Evolution,
Journal Year:
2022,
Volume and Issue:
unknown
Published: Oct. 12, 2022
Adaptations
to
habitats
lacking
light,
such
as
the
reduction
or
loss
of
eyes
and
pigmentation,
have
fascinated
biologists
for
centuries,
yet
rarely
been
studied
in
deep
sea,
earth's
oldest
largest
light-limited
habitat.
Here,
we
investigate
evolutionary
shell
pattern,
eye
structure
across
a
family
deep-sea
gastropods
(Solariellidae).
We
show
that
within
our
phylogenetic
framework,
these
traits
evolves
without
reversal,
at
different
rates
(faster
than
structure),
over
depth
ranges.
Using
Bayesian
approach,
find
support
correlated
evolution
trait
with
increasing
dysphotic
region.
A
transition
occurs
pattern
400-500
m
pigmentation
600-700
m.
also
one
sighted,
shallow-water
species,
Ilanga
navakaensis,
which
may
represent
"best-case"
scenario
vision
family,
likely
has
poor
spatial
acuity
contrast
sensitivity.
therefore
propose
are
not
used
intraspecific
communication
but
important
camouflage
from
visual
predators,
low-resolution
solariellids
is
require
high
light
intensity
basic
tasks,
detecting
predators.
BMC Genomics,
Journal Year:
2019,
Volume and Issue:
20(1)
Published: June 8, 2019
The
pearl
oyster
Pinctada
fucata
martensii
(Pfu.),
widely
cultured
in
the
South
China
Sea,
is
a
precious
source
of
sea
pearls
and
calcifying
materials.
A
yellow
shell
variety
Pfu.
was
obtained
after
years
artificial
breeding.
To
identify
differentially
expressed
genes
between
normal
black
oysters,
we
performed
transcriptomic
sequencing
proteomic
analyses
using
mantle
edge
tissues.
Current Opinion in Genetics & Development,
Journal Year:
2020,
Volume and Issue:
69, P. 1 - 5
Published: Dec. 31, 2020
Recent
technical
innovations
are
revealing
surprising
patterns
in
mollusc
shell
pigmentation,
such
as
an
unexpectedly
modest
role
for
melanins
and
rapid
divergences
the
mix
of
pigments
used
to
achieve
similar
colour
patterns.
The
elucidation
molecular
genetic
basis
pigmentation
has
been
slow,
probably
because
high
genome
complexity
gastropods
bivalves.
work
within
old
field
evolutionary
ecology
allows
a
greater
analysis
large-geographic-scale
(sometimes
employing
citizen-science
data),
well
experimental
studies.
However,
remains
dominated
by
land
snails
model
organisms,
while
pattern
evolution
marine
bivalves,
particularly
those
not
exposed
visual
predators,
mysterious.
