The effects of starvation on some epidermal mucus immune parameters in rainbow trouts

Q3 Environmental Science International Journal of Aquatic Biology Pub Date : 2019-10-25 DOI:10.22034/IJAB.V7I5.634

S. Soltanian, A. Gholamhosseini

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引用次数: 1

Abstract

The skin of a fish acts as the primary protective agent against biological, physical, and chemical stress. However, the effects of such stressors on fish mucosal immune responses have been hardly investigated. Fasting or feed deprivation commonly is occurred in aquaculture due to season, production policies, or disease. This research was aimed to investigate the impacts of 20-day starvation on skin mucosal immune responses of rainbow trout. The results revealed that the enzymatic activities of lysozyme (LZM) and alkaline phosphatase (ALP), as well as the total immunoglobulins (Ig) level and bactericidal activities were significantly reduced in the skin mucus of fasted fish. No significant changes were observed in the esterase and protease activities. Bactericidal activity in the mucus of starved fish was significantly lower than control group after 20 days. Therefore, it could be strongly suggested that this species should not remain under starvation stress as this kind of stress impairs mucosal immune barriers which, in turn, could make the fish more susceptible to infections or harmful agents.

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饥饿对虹鳟鱼表皮黏液免疫参数的影响

鱼的皮肤是抵御生物、物理和化学压力的主要保护剂。然而，这些应激源对鱼类粘膜免疫反应的影响几乎没有研究。由于季节、生产政策或疾病的原因，在水产养殖中经常发生禁食或饲料剥夺。本研究旨在探讨饥饿20 d对虹鳟鱼皮肤黏膜免疫反应的影响。结果表明，禁食鱼皮肤黏液中溶菌酶(LZM)和碱性磷酸酶(ALP)活性、总免疫球蛋白(Ig)水平和杀菌活性均显著降低。酯酶和蛋白酶活性无明显变化。20 d后，饥饿鱼黏液的杀菌活性显著低于对照组。因此，可以强烈建议该物种不应继续处于饥饿压力下，因为这种压力会损害粘膜免疫屏障，从而使鱼类更容易受到感染或有害物质的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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