Department of Zoology, Oklahoma State University, Stillwater, OK 74078, USA.
J Evol Biol. 2010 Jul;23(7):1564-9. doi: 10.1111/j.1420-9101.2010.02005.x. Epub 2010 May 7.
The energetic cost of acoustic signalling varies tremendously among species. Understanding factors responsible for this heterogeneity is important for understanding the costs and benefits of signalling. Here, we present a general model, based on well-established principles of bioenergetics, which predicts the energetic cost of call production across species. We test model predictions using an extensive database of resting and calling metabolic rates of insects, amphibians and birds. Results are largely supportive of model predictions. Calling metabolic rates scale predictably with body mass and temperature such that calling and resting metabolic rates are directly proportional to each other. The cost of acoustic signalling is approximately 8 times higher than resting metabolic rate in ectotherms, and approximately 2 times higher in birds. Differences in the increase in metabolic rate during calling are explained by the relative size of species' sound-producing muscles. Combined with published work, we quantify call efficiency and discuss model implications.
声信号的能量成本在不同物种之间差异巨大。了解导致这种异质性的因素对于理解信号的成本和收益很重要。在这里，我们提出了一个基于生物能量学已有原则的通用模型，该模型预测了跨物种的叫声产生的能量成本。我们使用昆虫、两栖动物和鸟类的大量休息和发声代谢率的数据库来测试模型的预测结果。结果在很大程度上支持了模型的预测。叫声代谢率与体重和温度呈可预测的比例关系，因此叫声和休息代谢率直接成正比。在变温动物中，声信号的能量成本比休息代谢率高出约 8 倍，在鸟类中则高出约 2 倍。叫声过程中代谢率增加的差异可以通过物种发声肌肉的相对大小来解释。结合已发表的研究，我们量化了叫声效率并讨论了模型的含义。
