|
Digital Library >
Bộ danh mục tài liệu thư viện - Viện Hải dương học - VNIO library catalogue >
Công bố khoa học ở tạp chí quốc tế - International research papers (Bibliographic record and/or full-text) >
Please use this identifier to cite or link to this item:
http://tvhdh.vnio.org.vn:8080/xmlui/handle/123456789/21295
|
Title: | Effects of Dietary Mannan Oligosaccharides on Growth, Nonspecific Immunity and Tolerance to Salinity Stress and Streptococcus iniae Challenge in Golden Pompano, Trachinotus ovatus |
Authors: | Do, Huu Hoang Nguyen, Thi Nguyet Hue Vo, Hai Thi |
Keywords: | Fish Golden pompano Trachinotus ovatus Aquaculture Dietary supplementation Mannan oligosaccharide Streptococcus iniae Immune response Salinity |
Issue Date: | 2024 |
Series/Report no.: | Aquaculture Nutrition;Volume 2023, Article ID 9973909, 15 pages, https://doi.org/10.1155/2023/9973909 |
Abstract: | The effects of dietary supplementation with mannan oligosaccharide (MOS) on growth performance, haematological parameters,
abundance of intestinal Vibrio spp., immune response, and tolerance to low salinity stress and Streptococcus iniae challenge were
evaluated in pompano (Trachinotus ovatus). Pompano (3.24 0.45 g) were fed six diets including a basal diet as control, and the
basal diets supplemented with 0.1%, 0.2%, 0.4%, 0.6%, or 0.8% MOSs for 8 weeks. The results showed that pompano fed 0.1%–0.4%
MOS had significantly improved specific growth rates (P ≤ 0:039). Dietary MOS did not affect the survival rate of pompano (P ¼
0:192). WBC count was significantly higher in fish fed diets containing 0.1%–0.6% MOS. Dietary MOS increased lymphocytes
count (P ≤ 0:042) and reduced monocytes and basophils counts (P ≤ 0:019); however, no effects were found on neutrophils and
eosinophil numbers (P ≥ 0:064). Intestinal Vibrio spp. counts reduced in fish fed diets containing 0.1%–0.4% MOS (P ≤ 0:035). The
phagocytic ratio significantly increased in pompano fed diets containing 0.1%–0.6% MOS (P ≤ 0:015), while the phagocytic index
and serum lysozyme activity in fish fed 0.1%–0.4% MOS were significantly higher than the control (P ≤ 0:035). There were
significant positive correlations between MOS levels and fish growth on days 14, 28, 42, and 56 (P ≤ 0:049). In addition, dietary
MOS levels were highly correlated with blood parameters, abundance of intestinal Vibrio spp., and immune responses. Optimal
dietary MOS requirements for maximal growth were estimated to be 0.440% on day 21 (R2 = 0.861), 0.385% on day 28 (R2 = 0.877),
0.371% on day 42 (R2 = 0.891), and 0.365% on day 56 (R2 = 0.750), showing decreasing tendency in MOS requirement as fish size
increased. Furthermore, the optimal MOS concentration for maximal immunity based on lysozyme activity was estimated to be
0.431% (R2 = 0.817) on day 56. In addition, fish fed 0.1%–0.4% MOS showed better resistance to low salinity stress and Streptococcus iniae challenges (P ≤ 0:014). In conclusion, MOS supplementation effectively reduced the prevalence of intestinal Vibrio
spp. and enhanced the growth, immune responses, and tolerance to low salinity stress and Streptococcus iniae in juvenile pompano. |
URI: | http://tvhdh.vnio.org.vn:8080/xmlui/handle/123456789/21295 |
Appears in Collections: | Công bố khoa học ở tạp chí quốc tế - International research papers (Bibliographic record and/or full-text)
|
Files in This Item:
There are no files associated with this item.
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|