Sex‐specific selection of agricultural farmland by a partially migratory ungulate
Journal of Animal Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 27, 2025
Abstract
Large
herbivores
at
northern
latitudes
often
forage
on
agricultural
farmland.
In
these
populations,
the
presence
of
both
resident
and
migrant
individuals
(termed
partial
migration)
is
common,
but
how
migrants
residents
differ
in
their
selection
farmland
not
well‐understood.
Higher
access
to
may
provide
benefits
compensating
for
following
‘green
wave’
emerging
vegetation
such
as
migrants.
According
sexual
segregation
theory,
males
females
body‐size‐related
nutritional
needs
risk
sensitivity
associated
with
Yet,
sexes
through
an
annual
cycle
remains
unclear.
We
quantified
seasonal
variation
by
partially
migratory
red
deer
(
Cervus
elaphus
)
broad,
landscape
scale
fine,
within‐home
range
using
16
years
data
(2005–2020)
from
329
115
Norway.
tested
predictions
related
migration
theories
resource
functions.
predicted
higher
than
migrants,
due
needs,
that
perceived
predation
would
impact
diurnal
patterns.
The
time
spent
was
winter
(14%–18%)
summer
(8%–14%).
Residents
selected
more
mainly
scale,
while
differences
were
smaller
less
consistent
a
scale.
Females
showed
broad‐scale
winter,
whereas
summer.
At
during
darkness,
sex
small
otherwise.
fine‐scale
markedly
low‐light
conditions
daylight.
A
high
population
density
index
correlated
farmland,
i.e.
availability
home
ranges,
effect
weak
Our
study
emphasises
hypotheses
deriving
can
improve
our
understanding
ungulates'
highlights
importance
retaining
connectivity,
allowing
reducing
pressure
local
resources.
Language: Английский
An experimental assessment of biomass loss due to red deer (Cervus elaphus L.) grazing on agricultural grass meadows in Norway
European Journal of Wildlife Research,
Journal Year:
2024,
Volume and Issue:
71(1)
Published: Dec. 4, 2024
Abstract
In
Europe,
over
a
third
of
the
agricultural
area
is
grass
meadows
used
for
livestock
grazing
and
fodder
production.
Grass
provide
food
source
wild
ungulates
causing
human-wildlife
conflicts
due
to
forage
removal.
Few
experimental
studies
have
quantified
biomass
loss
with
enough
replicates
determine
how
surrounding
environments
influences
level
Using
an
exclosure
experiment
on
57
grassland
five
years
at
northwest
coast
Norway
covering
10
650
km
2
,
we
removal
by
red
deer
(Cervus
elaphus
L.)
environmental
factors
impacted
(Study
1).
Furthermore,
examined
development
crude
protein
concentration
in
fields
throughout
growing
season
2).
The
average
predicted
was
16%
first
harvest,
7.3%
second
harvest
Biomass
increased
density
from
0%
lowest
(0.6
harvested/km
)
31%
highest
(4
).
12%
32.8%
as
terrain
ruggedness
index
(TRI)
rose
2.1
7.1.
Absolute
towards
time
Crude
higher
unfenced
plots
during
period
before
but
not
between
quantification
large
spatial
scale
several
this
study
provides
better
understanding
variation
losses.
Language: Английский