Biology,
Journal Year:
2024,
Volume and Issue:
13(12), P. 1051 - 1051
Published: Dec. 15, 2024
The
fishery
biology
of
the
invasive
Atlantic
blue
crab
Callinectes
sapidus
in
Mediterranean
Sea
outside
eastern
sectors
basin
has
been
only
recently
investigated.
Here
we
studied
population
C.
Lesina
Lagoon
(Adriatic
Sea,
SE
Italy).
In
total,
838
crabs
were
captured
monthly
between
February
2021
and
January
2022
using
fyke
nets.
Abundances
varied
seasonally
with
catches
per
unit
effort
ranging
0
1.76
nets−1
d−1
winter
summer.
Spatial
abundances
estimated
summer
by
a
Carle–Strub
procedure
ranged
0.06
0.64
m−2.
sex
ratio
(♂/♀)
was
close
to
1:1;
males
prevailed
August
September;
ovigerous
females
occurred
from
April
August.
males’
size
at
morphological
maturity
smaller
than
(110.6–112.3
mm
vs.
122.1–123.1
mm).
Seasonal
von
Bertalanffy
growth
parameters
indicated
that,
compared
males,
showed
shorter
maximum
lifespan
(5
8
years),
higher
coefficient
K
(0.6
0.4
y−1)
performance
index
Ф’
(4.6
4.3),
while
sizes
CW∞
(237.8
232.6
mm)
seasonality
indices
C
(0.62
0.57)
similar.
Furthermore,
natural
fishing
mortalities
exploitation
rate.
We
discussed
results
present
study
context
available
literature
provide
valuable
basis
for
implementation
standardized
Mediterranean-scale
management
plans,
matching
sustainable
conservation
coastal
ecosystems.
Journal of Marine Science and Engineering,
Journal Year:
2024,
Volume and Issue:
12(11), P. 1923 - 1923
Published: Oct. 28, 2024
The
reproductive
biology
of
the
invasive
blue
crab
Callinectes
sapidus
was
studied
in
Thermaikos
Gulf
(Northwest
Aegean
Sea,
Eastern
Mediterranean).
In
two-year
survey,
5698
(2897♂/2801♀)
crabs
were
caught
with
use
fyke
nets.
Total
sex
ratio
(♂/♀)
reached
equality
(1.03:1).
female
exhibited
a
protracted
period.
Mature
and
ovigerous
females
exhibit
short
migratory
movements
from
estuarine
inshore
waters,
where
population
mostly
congregates
(0–3
m),
move
to
slightly
deeper
waters
(1–3
m)
up
9
m
for
spawning.
A
total
340
caught.
Their
number
varied
both
spatially
temporally;
they
observed
7-month
period
(April
October)
clear
peak
July–August
at
3
depth
gradient
corresponding
≈60%
years.
Size
first
sexual
maturity
(CW50)
estimated
113.1
mm
CW.
Average
fecundity
≈790,000
eggs.
Experimental
trawling
showed
that
(<1
estuaries
serve
as
nursery
areas
juveniles.
Defining
spatiotemporal
bathymetrical
distribution
any
invaded
coastal
habitat
could
be
considered
key
information
implementation
management
policy
species.
Biology,
Journal Year:
2024,
Volume and Issue:
13(12), P. 1051 - 1051
Published: Dec. 15, 2024
The
fishery
biology
of
the
invasive
Atlantic
blue
crab
Callinectes
sapidus
in
Mediterranean
Sea
outside
eastern
sectors
basin
has
been
only
recently
investigated.
Here
we
studied
population
C.
Lesina
Lagoon
(Adriatic
Sea,
SE
Italy).
In
total,
838
crabs
were
captured
monthly
between
February
2021
and
January
2022
using
fyke
nets.
Abundances
varied
seasonally
with
catches
per
unit
effort
ranging
0
1.76
nets−1
d−1
winter
summer.
Spatial
abundances
estimated
summer
by
a
Carle–Strub
procedure
ranged
0.06
0.64
m−2.
sex
ratio
(♂/♀)
was
close
to
1:1;
males
prevailed
August
September;
ovigerous
females
occurred
from
April
August.
males’
size
at
morphological
maturity
smaller
than
(110.6–112.3
mm
vs.
122.1–123.1
mm).
Seasonal
von
Bertalanffy
growth
parameters
indicated
that,
compared
males,
showed
shorter
maximum
lifespan
(5
8
years),
higher
coefficient
K
(0.6
0.4
y−1)
performance
index
Ф’
(4.6
4.3),
while
sizes
CW∞
(237.8
232.6
mm)
seasonality
indices
C
(0.62
0.57)
similar.
Furthermore,
natural
fishing
mortalities
exploitation
rate.
We
discussed
results
present
study
context
available
literature
provide
valuable
basis
for
implementation
standardized
Mediterranean-scale
management
plans,
matching
sustainable
conservation
coastal
ecosystems.
