Dataset
Explaining dimorphism polymorphism: Stronger interspecific sexual differences may be favored when females search for mates in the presence of congeners
Dryad
05/17/2024
DOI: 10.5061/dryad.k6djh9w90
Abstract
Why are some species sexually dimorphic while other closely related
species are not? While all females in genus Strauzia share a
multiply-banded wing pattern typical of many other true fruit flies, males
of four species have noticeably elongated wings with banding patterns
“coalesced” into a continuous dark streak across much of the wing. We take
an integrative phylogenetic approach to explore the evolution of this
dimorphism and develop general hypotheses underlying the evolution of wing
dimorphism in flies. We find that the origin of coalesced and other
darkened male wing patterns correlate with the inferred origin of host
plant sharing in Strauzia. While wing shape among non-host-sharing species
tended to be conserved across the phylogeny, shapes of male wings for
Strauzia species sharing the same host plant were more different from one
another than expected under Brownian models of evolution and overall rates
of wing shape change differed between non-host-sharing species and
host-sharing species. A survey of North American Tephritidae finds just
three other genera with specialist species that share host plants.
Host-sharing species in these genera also have wing patterns unusual for
each genus. Only genus Eutreta is like Strauzia in having the unusual wing
patterns only in males, and of genera that have multiple species sharing
hosts, only in Eutreta and Strauzia do males hold territories while
females search for mates. We hypothesize that in species that share host
plants, those where females actively search for males in the presence of
congeners may be more likely to evolve sexually dimorphic wing patterns.
Details
- Title: Subtitle
- Explaining dimorphism polymorphism: Stronger interspecific sexual differences may be favored when females search for mates in the presence of congeners
- Creators
- Alaine Hippee - University of IowaMarc A. Beer - Washington State UniversityAllen L. Norrbom - United States Department of AgricultureAndrew A. Forbes - University of Iowa
- Resource Type
- Dataset
- DOI
- 10.5061/dryad.k6djh9w90
- Publisher
- Dryad
- Grant note
- 18-12 / Iowa Academy of Science (https://ror.org/01rtar838) 1026364 / United States Department of Agriculture (https://ror.org/01na82s61) University of Iowa (https://ror.org/036jqmy94)
- Language
- English
- Date published
- 05/17/2024
- Academic Unit
- Biology; University College Courses
- Record Identifier
- 9984630598502771
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