Effects of Partial Replacement of Macroalgae (Sargassum ilicifolium) with Fish Meal on Intestinal Tissue Structure in Asian Seabass (Lates calcarifer)

The effect of replacement brown macroalgae (Sargassum ilicifolium) with fishmeal, intestinal tissue structure of Asian Lates calcarfer, with an initial weight of 29±1 g, in a completely randomized design with 4 treatments and three triplicates for 6 weeks was done. The experimental diets were prepared using a control diet and three diets including brown macroalgae with replacement at level 3, 6 and 9%. The obtained results indicated that there was no significant difference between enterocyte length, villi width and muscle thickness in intestinal tissue between different treatments and the control group (P>0.05). However, replacement of sargassum algae at the level of 6% on the villi length and villi uptake level of intestinal tissue showed a significant difference (P<0.05). According to the results, the use of sargassum macroalgae at the level of 6%, in the diet of Asian seabass, had a positive effect on studied parameters of intestinal tissue.