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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26640

Title: Administration of hot-water extract of brown seaweed Sargassum duplicatum via immersion and injection enhances the immune resistance of white shrimp Litopenaeus vannamei
Authors: Su-Tuen Yeh;Chiu-Sha Lee;Jiann-Chu Chen
Contributors: NTOU:Department of Aquaculture
國立臺灣海洋大學:水產養殖學系
Keywords: Litopenaeus vannamei;Vibrio alginolyticus;Hot-water extract of Sargassum duplicatum;Immersion;Injection;Total haemocyte count;Phenoloxidase;Respiratory burst;Phagocytic activity;Clearance efficiency
Date: 2006-03
Issue Date: 2011-10-21T02:18:08Z
Publisher: Fish & Shellfish Immunology
Abstract: Abstract:The total haemocyte count (THC), phenoloxidase activity, and respiratory burst were examined when the white shrimp Litopenaeus vannamei (10.42±1.39 g) were immersed in seawater (34‰) containing hot-water extract of brown alga Sargassum duplicatum at 100, 300 and 500 mg l−1, or injected with hot-water extract of S. duplicatum at 2, 6, 10 and 20 μg g−1. These parameters increased significantly when the shrimp were immersed in seawater containing hot-water extract at 300 and 500 mg l−1 after 1 h, or when the shrimp were injected with hot-water extract at 10 and 20 μg g−1 after 1 day. L. vannamei that were injected with hot-water extract at 6, 10 and 20 μg g−1 had increased phagocytic activity and clearance efficiency to V. alginolyticus after 1–6 days. In another experiment, L. vannamei which had been immersed in seawater containing hot-water extract at 100, 300 and 500 mg l−1, or injected with hot-water extract at 2, 6, 10 or 20 μg g−1 were challenged with V. alginolyticus at 1×106, or 1.4×106 colony-forming units (cfu) shrimp−1, and then placed in seawater. The survival of shrimp that received hot-water extract at either dose was significantly higher than that of control shrimp after 2 days, as well as at the termination of the experiment (6 days after the challenge). It is therefore concluded that L. vannamei that were immersed in hot-water extract of S. duplicatum at 300 mg l−1, or the shrimp that were injected with hot-water extract at 10 μg g−1 or less had increased immune ability as well as resistance to V. alginolyticus infection.
Relation: 20(3), pp.332-345
URI: http://ntour.ntou.edu.tw/handle/987654321/26640
Appears in Collections:[應用地球科學研究所] 期刊論文
[水產養殖學系] 期刊論文

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