The
spatial
distribution
of
heavy
metals
in
the
sediments
(Cd,
Co,
Cu,
Pb,
Hg,
Ni,
Zn,
Fe,
and
Cr)
Eastern
coastline
India
was
evaluated.
sampling
done
from
61
sites
across
1400
km
stretch
Bay
Bengal
Arabian
Sea
coastline.
metal
concentration
higher
for
Hg
(0.08
µg/gm)
Cd
(3.44
than
other
trace
Utkal
Coromandel
metals,
Cr
were
under
concentrations
proposed
by
SQGs
are
included
categories
<
TEL,
ELR,
EMR
do
not
exceed
>
PEL
categories.
fractionation
carried
out
considering
mean
effects
range
median,
probable
effect
level,
toxic
ecological
risk,
pollution
load
modified
contaminate.
BioInvasions Records,
Journal Year:
2024,
Volume and Issue:
13(2), P. 437 - 451
Published: Jan. 1, 2024
The
Pacific
oyster
(Crassostrea
gigas)
is
an
important
commercial
species
introduced
to
Mexico
in
the
1970s
for
aquaculture
production.A
purportedly
infertile
triploid
variety
of
this
was
authorized
farming
El
Vizcaino
Biosphere
Reserve
(EVBR),
generate
economic
benefits
local
residents
while
at
same
time
avoiding
offsite
propagation.Nevertheless,
presence
oysters
Ojo
de
Liebre
lagoon,
a
core
area
reserve,
has
been
observed.To
test
occurrence
C.
gigas
beyond
its
rearing
areas,
240
were
collected
from
10
sites
lagoon
and
analyzed
on
basis
morphology
with
mitochondrial
cytochrome
oxidase
subunit
I;
these
approaches
positively
identified
95
70
specimens
respectively,
corroborating
existence
individuals
living
outside
areas
zone
reserve.Histological
examinations
discovered
gonads
different
stages
maturity
(including
spawning),
verifying
that
free-ranging
reproductively
active.We
propose
three
hypotheses
how
colonization
took
place
EVBR:
recruitment
larvae
unknown
nearby
populations,
inadvertent
introduction
diploid
organisms
facilities,
possibility
growing
hatcheries
have
produced
viable
gametes.Although
should
be
considered
as
population
size
small,
mostly
settled
artificial
substrata
do
not
cover
large
bottom,
there
no
evidence
ecological
damage
or
substitution
resident
species.We
suggest
first
EVBR,
collaborative
work
reserve
managers
producers
address
invasion
minimize
potential
negative
effects
ecosystems,
well
possible
dispersal
other
areas.
Journal of Trace Elements and Minerals,
Journal Year:
2024,
Volume and Issue:
9, P. 100175 - 100175
Published: June 9, 2024
Metal
pollution
is
a
problem
in
many
parts
of
the
world.
These
metals
can
be
harmful
when
they
exceed
recommended
limits.
This
study
aimed
to
assess
levels
cadmium
(Cd),
mercury
(Hg),
and
lead
(Pb)
tissues
oysters
(Crassostrea
virginica)
within
protected
area
southeastern
Mexico.
Additionally,
conduct
risk
analysis
for
human
health
associated
with
these
metals.
It
anticipated
that
observed
metal
will
lower
compared
prior
studies,
thereby
not
posing
significant
local
population.
The
tissue
oyster
samples
was
treated
under
techniques
Official
Mexican
Standards
analyzed
using
atomic
absorption
spectroscopy.
concentrations
were
used
calculate
estimated
daily
intakes
(EDI),
target
hazard
quotients
(THQ),
index
(HI),
cancer
risks
(TR),
children
adults.
Maximum
values
Cd
(1.99
μg
g−1),
exceeded
permissible
limits
Standards.
Pb
(0.99
g−1)
Hg
(0.64
are
THQ
HI
Cd,
Pb,
than
United
States
Environmental
Protection
Agency
(US-EPA)
criteria.
Based
on
our
results,
whether
consumption
adults
reducing
children;
diminish
exposure
Hg.
The
proposed
comprehensive
study
was
accomplished
to
analyze
the
ecological
phenomenon,
heavy
metals
occurrence,
and
its
significance.
spatial
distribution
of
in
sediments
(Cd,
Co,
Cu,
Pb,
Hg,
Ni,
Zn,
Fe,
Cr)
Eastern
coastline
India
evaluated.
sediment
sampling
done
from
61
sites
across
1400
km
stretch
Bay
Bengal
Arabian
Sea
coastline.
metal
concentration
higher
for
Hg
(0.08
µg/gm)
Cd
(3.44
than
other
trace
Utkal
Coromandel
metals,
Cr
were
under
concentrations
by
quality
guidelines
(SQGs)
are
included
categories
<
TEL,
ELR,
EMR
do
not
exceed
>
PEL
categories.
fractionation
carried
out
considering
mean
effects
range
median
fraction
(
,
probable
effect
level
toxic
risk
pollution
load
modified
contaminate
which
signifies
progressive
percentage
probability
aquatic
ecosystem.
Some
(UC
14-UC
18)
(CC
8-CC
11)
Mahanadi
Cauvery
River
basins
exhibited
stations
Utkal,
Andhra
The
spatial
distribution
of
heavy
metals
in
the
sediments
(Cd,
Co,
Cu,
Pb,
Hg,
Ni,
Zn,
Fe,
and
Cr)
Eastern
coastline
India
was
evaluated.
sampling
done
from
61
sites
across
1400
km
stretch
Bay
Bengal
Arabian
Sea
coastline.
metal
concentration
higher
for
Hg
(0.08
µg/gm)
Cd
(3.44
than
other
trace
Utkal
Coromandel
metals,
Cr
were
under
concentrations
proposed
by
SQGs
are
included
categories
<
TEL,
ELR,
EMR
do
not
exceed
>
PEL
categories.
fractionation
carried
out
considering
mean
effects
range
median,
probable
effect
level,
toxic
ecological
risk,
pollution
load
modified
contaminate.
