Evolutionary modifications of <i>Astyanax</i> larval prey capture (LPC) in a dark environment
动物学研究,
Год журнала:
2023,
Номер
44(4), С. 750 - 760
Опубликована: Янв. 1, 2023
Feeding
strategies
of
an
organism
depend
on
the
multimodal
sensory
processing
that
most
efficiently
integrates
available
visual,
chemosensory,
and/or
mechanoreceptive
cues
as
part
their
environmental
adaptation.
The
blind
cavefish
morph
Astyanax
mexicanus
has
developed
sensory-dependent
behaviors
to
find
food
more
than
eyed,
surface-morph
counterparts
while
in
darkness.
In
absence
light,
adult
have
evolved
enhanced
behaviors,
such
vibration
attraction
behavior
(VAB),
and
changes
feeding
angle.
Here,
we
identified
differences
larval
prey
capture
(LPC)
behavior.
dark,
LPC
is
efficient
surface
fish.
Furthermore,
different
cave
populations
express
laterality
strike
towards
preferentially
located
left
or
right
sides.
This
suggests
occurrence,
some
extent,
divergent
evolution
among
populations.
While
can
be
triggered
exclusively
by
a
stimulus
both
cavefish,
provide
evidence
is,
at
least
partially,
process
from
VAB.
We
also
found
lack
may
exacerbate
LPC.
Thus,
proposed
mathematical
model
for
explaining
based
balance
between:
(1)
enlarged
range
foraging
field
(behavioral
perceptive)
due
asymmetry,
(2)
abundance,
(3)
disadvantages
caused
(unequal
lateral
hydrodynamic
resistance
when
swimming,
allocation
resources
brain
receptors,
predator
escape).作为环境适应的一部分，生物的摄食策略取决于最有效地整合视觉，化学感觉和/或机械感觉线索的多模式感觉处理。在黑暗的环境中，与有眼睛的表层鱼相比，墨西哥脂鲤（Astyanax
mexicanus）洞穴鱼已进化出依赖感觉的摄食行为，能更有效的找到食物。而在没有光线的情况下，成年洞穴鱼进化出强化的行为，例如波动吸引行为（VAB）和摄食角度的变化。在该研究中，我们发现了洞穴鱼幼鱼摄食行为的进化差异。在黑暗中，洞穴幼鱼的LPC比表层鱼更高效。此外，不同的洞穴种群在其捕食行为中表现出侧向性，即优先攻击位于其左侧或右侧的猎物。这表明洞穴鱼种群之间存在不同的捕食行为进化策略。虽然表层鱼和洞穴鱼的捕食行为只能由振动刺激触发，但我们提供的证据表明，幼鱼捕食行为至少部分是一种不同于成体波动吸引行为的多模式感觉处理方式。我们还发现，缺乏食物可能会加剧LPC的侧向性。因此，我们提出了一个数学模型来解释侧向性，该模型基于以下因素之间的平衡：（1）由于不对称而扩大的觅食范围（行为或感知），（2）食物丰度，以及（3）侧向性导致的不利因素（游泳时的两侧水阻力不均衡、大脑和受体的资源分配以及躲避捕食者等）。.
Язык: Английский
The spatiotemporal and genetic architecture of extraoral taste buds in Astyanax cavefish
Communications Biology,
Год журнала:
2024,
Номер
7(1)
Опубликована: Авг. 6, 2024
Intense
environmental
pressures
can
yield
both
regressive
and
constructive
traits
through
complex
evolutionary
mechanisms.
Although
regression
is
well-studied,
the
biological
bases
of
features
are
less
well
understood.
Cave-dwelling
Astyanax
fish
harbor
prolific
extraoral
taste
buds
on
their
heads,
which
absent
in
conspecific
surface-dwellers.
Here,
we
present
novel
ontogenetic
data
demonstrating
appear
gradually
late
life
history.
