Is there an optimal haematocrit for rainbow trout, Oncorhynchm mykiss (Walbaum)? An interpretation of recent data based on blood viscosity measurements
Is there an optimal haematocrit for rainbow trout, Oncorhynchm mykiss (Walbaum)? An interpretation of recent data based on blood viscosity measurements
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虹鳟鱼 Oncorhynchm mykiss (Walbaum) 是否存在最佳红细胞压积？
DOI：
10.1111/j.1095-8649.1991.tb03090.x
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发表时间：
1991
影响因子：
2
通讯作者：
R. Weber
中科院分区：
文献类型：
--
作者：
R. Wells;R. Weber
虹鳟鱼的血液粘度是在通过出血、缺氧来控制红细胞压积后测量的。运动和麻醉。在高剪切速率（225 s 1）下测量的血液粘度与红细胞压积成正比，但对于运动和麻醉的鳟鱼的肿胀红细胞，粘度对剪切速率的依赖性要小得多。红细胞肿胀在运动和麻醉的鳟鱼中最为明显，当考虑红细胞压差对粘度的影响时，这是一个混淆因素。
The viscosity of blood from rainbow trout was measured following manipulation of haematocrit by bleeding, hypoxia. exercise, and anaesthesia. Blood viscosity when measured at high shear rate (225 s 1) was proportional to haematocrit, but the dependence of viscosity on shear rate was far less for swollen erythrocytes from exercised and anaesthetized trout. Erythrocyte swelling was most marked in exercised and anaesthetized trout, and is a confounding factor when considering the effect of haematocrit on viscosity.
The viscosity of blood with variable haematocrit, but constant mean cell Hb concentration, indicated that the relative oxygen transport capacity in trout was optimal at a haematocrit of 30%. Data from this, and earlier studies show that haematocrit in trout is variable and labile, yet none of the haematocrit values following manipulations are less than 85% of optimal. Optimal haematocrit is however, significantly higher than measured values from either cannulated or acutely venesected resting trout.