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Fig. 1 | BMC Evolutionary Biology

Fig. 1

From: Oviposition traits generate extrinsic postzygotic isolation between two pine sawfly species

Fig. 1

Needle width is a potential source of selection on oviposition traits. a Mean mature needle width (+/- SEM) of different pine species preferred by N. pinetum (white) and N. lecontei (grey). Letters indicate hosts that differ significantly at P < 0.05 (Additional file 1: Table S4). N. pinetum’s preferred host species has significantly thinner needles than those of N. lecontei’s hosts. b A N. lecontei female uses her saw-like ovipositor to carve an egg pocket into a pine needle (Photo by R.K. Bagley)

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