Conservation Physiology,
Journal Year:
2022,
Volume and Issue:
10(1)
Published: Jan. 1, 2022
Migrating
birds
face
a
myriad
of
hazards,
including
higher
exposure
to
parasites
and
numerous
competing
energy
demands.
It
follows
that
migration
may
act
as
selective
filter
limit
population
growth.
Understanding
how
individual-level
physiological
condition
disease
status
scale
up
dynamics
through
differential
survival
individuals
is
necessary
identify
threats
management
interventions
for
migratory
populations,
many
which
increasing
conservation
challenges.
However,
linking
individual
condition,
parasite
infection
can
be
difficult.
We
examined
the
relationship
among
two
measures
[scaled-mass
index
heterophil/leukocyte
(H/L)
ratio],
hematozoa
(i.e.
hemoparasites)
presence
abundance,
constitutive
immunity
in
353
autumn
migrating
red-tailed
hawks
(Buteo
jamaicensis
calurus)
from
2004
2018.
Hematazoa
Haemoproteus
Leucocytozoon)
were
blood
smears
139
(39.4%).
H/L
ratio
decreased
with
scaled-mass
index.
Adults
had
significantly
than
juveniles.
Our
immune
defences,
hemolytic-complement
activity
bacteria-killing
ability,
highly
positively
correlated.
most
notable
finding
was
negative
between
parasitemia
documented
mortality),
indicating
haemosporidian
influence
during
challenging
life
stage.
The
effect
on
often
debated,
we
provide
evidence
affect
survival.
In
contrast,
did
not
find
trade-offs
defences.
The Wilson Journal of Ornithology,
Journal Year:
2023,
Volume and Issue:
135(2)
Published: Sept. 19, 2023
Até
recentemente,
os
ambientes
urbanos
eram
considerados
pouco
atraentes
para
pesquisas
ecológicas
devido
à
perda
das
condições
ambientais
originais
(por
exemplo,
menor
riqueza
de
espécies
e
presença
exóticas),
atividade
pedestres
muitos
outros
fatores
associados
própria
cidade.
Apesar
do
crescente
interesse
recente
por
que
habitam
áreas
urbanas,
relativamente
poucos
estudos
relatam
a
captura
animais
nesses
ambientes.
Neste
artigo,
nosso
objetivo
é
promover
em
compartilhando
lições
aprendidas
adaptações
metodológicas
desenvolvidas
durante
um
estudo
aves
envolveu
o
uso
extensivo
redes
neblina
com
diferentes
graus
urbanização
uma
grande
Relatamos
como
algumas
ao
método
amostragem
rede
adoção
alguns
protocolos
simples
nos
permitiram:
(1)
amostrar
vários
locais
da
cidade,
cenários,
(2)
interagir
positivamente
comunidade
local,
gerando
engajamento
público.
Bioacoustics,
Journal Year:
2024,
Volume and Issue:
33(2), P. 203 - 220
Published: March 3, 2024
Passive
acoustic
monitoring
(PAM)
is
a
sampling
technique
that
has
gained
increasing
popularity
in
the
field
of
wildlife
and
research
since
it
allows
for
non-invasive
cost-effective
collection
information.
Retrieving
biological
information
from
PAM
recordings
can
often
involve
time-consuming
sound
annotation
methodologies,
but
advent
indices
help
expedite
this
process.
While
correlations
between
species
richness
have
been
observed
variety
ecological
contexts,
these
relationships
faulter
environments
with
increased
vehicular
noise.
Here,
we
assessed
direct
impact
noise
on
nine
through
controlled
manipulation
within
computer-generated
bird
assemblage
soundscapes.
Our
results
demonstrate
recording
distance
roadsides
number
passing
cars
per
minute
notable
persistent
impacts
index
values,
magnitude
effect
varies
across
indices.
Four
demonstrated
greater
resilience
to
interference
may
therefore
be
better
suited
developed
areas:
Bioacoustic
Index,
Acoustic
Complexity
Diversity
Evenness
Index.
By
contributing
collective
understanding
behaviours
under
anthropogenic
pollution,
hope
inform
their
application
human-developed
contexts.
Animal Conservation,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 29, 2024
Abstract
Habitat
loss,
fragmentation,
and
degradation
of
habitats
are
among
the
most
pervasive
impacts
on
species
persistence.
Mammals
may
vary
in
their
response
to
these
impacts,
both
abundance
physiological
parameters.
Herein,
we
verified
how
habitat
quality
influenced
small
mammal
nutritional
status
stress
levels
five
semi‐deciduous
forest
remnants
Brazilian
Cerrado.
To
assess
species'
responses,
used
body
condition
as
an
indicator
neutrophil/lymphocyte
(N/L)
ratio
chronic
Gracilinanus
agilis
Rhipidomys
macrurus
.
