Figure 1.

Relation between sperm competition and sperm dimensions in eutherian mammals. Relations between relative testes mass and (A) total sperm length (μm), (B) sperm head length (μm), (C) sperm midpiece length (μm), (D) sperm principal piece length (μm), (E) total sperm flagellum length (μm), and (F) sperm head length/width ratio, among eutherian mammals.

Tourmente et al. BMC Evolutionary Biology 2011 11:12   doi:10.1186/1471-2148-11-12
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