Global
changes
can
profoundly
affect
the
sex
determination
and
reproductive
output
of
marine
organisms,
disrupting
population
structure
ecosystems.
High
CO2driven
low
pH
in
context
ocean
acidification
(OA)
has
been
shown
to
severely
various
calcifiers,
but
less
is
known
about
extent
which
influences
reproduction
particularly
mollusks.
This
study
first
report
a
biased
ratio
over
multiple
generations
toward
females,
driven
by
exposure
high
CO2-induced
environments,
using
ecologically
economically
important
Portuguese
oyster
(Crassostrea
angulata)
as
model.
phenomenon,
we
term
pH-mediated
(PSD),
no
consequences
for
fecundity,
gonadal
development,
or
function
offspring.
Moreover,
PSD
persisted
into
second
year
was
inherited
across
generations.
Transcriptomic
analysis
indicates
associated
with
activation
Wnt
signaling
pathway
females
inhibition
spermiogenesis-related
functions
males.
work
expands
our
understanding
environmental
highlights
possible
impact
global
on
dynamics
mollusks
other
organisms.
Current Zoology,
Journal Year:
2024,
Volume and Issue:
10(1)
Published: Jan. 1, 2024
Abstract
Ocean
acidification
significantly
affects
marine
calcifiers
like
oysters,
warranting
the
study
of
molecular
mechanisms
DNA
methylation
that
contribute
to
adaptive
plasticity
in
response
environmental
change.
However,
a
consensus
has
not
been
reached
on
extent
which
modules
gene
expression,
and
turn
plasticity,
invertebrates.
In
this
study,
we
investigated
impact
pCO2
expression
eastern
oyster,
Crassostrea
virginica.
After
30-day
exposure
control
(572
ppm)
or
elevated
(2827
ppm),
whole-genome
bisulfite
sequencing
(WGBS)
RNA-seq
data
were
generated
from
adult
female
gonad
tissue
male
sperm
samples.
Although
differentially
methylated
loci
(DMLs)
identified
females
(89)
males
(2916),
there
no
expressed
genes
only
one
transcript
females.
body
impacted
other
forms
activity
sperm,
such
as
maximum
number
transcripts
per
changes
predominant
expressed.
Elevated
increased
variability
(transcriptional
noise)
but
decreased
noise
females,
suggesting
sex-specific
role
regulation.
Functional
annotation
with
transcript-level
containing
DMLs
revealed
several
enriched
biological
processes
potentially
involved
response,
including
apoptotic
pathways
signal
transduction,
well
reproductive
functions.
Taken
together,
these
results
suggest
may
regulate
maintain
homeostasis
conditions
could
play
key
resilience
Marine Biology,
Journal Year:
2024,
Volume and Issue:
172(1)
Published: Dec. 6, 2024
Abstract
Ocean
warming
and
acidification
are
a
threat
to
calcifying
marine
invertebrates
such
as
Echinoderms.
Transgenerational
plasticity
may
allow
animals
respond
these
conditions,
but
few
studies
exposing
climate
stressors
over
multiple
generations
exist.
Here,
data
from
the
final
(
F
2
post-settlement,
3
larvae
juveniles)
in
long-term
(>
6
yrs)
experiment
on
tropical
sea
urchin
Echinometra
sp.
A
.
This
commenced
with
wild
collected
0
generation)
subsequent
(larvae
adults
both
for
1
)
control
(present-day
ambient)
change
(CC)
conditions
(2
°C
above
ambient
temperatures,
940
ppm
p
CO
).
Survivorship
all
treatments
(ranging
being
held
at
elevated
conditions)
was
high
50%).
Some
significant
differences
survivorship
existed
among
treatments,
although
there
no
apparent
relationship
CC
exposure
time.
There
also
difference
size
treatment
groups
urchins
up
720d
post-settlement.
As
previous
generations,
largest
effect
that
males
exposed
have
reduced
reproductive
potential,
negative
number
of
future
ocean
spawning
performance.
Effects
were
extreme,
we
could
only
raise
treatment,
or
those
individuals
kept
0.5
(only
under
conditions).
Larvae
parental
reached
settlement
when
raised
conditions.
Larval
morphology
responded
(reduced
arm
length
exhibited
effects
(smaller
body
lengths
parents
Thus,
observed
earlier
publications
did
not
diminish
following
but,
some
traits,
increased.
We
therefore
detected
evidence
transgenerational
acclimation
Ege Journal of Fisheries and Aquatic Sciences,
Journal Year:
2024,
Volume and Issue:
41(4), P. 273 - 279
Published: Dec. 11, 2024
This
study
investigated
the
seasonal
variations
of
polonium-210
(²¹⁰Po)
activity
concentrations
in
two
marine
invertebrate
species:
Mediterranean
limpet
(P.
caerulea)
and
sea
urchin
lividus).
Seasonal
sample
collection
was
conducted
across
three
Aegean
Sea
Marmara
coastal
stations
from
December
2018
to
October
2019.
The
included
İzmir-Urla,
Karaburun,
İstanbul
Island-Kınalıada.
To
assess
size-dependent
bioaccumulation
²¹⁰Po,
individuals
were
categorized
into
size
groups.
both
species
exhibited
fluctuations,
ranging
4.9
±
3.4
Bq
kg⁻¹
dry
weight
28.0
8.4
limpets
8.7
6.1
58.0
18.5
urchins.
highest
²¹⁰Po
consistently
observed
spring
all
sampling
locations.
West Kazakhstan Medical Journal,
Journal Year:
2024,
Volume and Issue:
66(4), P. 343 - 364
Published: Dec. 20, 2024
Saccostrea
cucullata,
a
species
of
bivalve
mollusk
native
to
the
Persian
Gulf,
is
highly
prized
for
its
nutritional
richness
and
rapid
growth,
making
it
valuable
aquaculture.
Despite
abundance
potential
in
aquaculture
industry
has
faced
challenges
due
limited
understanding
biology
genetics.
This
review
consolidates
current
knowledge
on
life
cycle,
reproduction,
environmental
factors
influencing
growth
quality
cucullata.
It
examines
impact
climate
variations
identifies
key
challenges.
Strategies
such
as
closed-system
cultivation,
selective
breeding,
genetic
enhancement
aimed
at
producing
triploid
oysters
are
discussed,
focusing
improving
desirable
traits
rate,
disease
resistance,
content.
Enhancing
these
aspects
can
lead
increased
production
nutrient-rich
thereby
advancing
benefits
sustainability
Global
changes
can
profoundly
affect
the
sex
determination
and
reproductive
output
of
marine
organisms,
disrupting
population
structure
ecosystems.
High
CO2driven
low
pH
in
context
ocean
acidification
(OA)
has
been
shown
to
severely
various
calcifiers,
but
less
is
known
about
extent
which
influences
reproduction
particularly
mollusks.
This
study
first
report
a
biased
ratio
over
multiple
generations
toward
females,
driven
by
exposure
high
CO2-induced
environments,
using
ecologically
economically
important
Portuguese
oyster
(Crassostrea
angulata)
as
model.
phenomenon,
we
term
pH-mediated
(PSD),
no
consequences
for
fecundity,
gonadal
development,
or
function
offspring.
Moreover,
PSD
persisted
into
second
year
was
inherited
across
generations.
Transcriptomic
analysis
indicates
associated
with
activation
Wnt
signaling
pathway
females
inhibition
spermiogenesis-related
functions
males.
work
expands
our
understanding
environmental
highlights
possible
impact
global
on
dynamics
mollusks
other
organisms.
