Prophylactic properties of biofloc- or Nile tilapia-conditioned water against Vibrio parahaemolyticus infection of whiteleg shrimp (Penaeus vannamei)

Abstract

Research highlights: 1. Whiteleg shrimp Penaeus vannamei were bath challenged with Vibrio parahaemolyticus and shrimp had significantly greater survival in biofloc than clear seawater during 96 h post-challenge. 2. Shrimp stocking density (1 to 5 shrimp per 400 mL) did not influence survival of shrimp bath challenged with V. parahaemolyticus in either biofloc or clear seawater conditions. 3. Survival of shrimp bath challenged with V. parahaemolyticus was significantly greater in Nile tilapia-conditioned water prepared at 5 ppt and 10 ppt compared to at 15 ppt and in clear seawater at 5, 10 and 15 ppt. 4. Biofloc and Nile tilapia-conditioned water may protect against acute hepatopancreas necrosis disease (AHPND), and these are inexpensive potential disease management control strategies that could be adopted by the shrimp industry. Statement of relevance: Managed biofloc and Nile tilapia-conditioned water culture conditions can reduce whiteleg shrimp losses due to Vibrio parahaemolyticus (134 characters with spaces)

Evaluation of Nile tilapia in monoculture and polyculture with giant freshwater prawn in biofloc technology system and in recirculation aquaculture system

“…The results of the present study are similar to those obtained by Azim and Little (2008), for MM (12%); however, the value for PB was higher (38%) than the ones found in this study (23%). These variations may occur because the composition of the bioflocs are related to several factors, such as the source of carbon added to the growth development of some microbial communities, diets, animals and different sampling periods (Lobato et al 2019;Sajali et al 2019).…”

Acute Hepatopancreatic Necrosis Disease (AHPND): Virulence, Pathogenesis and Mitigation Strategies in Shrimp Aquaculture

“…For instance, in situ utilization of microbial flocs in biofloc system by aquaculture organism as well as the utilization of processed biofloc as a feed ingredient has been reported to improve growth performance and the health of shrimp [ 161 , 162 , 163 , 164 , 165 , 166 ]. There are few reports that have illustrated the role of biofloc in stimulating the non-specific immunity and resistance of shrimp against microbial pathogens including AHPND V. parahaemolyticus [ 167 , 168 ]. Hostin et al (2019) designed an experiment to investigate the effect of autotrophic (with or without probiotics) and heterotrophic bioflocs (with or without probiotics) on L. vannamei against AHPND bacterial strain.…”

Los sistemas biofloc: una estrategia eficiente en la producción acuícola

“…En general los Bioflocs son excelentes materias primas para la alimentación de animales, por ser ricos en proteínas y lípidos naturales, por lo que se catalogan como "Alimento natural in situ", y al mismo tiempo como "Control biológico de residuos" al controlar los desechos de los peces y mejorar la calidad del agua 10,42 ; por ello, varios autores han trabajado en el uso del Biofloc como suplemento alimenticio en especies acuáticas; la harina de Biofloc se ha trabajado como sustituto de la harina de pescado y de la harina de soya en alimento para especies acuáticas; encontrando buenos resultados productivos en camarones, mojarras y carpas 49 , evidenciando incluso buen crecimiento de la mojarra en (SB) cuando se disminuyó el porcentaje de proteína en su alimento comercial 49,62,70 . Otras investigaciones realizadas en carpas y camarones confirmaron estos hallazgos, concluyendo que el Biofloc podía ser utilizado como suplemento alimenticio, haciendo inclusión en dietas hasta en un 30%, con lo cual se evidenciaba un efecto positivo sobre la actividad enzimática digestiva de los animales y por ende mejores rendimientos de crecimiento 85,95 .…”