Resolution:
## Figure 1.
Recorded relationships between head length and flagellum length. Upper left panel interspecific studies: Black squares – mammals ; Red circles – frogs ; Blue up triangles – shorebirds
; Green diamonds – mammals ; Cyan down triangles – frogs. Inset: Violet squares –
beetles. Lower left panel intraspecific studies: Pink circles - boar ; Orange up triangles – salmon. Solid lines indicate
RMA regression lines, vertical and horizontal lines are non-significant relationships.
Right hand panel: Resulting relationships between total sperm length and predicted speed. Colours correspond to the studies in the left had panels. Note the range of possible
patterns, dependent on the scaling parameter c : Black – positive (c = 1.0); Red – positive (c = 1.0); Blue – negative (c = 1.0); Green – negative (b = 0.0); Cyan – negative (c = 0.46); Violet – positive (b = 8); Pink – positive (b = 8); and Orange – positive (c = -0.29). Citations for the studies used are given in the Additional file 1.
Humphries |