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- W2912175632 abstract "Abstract Lake-dwelling fish that form species pairs/flocks characterized by body size divergence are important model systems for speciation research. While several sources of divergent selection have been identified in these systems, their importance for driving the speciation process remains elusive. A major problem is that in retrospect, we cannot distinguish selection pressures that initiated divergence from those acting later in the process. To address this issue, we reconstructed the initial stages of speciation in European whitefish ( Coregonus lavaretus ) using data from 357 populations of varying age (26-10 000 years). We find that whitefish speciation is driven by a large-growing predator, the northern pike ( Esox lucius ). Pike initiates divergence by causing a largely plastic differentiation into benthic giants and pelagic dwarfs; ecotypes that will subsequently develop partial reproductive isolation and heritable differences in gill raker number. Using an eco-evolutionary model, we demonstrate how pike’s habitat specificity and large gape size are critical for imposing a between-habitat trade-off, causing prey to mature in a safer place or at a safer size. Thereby, we propose a novel mechanism for how predators may cause dwarf/giant speciation in lake-dwelling fish species." @default.
- W2912175632 created "2019-02-21" @default.
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- W2912175632 date "2019-02-08" @default.
- W2912175632 modified "2023-10-05" @default.
- W2912175632 title "Ecological speciation in European whitefish is driven by a large-gaped predator" @default.
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- W2912175632 doi "https://doi.org/10.1101/543744" @default.
- W2912175632 hasPublicationYear "2019" @default.
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