An allometric analysis of oxygen consumption rate and cardiovascular function in the cockroach, Blaberus discoidalis
An allometric analysis of oxygen consumption rate and cardiovascular function in the cockroach, Blaberus discoidalis
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DOI：
10.1016/s1095-6433(00)00351-2
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发表时间：
2001-06-01
影响因子：
2.3
通讯作者：
Arendse, AU
中科院分区：
文献类型：
--
作者：
Birchard, GF;Arendse, AU
通过异速生长分析，在脊椎动物中代谢率和心血管功能的相互关系已得到很好的证明。然而，在昆虫中缺乏类似的研究。与脊椎动物不同，昆虫的心血管系统在氧气运输中不起重要作用。比较昆虫和脊椎动物的相互关系可能会提供洞察代谢率和心血管系统之间的联系的性质。在质量为0.03- 5g的蟑螂Blaberusdiscoidalis的腹部测量了耗氧量、心率和心脏尺寸。氧气消耗率的指数为0.83。心率和体重之间的关系呈负相关，然而，它似乎不是线性的。通过测量心脏宽度、腹部长度和心率，估计每搏输出量和心输出量。心输出量似乎以指数0.85线性缩放，这与观察到的耗氧率指数没有显著差异。因此，在脊椎动物中观察到的耗氧率和心输出量指数之间的相似性似乎也存在于昆虫中。(C)2001 Elsevier Science Inc. All rights reserved.
The interrelationship of metabolic rate and cardiovascular function has been well documented in vertebrates through allometric analyses. However, similar studies are lacking in insects. Unlike vertebrates, the cardiovascular system of insects does not play a significant role in oxygen transport. A comparison of the interrelationship in insects and vertebrates might provide insight into the nature of the connection between metabolic rate and the cardiovascular system. Oxygen consumption, heart rate and heart dimensions were measured in the nymphs of the cockroach Blaberus discoidalis over a mass range of 0.03-5 g. Oxygen consumption rate scaled with an exponent of 0.83. The relationship between heart rate and body mass scaled negatively, however, it did not appear to be linear. Using measurements of heart widths, abdominal length and heart rate, stroke volume and cardiac output were estimated. Cardiac output appeared to scale linearly with an exponent of 0.85, which was not significantly different from the exponent observed for the rate of oxygen consumption. Thus, the observed similarity between the exponents for oxygen consumption rate and cardiac output in vertebrates also appears to be present in insects. (C) 2001 Elsevier Science Inc. All rights reserved.