Integrative biomonitoring in Litopenaeus vannamei: Metal analysis and biochemical markers
Marine Pollution Bulletin,
Год журнала:
2025,
Номер
212, С. 117544 - 117544
Опубликована: Янв. 14, 2025
Язык: Английский
Is the concentration of heavy metals in sun-dried Engraulicypris sardella (Günther, 1868) in Malawi, a human health risk?
Environmental Chemistry and Ecotoxicology,
Год журнала:
2024,
Номер
6, С. 354 - 362
Опубликована: Янв. 1, 2024
The
effects
of
trophic
cascades
have
made
small-size
pelagic
fish
species,
such
as
Engraulicypris
sardella,
from
Lake
Malawi
an
important
ecological
and
food
system.
However,
human-induced
activities
can
potentially
pollute
exposing
E.
sardella
to
heavy
metals
contamination.
This
could
pose
a
system
health
risk
the
population
Malawians
neighboring
countries,
which
heavily
rely
on
source
animal
protein.
Therefore,
this
study
investigated
concentration
levels
Lead
(Pb),
Cadmium
(Cd),
Zinc
(Zn),
Copper
(Cu),
Manganese
(Mn),
Iron
(Fe)
in
sun-dried
conducted
assessment
associated
with
its
consumption.
samples
were
collected
Karonga,
Nkhata
Bay,
Nkhotakota,
Salima,
Mangochi
districts
between
December
2023
February
2024.
results
revealed
significant
variations
Cd,
Zn,
Cu,
Mn,
Fe
concentrations
among
sampled
sites
while
Pb
contamination
was
not
detected.
within
acceptable
consumption
limits
set
by
Food
Agriculture
Organization
(FAO)
World
Health
(WHO)
2012.
fish's
average
Cd
(0.17
mg
kg−1
ww)
slightly
above
recommended
threshold
0.1
ww
FAO/WHO
(2012)
but
remained
below
limit
0.5
FAO
1983.
Furthermore,
none
analyzed
posed
effect
people.
there
is
need
for
regular
monitoring
metal
other
mostly
consumed
species
Malawi,
both
fresh
processed,
sustained
guarantee
safety
consumers.
Язык: Английский
Status of phytoplankton biomass and physico-chemical parameters of water during fish cage culture fallowing: a case study of Southeast Arm of Lake Malawi
Journal of Freshwater Ecology,
Год журнала:
2024,
Номер
40(1)
Опубликована: Дек. 23, 2024
The
prospect
of
using
fallowing
as
an
ecosystem
management
measure
to
restore
functions
in
disturbed
aquatic
environments
under
cage
culture
was
evaluated
this
study.
aquaculture
site
the
Southeast
arm
Lake
Malawi
studied
following
abandonment
activities
2022
after
18
years
operation.
A
Hydrolab
CTD
MS5
series
probe
cast
at
each
station
a
maximum
depth
collect
electronic
data
and
provide
situ
profiles
temperature,
dissolved
oxygen,
oxygen
saturation,
pH
salinity.
Chlorophyl-extraction
done
mixture
acetone
methanol
analyzed
on
turner
10
fluorometer.
study
found
that
physical-chemical
parameters
such
pH,
ammonia,
turbidity
were
not
significantly
different
(p
>
0.05)
across
non-cage
sites
between
seasons.
However,
ammonia
levels
recorded
lower
than
values
reported
during
operations
period,
indication
some
recovery
processes
are
happening
site.
Chlorophyl
level
be
insignificantly
higher
0.0.5)
season
<
0.05).
High
Chl-a
observed
independent
but
might
linked
external
inputs
associated
with
tributaries
they
collectively
drain
into
lake.
directly
correlated
followed
by
total
suspended
solids
pH.
Overall,
is
undergoing
respect
abandonment,
effect
masked
nutrients
Lake.
Although
confirmed
oligotrophic
status
lake,
increasing
alarming
calls
for
inclusion
watershed
agriculture
environmental
programming
sustainably
safeguard
health
Язык: Английский