جستجوی مقالات مرتبط با کلیدواژه « white leg shrimp » در نشریات گروه « زیست شناسی »

The present study was performed in order to use the seaweed of the Persian Gulf (brown algae Cystoseira trinodis) and also the extraction of fucoidan polysaccharide as an immunostimulant supplementation to improve and enhance some immune parameters of vannamei shrimp. Therefore, 500 shrimp with average weight of 8g were divided into four treatments in triplicate (12 tanks) in a completely randomized design and were fed with diets containing 0, 0.1, 0.2 and 0.4% of fucoidan for 30 days. Results showed a significant effect of fucoidan treatments on the measured parameters (P<0.05). The immune parameters including the number of hyaline, granular and total homocyte cells, superoxide anion, phenoloxidase, superoxide dismutase, catalase and glutathione peroxidase activities in the groups fed with diets containing different levels of fucoidan, especially 0.4% indicated a significant increase compared to the control (P<0.05), while the amount of malondialdehyde showed a significant decrease compared to the control (P<0.05). In general, according to the results of the present study, it can be stated that fucoidan extracted from brown algae Cystoseira trinodis had better performance on improve immune parameters. Therefore, this bioactive compound can be recommended as an immunostimulant in the diet of white leg shrimp.

This study was carried out to determine the influence of highly unsaturated fatty acid (EPA, DHA) enriched Artemianauplii on growth and survival of postlarvae of Litopeneausvannamei(PL-1 to PL-15) in Persian Gulf and Oman sea ecology research center of Bandar Abbas. A complete randomized design with 5 treatments and 3 replicates using15 tanks containing 20 liters water each was chosen. The Artemianaupliiwere enriched with (0 to 4%) cod liver oil (treatments A to E) and the larvae were fed 6 times per day at 4 hours intervals. The postlarvae of treatment D which fed with Artemianauplii, 3% of enrichment significantly increased compared to other treatments (p<0.05).The highest survival rate regarding treatment E postlarvae which fed with Artemianauplii, 4% enrichment However with treatment D (3%) and C (2%) no significant difference (p>0.05) was found. The postlarvae of treatment control (A) which was fed with Artemianauplii that it was not enriched, had the lowest growth and survival rate.The present study demonstrated that the highly unsaturated fatty acid enriched Artemianaupliihas positive effect on enhancement of growth performance and survival rate of white leg shrimp postlarvae.