We
sampled
264
animals
belonging
following
species:
G.
,
Didelphis
albiventris
Akodon
montensis
Oligoryzomys
spp.,
Rattus
rattus
R.
Oecomys
cleberi
Hylaeamys
megacephalus
three
unidentified
rodent
species.
found
no
negative
effect
reduced
however,
N/L
ratios
were
lower
only
high‐quality
habitats,
demonstrating
that
this
parameter
is
accurate
stress.
Based
preliminary
analysis,
also
reported
impoverished
fauna,
mainly
dominated
by
generalist
species,
low‐quality
habitats.
Thus,
conclude
short‐term
reduction
leads
increased
levels,
which
can
turn
lead
future
population
declines
culminate
biotic
homogenization.
Bioscience Journal,
Journal Year:
2023,
Volume and Issue:
39, P. e39071 - e39071
Published: April 14, 2023
Haemosporidian
parasites
can
cause
pathogenic
infections,
leading
to
death
or
a
reduction
in
the
physical
and
reproductive
abilities
of
host.
Several
studies
have
identified
haemosporidian
infections
neotropical
bird
communities,
but
few
been
conducted
populations,
relating
infection
biological
attributes
species.
To
determine
prevalence
population
Antilophia
galeata
assess
factors
that
may
be
associated
with
parasitaemia,
we
analysed
blood
smears
62
individuals
from
Cerrado
forest
fragment.
For
each
individual,
body
mass,
length
tarsus,
sex,
presence/absence
brood
patch
feather
moult
were
recorded.
In
total,
33
(53.2%)
infected
parasites,
32
(51.6%)
Plasmodium
spp.
one
(1.61%)
was
Haemoproteus
sp.
Parasitaemia
not
related
seasons,
reproduction,
moulting
condition
correlated
positively
total
leucocyte
count,
suggesting
effective
control.
This
tolerant
because,
despite
high
prevalence,
parasitaemia
low
constant;
this
is
potentially
chronic
showed
no
adverse
effects
on
parameters
population.
Avian Conservation and Ecology,
Journal Year:
2022,
Volume and Issue:
17(2)
Published: Jan. 1, 2022
The
biological
effects
of
lead
(Pb)
contamination
have
been
reported
in
various
species.
There
are
no
restrictions
on
the
use
Pb
products,
including
bullets,
areas
south
Hokkaido,
Japan.
Local
governments
announced
presence
soil
sediments
water
bodies.
Previous
studies
confirmed
relationship
between
blood
level
(BLL)
and
immune
cells.
This
study
was
performed
with
aim
clarifying
effect
In
total,
170
Black-headed
Gulls
(Chroicocephalus
ridibundus)
were
captured,
a
population
Tokyo
Bay
November
2018
April
2021
Mikawa
January
2019
2021.
Linear
regression
analysis
white
cell
count
(WBC),
proportion
heterophils
(Het),
lymphocytes
(Lym),
ratio
(H/L
ratio),
copy
number
CD4
messenger
RNA,
CD8α
RNA
as
objective
variables,
BLL
explanatory
variable.
group
<
1.0
µg/dL
had
significantly
lower
Het
higher
Lym
than
that
>
3.5
(P
0.05).
addition,
H/L
µg/dL.
WBC
ranging
from
to
suggests
pollution
cells
is
some
previous
criteria
values.
It
possible
gulls
affected
by
suffer
indirect
negative
function,
possibly
making
them
more
susceptible
infectious
diseases.
major
environmental
pollutant,
against
which
measures
must
be
taken.
Birds
are
excellent
bioindicators
of
disturbance
in
the
environment.
Rapid
urbanization
has
led
to
birds
living
anthropogenic
environments,
including
Sewage
Treatment
Plants
(STPs).
However,
few
studies
have
explored
pollutants'
impacts
from
STPs
on
wild
birds.
This
study,
conducted
central
Brazil,
used
non-destructive
biomarkers
compare
free-living
an
urban
STP
and
a
protected
area,
Silvânia
National
Forest
(FLONA).
were
sampled
mist
nets
dry
rainy
season
months
at
both
sites.
Blood
samples
collected
for
comet
assay,
micronucleus
test,
leukocyte
profile.
Feathers
analyze
metal
concentrations,
water
local
sources
tested
physicochemical
parameters
content.
Overall,
had
higher
frequencies
genotoxic
damage
erythrocyte
abnormalities,
increased
immunological
responses
inflammation
compared
FLONA
Both
sites
traces
potentially
toxic
metals
bird
feathers.
study
is
first
assess
genotoxic,
immunological,
metal-related
It
highlights
potential
harm
pose
populations.
further
research
needed
establish
links
between
observed
its
impact
behavior
reproductive
patterns.
