The
Southern
Ocean
and
the
Antarctic
Circumpolar
Current
create
environmental
conditions
that
serve
as
an
efficient
barrier
to
prevent
colonization
of
non-native
species
(NNS)
in
marine
ecosystems
Antarctica.
However,
warming
increasing
number
transport
opportunities
are
reducing
physiological
physical
barriers,
chances
NNS
arriving.
aim
this
study
was
determine
limits
survival
juvenile
mussels,
M.
chilensis,
under
current
those
projected
climate
change.
These
assessments
were
used
define
mussels
potential
for
establishment
region.
Experimental
exposed
four
treatments:
-1.5
°C
(Antarctic
winter),
2
summer),
4
projected)
8
(control)
80
days
a
combination
transcriptomics
approaches
investigate
mussel
response.
molecular
responses
congruent
with
results,
revealing
tolerance
winter
temperatures.
higher
regulated
differentially
expressed
gene
(DEGs)
reported
temperatures
(-1.5
ºC).
This
associated
activation
biological
processes
apoptosis
(up
regulated)
both
cell
division
cilium
assembly
(down
regulated).
reduced
feeding
rate
negative
scope
growth,
large
part
exposure
period
at
°C,
suggests
represents
chilensis
from
Magellanic
region
settling
Antarctic.
Although
not
robust
Antarctica
thermal
conditions,
future
scenarios
likely
weaken
these
barriers.
results
strongly
suggest
West
Peninsula
could
become
Mytilus
distributional
range,
especially
dispersal
aided
by
maritime
activity
across
Ocean.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Jan. 18, 2023
Introduction
Marine
metal
contamination
caused
by
deep-sea
mining
activities
has
elicited
great
concern
from
both
social
and
scientific
communities.
Among
the
various
metals
organisms
might
encounter,
cadmium
(Cd)
is
a
widely
detected
that
in
very
small
amounts
nonetheless
capable
of
severe
toxicity.
Yet
due
to
remoteness
technical
challenges,
insights
into
effects
exposure
resulting
upon
are
limited.
Methods
Here,
we
investigated
Cd’s
toxicological
on
mussels
Gigantidas
platifrons
exposed
100
or
1000
g/L
Cd
for
7
days;
an
integrated
approach
was
used
incorporated
proteomics
metabolomics
along
with
traditional
approaches
(metal
concentrations,
subcellular
distribution,
anti-oxidative
immune-related
biochemical
indexes).
Results
Discussion
showed
significant
accumulation
mussel
gills
redistribution
among
compartments,
cellular
debris
being
primary
binding
site.
Although
enzymes
(superoxide
dismutase
catalase)
were
not
significantly
altered
groups,
markedly
increased
level
glutathione
S-transferase
via
proteomic
technique
clearly
evinced
suffered
oxidative
stress
under
exposure.
Besides,
acid
phosphatase
alkaline
assayed
methods
predominant
presence
largely
proteins
data
strongly
revealed
immune
response
Cd.
In
addition,
results
combined
those
non-targeted
demonstrated
could
exert
toxicity
disrupting
cytoskeleton
structure,
ion
homeostasis,
metabolisms
energy,
lipid,
nucleotide
mussels.
As
this
study,
can
be
tandem
provide
valuable
molecular
mechanisms
organisms’
helping
discover
potential
biomarkers
application
during
assessments.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Aug. 19, 2024
Increasing
seawater
temperatures
coupled
with
more
intense
and
frequent
heatwaves
pose
an
increasing
threat
to
marine
species.
In
this
study,
the
New
Zealand
green-lipped
mussel,
Perna
canaliculus,
was
used
investigate
effect
of
genetics
ontogeny
on
thermal
resilience.
The
culturally
economically
significant
mussel
P.
canaliculus
(Gmelin,
1971)
has
been
selectively-bred
in
for
two
decades,
making
it
a
unique
biological
resource
genetic
interactions
temperate
bivalve
Six
full
sibling
families
four
different
ages,
from
early
juveniles
(6,
8,
10
weeks
post-fertilisation)
sub-adults
(52
post-fertilisation),
were
experimentation.
At
each
age,
family
exposed
three-hour
heat
challenge,
followed
by
recovery,
survival
assessments.
shell
lengths
live
dead
juvenile
mussels
also
measured.
Gill
tissue
samples
collected
after
challenge
quantify
70
kDa
shock
protein
gene
(hsp70).
Results
showed
that
genetics,
size
influence
resilience
LT
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(17), P. 13641 - 13641
Published: Sept. 4, 2023
The
hard-shell
mussel
(Mytilus
coruscus)
is
widespread
in
the
temperate
coastal
areas
of
northwest
Pacific
and
holds
a
significant
position
shellfish
aquaculture
market
China.
However,
natural
resources
this
species
have
been
declining,
population
genetic
studies
M.
coruscus
are
also
lacking.
In
study,
we
conducted
whole-genome
resequencing
(WGR)
from
eight
different
latitudes
along
Chinese
coast
identified
total
25,859,986
single
nucleotide
polymorphism
(SNP)
markers.
Our
findings
indicated
that
diversity
Zhoushan
region
was
lower
compared
with
populations
other
regions.
Furthermore,
observed
evolutionary
tree
clustered
into
two
primary
branches,
Zhangzhou
(ZZ)
separate
branch.
ZZ
partly
isolated
regions,
but
distribution
branches
not
geographically
homogeneous,
nested
pattern
emerged,
consistent
differentiation
index
(FST)
results.
To
investigate
selection
characteristics,
utilized
northern
(Dalian
Qingdao)
central
(Zhoushan
Xiangshan)
as
reference
southern
target
population.
scan
analysis
several
genes
associated
thermal
responses,
including
Hsp70
CYP450.
These
may
play
important
roles
adaptation
to
living
environments.
Overall,
our
study
provides
comprehensive
understanding
genomic
China
valuable
resource
for
future
on
breeding
species.
