Influence of thermal effluent on biological traits of crabs in a recreational fishery
Journal of Thermal Biology,
Journal Year:
2025,
Volume and Issue:
130, P. 104150 - 104150
Published: May 1, 2025
Language: Английский
Capture Probability of Blue Swimmer Crab (Portunus armatus) in Baited Traps and Implications for Trap Survey Design
Fisheries Management and Ecology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 16, 2024
ABSTRACT
Fishery
independent
surveys
provide
valuable
data
for
fisheries
assessments
that
predominantly
rely
on
trends
in
catch
per
unit
effort
(CPUE).
Many
crustacean
are
harvested
using
traps,
so
this
gear
is
often
used
fishery
surveys.
The
areal
sampling
baited
traps
normally
poorly
understood,
can
be
biased
if
areas
overlap.
blue
swimmer
crab
(
Portunus
armatus
)
an
important
commercial
and
recreational
species
distributed
around
the
warm
temperate
tropical
coast
of
Australia,
stock
management
typically
relies
supplemented
by
Acoustic
telemetry
was
to
track
fine‐scale
movements
37
crabs
response
deployment
baited‐traps
estimate
probability
capture
relative
distance
from
trap.
Traps
attracted
initial
up
70
m,
with
most
towards
after
dark.
Capture
increased
decreasing
a
deployed
Despite
this,
<
50%
positioned
adjacent
trap,
which
could
lead
mismatch
between
abundance
proportion
catchable
varied
abundance.
Our
findings
reinforced
nocturnal
more
appropriate
species,
we
recommend
no
closer
than
140
m
apart.
also
demonstrated
utility
acoustic
informing
survey
designs
may
serve
as
template
other
trap
fisheries.
Language: Английский
Morphometrics and Reproductive Characteristics of the Freshwater Crab Sartoriana spinigera from the Habitat of Ratargul Swamp Forest, Bangladesh: An Approach to Conservation
Scientifica,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
A
total
of
332
freshwater
crab
Sartoriana
spinigera
samples
were
collected
for
eight
consecutive
months
from
the
Ratargul
swamp
forest,
Bangladesh,
to
examine
their
general
morphometrics
and
reproductive
traits.
The
length‐weight
relationships
carapace
weight
with
length,
width,
depth
indicated
negative
allometric
growth.
logarithmic
relationship
between
exhibited
a
correlation
value
0.86,
0.79,
0.56,
respectively.
Fulton’s
condition
factor
found
be
highest
in
March
lowest
October.
sex
ratio
was
1.59
:
1
male
female,
which
did
not
show
considerable
divergence
expected
chi‐square
test
(
P
<
0.05).
In
July,
maximum
mature
individuals
investigated.
fertilization
1297
±
629
ova,
ovary
447.22
359.39
mg,
egg
diameter
375.15
130.18
µ
m.
Histological
analysis
showed
that
hepatopancreas
well
organized
decomposition
reported
female
during
vitellogenic
stages
ovary.
Spermatogonium
cells
gonad,
gonad
stage.
conclusion,
research
will
serve
as
foundation
future
work
on
species
conservation
maintenance
ecological
balance
this
forest.
Language: Английский