Scientific Program

Day 1 :

  • Immune Response
Location: London ,UK
Biography:

Abstract:

This study was conducted to investigate the effects of different levels of a water-soluble polysaccharide extract from brown algae, Padina australis (WPP) on growth, antioxidant enzymes activities and nonspecific immune responses of shrimp, Litopenaeus vannamei . Three replicate groups of shrimp (1 ± 0.1g) were fed four isonitrogenous and isolipidic diets containing four levels, 0 or control, 0.5, 1.0, and 1.5 g kg-1 of WPP for 8 weeks. Results show that the diet containing 1.0 g kg-1 of WPP had a significant positive effect on growth performance of shrimp. In addition, the activities of antioxidant enzymes including superoxide dismutase, glutathione peroxidase, catalase and malondialdehyde improved by feeding 0.5 and 1 g kg-1 of WPP. Also, the lysozyme and phenoloxidase activities in those of shrimp fed 0.5 and 1 g kg-1 of WPP were significantly higher than those fed control and 1.5 g kg-1 WPP. These results suggested that the use of 1.0 g kg-1 of water-soluble polysaccharides of P. australis can be beneficial for growth, antioxidant and nonspecific immune of L. vannamei.

 

Keywords: Water-soluble polysaccharides, Padina australis, Litopenaeus vannamei, Antioxidant enzyme and Immune response.

Dr Paria Akbary

Department of Marine Sciences, Chabahar Maritime University, Fisheries group, Chabahar, Iran

Title: Effect of dietary supplementation of Chlorella vulgaris on growth, antioxidant defense and immune status of grey mullet, Mugil cephalus
Biography:

Abstract:

The objective of the study was to examine the effects of dietary supplementation of Chlorella vulgaris powder (CP) on growth, antioxidant enzyme activity, immune responses of juvenile Mugil cephalus. Fish (15 ± 0.1g) were fed diets enriched with 0 (control), 5, 10 and 15 g CP per kg feed for 8 weeks. After the feeding trial, fish were challenged against pathogenic bacteria (Photobacterium damselae) infection to evaluate disease resistance of infected fish. Fish growth performance was significantly improved with increasing CP levels at CP10 and CP15. Antioxidant-stimulated activity was observed with dietary CP where total antioxidant capacities (TAC), superoxide dismutase (SOD) and glutathione (GSH) increased, while malondialdehyde (MDA) decreased significantly in fish fed CP. Furthermore, serum lysozyme activity of fish fed three levels of CP was significantly higher than control group. In addition, CP supplementation at 10 and 15 g dose induced kidney phagocytic and respiratory burst activity which was maximized at 15 g CP. Meanwhile, feeding 10 and 15 g of CP diets decreased mortality in M. cephalus after challenge with P. damselae.

 

Keywords: Chlorella vulgaris. Mugil cephalus . Antioxidant enzyme . Immune response.

 

Biography:

Abstract:

This study was conducted to investigate the effects of different levels of water-soluble polysaccharide extract from brown algae, Padina australis (WPP) on growth, antioxidant enzymes activities and nonspecific immune responses of shrimp, Litopenaeus vannamei .Three replicate groups of shrimp (1 ± 0.1g) were fed four isonitrogenous and isolipidic diets containing four levels, 0 or control, 0.5, 1.0, and 1.5 g kg-1 of WPP for 8 weeks. Results show that the diet containing 1.0 g kg-1 of WPP had significant positive effect on growth performance of shrimp. In addition, the activities of antioxidant enzymes including superoxide dismutase, glutathione peroxidase, catalase and malondialdehyde improved by feeding 0.5 and 1 g kg-1 of WPP. Also, the lysozyme and phenoloxidase activities in those of shrimp fed 0.5 and 1 g kg-1 of WPP were significantly higher than those fed control and 1.5 g kg-1 WPP. These results suggested that the use of 1.0 g kg-1 of water-soluble polysaccharides of P. australis can be beneficial for growth, antioxidant and nonspecific immune of L. vannamei.