This
appearance
similar
but
non-identical
different
cavefish
populations,
where
patterning
has
evolved
to
permit
bud
re-specification
across
endoderm-ectoderm
germ
layer
boundary.
Quantitative
genetic
analyses
revealed
that
spatially
distinct
head
primarily
mediated
by
two
cave-dominant
loci.
While
precise
function
this
expansion
unknown,
coincides
with
a
dietary
shift
from
live-foods
bat
guano,
suggesting
an
adaptive
mechanism
detect
nutrition
food-starved
caves.
work
provides
fundamental
insight
feature,
arising
history,
promising
new
window
into
unresolved
vertebrate
sensory
organ
development.
Long-term
developmental
studies
reveal
develop
history
populations
cave-dwelling
fish,
principal
Язык: Английский
Blind cavefish evolved higher foraging responses to chemo- and mechanostimuli
PLoS ONE,
Год журнала:
2024,
Номер
19(5), С. e0300793 - e0300793
Опубликована: Май 15, 2024
In
nature,
animals
must
navigate
to
forage
according
their
sensory
inputs.
Different
species
use
different
modalities
locate
food
efficiently.
For
teleosts,
emits
visual,
mechanical,
chemical,
and/or
possibly
weak-electrical
signals,
which
can
be
detected
by
optic,
auditory/lateral
line,
and
olfactory/taste
buds
systems.
However,
how
fish
respond
inputs
when
locating
food,
as
well
the
evolution
of
these
modalities,
remain
unclear.
We
examined
Mexican
tetra,
Astyanax
mexicanus
,
is
composed
two
morphs:
a
sighted
riverine
(surface
fish)
blind
cave
morph
(cavefish).
Compared
with
surface
fish,
cavefish
have
enhanced
non-visual
systems,
including
mechanosensory
lateral
line
system,
chemical
sensors
comprising
olfactory
system
taste
buds,
auditory
help
toward
sources.
tested
mechanical
stimuli
evoke
food-seeking
behavior.
contrast
our
expectations,
both
did
not
follow
gradient
stimulus
(food
extract)
but
used
it
cue
for
ambient
existence
food.
Surface
followed
visual
cues
(red
plastic
beads
pellets),
but,
in
dark,
were
likely
rely
on
mechanosensors—the
tactile
sensor—as
did.
Our
results
indicate
similar
modality
while
affinity
levels
higher
cavefish.
addition,
evolved
an
extended
circling
strategy
forage,
may
yield
chance
capture
swimming-by
multiple
times
instead
once
through
zigzag
motion.
summary,
we
propose
that
ancestors
cavefish,
modern
behaviors,
motion,
adapt
dark.
Язык: Английский
Evolution of left–right asymmetry in the sensory system and foraging behavior during adaptation to food-sparse cave environments
BMC Biology,
Год журнала:
2022,
Номер
20(1)
Опубликована: Дек. 27, 2022
Laterality
in
relation
to
behavior
and
sensory
systems
is
found
commonly
a
variety
of
animal
taxa.
Despite
the
advantages
conferred
by
laterality
(e.g.,
startle
response
complex
motor
activities),
little
known
about
evolution
its
plasticity
ecological
demands.
In
present
study,
comparative
study
model,
Mexican
tetra
(Astyanax
mexicanus),
composed
two
morphotypes,
i.e.,
riverine
surface
fish
cave-dwelling
cavefish,
was
used
address
relationship
between
environment
laterality.
Язык: Английский
An analysis of lateralized neural crest marker expression across development in the Mexican tetra, Astyanax mexicanus
Frontiers in Cell and Developmental Biology,
Год журнала:
2023,
Номер
11
Опубликована: Фев. 15, 2023
The
biological
basis
of
lateralized
cranial
aberrations
can
be
rooted
in
early
asymmetric
patterning
developmental
tissues.
However,
precisely
how
development
impacts
natural
asymmetries
remains
incompletely
understood.
