bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: June 7, 2023
Abstract
In
environments
with
multiple
predators,
the
vulnerabilities
attached
to
spatial
positions
of
group-living
prey
are
not
uniform
and
depend
on
hunting
styles
predators.
Coursing
mainly
canids
hyenas,
follow
their
over
long
distances
attack
open
areas,
making
individuals
at
edge
group
more
dangerous
than
those
center
(marginal
predation).
contrast,
ambush
cats,
approach
undetected
appear
randomly
anywhere
in
group;
therefore,
isolated
a
greater
risk
predation.
However,
identifying
high
predation
requires
simultaneous
recording
predator
locations
direct
observation
events,
which
both
difficult.
Therefore,
several
theoretical
methods
have
been
proposed
assess
(predation
proxies).
wild
anubis
baboons
exposed
by
leopards,
lions,
we
calculated
proxies
using
movement
data
collected
from
global
positioning
system
(GPS)
collars
found
that
adult
males
were
higher
(Hypothesis
1).
addition,
within
this
2).
None
risks
differed
among
other
age-sex
classes.
The
most
dominant
male
was
expected
be
safety
3)
but
periphery,
like
males.
discussed
why
peripheral
isolated.
Methods in Ecology and Evolution,
Journal Year:
2022,
Volume and Issue:
14(8), P. 1887 - 1905
Published: Oct. 11, 2022
Abstract
GPS‐based
tracking
is
widely
used
for
studying
wild
social
animals.
Much
like
traditional
observational
methods,
using
GPS
devices
requires
making
a
number
of
decisions
about
sampling
that
can
affect
the
robustness
study's
conclusions.
For
example,
fewer
individuals
per
group
across
more
distinct
groups
may
not
be
sufficient
to
infer
group‐
or
subgroup‐level
behaviours,
while
limits
ability
draw
conclusions
populations.
Here,
we
provide
quantitative
recommendations
when
designing
studies
animal
societies.
We
focus
on
trade‐offs
between
three
fundamental
axes
effort:
(1)
coverage—the
and
allocation
among
in
one
groups;
(2)
duration—the
total
amount
time
over
which
collect
data
(3)
frequency—the
temporal
resolution
at
record
data.
first
test
tags
under
field
conditions
quantify
how
these
aspects
design
both
accuracy
(error
absolute
positional
estimates)
precision
estimate
relative
position
two
individuals),
demonstrating
error
have
profound
effects
inferring
distances
individuals.
then
use
from
whole‐group
tracked
vulturine
guineafowl
Acryllium
vulturinum
demonstrate
trade‐off
frequency
duration
impact
inferences
interactions
coverage
common
measures
behaviour
groups,
identifying
types
are
less
robust
lower
Finally,
data‐informed
simulations
extend
insights
different
sizes
cohesiveness.
Based
our
results,
able
offer
range
strategies
address
research
questions
organizational
scales
systems—from
movement
network
structure
collective
decision‐making.
Our
study
provides
practical
advice
empiricists
navigate
their
decision‐making
processes
highlights
importance
optimal
deployment
drawing
informative
Royal Society Open Science,
Journal Year:
2023,
Volume and Issue:
10(7)
Published: July 1, 2023
Individuals
show
consistent
between-individual
behavioural
variation
when
they
interact
with
conspecifics
or
heterospecifics.
Such
patterns
might
underlie
emergent
group-specific
and
between-group
differences.
However,
little
is
known
about
(i)
how
social
non-social
drivers
(external
drivers)
shape
group-level
structures
(ii)
whether
animal
groups
differences
in
structure
after
accounting
for
external
drivers.
We
used
automated
tracking
to
quantify
daily
interactions
association
networks
12
colonies
of
zebra
finches
(
Taeniopygia
guttata
).
quantified
the
effects
five
(group
size,
group
composition,
ecological
factors,
physical
environments
methodological
differences)
on
interaction
tested
expressed
day-to-day
network
controlling
these
Overall,
we
found
that
contribute
significantly
structure.
even
contribution
drivers,
there
remained
significant
support
both
(repeatability
R
:
up
0.493)
0.736)
structures.
Our
study
demonstrates
behaviour
can
be
partitioned
into
different
variation,
contributions
from
factors.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2022,
Volume and Issue:
unknown
Published: May 30, 2022
ABSTRACT
Revealing
the
consequences
of
social
structure
in
animal
societies
is
largely
determined
by
our
ability
to
accurately
estimate
functionally
relevant
patterns
contact
among
individuals.
