Multiple axes of visual system diversity in Ithomiini, an ecologically diverse tribe of mimetic butterflies
Journal of Experimental Biology,
Год журнала:
2023,
Номер
226(24)
Опубликована: Ноя. 3, 2023
The
striking
structural
variation
seen
in
arthropod
visual
systems
can
be
explained
by
the
overall
quantity
and
spatio-temporal
structure
of
light
within
habitats
coupled
with
developmental
physiological
constraints.
However,
little
is
currently
known
about
how
fine-scale
structures
arises
across
shorter
evolutionary
ecological
scales.
In
this
study,
we
characterise
patterns
interspecific
(between
species),
intraspecific
sexes)
intraindividual
eye
regions)
system
four
ithomiine
butterfly
species.
These
species
are
part
a
diverse
26-million-year-old
Neotropical
radiation
where
changes
mimetic
colouration
associated
shifts
ecology,
such
as
microhabitat
preference.
Using
combination
selection
analyses
on
opsin
sequences,
vivo
ophthalmoscopy,
micro-computed
tomography
(micro-CT),
immunohistochemistry,
confocal
microscopy
neural
tracing,
quantify
describe
physiological,
anatomical
molecular
traits
involved
processing.
these
data,
provide
evidence
substantial
Ithomiini,
including:
(i)
relaxed
opsins,
perhaps
mediated
habitat
preference,
(ii)
physiology
anatomy,
(iii)
extensive
sexual
dimorphism,
including
complete
absence
butterfly-specific
optic
neuropil
males
some
We
conclude
that
considerable
exist
insect
radiations,
hinting
at
lability
to
rapidly
develop
specialisations
distinct
ecologies,
acting
perceptual,
processing
level.
Язык: Английский
Selection drives divergence of eye morphology in sympatric Heliconius butterflies
Evolution,
Год журнала:
2024,
Номер
78(7), С. 1338 - 1346
Опубликована: Май 10, 2024
When
populations
experience
different
sensory
conditions,
natural
selection
may
favor
system
divergence,
affecting
peripheral
structures
and/or
downstream
neural
pathways.
We
characterized
the
outer
eye
morphology
of
sympatric
Heliconius
butterflies
from
forest
types
and
their
first-generation
reciprocal
hybrids
to
test
for
adaptive
visual
divergence
hybrid
disruption.
In
Panama,
cydno
occurs
in
closed
forests,
whereas
melpomene
resides
at
edge.
Among
wild
individuals,
H.
has
larger
eyes
than
melpomene,
there
are
heritable,
habitat-associated
differences
brain
that
exceed
neutral
expectations.
Notably,
have
intermediate
phenotypes,
suggesting
To
similar
effects
periphery,
we
reared
both
species
common
garden
conditions.
confirm
provide
new
evidence
this
is
driven
by
selection.
Hybrid
more
melpomene-like
despite
body
size
being
intermediate,
contrasting
with
trait
intermediacy.
Overall,
our
results
suggest
between
suffer
fitness
costs
due
a
mismatch
previously
described
traits
could
affect
performance.
Язык: Английский
Mutualisms within light microhabitats drive sensory convergence in a mimetic butterfly community
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 19, 2024
Abstract
Niche
partitioning
within
variable
habitats
can
expose
species
to
distinct
sensory
information.
Vision
is
the
primary
modality
used
by
many
animals
interact
with
their
habitat.
However,
diurnal
terrestrial
ecosystems,
little
known
if,
and
how,
variation
in
light
environments
impact
assemblages
visual
system
evolution.
By
studying
a
diverse,
sympatric
community
of
mimetic
butterflies,
we
demonstrate
that
forest
architecture
creates
mosaic
microhabitats
drive
adaptive
convergence
divergence
both
peripheral
central
systems.
Our
study
provides
insights
into
dynamic
response
systems
when
confronted
similar
ecological
challenges,
illustrates
wide-reaching
consequences
interspecific
mutualisms,
such
as
mimicry,
on
organismal
Язык: Английский
Forest habitat and forest dominated landscapes are associated with bumblebee species with visual traits related to light sensitivity
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 17, 2024
Abstract
While
functional
traits
like
body
size
have
been
extensively
linked
to
species
distributions,
the
influence
of
sensory
on
species’
responses
environmental
changes
remains
underexplored.
Particularly,
relationship
between
light
sensitivity
and
niche
segregation
across
different
distributional
extents
–
local
habitat
conditions
entire
landscapes
unclear.
In
this
study,
we
examined
bumblebee
communities
monitored
Norway
grassland
forest
habitats
within
varying
in
cover
1
km
radii.
We
investigated
whether
eye
parameter
a
visual
trait
measuring
trade-off
(high
values)
resolution
(low
was
associated
with
types
at
landscape
scale.
Additionally,
combined
bumblebee-plant
interactions
plant
trait,
determine
if
correlated
shade
tolerance
plants
they
foraged
on.
Our
findings
showed
that
high
parameters
were
more
common
abundant
areas
greater
cover,
while
low
opposite
trend.
This
pattern
also
reflected
community
level,
as
indicated
by
community-weighted
mean
which
increased
higher
habitats.
Furthermore,
bumblebees
tended
forage
tolerance.
These
results
suggest
adaptations
for
contribute
shaping
distributions
scales.
Overall,
our
study
underscores
importance
pollinator
vision
understanding
niches,
relation
use
foraging
behaviour.
By
relating
abilities
niches
first
time,
provides
an
important
basis
future
modelling
plant-pollinator
targeted
conservation
measures
both
pollinators
forested
landscapes.
Язык: Английский