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Comment on Cognition-mediated evolution of low-quality floral nectars.

Authors: Pyke, G. H.; Waser, N. M.ORCID
Year: 2017
Journal: Science, Vol. 358
Publisher: UNKNOWN
DOI: 10.1126/science.aao1962

Abstract

Nachev <i>et al</i> (Reports, 6 January 2017, p. 75) present dilute nectar in bat-pollinated plants as "paradoxical" because bats prefer concentrated nectar, but paradox disappears with realistic assumptions about nectar evolution. We argue that they make unrealistic assumptions about the cognitive abilities of bat pollinators, invoke Weber's law inappropriately, and cannot predict observed nectar concentrations of bat flowers or negative correlations between pollinator body size and average concentration.

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