shrimp reared and challenged in unfiltered biofloc had the lowest mortality rates (0 and 6.7 ; P 0.05) followed by those held in clear water for 10 days and challenged in clear water (33.3 and 20 ; P 0.05). Shrimp reared in unfiltered biofloc and but challenged in clear water had the highest rates of mortality (80 and 60 ). A second validation trial included the use of filtered biofloc. Shrimp reared and challenged in unfiltered biofloc had the lowest rate of mortality (13.3 ) followed by those reared in biofloc but challenged in 2 m-filtered biofloc (20 ). The highest mortality was in shrimp reared in biofloc but challenged in clear water (73.3 ; P 0.01). The results demonstrate that biofloc can protect whiteleg shrimp from VPAHPND and that the management of biofloc in aquaculture ponds can assist in controlling bacterial infections.

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Item Type:	Article
AGROVOC Term:	Prawns and shrimps
AGROVOC Term:	Penaeus vannamei
AGROVOC Term:	Penaeus
AGROVOC Term:	Shellfish culture
AGROVOC Term:	Crustacean culture
AGROVOC Term:	Disease control
AGROVOC Term:	Infection
AGROVOC Term:	Vibrio parahaemolyticus
AGROVOC Term:	Mortality
AGROVOC Term:	Survival
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/7985

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