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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51074

Title: Modulation of the innate immune system in white shrimp Litopenaeus vannamei following long-term low salinity exposure.
Authors: Yong-Chin Lin
Jiann-Chu Chen
Chang-Che Li
Wan Zabidii W. Morni
Awangku Shahrir N. A. Suhaili
Yi-Hsuan Kuo
Yu-Hsuan Chang
Li-Li Chen
Wen-Ching Tsui
Yu-Yuan Chen
Chien-Lun Huang
Contributors: 國立臺灣海洋大學:海洋生物研究所
Date: 2012-08
Issue Date: 2018-11-09T06:36:09Z
Publisher: Fish and Shellfish Immunology
Abstract: Abstract: Immune parameters, haemocyte lifespan, and gene expressions of lipopolysaccharide and β-glucan-binding protein (LGBP), peroxinectin (PX), integrin β, and α2-macroglobulin (α2-M) were examined in white shrimp Litopenaeus vannamei juveniles (0.48 ± 0.05 g) which had been reared at different salinity levels of 2.5‰, 5‰, 15‰, 25‰, and 35‰ for 24 weeks. All shrimp survived during the first 6 weeks. The survival rate of shrimp reared at 2.5‰ and 5‰ was much lower (30%) than that of shrimp reared at 15‰, 25‰, and 35‰ (76%~86%) after 24 weeks. Shrimp reared at 25% grew faster. Shrimp reared at 2.5‰ and 5‰ showed lower hyaline cells (HCs), granular cells (GCs), phenoloxidase activity (PO) activity, respiratory bursts (RBs), superoxide dismutase (SOD) activity, and lysozyme activity, but showed a longer haemocyte lifespan, and higher expressions of LGBP, PX, integrin β, and α2-M. In another experiment, shrimp which had been reared at different salinity levels for 24 weeks were challenged with Vibrio alginolyticus (6 × 10(6) cfu shrimp(-1)), and WSSV (10(3) copies shrimp(-1)) and then released to their respective seawater. At 96-144 h, cumulative mortalities of shrimp reared at 2.5‰ and 5‰ were significantly higher than those of shrimp reared at 15‰, 25‰, and 35‰. It was concluded that following long-term exposure to 2.5‰ and 5‰ seawater, white shrimp juveniles exhibited decreased resistance against a pathogen due to reductions in immune parameters. Increases in the haemocyte lifespan and gene expressions of LGBP, integrin β, PX, and α2-M indicated that shrimp had the ability to expend extra energy to modulate the innate immune system to prevent further perturbations at low salinity levels.
Relation: 33(2) pp.324-331
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51074
Appears in Collections:[海洋生物研究所] 期刊論文

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