Forecasting air temperature and rainfall in Mymensingh, Bangladesh with ARIMA: Implications for aquaculture management
The Egyptian Journal of Aquatic Research,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 1, 2025
Язык: Английский
Fish Assemblage Diversity of Dharla River, Bangladesh, With Relation to Environmental Variables: A Multivariate Analysis
River Research and Applications,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 24, 2025
ABSTRACT
The
Dharla
River
is
a
significant
freshwater
system
that
runs
through
Bangladesh,
India,
and
Bhutan,
eventually
meeting
the
Brahmaputra
harboring
numerous
fish
species.
study
aimed
to
investigate
assemblage
structures
of
in
relation
seasons
environmental
variables.
Monthly
data
on
assemblages
variables
were
collected
from
five
sites
along
between
July
2022
June
2023.
One‐way
ANOVA
was
conducted
at
5%
significance
level
assess
seasonal
fluctuations
variables,
abundance,
diversity
indices.
Various
multivariate
analyses,
including
canonical
correspondence
analysis
(CCA),
principal
component
(PCA),
NMDS
plot,
used
examine
relationships
species
abundances,
their
variations.
Furthermore,
similarity
(ANOSIM)
percentage
(SIMPER)
applied
evaluate
communities
throughout
identify
key
cause
diversity.
parameters
showed
distinct
differences
during
monsoon
(July–October)
compared
pre‐monsoon
(March–June)
post‐monsoon
(November–February).
Seventy‐nine
reported
selected
over
12
months,
representing
eight
orders,
25
families,
57
genera.
Fish
abundance
peaked
season,
while
lowest
number
observed
pre‐monsoon.
ANOSIM
revealed
statistically
variation
(
p
<
0.05)
across
seasons.
Additionally,
SIMPER
indicated
an
average
dissimilarity
43.35%
among
three
seasons,
with
two
Esomus
danricus
Cirrhinus
reba
)
contributing
most
this
dissimilarity.
Based
samples
all
found
be
divided
into
groups.
indices,
Shannon‐Weaver
H
),
Pielou's
evenness
e
Margalef
richness
D
exhibited
variations
ranging
3.53
4.05,
0.60
0.82,
9.31
10.66,
respectively.
identified
temperature,
pH,
nitrite,
dissolved
oxygen
positively
correlated
structure
River.
This
provides
baseline
information
relationship
which
crucial
for
sustainable
management
conservation
important
trans‐boundary
Rivers
like
other
open‐water
fishery
resources
Bangladesh.
Язык: Английский
Impact of Climatic Factors on Water Quality Parameters in Tilapia Broodfish Ponds and Predictive Modeling of Pond Water Temperature with ARIMAX
Heliyon,
Год журнала:
2024,
Номер
10(18), С. e37717 - e37717
Опубликована: Сен. 1, 2024
Climate
change
represents
a
considerable
threat
to
aquatic
ecosystems,
potentially
affecting
various
water
quality
parameters.The
study
aims
assess
the
impacts
climatic
factors
on
parameters
in
tilapia
broodfish
pond
and
forecasting
of
temperature
using
ARIMAX
model.
Daily
longitudinal
time
series
data
were
collected
from
pond,
while
monthly
obtained
Bangladesh
Meteorological
Department.
Water
exhibited
seasonal
variation,
peaking
at
31.23
°C
October
dropping
20.8
December.
pH
levels
ranged
7.36
10.32,
with
lowest
recorded
December
highest
August.
Dissolved
oxygen
varied
7.09
mg/L
10.65
mg/L,
September
January.
Ammonia
February
0.33
mg/L.
transparency
15.37
28
inches,
January
June.
Climatic
significantly
influenced
these
variations,
as
specified
by
Canonical
correlation
analysis
(CCA).
The
best-fitting
model,
(1,
0,
1),
indicated
fluctuating
trend
important
exogenous
like
air
solar
intensity.
By
end
2025,
is
expected
rise
27.93
°C.
This
noticeable
increase
started
November
These
higher
temperatures
may
improve
growth
development
earlier.
But
are
predicted
drop
March,
which
could
negatively
affect
development.
A
clear
pattern
future.
findings
provide
insights
for
researchers,
policymakers,
academics,
those
involved
farming.
considering
intensity
planning,
stakeholders
can
better
anticipate
future
conditions.
Developing
adaptive
management
strategies
reduce
negative
make
most
favorable
conditions
will
be
essential
sustainable
production
context
climate
change.
Язык: Английский