Neophobia and exploration behavior in urban gulls: the Kelp Gulls (Larus dominicanus) as a study case
Behavioural Processes,
Год журнала:
2025,
Номер
unknown, С. 105147 - 105147
Опубликована: Янв. 1, 2025
Язык: Английский
Uso de recursos de origen antrópico por parte de aves marinas que reproducen en la Patagonia argentina
El Hornero,
Год журнала:
2025,
Номер
39(2), С. 139 - 172
Опубликована: Янв. 16, 2025
Las
aves
marinas
son
uno
de
los
grupos
más
amenazados
a
nivel
global.
Sin
embargo,
varias
actividades
humanas
también
proveen
recursos
que
estas
pueden
utilizar
en
su
beneficio.
Se
presenta
una
síntesis
del
conocimiento
sobre
el
uso
antrópicos
por
parte
las
se
reproducen
litoral
patagónico
argentino.
investigaciones
realizadas
indican
un
total
quince
especies
utilizan
para
alimentación
y/o
nidificación
durante
meses
la
temporada
reproductiva.
De
diferentes
alimento
origen
antrópico
identificados,
provisto
pesca
comercial
operaciones
mar
es
utilizado
mayor
número
(doce)
y
representa
oferta
extensión
geográfica.
Un
menor
hacen
residuos
urbanos
(cuatro)
derivados
recreativa
(tres)
actividad
agrícola-ganadera
(seis).
En
relación
nidificar,
información
disponible
mayormente
anecdótica,
e
indica
seis
aprovechan
ambientes
estructuras
antrópicas
construir
sus
nidos,
siete
incorporan
materiales
mismos.
discuten
posibles
beneficios
costos
asociados
dicho
uso,
consideran
conflictos
otras
poblaciones
humanas.
espera
esta
conocimiento,
identificando
limitaciones
estudios
previos
vacíos
información,
contribuya
definición
prioridades
investigación
al
desarrollo
recomendaciones
monitoreo
interacciones
entre
reproductoras
Integrating Deep Learning into Genotoxicity Biomarker Detection for Avian Erythrocytes: A Case Study in a Hemispheric Seabird
Mathematical and Computational Applications,
Год журнала:
2024,
Номер
29(3), С. 41 - 41
Опубликована: Май 28, 2024
Recently,
nuclear
abnormalities
in
avian
erythrocytes
have
been
used
as
biomarkers
of
genotoxicity
several
species.
Anomalous
shapes
are
usually
detected
the
nuclei
by
means
microscopy
inspection.
However,
due
to
inter-
and
intra-observer
variability,
classification
these
blood
cell
could
be
problematic
for
replicating
research.
Deep
learning,
a
powerful
image
analysis
technique,
can
this
context
improve
standardization
identifying
biological
configurations
medical
veterinary
importance.
In
study,
we
present
standardized
deep
learning
model
classifying
abnormal
erythrocyte
smears
hemispheric
synanthropic
Kelp
Gull
(Larus
dominicanus).
We
trained
three
convolutional
backbones
(ResNet34
ResNet50
architectures)
obtain
models
capable
detecting
cells.
The
was
performed
at
discrimination
levels
classification,
with
broad
categories
subdivided
into
increasingly
specific
subcategories
(level
1:
“normal”,
“abnormal”,
“other”;
level
2:
“ENAs”,
“micronucleus”,
3:
“irregular”,
“displaced”,
“enucleated”,
“other”).
results
were
more
than
adequate
very
similar
1
2
(F1-score
84.6%
83.6%,
accuracy
83.9%
82.6%).
3,
performance
lower
65.9%
80.8%).
It
concluded
that
should
considered
most
appropriate
it
is
1,
quality
performance.
This
method
has
proven
fast,
efficient,
approach
reduces
dependence
on
human
supervision
erythrocytes,
adapted
contexts
reduced
effort.
Язык: Английский
White‐faced and Black‐faced ibises foraging on predictable anthropogenic food subsidies in Patagonia, Argentina
Austral Ecology,
Год журнала:
2023,
Номер
48(8), С. 2230 - 2238
Опубликована: Авг. 22, 2023
Abstract
Waste
associated
with
human
activities
can
benefit
opportunistic
species
at
the
individual
and
population
levels
but
could
also
expose
them
to
pathogens
or
toxins.
We
provide
information
on
unreported
foraging
habits
of
White‐faced
ibis
(
Plegadis
chihi
)
Black‐faced
Theristicus
melanopis
in
Chubut
River
Valley,
an
urban
agricultural
landscape
eastern
Patagonia,
Argentina.
Both
were
recorded
during
monthly
counts
made
between
February
June
2021
anthropogenic
food
sources
along
lower
river
valley,
although
almost
exclusively
those
sites
offering
waste
from
livestock
production.
This
is
first
record
both
this
type
source
origin.
ibises
present
numbers
that
varied
2
679
individuals
1
18
individuals,
respectively,
depending
site
month.
walking
over
carcasses
viscera
probing
into
these
remains
soft
soil
surrounding
ponds
where
liquids
generated
by
rendering
processes
disposed.
Given
current
growth
production
area,
further
monitoring
assessment
other
months
year
are
needed
adequately
interpret
trophic
ecology
potential
conflicts
populations.
