Habitat structural complexity predicts cognitive performance and behaviour in western mosquitofish
Biology Letters,
Год журнала:
2024,
Номер
20(7)
Опубликована: Июль 1, 2024
Urban
stream
syndrome
alters
habitat
complexity.
We
define
complexity
as
the
degree
of
variation
in
physical
structure,
with
increasing
equating
to
higher
Habitat
affects
species
composition
and
shapes
animal
ecology,
physiology,
behaviour
cognition.
used
a
delayed
detour
test
measure
whether
cognitive
processes
(motor
self-regulation)
(risk-taking)
female
Western
mosquitofish,
Gambusia
affinis,
varied
structural
(low,
moderate
high)
that
was
quantified
visually
for
nine
populations.
predicted
motor
self-regulation
risk-taking
would
increase
complexity,
yet
we
found
support
opposite.
Lower
habitats
offer
less
refuge
potentially
leading
predation
pressure
selecting
greater
by
fish
self-regulation.
Our
findings
provide
insight
into
how
can
shape
offers
broader
understanding
why
some
may
tolerate
conditions
urbanized
environments.
Язык: Английский
Habitat structural complexity predicts cognitive performance and behavior in western mosquitofish
Опубликована: Июнь 29, 2024
Urban
stream
syndrome
alters
habitat
complexity.
We
define
complexity
as
the
degree
of
variation
in
physical
structure,
with
increasing
equating
to
higher
Habitat
affects
species
composition
and
shapes
animal
ecology,
physiology,
behavior,
cognition.
used
a
delayed
detour
test
measure
whether
cognitive
processes
(motor
self-regulation)
behavior
(risk-taking)
female
Western
mosquitofish,
Gambusia
affinis,
varied
structural
(low,
moderate,
high)
that
was
quantified
visually
for
nine
populations.
predicted
motor
self-regulation
risk-taking
would
increase
complexity,
yet
we
found
support
opposite.
Lower
habitats
offer
less
refuge
potentially
leading
predation
pressure
selecting
greater
by
fish
self-regulation.
Our
findings
provide
insight
into
how
can
shape
offers
broader
understanding
why
some
may
tolerate
conditions
urbanized
environments.
Язык: Английский
Cognitive and behavioral response of mosquitofish (Gambusia affinis) to environmental factors: Microplastics, predator cues, and detour design methods
Journal of Fish Biology,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 13, 2024
Abstract
Urban
stream
syndrome
is
the
collective
term
used
to
describe
physical
and
ecological
degradation
of
streams
draining
urban
lands
that
poses
substantial
threats
freshwater
ecosystems.
Among
various
consequences
expansion,
microplastic
pollution
shifts
in
predator–prey
dynamics
are
prominent
alterations
natural
habitat
could
impact
cognitive
behavioral
responses
aquatic
species.
To
explore
how
symptoms
fish,
we
conducted
two
experiments
using
a
delayed
detour
test
measure
risk‐taking
inhibitory
control
Gambusia
affinis
.
In
first
experiment,
hypothesized
G.
exposed
different
concentrations
microplastics
would
show
altered
risk‐taking.
second
exposure
predator
chemical
cues
during
task
alter
We
did
not
find
significant
differences
or
cues.
then
compared
effect
size
confidence
intervals
(CI)
these
results
with
published
same
study
response
environmental
conditions.
Our
investigations
revealed
CIs
studies
presented
here
were
larger
than
previously
studies.
consider
potential
changes
experimental
design
might
have
affected
our
ability
detect
differences,
such
as
dimensions
testing
tanks.
also
suggest
extending
duration
allow
ample
time
for
both
exiting
starting
chamber
solving
detour.
propose
considering
age
species
under
adjusting
paradigm
design.
Although
findings
specific
,
underscore
importance
aspects
ecologically
relevant
when
analysing
fish.
With
discussion,
contribute
understanding
methodologies
highlight
factors
influence
outcomes.
Язык: Английский
Multiple within species comparisons show Tanganyikan cichlid fish have larger brains in less structurally complex habitats
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 8, 2024
Abstract
Many
studies
have
found
a
link
between
higher
habitat
structural
complexity
and
increased
relative
brain
size
in
vertebrates.
Here
we
explore
this
relationship
multi-species
comparison,
comparing
ten
species
of
wild
cichlids
that
differ
their
social
territorial
behaviour,
but
which
occur
across
four
ecologically
similar
structurally
diverse
rocky
habitats.
This
design
allows
us
to
perform
repeated
intra-specific
comparisons,
avoiding
confounds
associated
with
comparisons
boundaries.
We
sampled
147
fish,
analysing
architecture
while
controlling
for
body
mass
species-specific
variability
compared
complexity,
quantified
using
underwater
video
three-dimensional
reconstructions.
Our
results
challenge
the
Clever
Foraging
Hypothesis
(CFH),
posits
greater
correlates
larger
sizes.
Contrary
CFH,
fish
from
least
complex
had
significantly
brains.
Additionally,
analysis
indicated
significant
enlargement
cerebellum
less
habitats,
whereas
hypothalamus
showed
non-significant
negative
trend.
Taken
together,
these
indicate
lower
may
impose
cognitive
demands
on
spatial
memory
navigation
due
limited
refuges
predation
risk.
study
highlights
need
reconsider
assumed
linear
positive
environmental
development,
suggesting
simpler
environments
might
also
ecological
challenges
drive
evolution.
findings
underscore
importance
considering
intra-species
specific
different
habitats
Язык: Английский