Evaluation of the effect of cortisol caused by hypoxia on some immunological parameters of tilapia commercialization from the city of Sucua - Ecuador
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Abstract
Introduction. The fish organism responds to any effect of stress by activating corticosteroid hormones, an increase in cortisol in the fish organism destabilizes the state of cellular and humoral immunity factors, depletion of the immune system, continuous stress in fish It can have serious and harmful consequences on your health, they are generally related to the environmental conditions that exist in the environment, in tilapia commercial aquariums it is observed that the most common is hypoxia. Objective. To evaluate the effect of hypoxic stress on some immunological parameters of tilapia. Methodology. The evaluation of the changes in some parameters of the immune system in tilapia under the influence of endogenous cortisol was carried out due to the effects of hypoxia, experimenting with 10 fish, control (5) and experimental (5) group taking blood samples for 3 days, the evaluation of the state of cellular immunity was determined by the phagocytic activity of blood cells (erythrocytes, leukocytes and thrombocytes). Results. When analyzing the changes in the phagocytic activity of the blood cells of the tilapia, a growth of the phagocytic activity is observed in all the blood cells in the fish of the control group; in the fish of the experimental group, the phagocytic activity of the erythrocytes only increased, while the thrombocytes and leukocytes decreased. Cortisol levels in the blood increased while oxygen levels were reduced in the aquarium, in the experimental group. Conclusions. It was found that, with an increase in the level of cortisol, the activity of cellular immunity in fish increases, created by leukocytes, likewise it was determined that some indicators of the immune status decrease with an increase in this hormone.
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Chen, W. H., Sun, L. T., Tsai, C. L., Song, Y. L., & Chang, C. F. (2002). Cold-stress induced the modulation of catecholamines, cortisol, immunoglobulin M, and leukocyte phagocytosis in tilapia. General and comparative endocrinology, 126(1), 90-100.
Girón-Pérez, M. I., & Zaitseva, G. P. (2004). La contaminación acuática y la inmunidad de los peces. Luz María Villarreal de Puga, 83.
Girón-Pérez, M. I., Barcelos-Garcia, R.,et al. (2006). Effect of chlorpyrifos on the hematology and phagocytic activity of Nile tilapia cells (Oreochromis niloticus). Toxicology mechanisms and methods, 16(9), 495-499.
Magnadóttir, B. (2006). Innate immunity of fish (overview). Fish & shellfish immunology, 20 (3), 2, 137-151.
Mikryakov, V. (2007). Effect of transportation on the composition of peripheral blood leukocytes of carp. Voprosy rybolovstva, 2(30), 209-214.
Passantino, L., Altamura, M. et al. (2002). Binding and engulfment of Candida albicans by erythrocytes of Rainbow trout (Salmo gairdneri Richardson) Immunopharmacology and immunotoxicology. Fish immunology, 24 (4), 665- 678.
Perestoronina, E. (2018). The dependence of immunological parameters of fish on the
oxygen content in water. Vologda-Molochnoye, 3(2), 148-152.
Olabuenaga, S. E. (2000). Sistema inmune en peces. Gayana (Concepción), 64(2), 205-215.
Ortuño, J., & Esteban, M. (2001). Effects of short-term crowding stress on the gilthead seabream (Sparus aurata L.) innate immune response. Fish & shellfish immunology, 11 (2), 187-197.
Tort, L. (2011). Stress and immune modulation in fish. Developmental & Comparative Immunology, 35 (12), 1366-1375.
Zhang, L., Wang, C., Liu, H., & Fu, P. (2019). The important role of phagocytosis and interleukins for nile tilapia (Oreochromis niloticus) to defense infection of Aeromonas hydrophila based on transcriptome analysis. Fish & shellfish immunology, 92, 54-63.