Here,
we
examined
embryonic
the
neural
crest
at
two
phases
a
animal
system
with
morphotypes:
cave-dwelling
and
surface-dwelling
fish.
Surface
fish
are
highly
symmetric
respect
to
form
adulthood,
however
adult
cavefish
harbor
diverse
asymmetries.
To
examine
if
developing
underpin
these
asymmetries,
used
an
automated
technique
quantify
area
expression
level
markers
on
left
right
sides
head.
We
marker
genes
encoding
both
structural
proteins
transcription
factors
key
stages
development:
36
hpf
(∼mid-migration
crest)
72
(∼early
differentiation
derivatives).
Interestingly,
our
results
revealed
biases
morphotypes,
consistent
lateral
were
less
common
surface
as
progressed.
Additionally,
this
work
provides
information
development,
based
whole-mount
patterns
19
genes,
between
stage-matched
cave
morphs.
Further,
study
‘asymmetric’
noise
likely
normative
component
Astyanax
Mature
morphs
may
arise
from
persistence
processes
during
or
function
occurring
later
life
history.
Язык: Английский
Cavefish dorsoventral axis angle during wall swimming: laterality asymmetry
Subterranean Biology,
Год журнала:
2024,
Номер
49, С. 19 - 29
Опубликована: Май 23, 2024
The
Astyanax
fish
exhibits
two
morphs:
an
eyed,
pigmented
surface
morph
and
eyeless,
depigmented
cave
morph.
Previous
studies
have
shown
that
blind
morphs
swim
nearly
parallel
to
the
wall
can
sense
detailed
information
about
objects
by
gliding
alongside
them
sensing
changes
in
flow
field
around
their
body
using
lateral
line
sensory
system.
Hence,
cavefish
build
hydrodynamic
images
of
surroundings.
Field
observations
showed
one
presumptive
prey,
mysid
shrimp,
is
predominately
found
not
on
floor,
but
crawling
walls.
In
our
study,
angle
axis
with
respect
a
vertical
was
measured
while
swam
tank.
Results
show
when
swimming
wall,
incline
away
from
wall.
But
most
significantly,
this
different
right
side
or
left
oriented
towards
Intriguingly,
leftward-biased
dorso-cranial
bend,
where
convex
head
side.
Other
behavioral
“handedness”.
When
exhibiting
Vibration
Attraction
Behavior
(VAB),
laterality
preponderant
they
circle
explore
vibrating
stimulus.
Likewise
larval
prey
capture
(LPC)
behavior,
larvae
strike
preferentially
located
Our
results
support
also
express
lateralization
during
passive
walls
and/or
searching
for
food
perched
walls,
such
as
shrimp.
Язык: Английский
Thalamic neurons drive distinct forms of motor asymmetry that are conserved in teleost and dependent on visual evolution
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2023,
Номер
unknown
Опубликована: Март 21, 2023
Brain
laterality
is
a
prominent
feature
in
Bilateria,
where
neural
functions
are
favored
single
brain
hemisphere.
These
hemispheric
specializations
thought
to
improve
behavioral
performance
and
commonly
observed
as
sensory
or
motor
asymmetries,
such
handedness
humans.
Despite
its
prevalence,
our
understanding
of
the
molecular
substrates
instructing
functional
lateralization
limited.
Moreover,
how
selected
for
modulated
throughout
evolution
poorly
understood.
While
comparative
approaches
offer
powerful
tool
addressing
this
question,
major
obstacle
has
been
lack
conserved
asymmetric
behavior
genetically
tractable
organisms.
Previously,
we
described
robust
asymmetry
larval
zebrafish.
Following
loss
illumination,
individuals
show
persistent
turning
bias
that
associated
with
search
pattern
underlying
thalamus.
This
permits
simple
yet
assay
can
be
used
address
fundamental
principles
across
taxa.
Here,
take
approach
diverse
teleost
species,
which
have
diverged
over
past
200
million
years.
