Biology,
Journal Year:
2023,
Volume and Issue:
12(3), P. 409 - 409
Published: March 6, 2023
Ammonia
is
a
significant
concern
during
hatchery
culture
in
brachyuran
species,
and
its
accumulation
may
lead
to
abortive
moulting
large-scale
deaths
of
the
early
juveniles.
To
date,
underlying
mechanism
for
ammonia-induced
alteration
process
still
unknown.
In
this
study,
we
aimed
investigate
effects
ammonia
on
as
well
potential
mechanisms
juveniles
swimming
crab
Portunus
trituberculatus,
an
important
aquaculture
species
China.
We
evaluated
survival
rate
juvenile
crabs
(C2)
analyzed
expression
pattern
genes
key
components
molt
signaling
complete
cycle
under
different
concentrations
nitrogen
(the
control
group:
<0.1
mg/L;
LA
5
HA
20
mg/L).
The
results
showed
that:
(1)
groups
was
lower
than
that
group
at
end
experiment,
death
syndrome
(MDS)
only
observed
group;
(2)
higher
compared
(3)
consistent
with
MIH
decreased
expression,
related
ecdysteroid
synthesis,
receptors,
responsive
effectors
exhibited
increased
(4)
although
upregulated,
associated
receptors
downstream
group.
Our
indicated
low
levels
can
promote
by
inhibiting
activating
moult
signaling,
whereas
high
inhibit
MDS
through
impairing
signaling.
Animals,
Journal Year:
2024,
Volume and Issue:
14(3), P. 411 - 411
Published: Jan. 26, 2024
Through
a
30-day
experiment,
this
study
investigated
the
effects
of
five
photoperiods
(0L:24D,
6L:18D,
12L:12D,
18L:6D,
and
24L:0D)
on
survival,
enzyme
activity,
body
color,
growth-related
gene
expression
redclaw
crayfish
(Cherax
quadricarinatus)
juveniles.
The
results
showed
that
C.
quadricarinatus
juveniles
under
18L:6D
24L:0D
exhibited
highest
survival
rate,
which
was
significantly
higher
than
rates
other
three
(p
<
0.05).
However,
0L:24D
group
had
final
weight
gain
surpassing
those
groups
Regarding
activity
hormone
levels,
photoperiod
relatively
superoxide
dismutase
(SOD),
acid
phosphatase
(ACP),
lysozyme
(LZM)
enzymes
photoperiods,
but
their
levels
melatonin
cortisol
were
low.
In
addition,
malondialdehyde
(MDA)
content.
Analysis
revealed
retinoid
X
receptor
(RXR)
α-amylase
(α-AMY)
genes
in
four
With
increasing
daylight
exposure,
color
changed
from
pale
blue
to
yellow–brown.
summary,
achieved
high
rates,
good
growth
performance,
strong
antioxidant
stress
response,
immune
defense
capabilities
an
18
h
photoperiod.
Therefore,
industrial
seedling
cultivation
crayfish,
it
is
recommended
provide
daily
light.
Further,
demonstrated
ability
manipulate
through
controlled
artificial
photoperiods.
These
findings
essential
technical
parameters
needed
for
Frontiers in Physiology,
Journal Year:
2022,
Volume and Issue:
13
Published: May 25, 2022
Macrobrachium
nipponense
is
an
economically
important
prawn
species
and
common
in
Chinese
inland
capture
fisheries.
During
aquaculture,
M.
can
survive
under
freshwater
low
salinity
conditions.
The
molecular
mechanism
underlying
the
response
to
acclimation
remains
unclear
this
species;
thus,
study,
we
used
Illumina
RNA
sequencing
platform
for
transcriptome
analyses
of
gill
hepatopancreas
tissues
exposed
stress
[0.4‰
(S0,
control
group),
6‰
(S6,
12‰
(S12,
high
group)].
Differentially
expressed
genes
were
identified,
several
adaptation-related
terms
signaling
pathways
found
be
enriched,
such
as
“ion
transport,”
“oxidative
phosphorylation,”
“glycometabolism.”
Quantitative
real-time
PCR
demonstrated
participation
12
key
osmotic
pressure
regulation
acute
stress.
Further,
role
carbonic
anhydrase
was
investigated
by
subjecting
situ
hybridization.
Collectively,
results
reported
herein
enhance
our
understanding
mechanisms
via
which
adapts
changes
salinity.
