Singing out of tune: sexual and developmental differences in the occurrence of nonlinear phenomena in primate songs
Philosophical Transactions of the Royal Society B Biological Sciences,
Journal Year:
2025,
Volume and Issue:
380(1923)
Published: April 3, 2025
Animal
vocalizations
contain
a
varying
degree
of
nonlinear
phenomena
(NLP)
caused
by
irregular
or
chaotic
vocal
organ
dynamics.
Several
hypotheses
have
been
proposed
to
explain
NLP
presence,
from
unintentional
by-products
poor
technique
having
functional
communicative
role.
We
aimed
disentangle
the
role
sex,
age
and
physiological
constraints
in
occurrence
songs
lemur
Indri
indri
,
which
are
complex
harmonic
displays
organized
phrases.
Age
sex
affected
presence
type
songs.
In
particular,
proportion
considered
decreased
with
age,
except
for
subharmonics.
Subharmonics
potentially
mediate
perception
lower
pitch,
making
signallers
appear
larger.
frequency
jumps
occurred
lower-pitched
notes
than
regular
units,
while
chaos
sidebands
higher-pitched
units.
This
suggests
that
different
types
can
be
associated
constraints.
Finally,
indris
might
present
short-term
fatigue,
units
occurring
last
position
phrase
highest
probability
containing
NLP.
The
result
proximate
causes,
such
as
constraints,
ultimate
evolutionary
pressures,
shaped
article
is
part
theme
issue
‘Nonlinear
vertebrate
vocalizations:
mechanisms
functions’.
Language: Английский
Isochrony as ancestral condition to call and song in a primate
Annals of the New York Academy of Sciences,
Journal Year:
2024,
Volume and Issue:
1537(1), P. 41 - 50
Published: June 25, 2024
Abstract
Animal
songs
differ
from
calls
in
function
and
structure,
have
comparative
translational
value,
showing
similarities
to
human
music.
Rhythm
music
is
often
distributed
quantized
classes
of
intervals
known
as
rhythmic
categories.
These
been
found
the
a
few
nonhuman
species
but
never
their
calls.
Are
categories
song‐specific,
music,
or
can
they
transcend
song–call
boundary?
We
analyze
vocal
displays
one
mammals
producing
both
call
sequences:
Indri
indri
.
test
whether
(a)
are
conserved
across
produced
different
contexts,
(b)
exist
sequences,
(c)
between
sequences.
show
that
occur
displays.
Vocalization
type
modulate
deployment
find
isochrony
(1:1
ratio,
like
rhythm
ticking
clock)
all
song
types,
only
advertisement
three
(1:1,
1:2,
2:1
ratios).
Like
songs,
some
types
also
isochronous.
Isochrony
backbone
most
vocalizations,
unlike
speech,
where
it
rare.
In
indri,
underlies
hierarchy‐less
sequences
might
be
ancestral
both.
Language: Английский
Evolution and development of vocal communication in primates
Elsevier eBooks,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Language: Английский
Who you live with and what you duet for: a review of the function of primate duets in relation to their social organization
Journal of Comparative Physiology A,
Journal Year:
2024,
Volume and Issue:
210(2), P. 281 - 294
Published: Jan. 29, 2024
Abstract
Duets
are
one
of
the
most
fascinating
displays
in
animal
vocal
communication,
where
two
animals
fine-tune
timing
their
emissions
to
create
a
coordinated
signal.
Duetting
behavior
is
widespread
kingdom
and
present
insects,
birds,
mammals.
essential
regulate
activities
within
between
social
units.
Few
studies
assessed
functions
these
experimentally,
for
many
species,
there
still
no
consensus
on
what
duets
used
for.
Here,
we
reviewed
literature
function
non-human
primates,
investigating
possible
link
organization
species
its
duetting
behavior.
In
primates
conditions
characterized
by
higher
promiscuity
might
relate
emergence
We
considered
both
quantitative
qualitative
studies,
which
led
us
hypothesize
that
shift
from
pair
living
mixed
have
mate
defense
guarding
as
critical
Territory/resource
ownership
more
obligate
pair-living
species.
Finally,
encourage
future
experimental
research
this
topic
allow
formulation
empirically
testable
predictions.
Language: Английский