Physiological, ionoregulatory, metabolic and immune responses of Persian sturgeon,Acipenser persicus(Borodin, 1897) to stress

Abstract

The physiological ionoregulatory, metabolic and immune responses of Persian sturgeon, Acipenser persicus, to acute stress were investigated. Water levels were lowered to the fish dorsal scutes, and fish were blood-sampled before stress (pre-stress), and 0, 6, 24 and 72 h after stress. Results showed that serum cortisol rapidly increased after stress, returning to initial levels at 24 h. Serum glucose significantly increased at 6 h, declining to the pre-stress levels at 72 h. Serum triglyceride and cholesterol showed significant decreases at 0 h, then increasing to higher than the initial levels at 72 h. Serum T 3 and T 4 significantly decreased at 0 h and recovered at 72 h. Serum chloride levels showed no significant changes while serum calcium showed a significant increase at 0 h and a further increase until 72 h poststress. Serum total protein and alternative complement activity showed a significant initial decrease and recovery at 24 h with further increase at 72 h. Serum lysozyme activity increased significantly at 24 and 72 h after stress. Serum total immunoglobulin significantly increased at 0 h and peaked at 24 h. This is the first work showing thyroid hormone and immunological responses in Persian sturgeon subjected to stress, and the results show that this species follows a classical hormonal and energetic stress response, although, in the low range among the sturgeons. Although transient and moderate, confinement stress can induce significant changes in the innate immune response.

Serum cortisol, glucose, thyroid hormones' and non-specific immune responses of Persian sturgeon, Acipenser persicus to exogenous tryptophan and acute stress

“…The stress responses in the present study were similar to those reported by Hoseini et al (2015) in Persian sturgeons subjected to a 4 hconfinement stress. Increased circulating cortisol and glucose levels, and decrease in ACH50 and lysozyme activities and thyroid hormones' levels are common responses of fish to stresses (Brown et al, 1991;Bonga, 1997;Barton, 2002;Walpita et al, 2007;Hoseini et al, 2015).…”

“…Also, like mammals, it was demonstrated that stress and elevated circulating cortisol levels suppress thyroid hormones' levels in fish (Brown et al, 1991;Walpita et al, 2007). Recently, it was demonstrated that stressed Persian sturgeons have high levels of circulating cortisol accompanied with low levels of T 4 and T 3 (Hoseini et al, 2015). Also, the results suggest that the effect of exogenous tryptophan on thyroid hormones presents until 72 h post-stress, when serum cortisol levels returned to prestress level.…”

“…Increased circulating cortisol and glucose levels, and decrease in ACH50 and lysozyme activities and thyroid hormones' levels are common responses of fish to stresses (Brown et al, 1991;Bonga, 1997;Barton, 2002;Walpita et al, 2007;Hoseini et al, 2015).…”

“…It has been demonstrated that stress suppresses thyroid hormones' level in fish (Brown et al, 1991;Walpita et al, 2007) including Persian sturgeon (Hoseini et al, 2015). Limited data are available about the effect of dietary tryptophan on thyroid hormones' level in fish.…”

Effect of dietary taurine and methionine supplementation on growth performance, body composition, taurine retention and lipid status of Persian sturgeon,Acipenser persicus(Borodin, 1897), fed with plant-based diet

“…Aforementioned studies clearly show that the effects of taurine on fish are situation‐ and species‐dependent. Persian sturgeon is one of the most important species inhabitants in the Caspian Sea with great aquaculture potential (Hoseini, Tort, Abolhasani, & Rajabiesterabadi, ). Recently, the effects of taurine supplementation on a sturgeon species (Persian sturgeon [ Acipenser persicus ]) were investigated showing that taurine supplementation to plant‐based diet had adverse effects on the fish performance (Hoseini, Hosseini, Eskandari, Amirahmadi, & Sudagar, ).…”