Journal of Applied Ichthyology,
Journal Year:
2021,
Volume and Issue:
38(1), P. 114 - 117
Published: Oct. 27, 2021
The
Ponto-Caspian
round
goby
Neogobius
melanostomus
is
a
fish
well
known
for
its
invasion
success
in
North
America
and
Europe.
Though
it
originates
from
eastern
Europe,
only
native
to
few
rivers
this
region.
Since
the
species
physiologically
tolerant
of
varying
environmental
conditions,
rapid
spread
establishment
adjacent
water
basins
likely.
Establishment
also
associated
with
ecological
consequences.
It
therefore
important
track
close
region,
which
often
overshadowed
by
reports
further
away.
Here
we
report
first
evidence
alien
Aegean
watershed
N.
following
regional
monitoring
program
fauna.
Size-
sex–related
characteristics
population
are
discussed
relation
level
establishment.
Biological Invasions,
Journal Year:
2024,
Volume and Issue:
26(12), P. 4301 - 4315
Published: Sept. 23, 2024
Abstract
Salinity
can
shape
species’
distributions
via
physiological
costs.
Understanding
how
and
when
these
costs
occur
help
predict
colonisation
patterns,
for
example
during
species
invasions.
To
understand
the
impacts
of
high
salinity
environments
on
ongoing
expansion
invasive
round
goby
(
Neogobius
melanostomus
)
towards
North
Sea,
fish
from
this
invasion
front
were
spawned
in
a
common-garden
setup
at
different
salinities.
Reproductive
adults
acclimated
to
control
(20
PSU)
representing
current
conditions,
Sea
coastal
(30
PSU).
In
salinities
they
sorted
into
spawning
groups,
attempts
egg
development
was
tracked
1.5
months.
The
results
showed
strong
impact
30
PSU
treatment,
with
complete
developmental
failure
all
clutches
salinity.
failed
resulted
significant
increase
consumption
by
nest-guarding
males.
addition,
sperm
velocity
decrease
increasing
tested
both
an
intermediate
level.
Few
differences
adult
physiology
found
as
consequence
treatments.
These
show
that,
despite
acclimation
gametes
N.
cannot
now
cope
which
their
spread
is
currently
predicted.
Though
adaptation
or
transgenerational
might
allow
reproduction
higher
than
occupy,
we
suggest
models
incorporate
reproductive
limit
PSU.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
959, P. 178123 - 178123
Published: Dec. 29, 2024
Health
and
nutrition
of
individuals
are
tied
to
reproductive
success,
which
determines
population
viability.
Environmental
variability
anthropogenic
effects
can
affect
the
health
a
species
leading
repercussions
hinder
recovery
endangered
populations.
Indices
were
examined
for
an
imperiled
species,
delta
smelt,
Hypomesus
transpacificus,
in
relation
their
status
evaluate
hydrologic
conditions
San
Francisco
Estuary
Sacramento-San
Joaquin
Delta.
Adult
smelt
collected
by
Fall
Midwater
Trawl
Spring
Kodiak
during
monthly
monitoring
surveys
run
California
Department
Fish
Wildlife
from
2011
2018
spanning
head
Carquinez
strait
Sacramento
Deep
Water
Ship
Channel.
The
this
period
ranged
high
precipitation
(2011
2017)
drought
(2012-2016).
Drought,
via
indirect
contaminant
concentrations
food
availability,
is
hypothesized
influence
success
smelt.
Each
individual
was
size
(length,
weight,
condition
factor),
(gill
liver
pathology/indices),
nutritional
(RNA/DNA
glycogen
depletion
estimated
histologically),
indicators
(gonadosomatic
indices
[GSI],
oocyte
developmental
stage,
clutch
size,
weight).
Fork
length
factor
both
had
strong,
positive
correlations
with
reproduction.
Glycogen
correlated
higher
mass,
area
GSI,
indicating
females
low
metrics.
Gill
lesion
severity,
often
increases
exposure,
negatively
associated
GSI.
Delta
Suisun
Marsh
Cache
Slough
longest
fork
highest
measures.
metrics
proportion
post-spawned
late-stage
oocytes.
Drought
did
not
appear
reproduction
but
reduced
size.
Journal of Applied Ichthyology,
Journal Year:
2021,
Volume and Issue:
38(1), P. 114 - 117
Published: Oct. 27, 2021
The
Ponto-Caspian
round
goby
Neogobius
melanostomus
is
a
fish
well
known
for
its
invasion
success
in
North
America
and
Europe.
Though
it
originates
from
eastern
Europe,
only
native
to
few
rivers
this
region.
Since
the
species
physiologically
tolerant
of
varying
environmental
conditions,
rapid
spread
establishment
adjacent
water
basins
likely.
Establishment
also
associated
with
ecological
consequences.
It
therefore
important
track
close
region,
which
often
overshadowed
by
reports
further
away.
Here
we
report
first
evidence
alien
Aegean
watershed
N.
following
regional
monitoring
program
fauna.
Size-
sex–related
characteristics
population
are
discussed
relation
level
establishment.
