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Rowena Spence, Robert J. Wootton, Iain Barber, Mirosław Przybylski and Carl Smith Ecological causes of morphological evolution in the three-spined stickleback Ecology and Evolution 3

Article first published online: 6 MAY 2013 | DOI: 10.1002/ece3.581

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We investigated the ecological mechanisms that underpin adaptive evolutionary change in the three-spined stickleback. On the Hebridean Island of North Uist, where sticklebacks have undergone a striking morphological radiation, we investigated alternative hypotheses; calcium availability and predation as the major selective agents. We detected a significant effect of dissolved calcium on morphology but no effect of predation, contradicting the generally held view that predation is the primary agent of plate and spine morph selection.

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