To
date,
studies
have
predominantly
built
up
from
dyadic
connections.
However,
many
associations
or
interactions
can
involve
more
than
two
individuals
participating
together,
which
current
approaches
cannot
distinguish
independent
sets
Here
we
demonstrate
application
higher-order
networks
detect
central
roles
dominance
and
sex
structuring
groups
vulturine
guineafowl
(
Acryllium
vulturinum
).
Specifically,
find
that
while
females
low-ranking
group
members
engage
interactions,
males
dominant
are
substantially
likely
be
observed
forming
hyperlinks—edges
contain
(e.g.
a
triad).
These
results
how
provide
deeper
understanding
multidimensionality
difference
centrality
members.
Ecological Indicators,
Journal Year:
2024,
Volume and Issue:
160, P. 111877 - 111877
Published: March 1, 2024
Telemetry
using
Global
Positioning
Systems
(GPS)
and
camera
trapping
are
two
widely
used
approaches
to
detect
animal
interactions
involving
wildlife.
However,
while
the
former
follows
an
individual-based
approach,
latter
a
population-based
which
may
lead
different
outcomes
when
describing
interaction
networks.
In
this
study,
we
compared
performance
of
GPS
telemetry,
regular
grid
(CT-RG),
resource
monitoring
(in
cameras
placed
valuable
for
animals,
such
as
water
or
food;
CT-RM)
in
detecting
quantifying
interactions.
We
spatially
explicit
simulated
trajectories
150
individuals
3
imaginary
species.
9
scenarios
visiting
frequency
spatial
aggregation
environment
assess
potential
influence
behavior
landscape
structure.
The
were
sampled
three
with
six
sampling
efforts
each,
direct
indirect
between
species
quantified.
Additionally,
CT-RG
CT-RM
applied
Doñana
National
Park
evaluate
their
differences
limitations
field
application.
terms
simulation,
offered
best
interactions,
achieved
good
high
number
fixes
per
hour.
Both
also
CT-RG,
on
other
hand,
missed
most
but
correctly
identified
pairs
that
interacted
indirectly
at
some
point.
trial,
detected
almost
same
interacting
indirectly.
least
half
directly.
favors
over
CT-RM,
opposite
occurs
visits
increases.
To
summarize,
is
reliable
method
feasible
(e.g.,
small
ponds
arid
areas).
Otherwise,
show
better
performance,
although
it
miss
if
fix
rate
not
used.
Finally,
use
should
be
limited
identify
could
potentially
interact
indirectly,
quantify
these
Studying
the
mechanisms
shaping
age-related
changes
in
behaviour
("behavioural
ageing")
is
important
for
understanding
population
dynamics
our
changing
world.
Yet,
studies
that
capture
within-individual
behavioural
wild
populations
of
long-lived
animals
are
still
scarce.
Here,
we
used
a
15-year
GPS-tracking
dataset
social
obligate
scavenger,
griffon
vulture
(Gyps
fulvus),
to
investigate
movement
and
behaviours,
disentangle
role
plasticity
selection
such
patterns.
We
tracked
142
individuals
up
12
years
found
non-linear
increase
site
fidelity
with
age.
This
pattern
resulted
from
throughout
their
life
(behavioural
plasticity)
not
selective
disappearance.
Mature
vultures
increased
predictability
routines
spent
more
time
at
prime
roosting
sites
compared
younger
individuals.
Thus,
adults
likely
have
competitive
advantage
over
conspecifics.
These
were
mirrored
behaviour.
Older
interacted
less
associates
(decreasing
average
strength
age),
particularly
during
breeding
season.
Our
results
reveal
variety
ageing
patterns
species
underscore
importance
Comprehensive
longitudinal
imperative
how
shape
persistence
animal
facing
human-induced
environmental
changes.
Studying
the
spatial-social
interface
requires
tools
that
distinguish
between
social
and
spatial
drivers
of
interactions.
Testing
hypotheses
regarding
factors
determining
animal
interactions
often
involves
comparing
observed
with
reference
or
’null’
models.
One
approach
to
accounting
for
in
models
is
randomizing
movement
paths
decouple
phenotypes
while
maintaining
environmental
effects
on
movements.
Here,
we
update
a
model
detects
attraction
above
effect
constraints.
We
explore
utility
our
'wrap-around'
method
compare
its
performance
previous
using
agent-based
simulations.
The
wrap-around
provides
are
more
similar
original
tracking
data,
still
distinguishing
drivers.
