Hydrobiologia,
Год журнала:
2023,
Номер
851(6), С. 1475 - 1488
Опубликована: Ноя. 3, 2023
Abstract
Fisheries
of
the
Mekong
Basin
are
crucial
to
regional
food
security.
They
rely
on
seasonal
monsoon
rains
that
inundate
rice
fields
and
reconnect
water
bodies.
Species
assemblages
vary
over
time
space,
but
infrastructure
developments
climate
change
negatively
impacting
timing
magnitude
flood
pulse
as
well
fish
migration
routes
populations.
In
lowland
field
landscapes
Cambodia,
community
refuges
(CFRs)
used
maintain
abundance
biodiversity,
with
varying
success.
There
is
little
knowledge
drivers
this
variation
guide
management
interventions.
We
beta
diversity
explore
effectiveness
40
CFRs
in
maintaining
species
during
dry
seasons
from
2012
2015.
Results
show
CFR
connectivity
floodplain
important
suggest
type
inlet/outlet
influences
retention.
connected
a
large
area
wet
season
had
lower
losses
through
season.
However,
CFRs,
or
those
part
larger
body
water,
higher
abundance.
Key
design
features
must
be
coupled
strong
capacity
conservation
fisheries
strategy
Basin.
Fisheries Management and Ecology,
Год журнала:
2022,
Номер
29(5), С. 708 - 723
Опубликована: Июнь 2, 2022
Abstract
Fish
often
migrate
to
feed,
reproduce
and
seek
refuge
from
predators
prevailing
environmental
conditions.
As
a
result,
migration
tactics
vary
among
species
based
on
diversity
of
life
history
needs,
although
variation
within
is
increasingly
being
recognised
as
important
population
resilience.
In
this
study,
within‐
among‐species
in
migratory
six
Mekong
fish
genera
was
examined
using
otolith
microchemistry
explore
diadromous
potamodromous
traits.
Two
were
catadromous
one
an
estuarine
resident,
while
the
remaining
three
facultative
their
strategies,
with
up
four
single
species.
Migrant
resident
contingents
co‐existed
same
Management,
conservation
mitigation
strategies
that
maintain
connectivity
large
tropical
rivers,
such
effective
fishway
design,
should
consider
at
individual
level
for
improved
outcomes.
Fisheries Research,
Год журнала:
2024,
Номер
274, С. 106995 - 106995
Опубликована: Март 13, 2024
The
Mekong
River
has
the
largest
inland
fishery
in
world
but
is
threatened
by
planned
mainstem
hydropower
developments
that
could
impact
fish
migration
patterns.
Here
we
provide
direct
evidence
of
long-distance
migrations
along
Hypsibarbus
malcomi,
one
10
most
important
species
fishery.
included
a
354
km
passage
through
current
and
three
proposed
developments.
We
tagged
released
233
wild
fish,
including
77
H.
malcomi
with
Passive
Integrated
Transponder
(PIT
tags)
near
capital
Vientiane
April
2022.
Five
PIT
malcolmi
were
detected
at
top
Xayaburi
plant
ladder
within
15
months
being
Vientiane.
Our
findings
empirically
demonstrate
this
undertakes
long
distance
main
stem
therefore
suitable
facilities
will
need
to
be
incorporated
meet
their
migratory
needs.
also
value
independent
efficient
monitoring
technology,
such
as
tagging,
assess
patterns
face
upcoming
Lower
Basin.
Fisheries Research,
Год журнала:
2024,
Номер
279, С. 107133 - 107133
Опубликована: Авг. 3, 2024
Ariid
catfishes
(Ariidae
family)
are
important
migratory
fish
species
in
the
Mekong
River,
with
some
representing
a
major
harvest
component
from
river.
Limited
biological
information
exists,
and
particular
their
migration
patterns
not
well
understood.
This
study
examined
life
history
strategies
of
three
abundant
ariid
(Cephalocassis
borneensis,
Arius
maculatus,
Osteogeneiosus
militaris)
River
using
otolith
chemistry.
Multiple
trace
elements
sections
were
quantified
two
analytical
techniques:
Laser
Ablation
–
Inductively
Coupled
Plasma
Mass
Spectrometry
X-ray
fluorescence
microscopy.
We
found
that
83
%
C.
borneensis
samples
completed
cycle
exclusively
fresh
water
while
17
this
occasionally
higher
salinity
(brackish)
waters.
The
other
(A.
maculatus
O.
generally
occupied
(estuary
coastal)
areas,
but
demonstrated
complex
up
to
observed
(including
both
residents
migrants).
With
such
strategies,
management
conservation
interventions
challenge
for
these
species.