Язык: Английский
Habitat use of urban nesting yellow-legged gulls in Croatia during the breeding season
Natura Croatica,
Год журнала:
2023,
Номер
32(2), С. 399 - 412
Опубликована: Дек. 30, 2023
Because
of
increasing
urbanization,
some
opportunistic
birds
such
as
gulls,
started
to
exploit
various
artificial
marine
and
terrestrial
food
sources.
To
better
understand
urban
gull
ecology
habitat
use,
a
study
was
done
on
yellow-legged
(Larus
michahellis)
during
the
breeding
season
in
Zadar,
coastal
city
Adriatic
Sea.
Ten
adult
gulls
(five
females
five
males)
were
caught
building
rooftops
late
incubation
period
fitted
with
GPS-GSM
solar
power
transmitters.
In
total,
2377
trip
segments
(no.
GPS
points
=
19906)
analyzed,
most
them
being
classified
nest
attendance
(56.32
%)
foraging
movements
(37.10
%).
Tracking
data
showed
that
mostly
use
areas,
agricultural
lands,
dump
site,
grasslands.
Females
more
active
while
foraging,
longer
duration
segment
length,
travelling
further
away
from
colony,
males
tended
rest
than
females.
Both
habitats
for
resting,
however
used
lands
significantly
males.
Even
though
are
generalists,
individuals
preference
certain
habitats.
After
calculating
proportional
similarity
index,
high
specialization
habitat.
Язык: Английский
Winter consumption of the introduced Green Crab Carcinus maenas by Kelp Gulls Larus dominicanus
New Zealand Journal of Marine and Freshwater Research,
Год журнала:
2024,
Номер
unknown, С. 1 - 14
Опубликована: Янв. 25, 2024
The
introduction
of
species
can
have
negative
effects
on
species,
communities,
and
ecosystems,
although
native
predators
may
profit
from
the
introduced
prey.
We
present
an
evaluation
consumption
Green
Crab
(Carcinus
maenas)
by
Kelp
Gulls
(Larus
dominicanus)
during
austral
winter
in
Patagonia,
Argentina.
remains
were
9.4%
(n
=
416)
Gull
pellets
collected
between
June
August
2021,
at
four
coastal
sectors
distributed
along
more
than
400
km
coastline.
Frequency
occurrence
Crabs
varied
0
66.7%
depending
location,
being
similar
for
three
studied
months.
Overall,
gulls
included
least
35
food
items
their
diet
with
variable
contributions
different
categories,
again
location.
This
is
first
report
provides
baseline
information
understanding
role
this
newly
invaded
ecosystems.
Язык: Английский
Estudio ornitolimnológico en el Seno de Reloncaví, Patagonia Norte, Chile
El Hornero,
Год журнала:
2024,
Номер
39(1), С. 65 - 77
Опубликована: Июнь 15, 2024
En
este
trabajo
se
emplea
una
aproximación
ornitolimnológica
para
determinar
la
estructura
de
los
ensambles
aves
en
humedales
Patagonia
norte
Chile.
Se
encontró
mayor
riqueza
especies
aquellos
perímetro
(un
“proxy”
del
espejo
agua)
y
mejor
condición
ambiental.
Las
contabilizaciones
efectuaron
bimensualmente
desde
mayo
a
noviembre
2021
el
invierno
mismo
año
determinaron
nutrientes
(e.g.,
nitrógeno,
fósforo)
parámetros
físico-químicos
oxígeno
disuelto)
dos
más
grandes.
alta
(>70),
comparación
con
otros
estudios
realizados
Chile,
especialmente
durante
conteos
efectuados
pleamar.
El
relacionó
positivamente
abundancia
individuos.
Los
situados
extremos
área
estudio,
menor
superficie
formas
irregulares,
presentaron
individuos
especies.
Lo
contrario
ocurrió
grandes,
pesar
presentar
altas
cargas
nitrogenados
fosforados.
necesita
investigación
explicar
importancia
otras
variables
nivel
paisaje.
Ontogeny of foraging behaviour in an opportunistic gull inhabiting urban marine ecosystems
Wildlife Biology,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 27, 2024
Urbanization
affects
ecosystems
by
reducing
biodiversity
and
displacing
species
from
native
habitats.
While
some
suffer,
others,
like
urban
wildlife,
adapt
through
innovative
feeding
behaviours
that
improve
their
fitness
in
human‐altered
settings.
Despite
research
on
wildlife
areas,
the
development
of
foraging
behaviour
is
still
understudied.
Here,
we
examined
age‐related
differences
yellow‐legged
gulls
Larus
michahellis
Barcelona
(Spain),
a
densely
populated
coastal
ecosystem.
Using
biologging
technologies
trophic
markers,
compared
strategies,
habitat
use,
human
interactions,
niches
juvenile,
immature,
adult
over
three
breeding
seasons.
The
results
showed
spatial
distribution
this
opportunistic
species.
Juveniles
immatures
mainly
foraged
ports
at
sea,
while
adults
favoured
These
patterns
likely
stem
reproductive
constraints
lower
efficiency
younger
birds.
Adults'
primary
use
habitats
also
explains
higher
niche.
Furthermore,
fishing
activity
significantly
influenced
gull
across
age
groups,
with
strong
associations
between
vessels.
By
studying
how
life
stage
influence
behaviour,
provides
insights
to
guide
targeted
management
strategies
for
Язык: Английский