Furthermore,
results
fewer
false-positives
than
predecessor,
especially
when
animals
do
not
return
one
place
each
night
but
change
foci,
either
locally
directionally.
Finally,
show
among
GPS-tracked
griffon
vultures
(Gyps
fulvus)
emerge
from
rather
constraints
their
conclude
by
highlighting
biological
situations
which
updated
might
be
most
suitable
testing
about
underlying
causes
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Nov. 23, 2022
ABSTRACT
Cooperative
breeding
is
widely
reported
across
the
animal
kingdom.
In
birds,
it
hypothesised
to
be
most
common
in
altricial
species
(where
chicks
are
dependent
on
parental
care
nest
after
hatching),
with
few
described
cases
precocial
more
independent
immediately
hatching).
However,
cooperative
may
also
difficult
detect
and
therefore
has
been
overlooked.
this
study,
we
investigate
whether
vulturine
guineafowl
(
Acryllium
vulturinum
)—which
have
young—breed
cooperatively
and,
if
so,
how
distributed
among
group
members.
Using
data
collected
from
colour-banded
individuals
one
social
of
over
three
different
seasons,
found
that
multiple
females
can
attempt
reproduce
same
season.
Broods
had
close
adult
associates,
these
associates
exhibited
four
distinct
behaviours:
babysitting,
within-group
chick
guarding,
covering
under
wings
calling
food.
Further,
offspring
significantly
male-biased,
non-mother
provided
each
brood
received,
differed
much
help
they
carers
pay
a
foraging
cost
when
providing
care.
Our
results
confirm
breeders,
which
combine
an
unusual
plural-breeding
system.
study
adds
growing
evidence
widespread
young
than
previously
thought,
thereby
counterpoint
altriciality-cooperative
hypothesis.
Foraging
is
a
key
driver
of
animal
movement
patterns,
with
specific
challenges
for
predators
which
must
search
mobile
prey.These
patterns
are
increasingly
impacted
by
global
changes,
principally
in
land
use
and
climate.Understanding
the
degree
flexibility
predator
foraging
social
strategies
pertinent
to
wildlife
conservation
under
change,
including
potential
top-down
effects
on
wider
ecosystems.Here
we
propose
future
research
directions
better
understand
predators.In
particular,
rapid
continued
advances
biologging
technology
helping
record
dynamic
behavioural
responses
animals,
ensuing
energetic
consequences,
environmental
changes.Data
collection
can
be
optimised
calibrating
interpretation
methods
captive
settings
strategic
tagging
decisions
within
between
groups.Importantly,
many
species
systems
being
found
more
flexible
than
originally
described
literature,
may
readily
detectable
through
approaches
observation.Integrating
physical
landscape
biotic
interactions
will
explaining
predicting
movements
balance
changing
world.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 25, 2024
Social
network
structure
plays
a
key
role
in
shaping
processes
animal
populations.
These
networks
often
show
distinct
patterns
humans
and
other
large
mammals,
with
relationship
strengths
organized
into
different
tiers.
Here,
we
used
continuous
fine-scale
tracking
of
four
captive
colonies
zebra
finches
(Taeniopygia
guttata),
revealing
that
consistently
have
1-2
closest
contacts,
6-7
close
22-24
strong
contacts.
The
identities
these
contacts
remain
stable
across
days,
maintained
by
spatial
affinity,
while
are
social
choice.
results
suggest
finches'
egocentric
composed
consistent,
differentiated
relationships
forming
multitiered
structure.
similarities
to
species
fundamental
principles,
such
as
limitations
time
the
ability
move
through
space,
could
drive
common
structural
properties
networks.
Social
network
structure
plays
a
key
role
in
shaping
processes
animal
populations.
These
networks
often
show
distinct
patterns
humans
and
other
large
mammals,
with
relationship
strengths
organized
into
different
tiers.
Here,
we
used
continuous,
fine-scale
tracking
of
four
captive
colonies
zebra
finches
(_Taeniopygia
guttata_),
revealing
that
consistently
have
1-2
closest
contacts,
6-7
close
22-24
strong
contacts.
The
identities
these
contacts
remain
stable
across
days,
maintained
by
spatial
affinity
while
are
social
choice.
results
suggest
egocentric
made
up
consistent,
differentiated
relationships
forming
multitiered
structure.
similarities
to
species
fundamental
principles,
such
as
limitations
time
the
ability
move
through
space,
could
drive
common
structural
properties
networks.