10.5061/DRYAD.C6B40
Johnson, Jerald B.
Brigham Young University
Ingley, Spencer J.
Brigham Young University
Data from: Divergent natural selection promotes immigrant inviability at
early and late stages of evolutionary divergence
Dryad
dataset
2016
path analysis
Brachyrhaphis roseni
mesocosm
Brachyrhaphis terrabensis
Brachyrhaphis rhabdophora
Swimming performance
Brachyrhaphis
Poeciliidae
2016-01-26T17:57:15Z
2016-01-26T17:57:15Z
en
https://doi.org/10.1111/evo.12872
139036 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Natural selection's role in speciation has been of fundamental
importance since Darwin first outlined his theory. Recently, work has
focused on understanding how selection drives trait divergence, and
subsequently reproductive isolation. ‘Immigrant inviability’, a barrier
that arises from selection against immigrants in their non-native
environment, appears to be of particular importance. Although immigrant
inviability is likely ubiquitous, we know relatively little about how
selection acts on traits to drive immigrant inviability, and how important
immigrant inviability is at early-versus-late stages of divergence. We
present a study evaluating the role of predation in the evolution of
immigrant inviability in recently-diverged population pairs and a
well-established species pair of Brachyrhaphis fishes. We evaluate
performance in a high-predation environment by assessing survival in the
presence of a predator, and swimming endurance in a low-predation
environment. We find strong signatures of local adaptation and immigrant
inviability of roughly the same magnitude both early and late in
divergence. We find remarkably conserved selection for burst-speed
swimming (important in predator evasion), and selection for increased size
in low-predation environments. Our results highlight the consistency with
which selection acts during speciation, and suggest that similar factors
might promote initial population differentiation and maintain
differentiation at late stages of divergence.
Brachyrhaphis endurance and kinematicsThis file contains endurance and
kinematics measures for species and populations of Brachyrhaphis fishes
(Poeciliidae) from different predation
environments.Brachy_Endurance_EVOLUTION_DRYAD.xlsxBrachyrhaphis burst
speed and mesocosmThis file contains the results of a mesocosm experiment
with species of Brachyrhaphis fishes (Poeciliidae) from different
predation environments. This file also includes burst speed measurements
and a measure of relative body
shape.Burst_speed_mesocosm_Data_EVOLUTION_DRYAD.xlsx
Panama
Costa Rica