Using
combination
transgenic
tools,
ablation,
enucleation,
teleosts
exhibit
two
distinct
forms
asymmetry,
vision-dependent
-
independent.
asymmetries
directionally
uncorrelated,
dependent
on
same
subset
thalamic
neurons.
Lastly,
leverage
Astyanax
sighted
blind
morphs,
fish
evolutionarily
derived
blindness
both
retinal-dependent
-independent
while
their
surface
conspecifics
retained
forms.
Our
data
implicate
overlapping
systems
neuronal
drive
vertebrate
likely
targets
selective
modulation
during
evolution.
Язык: Английский
Blind cavefish evolved food-searching behavior without changing sensory modality compared with sighted conspecies in the dark
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2023,
Номер
unknown
Опубликована: Июнь 13, 2023
Abstract
In
nature,
animals
must
navigate
to
forage
according
their
sensory
inputs.
Different
species
use
different
modalities
locate
food
efficiently.
For
teleosts,
emits
visual,
mechanical,
chemical,
and/or
possibly
weak-electrical
signals,
which
can
be
detected
by
optic,
auditory/lateral
line,
and
olfactory/taste
buds
systems.
However,
how
fish
respond
inputs
when
locating
food,
as
well
the
evolution
of
these
modalities,
remain
unclear.
We
examined
Mexican
tetra,
Astyanax
mexicanus
,
is
composed
two
morphs:
a
sighted
riverine
(surface
fish)
blind
cave
morph
(cavefish).
Compared
with
surface
fish,
cavefish
have
enhanced
non-visual
systems,
including
mechanosensory
lateral
line
system,
chemical
sensors
comprising
olfactory
system
taste
buds,
auditory
help
toward
sources.
tested
mechanical
stimuli
evoke
food-seeking
behavior.
contrast
our
expectations,
both
did
not
follow
gradient
stimulus
(food
extract)
but
used
it
cue
for
ambient
existence
food.
Surface
followed
visual
cues
(red
plastic
beads
pellets),
but,
in
dark,
were
likely
rely
on
mechanosensors—the
tactile
sensor—as
did.
Our
results
indicate
similar
modality
while
adherence
levels
higher
cavefish.
addition,
evolved
an
extended
circling
strategy
capture
may
yield
chance
swimming-by
multiple
times
instead
once
through
zigzag
motion.
summary,
we
propose
ancestors
needed
little
modification
adapt
dark.
Язык: Английский
Navigation in the dark: early behavioural adaptation of Europe's only native cave fish
Animal Behaviour,
Год журнала:
2024,
Номер
215, С. 111 - 124
Опубликована: Июль 29, 2024
This
study
analyses
behavioural
adaptations
in
a
recently
discovered
European
cave
fish.
Navigation
standardized
labyrinth
conditions
was
compared
between
this
fish,
its
epigean
ancestor,
the
stone
loach,
Barbatula
barbatula,
and
hybrid
specimens.
Loach
behaviour
tracked
recorded
using
an
infrared
camera.
In
open
field
tests,
both
dark
light
conditions,
loaches
showed
reduced
thigmotaxis
to
other
two
groups.
Hybrid
generally
strong
avoidance
of
field,
whereas
avoided
more
than
conditions.
Other
tests
were
performed
darkness
only.
Cave
consistent
lateralization
turning
during
exploration
Y-maze
groups,
indicating
search
strategy
optimized
for
nonvisual
navigation.
all
complex
maze
learning
evident
first
half
15
trials,
with
reduction
latency
departure
from
starting
chamber,
time
track
length
reach
food
chamber.
However,
far
successful
finding
loaches.
When
path
chamber
altered,
responded
by
changing
their
route,
tended
continue
following
previously
learned
exhibited
intermediate
behaviours.
conclusion,
enhanced
ability
navigating
labyrinths
ancestor
suggests
evolution
traits
that
optimize
survival
caves.
Язык: Английский