Đăng nhập
 
Tìm kiếm nâng cao
 
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí
 

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Bài báo - Tạp chí
(2014) Trang: 99
Tạp chí: 4th International Fisheries Symposium JW Marriot Hotel, Surabaya, Indonesia, October 30-31th, 2014

Most species of brown seaweed (Phaeophyta) get high economic value and a great number of uses, in which products extracted from Sargassum genus have been widely used in different fields such as food, medicine and industry all over the world during years ago. Brown seaweed Sargassum are now being considered to be a rich source of antioxidants and nutrients from the ocean. It has been reported that polysaccharide extracted from Sargassum to be the potential source of andioxidants that used as immunostimulants for aquatic animals health enhancement. Among brown seaweed species, Sargassum microcystum is a common plant which distributes around the coast of Vietnam generally and Mekong Delta (MD) especially. However, this resource has not been utilized intensively in aquaculture in MD. The information on bioactivity of brown seaweed polysaccharde extrates and use of these extracts in aquaculture is limited. Therefore, the aims of this work are to examine the antioxidant activity of polysaccharide extracted from S. microcystum as well as its effect on growth performance of the white shrimp Litopenaeus vannamei.

Fresh S. microcystum was collected from the coast of Kien Giang province, Vietnam. Polysaccharides were extracted by hot-water within 6 hours. Antioxidant activities were evaluated through DPPHã free radicals scavenging activity, ferrous ion chelating activity, and ferric reducing power. For the trial on the white shrimp L. vannamei, one hundred experimental shrimp were held in 500-l tanks, in a recirculating seawater system and fed to satiation over a 8-week growth trial. Four dietary treatments were tested, each with three replicates. Shrimp were fed at different levels of polysaccharide extracts at 0.0 (control), 0.5, 1.0 and 2.0%. Growth was calculated based on the di?erence of the ?nal body weight and initial body weight, and expressed as DWG, SGR. Some crucial water quality parameters such as temperature, pH, dissolved oxygen, alkalinity, NH3, NO2- were tested weekly during experimentation. The results are presenting in the manuscript.

 


Vietnamese | English






 
 
Vui lòng chờ...