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Effects of transporting stress on the immune responses of Asian seabass Lates calcarifer fry

文献类型： 外文期刊

作者： Hong, Jiawei 1 ; Zhou, Shengjie 1 ; Yu, Gang 1 ; Qin, Chuanxin 1 ; Zuo, Tao 1 ; Ma, Zhenhua 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Trop Aquaculture Res & Dev Ctr, Sanya 572018, Peoples R China

2.Sanya Trop Fisheries Res Inst, Sanya, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab South China Sea Fishery Resources Exploit, Guangzhou, Peoples R China

关键词： immune genes; Lates calcarifer; physico-chemical indexes; transporting stress

期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）

ISSN： 1355-557X

年卷期： 2021 年 52 卷 5 期

页码：

收录情况： SCI

摘要： Transportation is of high risk and cannot be avoided during the productive practice of Lates calcarifer fry. To achieve an optimal transporting protocol, the changes of physico-chemical indexes and immune genes expression of fry after transportation were evaluated. The fish were simulated transported at the density of 7 kg/m(3) for different time (T1 = 4 h, T2 = 8 h, T3 = 12 h, T4 = 16 h, T5 = 20 h, T6 = 24 h) and at three densities (D1 = 14 kg/m(3), D2 = 21 kg/m(3), D3 = 28 kg/m(3)) for 24 h. With the intensive stress, a decrease in pH and an increase in NH4+-N were observed. At transporting density experiment, the cortisol of every group except T3 had a significant difference with the control. ALT, AST and ACP activity were all close to a rise first and then decline trend. IL-8, TNF and IFN-gamma 1 were activated to promote inflammation at different degrees of transportation pressure, while the tendency of L10 and TGF-beta 1 was similar. CRP also had no significant increase under different transporting durations stress. HSP70 undertook main repair work as expression level of it increased gradually. Complement did not reach its release standard at duration experiment expect for T3 group of C3. However, density experiment had no obviously positive effects on physico-chemical indexes and the relative expression of immune genes. The results indicated that when the transporting time exceeded 8 h at the density of 7 kg/m(3), significant immune response started happening to fish. The transporting density stress has stimulated the fries but the immune response was still under the inhibited state owing to the ammonia toxicity reduction by much lower pH.

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