Heart metabolic scaling relationship with heart size.

<p>Log of basal oxygen consumption rates (OCR) for isolated hearts is plotted against log of isolated heart mass for (a) all five species <i>(n = 130)</i>, (b) <i>Danio rerio (n = 48)</i> and (c) <i>Fundulus heteroclitus (n = 28)</i>. Non-linear regressions were conducted across each data set based on least-squares test. <i>b</i> is the scaling exponent. Standard error, 95% confidence interval and <i>R</i>^<i>2</i> values and the scaling exponent <i>b</i> for individual species are included in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0137710#pone.0137710.s008" target="_blank">S5 Table</a>.