Journal of Fish Biology,
Journal Year:
2021,
Volume and Issue:
99(3), P. 931 - 954
Published: May 10, 2021
Abstract
The
chubbyhead
barb,
Enteromius
anoplus
,
as
currently
described,
is
the
most
widely
distributed
freshwater
fish
in
South
Africa.
species
occurs
almost
all
major
river
systems
across
country,
with
exception
of
small
coastal
drainages
on
south
coast.
use
a
comprehensive
data
set
mitochondrial
(mtDNA)
cytochrome
b
(cyt
)
sequences
uncovered
presence
four
distinct
lineages
or
operational
taxonomic
units
(OTUs)
within
E.
:
(a)
Gouritz
lineage
endemic
to
River
system,
(b)
Olifants
Olifants‐Doring
(c)
Orange
system
and
(d)
Eastern
Cape
which
six
from
Great
Fish
Buffalo
rivers
Province
present
study
provides
new
diagnosis
for
s.s.
(the
lineage),
revalidates
cernuus
lineage)
oraniensis
species.
also
description
species,
mandelai
sp.
nov
lineage).
differ
both
by
having
complete
lateral
line
(
vs
.
an
incomplete
latter
species).
further
differs
other
three
long
maxillary
barbels
reach
exceed
vertical
through
middle
eye
lowest
number
circumpendicular
scales
(10–12
12–16
distinctive
inconspicuous
barbels.
These
findings
add
growing
body
literature
that
shows
fishes
Fold
adjacent
ecoregions
have
narrow
geographic
ranges.
This
has
ramifications
conservation
planning
management,
well
understanding
evolutionary
history
stream
these
global
hotspots.
Reviews in Aquaculture,
Journal Year:
2021,
Volume and Issue:
13(3), P. 1488 - 1530
Published: Jan. 12, 2021
Abstract
The
redclaw
crayfish
(
Cherax
quadricarinatus
;
hereafter
redclaw),
native
to
northern
Australia
and
southern
New
Guinea,
is
among
the
largest
freshwater
decapods.
It
matures
early
considered
highly
prolific
as
females
may
lay
over
one
thousand
eggs
in
a
single
clutch.
Despite
generally
preferring
slow‐moving
streams
its
range,
it
has
wide
environmental
tolerance,
making
capable
of
establishing
populations
when
introduced
range
other
conditions
habitats.
These
biological
ecological
features
render
suitable
popular
species
for
aquaculture
worldwide,
being
second
most
important
economically
(after
red
swamp
Procambarus
clarkii
).
Adding
that,
unique
coloration
fuels
demand
value
aquarium
enthusiasts,
attractive
pet
trade.
Today,
widely
translocated
(67
countries/territories)
various
established
wild
(22
countries)
have
been
reported
on
every
continent
except
Antarctica.
Information
potential
or
observed
impacts,
however,
sparse
often
anecdotal.
To
address
this
gap,
comprehensive
review
compiles
all
available
information
species,
covering
taxonomy
description,
biology
ecology,
non‐native
ranges
accompanied
with
documented
introduction
pathways.
Built
upon
these,
we
conducted
socio‐economic
classification
distribution
modelling.
We
reveal
lack
thorough
impact
assessments
despite
sufficient
indications
major
observable
impacts
at
local
scales.
call
attention
importance
managing
use
prominent
Freshwater Biology,
Journal Year:
2025,
Volume and Issue:
70(2)
Published: Feb. 1, 2025
ABSTRACT
The
ornamental
pet
trade
has
emerged
as
one
of
the
most
important
pathways
for
introduction
non‐native
aquatic
species.
In
last
two
decades,
freshwater
crayfish
have
become
a
popular
group,
with
numerous
populations
established
through
this
way,
including
some
North
American
red
swamp
Procambarus
clarkii
(Girard,
1852).
Whilst
routes
aquaculture‐derived
been
identified
molecular
methods
and
historical
documents,
obtaining
traceability
in
market
is
often
more
challenging.
We
analysed
283
pet‐traded
feral
P.
individuals,
originating
from
Europe
Southeast
Asia,
variation
fragment
mitochondrial
gene
cytochrome
c
oxidase
subunit
I
(COI)
to
determine
genetic
amongst
11
shops
various
countries,
outdoor
aquaculture
Indonesia
27
likely
releases
animals.
found
13
haplotypes,
four
which
had
not
detected
before.
Overall,
higher
haplotype
diversity
was
(Hd
=
0.555)
0.667)
compared
0.141).
observed
up
three
haplotypes
shared
between
Asian
Europe.
them
appeared
shop
open
waters
Hungary,
another
Cambodia,
stock
European
wholesalers.
third
common
provided
little
information
regarding
species'
routes.
Additionally,
present
commonly
waters.
Particularly
noteworthy
high
variability
Hungarian
collected
metropolitan
area
Budapest,
considered
hotspot
introductions.
findings
our
study
support
low
shops,
stemming
limited
number
founders
stocks.
contrast,
may
be
due
recurrent
events
different
sources.
Furthermore,
results
hypothesis
that
occurring
originate
rather
than
native
range
.
Legally
binding
regulations
on
listing
species
do
seem
curb
importation
However,
implementation
conducted
at
border
controls
(by
veterinarians)
post‐border
wholesalers
retailers)
cooperation
research
institutions
can
efficiently
serve
preventive
measures
halt
importations.
emphasise
using
analyses
both
identification
tracking
biological
invasions.
