Ecotoxicology and Environmental Safety,
Journal Year:
2021,
Volume and Issue:
224, P. 112698 - 112698
Published: Aug. 25, 2021
In
vivo
testing
systems
for
environmental
androgens
are
scarce.
The
aim
of
this
study
was
to
evaluate
the
potential
male-specific
brightened
body
coloration
in
female
guppies
(Poecilia
reticulata)
serve
as
an
biomarker
using
17β-trenbolone
example.
high
bioaccumulation
skin
suggests
that
it
is
a
target
tissue
androgens.
index,
pigment
cell
ultrastructure,
levels,
sexual
attractiveness,
and
reproductive
capability
were
analyzed
following
28
days
exposure
20
ng/L,
200
2000
ng/L
17β-trenbolone.
Increases
index
caused
by
attributable
increased
pteridine
melanin
levels.
Decreases
number
offspring,
survival
rate
offspring
suggested
changes
translated
into
adverse
outcomes.
Finally,
mRNA
sequencing
indicated
levels
activating
genomic
effects
androgen
receptor
on
xanthine
dehydrogenase
exerting
non-genomic
targeting
microphthalmia-associated
transcription
factor,
tyrosinase,
tyrosinase-related
protein
1
mediated
mitogen-activated
kinase
calcium
signaling
pathways.
We
have
derived
robust
outcome
pathway
androgens,
our
findings
suggest
indicators
at
different
biological
related
can
less-invasive
or
noninvasive
biomarkers
short-term
Functional Ecology,
Journal Year:
2019,
Volume and Issue:
34(2), P. 364 - 380
Published: Nov. 9, 2019
Abstract
Aggressive
interactions
are
ubiquitous
among
animals.
They
either
directed
towards
heterospecifics,
like
predators
or
competitors,
conspecifics.
During
intraspecific
encounters,
aggression
often
serves
to
establish
hierarchies
within
the
social
group.
Thus,
in
order
understand
mechanisms
mediating
organization,
it
is
important
comprehend
escalation
and
avoidance
of
aggressive
behaviour.
Overt
costly
not
only
terms
increased
risk
injury
death,
but
also
due
opportunity
costs
energy
expenditure.
In
reduce
these
costs,
animals
expected
communicate
their
strength
motivation
prior
fights.
For
this
purpose,
they
use
different
means
communication
various
sensory
modalities,
that
visual,
acoustic,
chemical,
mechanosensory
electric
cues.
These
modalities
can
convey
similar
information,
underlining
importance
understanding
multimodal
aggression.
Thus
far,
most
studies
on
signalling
during
encounters
have
focussed
visual
acoustic
cues,
likely
as
two
predominantly
used
by
humans.
However,
depending
species’
ecology,
cues
might
play
a
minor
role
for
many
species.
Especially
aquatic
systems,
hampered
high
levels
turbidity
limited
light
conditions.
Here,
alternative
such
mechanical
electrical
prominent
role.
review,
I
provide
an
overview
organisms.
highlight
studying
general
discuss
conservation
animal
welfare
issues.
Behavioral Ecology,
Journal Year:
2018,
Volume and Issue:
unknown
Published: Sept. 8, 2018
Hormonally
active
chemical
pollution
threatens
human
and
wildlife
populations
globally.However,
despite
the
well-established
capacity
of
endocrine-disrupting
chemicals
(EDCs)
to
alter
reproductive
traits,
relatively
few
studies
have
examined
impacts
EDCs
on
mechanisms
sexual
selection.This
study
investigated
effects
short-term
exposure
an
environmentally
realistic
level
17β-trenbolone-a
potent
anabolic
steroid
used
in
livestock
production
worldwide-on
male
mate
preference,
behavior,
morphology
guppy
(Poecilia
reticulata).Male
guppies
prefer
with
larger
females
because
such
are
generally
more
fecund.Hence,
males
gain
direct
fitness
benefits
by
being
choosy.Here,
we
found
no
significant
effect
17β-trenbolone
courting
both
unexposed
exposed
often.However,
significantly
altered
amount
coercive
copulatory
behavior
("sneak"
matings)
performed.Specifically,
while
demonstrated
a
preference
for
conducting
sneaking
attempts
toward
these
females,
carried
out
greater
number
sneaks
large
than
did
males.Further,
resulted
increased
condition
index
(i.e.,
mass
relative
length).Together,
our
results
show
first
time
that
can
fish
at
concentrations
as
low
4
ng/L,
highlighting
potential
disruption
processes
this
agricultural
contaminant.
