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. 2016 Aug 31;283(1837):20161558. doi: 10.1098/rspb.2016.1558

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© 2016 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — The relationship between midpiece length and flagellum length of sperm (log₁₀ of both traits). Each data point is the mean score for a single male. Examples of sperm design (relative lengths of head, midpiece, tail and flagellum) at three areas of the sperm length spectrum are shown (a) short midpiece and long flagellum (corresponding with data points top left of plot), (b) midpiece and flagellum of approximately equal length (middle right of plot), and (c) long midpiece and short flagellum (bottom right of plot).