Sodium alginate from Sargassum wightii retards mortalities in Penaeus monodon postlarvae challenged with white spot syndrome virus

Abstract

Sodium alginate extracted from brown seaweed Sargassum wightii (16.35 ± 1.42%, mean [± SD] yield from 5 extractions) was prepared as a powder or beads and used to enrich Artemia nauplii at concentrations of 100, 200, 300 and 400 mg l −1 . The alginate-enriched nauplii were fed to Penaeus monodon shrimp postlarvae (PL) stage 15 (PL15, i.e. 15 d old) for 20 d. Mean weight gain and specific growth rate over this period were 0.24 g and 15.8%, respectively, in PL groups not fed alginate, and 0.20−0.28 g and 14.7−16.5%, respectively, in PL groups fed alginate. Amongst PL35 then challenged with white spot syndrome virus (WSSV) by immersion, all PL not fed alginate died within 9 d. However, amongst PL fed the 4 concentrations of alginate powder or beads, mortality rates reduced with increasing alginate concentration, and between 25 and 32% PL remained alive when the bioassay was terminated on Day 21. Amongst alginate-fed PL groups compared with the control group, mortality was reduced by 26.5 to 58.4%. Nested PCR detection of WSSV revealed sodium alginate concentration-dependent reductions in infection loads. The data indicate that sodium alginate extracted from brown seaweed and fed to P. monodon can retard progression of WSSV disease.

Replacement of dietary fishmeal with Sargassum ilicifolium meal on growth, innate immunity and immune gene mRNA transcript abundance in Lates calcarifer juveniles

“…is a largely unexploited one, which contains sulphated polysaccharides (e.g. fucoidan and alginate) with immuno‐stimulatory and free radicals quenching characteristics (Immanuel, Sivagnanavelmurugan, Balasubramanian, & Palavesam, 2012). It is also rich in various bioactive compounds such as steroids, alkaloids, phenolic compounds, saponins and flavonoids (Prabu, Sahu, Pal, Dasgupta, & Narendra, 2016; Zubia & Deslandes, 2018).…”

Effect of Sargassum wightii fucoidan on growth and disease resistance to Vibrio parahaemolyticus in Penaeus monodon post-larvae

“…Immanuel et al . () have also investigated the effect of sodium alginate extracted from S. wightii enriched Artemia nauplii reduced the mortality in WSSV challenged P. monodon . Feeding Artemia enriched with hot water extract of Sargassum spp.…”

The effectiveness of methanol extract and fractinations fromleaves of mangroveSonneratia albaand Bruguiera gymnorrhizafor the prevention of white spot syndrome virus (WSSV) infection in black tiger shrimp Penaeus monodon

“…The potency of the herbal ingredients extract for bacterial disease prevention and white spot disease tackling at shrimp rearing has been reported by some researchers (Ahilan et al, 2010;Haq et al, 2011;Banerjee et al, 2012;Immanuel et al, 2012;Sahu et al, 2012;Ghosh & Chakraborty, 2013;Declarador et al, 2014;Maikaeo et al, 2015;Muliani et al, 2015;& Jha et al, 2016).The water fraction of the mangrove Ceriopstagal was effective as anti-WSSV in tiger shrimp (Sudheer et al, 2012.). Further, it mentioned that the survival rate of the tiger prawn fed 1% feeding rate per day with the addition of mangrove C.tagal water fraction as much as 500 mg/body kg/day reached 100% (Sudheer et al, 2011).…”