Urbanization’s Hidden Influence: Linking Landscape Alterations and Feather Coloration with Pigeon’s Cholesterol levels
Environmental Research,
Год журнала:
2025,
Номер
271, С. 121115 - 121115
Опубликована: Фев. 13, 2025
Язык: Английский
The Interplay Between Urban Temperature and Feather Coloration: Factors Shaping Immunological Traits in Pigeons (Columba livia)
Daniela Galdames,
Javiera Arcila,
Diego Landaeta
и другие.
Integrative Zoology,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 26, 2025
The
development
of
anthropogenic
structures
in
cities
has
resulted
thermal
heterogeneity,
potentially
affecting
the
immunological
features
urban
fauna.
In
these
environments,
synanthropic
species
such
as
pigeons
(Columba
livia)
exhibit
coloration
polymorphisms
under
endocrine
regulation
mediated
by
melanocortin
system,
which
determines
several
traits.
Due
to
potential
sources
variability,
we
assessed
how
habitat
influences
physiological
traits
related
features,
theoretically
affected
feather
coloration,
while
considering
other
factors
seasonality,
body
mass,
and
sex.
This
study
aimed
determine
whether
from
locations
with
different
temperatures
(Santiago,
Chile)
color
polymorphism
exhibited
variability
plasma
immunoglobulin
Y
concentration,
leukocyte
profiles,
H/L
index.
results
demonstrate
that
variations
characteristics
their
habitats.
Specifically,
observed
a
strong
effect
heterogeneity
on
ratio,
higher
values
areas
experiencing
warmer
temperatures,
relationship
dependent
mass.
We
also
identified
differential
impacts
seasonality
sex
basophil
monocyte
percentages.
Regarding
humoral
immunity,
found
environmental
temperature
plumage
melanism
was
influenced
Our
findings
contribute
understanding
immune
system
birds
provide
valuable
insights
into
response
landscape
modifications.
Язык: Английский
Constitutive innate immune defenses in relation to urbanization and population density in an urban bird, the feral pigeon Columba livia domestica
Integrative Zoology,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 18, 2024
Abstract
Urbanization
processes
modulate
the
immunological
challenges
faced
by
animals.
Urban
habitat
transformations
reshape
pathogen
diversity
and
abundance,
while
high
population
density—common
in
urban
exploiter
species—promotes
disease
transmission.
Responses
to
urbanization
may
include
adaptive
adjustments
of
constitutive
innate
immune
defenses
(e.g.
complement
system
natural
antibodies
[NAbs]),
which
serve
as
first‐line
protection
against
infections.
Here,
we
investigated
associations
host
density
with
NAbs
an
bird,
feral
pigeon
Columba
livia
domestica
.
To
do
so,
employed
hemolysis–hemagglutination
assay
analyze
nearly
200
plasma
samples
collected
across
gradients
five
major
cities
Poland.
We
found
a
negative
association
between
score
hemagglutination
(i.e.
activity),
but
not
hemolysis
indicating
either
immunosuppression
or
downregulation
this
defense
highly
transformed
landscape.
Population
was
significantly
related
parameter,
providing
no
evidence
for
density‐dependent
modulation
defenses.
At
same
time,
there
condition
(scaled
mass
index),
suggesting
resource
allocation
trade‐offs
contrasting
effects
environment
on
body
condition.
The
results
demonstrate
that
structure
can
be
important
factor
shaping
pigeon,
although
these
were
mediated
variation
density.
Our
study
highlights
complexity
links
wildlife
reinforces
need
comprehensive
ecoimmunological
studies
Язык: Английский