The American Naturalist,
Год журнала:
2024,
Номер
unknown, С. 000 - 000
Опубликована: Дек. 17, 2024
AbstractSexual
selection
is
widely
hypothesized
to
facilitate
speciation
and
phenotypic
evolution,
but
evidence
from
comparative
studies
has
been
mixed.
Many
previous
have
relied
on
proxy
variables
quantify
the
intensity
of
sexual
selection,
raising
possibility
that
inconclusive
results
may
reflect,
in
part,
imperfect
measurement
this
evolutionary
process.
Here,
we
test
relationship
between
phylogenetic
rates
indices
opportunity
for
drawn
populations
82
vertebrate
taxa.
These
provide
a
much
more
direct
assessment
than
traits
allow
straightforward
comparisons
among
distantly
related
clades.
We
find
no
correlation
rate,
result
consistent
across
many
complementary
analyses.
In
addition,
used
variables-sexual
dimorphism
dichromatism-are
not
correlated
with
employed
here.
Moreover,
low
signal
intraspecific
variability
species
approaches
range
variation
observed
all
vertebrates
as
whole.
Our
potentially
reconcile
major
paradox
biology
at
interface
microevolution
macroevolution:
can
be
important
speciation,
yet
lability
process
over
deeper
timescales
restricts
its
impact
broad-scale
patterns
biodiversity.
Ecology and Evolution,
Год журнала:
2022,
Номер
12(12)
Опубликована: Дек. 1, 2022
Classic
evolutionary
theory
suggests
that
sexual
dimorphism
evolves
primarily
via
and
fecundity
selection.
However,
evidence
are
beginning
to
accumulate
suggesting
resource
competition
can
drive
the
evolution
of
dimorphism,
ecological
character
displacement
between
sexes.
A
key
prediction
this
hypothesis
is
extent
divergence
sexes
will
be
associated
with
dimorphism.
As
stable
isotope
ratios
animal
tissues
provide
a
quantitative
measure
various
aspects
ecology,
we
carried
out
meta-analysis
examining
associations
isotopic
body
size
Our
models
demonstrate
large
amounts
between-study
variation
in
(ecological)
nonrandom
may
traits
study
subjects.
We,
therefore,
completed
meta-regressions
examine
whether
We
found
modest
but
significantly
positive
across
species
differences
sexes,
increased
strength
when
opportunity
for
dietary
was
greatest.
results,
further
ecologically
mediated
selection,
not
directly
related
reproduction,
contribute
Animals,
Год журнала:
2023,
Номер
13(23), С. 3695 - 3695
Опубликована: Ноя. 29, 2023
Dominance
and
leverage
are
both
possible
causes
of
social
inequality.
If
sexual
dimorphism
influences
patterns
intersexual
dominance,
we
predicted
that
highly
dimorphic
species
constrained
to
exhibit
male-biased
power
(MP),
but
with
low
free
demonstrate
a
broader
range
relationships.
market
effects
influence
leverage,
females
have
more
when
group
composition
is
estrus
asynchronous.
We
analyzed
data
on
power,
dimorphism,
expected
estrous
overlap,
sex
ratio
for
79
extant
primate
using
phylogenetic
logistic
regression
ancestral
state
reconstructions.
Although
MP
common,
every
major
clade
includes
non-MP
species.
was
associated
greater
body
mass
canine
length
female-biased
sex-ratios.
Low
overlap
non-MP.
reconstructed
as
likely
anthropoids,
the
last
common
ancestor
this
probably
did
not
high
dimorphism.
The
catarrhines
dimorphic,
potentially
constraining
Non-MP
evolved
multiple
times
in
primates
may
be
less
because
traits
linked
while
fewer
or
equality.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(3)
Опубликована: Янв. 8, 2024
The
impact
of
sexual
selection
on
the
evolution
birds
has
been
widely
acknowledged.
Although
hypothesized
as
a
driving
force
in
occurrences
numerous
morphological
features
across
theropod
evolution,
this
hypothesis
yet
to
be
comprehensively
tested
due
challenges
identifying
sex
fossils
and
by
limited
sample
size.
Confuciusornis
sanctus
is
arguably
best-known
early
avialan
represented
thousands
well-preserved
specimens
from
Early
Cretaceous
Jehol
lagerstätte,
which
provides
us
with
chance
decipher
strength
extinct
vertebrates.
Herein,
we
present
morphometric
study
C.
based
largest
size
taxon
collected
up
now.
Our
results
indicate
that
characteristic
elongated
paired
rectrices
sexually
dimorphic
trait
statistically
robust
inferences
dimorphism
size,
shape,
allometry
have
established,
providing
earliest
known
avian
evolution.
findings
suggest
selection,
conjunction
natural
does
act
upon
body
limb
length
ratio
birds,
thereby
promoting
deeper
understanding
role
large-scale
phylogenetic
Ecology and Evolution,
Год журнала:
2024,
Номер
14(7)
Опубликована: Июль 1, 2024
An
advantage
of
sex
chromosomes
may
be
the
potential
to
reduce
sexual
conflict
because
they
provide
a
basis
for
selection
operate
separately
on
females
and
males.
However,
evaluating
relationship
between
is
challenging
owing
difficulty
in
measuring
substantial
divergence
species
with
without
chromosomes.
We
therefore
examined
sex-biased
gene
expression
as
proxy
three
sets
The American Naturalist,
Год журнала:
2024,
Номер
unknown, С. 000 - 000
Опубликована: Дек. 17, 2024
AbstractSexual
selection
is
widely
hypothesized
to
facilitate
speciation
and
phenotypic
evolution,
but
evidence
from
comparative
studies
has
been
mixed.
Many
previous
have
relied
on
proxy
variables
quantify
the
intensity
of
sexual
selection,
raising
possibility
that
inconclusive
results
may
reflect,
in
part,
imperfect
measurement
this
evolutionary
process.
Here,
we
test
relationship
between
phylogenetic
rates
indices
opportunity
for
drawn
populations
82
vertebrate
taxa.
These
provide
a
much
more
direct
assessment
than
traits
allow
straightforward
comparisons
among
distantly
related
clades.
We
find
no
correlation
rate,
result
consistent
across
many
complementary
analyses.
In
addition,
used
variables-sexual
dimorphism
dichromatism-are
not
correlated
with
employed
here.
Moreover,
low
signal
intraspecific
variability
species
approaches
range
variation
observed
all
vertebrates
as
whole.
Our
potentially
reconcile
major
paradox
biology
at
interface
microevolution
macroevolution:
can
be
important
speciation,
yet
lability
process
over
deeper
timescales
restricts
its
impact
broad-scale
patterns
biodiversity.
