Plasma catecholamines in the lesser spotted dogfish and rainbow trout at rest and during different levels of exercise.
Plasma catecholamines in the lesser spotted dogfish and rainbow trout at rest and during different levels of exercise.
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小斑角鲨和虹鳟鱼在休息和不同运动水平时的血浆儿茶酚胺。
DOI：
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发表时间：
1986
影响因子：
2.8
通讯作者：
S. Ginley
中科院分区：
文献类型：
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作者：
P. Butler;J. Metcalfe;S. Ginley
在斑点较少的角鱼和彩虹鲑鱼中，研究了这样的假设，即鱼在运动过程中血浆儿茶酚胺增加，并在运动过程中对心血管调节起重要作用。在休眠鱼中，血浆儿茶酚胺的浓度为10(-9)-10(-8)摩尔L。在角鱼的自发游泳过程中，肾上腺素增加了3.3倍，达到1.9×10~(-8)mol·L~(-1)，去甲肾上腺素增加了2.3倍，达到3.2×10~(-8)mol·L~(-1)。在水槽中以稳定的体长S-1(LS-1)游泳时，两种胺的水平都下降到静止值的25%左右。在约2L~(-1)的负重游泳状态下，肾上腺素是静止值的10倍，而去甲肾上腺素是静止值的2.2倍。反复突击游泳2~3min后，血浆儿茶酚胺水平才显著高于静止值。角鱼体内去甲肾上腺素和肾上腺素含量分别为10×10~(-7)moL·L~(-1)和8.5×10~(-8)moL·L~(-1)和2×10~(-7)moL·L~(-1)。这些水平与其他工作人员使用的儿茶酚胺浓度进行了比较，以引起鳃血管系统、鳃上的气体交换或向组织的气体运输的变化。在斑点较小的角鱼中，自发游泳时血浆中肾上腺素和去甲肾上腺素的水平对鳃血管的最大影响分别为80%和50%，而在虹鳟鱼中，当游泳到明显疲惫时，血浆中的肾上腺素和去甲肾上腺素水平对鳃血管的最大影响约为20%。经过反复突发性游泳后，鲑鱼体内的水平对鳃血管的最大影响达到40%。角鱼和鲑鱼的不同可能与角鱼的鳃血管缺乏神经支配有关。彩虹鲑鱼鳃间气体交换的增强可以通过使用肾上腺素来证明，肾上腺素的浓度是在反复突发性游泳后发现的。然而，鲑鱼在游泳到明显筋疲力尽后，血浆中肾上腺素的浓度可能会导致动脉血液中氧气浓度的增加，从而增强对组织的氧气输送。
The hypothesis that there is an increase in plasma catecholamines during exercise in fish and that they play an important role in the cardiovascular adjustments during exercise was investigated in the lesser spotted dogfish and rainbow trout. In resting fish plasma catecholamines were at a concentration of 10(-9)-10(-8) mol l-1. During spontaneous swimming in the dogfish, adrenaline increased by 3.3 times to 1.9 X 10(-8) mol l-1 and noradrenaline increased by 2.3 times to 3.2 X 10(-8) mol l-1. In rainbow trout swimming at a steady 1 body length s-1 (Ls-1) in a water channel, the levels of both amines decreased to approximately 25% of the resting values. When swimming to apparent exhaustion at approximately 2 Ls-1, adrenaline was 10 times the resting value at 1.4 X 10(-8) mol l-1, whereas noradrenaline was 2.2 times the resting value at 2.3 X 10(-8) mol l-1. Only after repeated burst swimming for 2-3 min did the levels of plasma catecholamines increase substantially above the resting values. In the dogfish, both amines were at 10(-7) mol l-1, whereas in the rainbow trout, noradrenaline was at 8.5 X 10(-8) mol l-1 and adrenaline was at 2 X 10(-7) mol l-1. These levels were compared with the concentrations of catecholamines used by other workers to elicit changes in the branchial vasculature, gas exchange at the gills or gas transport to the tissues. In lesser spotted dogfish, the levels of adrenaline and noradrenaline present in the plasma during spontaneous swimming have 80% and 50% of maximum effect on gill blood vessels, respectively, whereas in rainbow trout the levels present when swimming to apparent exhaustion have approximately 20% of maximum effect on the branchial vasculature. The levels present in the trout after repeated burst swimming have 40% of maximum effect on blood vessels in the gills. The difference between the dogfish and the trout may be related to the lack of innervation of the gill blood vessels in the former. Enhancement of gas exchange across the gills of rainbow trout can be demonstrated by using adrenaline at the concentration found after repeated burst swimming. It is possible, however, that the concentration of adrenaline found in the plasma of trout after swimming to apparent exhaustion may cause an increase in the concentration of oxygen in arterial blood, thus enhancing oxygen delivery to the tissues.(ABSTRACT TRUNCATED AT 400 WORDS)