The Science of The Total Environment,
Journal Year:
2021,
Volume and Issue:
813, P. 152325 - 152325
Published: Dec. 28, 2021
Despite
voluminous
literature
identifying
the
impacts
of
invasive
species,
summaries
monetary
costs
for
some
taxonomic
groups
remain
limited.
Invasive
alien
crustaceans
often
have
profound
on
recipient
ecosystems,
but
there
may
be
great
unknowns
related
to
their
economic
costs.
Using
InvaCost
database,
we
quantify
and
analyse
reported
associated
with
globally
across
taxonomic,
spatial,
temporal
descriptors.
Specifically,
prominent
aquatic
-
crayfish,
crabs,
amphipods,
lobsters.
Between
2000
2020,
crayfish
caused
US$
120.5
million
in
costs;
vast
majority
(99%)
being
attributed
representatives
Astacidae
Cambaridae.
Crayfish-related
were
unevenly
distributed
countries,
a
strong
bias
towards
European
economies
(US$
116.4
million;
mainly
due
signal
Sweden),
followed
by
from
North
America
Asia.
The
also
largely
predicted
or
extrapolated,
thus
not
based
empirical
observations.
these
limitations,
increased
considerably
over
past
two
decades,
averaging
5.7
per
year.
crabs
150.2
since
1960
ratios
again
uneven
(57%
42%
Europe).
Damage-related
dominated
both
(80%)
(99%),
management
lacking
even
more
under-reported.
Reported
amphipods
178.8
thousand)
lobsters
44.6
lower,
suggesting
lack
effort
reporting
effects
that
are
non-monetised.
well-known
damage
crustaceans,
identify
data
limitations
prevent
full
accounting
groups,
while
highlighting
increasing
at
several
scales
available
literature.
Further
cost
reports
needed
better
assess
true
magnitude
crustaceans.
BioScience,
Journal Year:
2021,
Volume and Issue:
71(7), P. 708 - 721
Published: Feb. 4, 2021
The
world
is
witnessing
a
global
rise
in
numbers
of
emerging
invasive
alien
species,
but
identifying
which
species
pose
pandemic
threat
remains
poorly
understood
disjointed
international
regulatory
environment
presents
significant
challenge
to
biosecurity
interventions
at
scale
A
novel
way
forward
through
One
Biosecurity,
an
interdisciplinary
approach
policy
and
research
that
enhances
the
interconnections
between
human,
animal,
plant,
environmental
health
prevent
mitigate
impacts
Biosecurity
underpins
three
initiatives
essential
deal
with
risks
from
biological
invasions:
new
risk
assessment
tools
look
beyond
national
borders
toward
concern,
stronger
instrument
address
threats
worldwide
scale,
establishment
multilateral
convention
responsible
for
governance
Together,
these
will
drive
science
agenda
deliver
evidence-based
Freshwater Biology,
Journal Year:
2019,
Volume and Issue:
65(3), P. 353 - 365
Published: Dec. 2, 2019
Abstract
Invasive
alien
species
and
climate
change
are
two
of
the
most
serious
global
environmental
threats.
In
particular,
it
is
great
interest
to
understand
how
changing
climates
could
impact
distribution
invaders
that
pose
threats
ecosystems
human
activities.
this
study,
we
developed
ensemble
models
for
predicting
current
future
signal
crayfish
Pacifastacus
leniusculus
red
swamp
Procambarus
clarkii
,
highly
problematic
freshwater
worldwide.
We
collected
occurrence
records
species,
from
native
established
ranges
These
in
combination
with
averaged
observations
climatic
conditions
were
used
calibrate
a
set
10
distinct
correlative
estimating
niche
each
species.
next
projected
estimated
niches
into
geographical
space
2050s
2070s
under
representative
concentration
pathway
2.6
8.5
scenarios.
Our
had
high
predictive
abilities
suggest
annual
mean
temperature
main
driver
both
Model
predictions
indicated
have
not
fully
occupied
their
suitable
will
respond
differently
scenarios
different
geographic
regions.
Suitable
P.
was
predicted
shift
poleward
increase
extent
North
America
Europe
but
decrease
Asia.
Regions
widen
contract
This
study
highlights
invasive
thermal
preference
likely
changes.
results
provide
important
information
policy
makers
design
implement
anticipated
measures
prevention
control
these
Reviews in Fisheries Science & Aquaculture,
Journal Year:
2020,
Volume and Issue:
29(2), P. 218 - 241
Published: Aug. 13, 2020
This
review
summarizes
and
analyses
information
on
freshwater
crayfish
introductions
in
Africa.
A
total
of
136
research
papers
reports
were
found
to
be
relevant.
Forty-eight
percent
reported
presence;
21%
described
negative
impacts;
11%
referred
potential
socio-economic
benefits;
9%
evaluated
control
measures;
6%
documented
co-introduced
parasites.
Out
nine
introduced
species,
five
species
Astacus
astacus,
Cherax
quadricarinatus,
Faxonius
limosus,
Procambarus
clarkii,
virginalis
have
established
populations
the
wild.
astacus
F.
limosus
are
present
only
Morocco
P.
is
limited
Madagascar.
quadricarinatus
clarkii
six
countries,
respectively.
The
main
driver
was
provide
benefits
through
aquaculture
fisheries
development
but
there
evidence
success.
Prevailing
impacts
linked
damage
agricultural
water
infrastructure,
fishing
gear
declining
performance.
Ecological
pertain
direct
multi-trophic
consumptive
effects
as
well
indirect
competitive
primarily
upon
macro-invertebrates
spillover
parasites
other
decapods.
Research
priorities
determining
abundance,
distribution
spread
crayfishes
assessing
ecological
impact
inform
management
decisions.