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Differential survival between visual environments supports a role of divergent sensory drive in cichlid fish speciation

Maan, M. E., Seehausen, O. & Groothuis, T. G. G. Jan-2017 In : American naturalist. 189, 1, p. 78-85 8 p.

Research output: Scientific - peer-reviewArticle

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Identifying the selective forces that initiate ecological speciation is a major challenge in evolutionary biology. Sensory drive has been implicated in speciation in various taxa, largely based on phenotype-environment correlations and signatures of selection in sensory genes. Here, we present a reciprocal transplant experiment revealing species differences in performance in alternative visual environments, consistent with speciation by divergent sensory drive. The closely related cichlids Pundamilia pundamilia and Pundamilia nyererei inhabit different visual environments in Lake Victoria and show associated differences in visual system properties. Mimicking the two light environments in the laboratory, we find a substantial reduction in survival of both species when reared in the other species' visual environment. This implies that the observed differences in Pundamilia color vision are indeed adaptive and substantiates the implicit assumption in sensory drive speciation models that divergent environmental selection is strong enough to drive divergence in sensory properties.

Original languageEnglish
Pages (from-to)78-85
Number of pages8
JournalAmerican naturalist
Volume189
Issue number1
StatePublished - Jan-2017

    Keywords

  • mortality, visual adaptation, experiment, fitness, reciprocal transplant, Lake Victoria, Pundamilia, LAKE VICTORIA CICHLIDS, SEXUAL SELECTION, ADAPTIVE RADIATION, MOLECULAR EVOLUTION, SPECTRAL COMPOSITION, LIGHT ENVIRONMENT

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