Size selection by a gape-limited predator of a marine snail: Insights into magic traits for speciation.

A Fisher's exact test of association comparing the number of mature females and the number of juveniles for the two ecotypes within the size range was highly significant ( n = 92, df = 1, p < .001).

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On the upper shore (High), there is a clear trend showing higher predation on the 4‐mm prey category than on the 9‐mm prey category (Figure 4 a).

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