In this study, we investigated the effects of different stocking densities water quality and blood parameters during the transportation of the Siberian sturgeon (Acipenser baerii). Experiments were carried out in high-density polyethylene tank with three different stocking densities (50, 100 and 150 kg/m³) for 20 h. Ammonium nitrogen (NH₄-N) and nitrite nitrogen (NO₂-N) were measured in the water samples. The erythrocyte, leucocyte, haematocrit (HCT), haemoglobin (Hb), cortisol, and sodium ion (Na⁺) were measured in blood samples. Ammonium nitrogen and nitrite nitrogen concentrations in the water have increased in parallel with the stocking density depending on the time. In the highest stocking density, the maximum levels of NH₄-N and NO₂-N at the 16^th h reached 2.64 mg/L and 4.74 mg/L, respectively. Erythrocyte, leucocyte, HCT, and Hb values did not differ significantly between the experimental groups (p > .05). The results showed that fish could be transported safely for 20 h in 15℃ water temperature at 50 kg/m³ stocking density; however, stocking density of 100 kg/m³ and over could threaten fish welfare and health as from 16^th h.

中文翻译：

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活体运输过程中放养密度对西伯利亚鲟血液学参数的影响（Acipenser baerii, Brandt, 1869）

在这项研究中，我们调查了不同放养密度的水质和血液参数在西伯利亚鲟（Acipenser baerii）运输过程中的影响。实验在具有三种不同放养密度（50、100 和 150 kg/m ³）的高密度聚乙烯罐中进行 20 小时。测量水样中的铵态氮 (NH ₄ -N) 和亚硝酸盐态氮 (NO ₂ -N)。红细胞、白细胞、血细胞比容 (HCT)、血红蛋白 (Hb)、皮质醇和钠离子 (Na ⁺) 是在血液样本中测量的。随着时间的推移，水中的铵态氮和亚硝酸盐氮浓度随着放养密度的增加而增加。在最高的饲养密度，NH的最大电平₄ -N和NO ₂在16-N^个h时达到2.64毫克/ L和4.74毫克/升。红细胞、白细胞、HCT 和 Hb 值在实验组之间没有显着差异 ( p  > .05)。结果表明，在15℃水温、50 kg/m ³放养密度下，鱼可安全运输20 h ；然而，从^第16小时起，100 kg/m ³及以上的放养密度可能会威胁鱼类的福利和健康。