AI Summary & Key Takeaways
AI InsightThe results indicated that the use of anesthetic agent 2-phenoxyethanol duringtransfer reduced mortality rate (0% and 12.89% in TE1-A and TE1-B, respectively, and 2.02% and 15.84% in TE2-A and TE2-B, respectively)and physiological stress in sturgeons
📌 3 Key Takeaways
Abstract
Experiments were carried out to determine the effect of 2-phenoxyethanol to reduce stress response during the transportationof Russian and Siberian sturgeons. In transportation experiment 1 (TE1), Siberian sturgeons (687.2 ± 17.41 g) were stocked in tanksand transported for 90 min (stocking density = 65 ± 0.71 kg/m3). Before transport, 0.5 mg/L 2-phenoxyethanol was applied to the firstgroup (TE1-A, n = 285) but not to the second group (TE1-B, n = 287). In transportation experiment 2 (TE2), Russian sturgeons (1873 ±159 g) were divided into two groups and stocked in tanks as they have a density of 60 ± 0.23 kg/m3 water. Before transport, 0.6 mg/L of2-phenoxyethanol was applied to the first group (TE2-A, n = 99), the second group (TE2-B, n = 101) was left without application. Duringthe 10 h of transport period (at the 2, 4, 6, and 8 h), 0.6 mg/L 2-phenoxyethanol was applied to the fish in the first group (TE2-A) every2 h. The results revealed that plasma glucose and cortisol reached their highest level in the anesthetic-free groups (TE1-B and TE2-B)during transportation in both experiments. There was no difference in the protein levels between anesthetic and anesthetic-free groups.In the TE1-B and TE2-B, red blood cells and hematocrit decreased, neutrophils and white blood cells increased. However, no changeswere observed in eosinophils and mean corpuscular volume between groups in both experiments. Lymphocyte increased in TE1-B incomparison to TE1-A and TE1-BT (before transport anesthetic-free fish in TE1). In addition, there was no change in levels of monocyte,hemoglobin, mean hemoglobin concentration (MCH) and mean corpuscular hemoglobin concentration (MCHC) between TE1-BT, TE1-A,and TE1-B. Monocyte, hemoglobin, MCH, and MCHC increased in TE2-B compared with TE2-BT (before transport anesthetic-free fish inTE2) and TE2-A but the lymphocyte count did not change. The results indicated that the use of anesthetic agent 2-phenoxyethanol duringtransfer reduced mortality rate (0% and 12.89% in TE1-A and TE1-B, respectively, and 2.02% and 15.84% in TE2-A and TE2-B, respectively)and physiological stress in sturgeons