Ecology and Evolution,
Год журнала:
2023,
Номер
13(2)
Опубликована: Фев. 1, 2023
Abstract
Population
genetic
structure
of
migratory
fishes
can
reflect
ecological
and
evolutionary
processes.
Pangasius
krempfi
is
a
critically
important
anadromous
catfish
in
the
Mekong
River,
its
migration
pathways
have
attracted
much
interest.
To
investigate,
we
quantified
diversity
this
species
using
control
region
(D‐loop)
Cytochrome
b
(Cyt
)
mitochondrial
genome.
Fish
were
sampled
(
n
=
91)
along
tributaries
from
upstream
to
estuaries
coastal
areas
Delta
compared
three
samples
Pakse
(Laos).
The
D‐loop
haplotype
(0.941
±
0.014)
nucleotide
(0.0083
0.0005)
high
all
populations,
but
that
Cyt
was
low
(0.331
0.059
0.00063
0.00011,
respectively).
No
difference
detected
between
indicating
strong
gene
flow
confirming
long
distance
for
species.
not
genetically
structured
according
geographical
populations
delineated
into
haplogroups,
suggesting
multiple
lineages.
presence
haplogroups
each
sampling
location
implies
downstream
random
parallel
when
fish
enter
two
river
bifurcating
main
River.
Individuals
also
migrate
coast,
far
estuaries,
longer
path
than
previously
reported,
which
crucial
maintaining
diverse
origin
P.
.
Frontiers in Marine Science,
Год журнала:
2023,
Номер
10
Опубликована: Фев. 27, 2023
Introduction
The
waters
surrounding
the
Wanshan
Islands
are
important
traditional
fishing
grounds
in
China,
with
rich
habitat
types.
Acanthopagrus
latus
is
an
economically
species
this
area;
however,
distribution
of
its
spawning
and
use
patterns
remain
unknown.
Methods
Thus
100
otolith
samples
A.
were
collected
from
three
geographic
areas
(MW:
Qi’ao
Island
Mangrove
Water
Habitat;
OW:
Yamen
Estuary
Oyster
Farm
RW:
Dong’ao-Guishan
Reef
Habitat),
concentrations
Sr
Ca
along
shortest
axis
vertical
annual
or
lunar
rings
measured
to
span
entire
life
cycle
,
core
edge
corresponding
environmental
characteristics
at
birth
capture,
respectively.
Results
discussion
Analysis
covariance
(ANCOVA)
revealed
that
ratios
Sr/Ca
edges
RW
significantly
higher
than
those
OW
MW
samples;
both
values
ratio
cores
comparable
samples.
Cluster
analysis
non-metric
multidimensional
scaling
(nMDS)
indicated
juvenile
stage,
individuals
two
main
clusters
belonged
same
cluster.
There
was
no
significant
difference
between
Therefore,
area
thought
have
originated
low
medium-salinity
mangroves
oyster
farm
habitats
Pearl
River
Estuary.
found
distinct
habitat-use
patterns:
1)
Marine
Resident
(7.2%
sampled
fish)
fish
marine
for
life;
2)
Migrant
(16.4%
juveniles
inhabit
moderate
salinity
migrate
as
they
grow;
3)
Estuarine
Visitor
(76.4%
repeated
migration
habitats.
This
suggests
widespread
estuarine
throughout
ontogeny.
plasticity
protection
should
be
considered
future
fisheries
management
because
Latus
has
been
victim
overexploitation
resources.
Pacific Conservation Biology,
Год журнала:
2023,
Номер
30(1)
Опубликована: Апрель 17, 2023
Context
Rapid
human
population
growth
has
increased
demand
for
water
supply,
food
security,
electricity,
and
flood
mitigation
worldwide.
To
address
these
challenges,
governments
have
invested
heavily
in
the
expansion
of
infrastructure.
However,
there
is
substantial
evidence
that
globally,
this
infrastructure
impacts
aquatic
ecosystems
can
a
significant
impact
on
persistence
fish
species.
Despite
being
well
understood
dams
been
given
scant
attention
Indonesia.
Thus,
considerations
are
rarely
included
river
development
planning
frameworks.
Methods
document
riverine
barriers
Indonesian
freshwater
fish,
we
surveyed
multiple
sites,
using
three
different
kinds
gear
(gillnets,
castnets,
bait
traps),
upstream
downstream
Perjaya
Dam
Komering
River.
Key
results
The
study
revealed
13
36
species
were
found
only
dam
five
above
dam.
There
differences
community
composition
between
regions
either
abundance
(Pseudo-F
=
4.495,
d.f.
1,
P
<
0.05),
richness
15.837,
0.05)
or
diversity
as
response
metrics
8.3256,
0.05).
Conclusions
local
extirpation
many
from
areas
suggests
hinders
migration.
Implications
containing
fishway,
indicate
not
successfully
recolonising
reaches.
