Age, sex and temperature shape off-territory feeder use in black-capped chickadees
Behavioral Ecology,
Journal Year:
2024,
Volume and Issue:
35(6)
Published: Oct. 3, 2024
Abstract
Spatial
ecology
tends
to
focus
on
average
movement
patterns
within
animal
groups;
however,
recent
studies
highlight
the
value
of
considering
decisions
both
and
among
individuals.
We
used
a
marked
population
black-capped
chickadees
(Poecile
atricapillus),
assess
causes
consequences
within-
among-individual
differences
in
chickadee
space
use.
Individuals
that
feeders
addition
their
most-visited
“core
feeder”
were
defined
as
engaging
off-territory
feeder
found
females
more
likely
than
males
visit
ambient
temperatures
decrease
energetic
demands
increase.
This
may
be
due
sex-related
dominance,
where
which
are
dominant
sex
chickadees,
have
priority
access
feeders,
while
must
increase
foraging
areas
meet
higher
demand.
also
independent
temperature,
adult
less
juvenile
forage
off-territory.
suggest
this
age-specific
benefits
use
males,
un-paired
exploration
gain
information
about
potential
mates.
Finally,
we
had
propensity
survive
next
fall.
Overall,
our
results
dominance
hierarchies
individual
energetics
impact
variation
provide
suggestions
for
future
further
investigate
fitness-related
Language: Английский
Long term study on blood glucose levels in wintering great tits Parus major in sites differing in artificial food availability
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 20, 2025
Abstract
Blood
glucose
concentration
is
one
of
the
fundamental
biochemical
indices
in
physiology
birds
and
other
vertebrates.
Since
serves
as
main
fuel
for
metabolic
energy,
its
proper
level
blood
serum
crucial
to
individual
terms
physiological
health,
which
leads
applying
it
an
ecophysiological
indicator.
Such
indicator
may
be
especially
useful
during
energetically
demanding
periods,
such
winter
at
northern
latitudes.
Therefore,
objective
this
paper
was
examine
variation
wintering
great
tits
(
Parus
major)
nine
consecutive
winters
two
sites
that
differed
with
respect
amount
human-provided
food.
We
assumed
trophic
conditions
resulting
from
use
artificial
feeders
vary
between
across
years
would
affect
performance
their
condition,
should
reflected
levels
individuals.
showed
both
females
males
were
characterised
by
significantly
higher
study
site,
high
accessibility
food
sources
(forest
clearing)
than
site
low
irregular
feeding.
The
difference
remained
distinct
throughout
most
seasons
study.
also
revealed
a
substantial
case
male
tits.
In
general,
we
show
avian
can
used
environment
individuals
small
passerine
species
winter.
Language: Английский
Age, sex, and temperature shape within- and among-individual space use in black-capped chickadees
Published: July 27, 2024
Historically,
spatial
ecology
studies
have
focused
on
average
movement
patterns
within
animal
groups;
however,
recent
highlight
the
value
of
considering
decisions
both
within-
and
among-individuals.
Using
a
marked
population
black-capped
chickadees
(Poecile
atricapillus),
we
used
number
unique
feeders
an
individual
visits
our
study
area
as
proxy
for
space
use
to
assess
causes
consequences
among-individual
differences
in
chickadee
use.
We
found
that
temperature
decreased,
feeding
rate
increased.
Females,
but
not
males,
increased
coincident
with
temperature-related
increase
rates.
This
may
be
due
sex-related
dominance,
where
males
which
are
dominant
sex
chickadees,
priority
access
feeders,
while
females
their
foraging
areas
meet
higher
energetic
demand.
also
independent
temperature,
juvenile
more
than
adult
males.
suggest
this
age-specific
benefits
male,
un-paired
feeder
exploration
gain
information
about
potential
mates.
Finally,
although
showed
repeatable
throughout
study,
no
evidence
predicted
annual
survival.
Overall,
results
dominance
hierarchies
energetics
impact
variation
provide
suggestions
future
enhance
understanding
fitness-related
Language: Английский