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- Title
Sargassum polycystum polysaccharide extract improved immunological responses and enhanced resistance of Penaeus monodon against Vibrio harveyi infection.
- Authors
Victoriano-Blancia, Precious L.; Mameloco, Emelyn Joy G.; Cadiz, Rowena E.; Traifalgar, Rex Ferdinand M.
- Abstract
The present study evaluated the influence of acidic polysaccharide extracted from Sargassum polycystum (SAPE) on growth, immunological responses and resistance to Vibrio harveyi infection of juvenile Penaeus monodon. Five experimental diets supplemented with 100, 500, 1000 and 1500 mg/kg SAPE including a control (0 mg/kg) were formulated and fed to juvenile P. monodon for 50 days. Following the feeding trial growth indices including weight gain and specific growth rate were significantly enhanced, (P < 0.05), in treatment groups fed with diets containing 2000 mg/kg SAPE. Highest survival (46.67±11.54%, P < 0.05) following the infection challenge test with the pathogenic V. harveyi was observed in the treatment group receiving the 2000 mg/kg SAPE supplementation while all shrimp died in the group receiving the control diet. The enhanced resistance to bacterial infection of SAPE treatment groups was further supported by improved immune responses (P < 0.05) including total hemocyte counts and serum antibacterial activities. The present study indicates that dietary supplementation of acidic polysaccharide extracted from Sargassum polycystum at a dose of 2000 mg/kg could enhance growth performance, elevate immune responses and significantly improve resistance of juvenile P. monodon against V. harveyi infection.
- Subjects
PENAEUS monodon; VIBRIO infections; VIBRIO harveyi; POLYSACCHARIDES; FISH feeds; SARGASSUM; DRUG resistance in bacteria
- Publication
International Aquatic Research, 2022, Vol 14, Issue 3, p181
- ISSN
2008-4935
- Publication type
Academic Journal
- DOI
10.22034/IAR.2022.1955424.1257