Journal of Morphology, Journal Year: 2014, Volume and Issue: 276(4), P. 370 - 377
Published: Nov. 26, 2014
ABSTRACT Sperm performance is likely to be an important determinant of male reproductive success, especially when females copulate with multiple males. Understanding sperm therefore crucial fully understand the evolution strategies. In this study, we examined repeatability morphology and motility measures over three breeding seasons, studied relationships between function. We conducted study in wild‐derived captive house sparrows ( Passer domesticus ) Spanish P. hispaniolensis ). Results for two species were similar. As predicted from results other passerine species, total length was highly repeatable across ejaculates, components moderate. The swimming speed ejaculates lower, but statistically significant, suggesting that velocity may a relatively dynamic trait. Surprisingly, did not correlate relative midpiece, it correlated negatively flagellum length. This pattern opposite what theory predicts differs has been found before. Also contrary previous work, no evidence correlates longevity. These highlight need better understanding function birds. J. Morphol. 276:370–377, 2015. © 2014 Wiley Periodicals, Inc.
Language: Английский
Citations
29Northern House Wren (Troglodytes aedon)
Birds of the World, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 22, 2024
Language: Английский
Citations
2Sperm morphology and forward motility are indicators of reproductive success and are not age- or condition-dependent in a captive breeding population of endangered snake
PLoS ONE, Journal Year: 2023, Volume and Issue: 18(3), P. e0282845 - e0282845
Published: March 10, 2023
The
relationship
between
male
ejaculate
traits
and
reproductive
success
is
an
important
consideration
for
captive
breeding
programs.
A
recovery
plan
the
endangered
Louisiana
pinesnake
includes
release
of
young
to
wild.
Semen
was
collected
from
twenty
snakes
motility,
morphology,
membrane
viability
were
measured
each
male.
analyzed
in
relation
fertilization
rate
eggs
produced
pairings
with
a
single
female
(%
fertility)
determine
factors
contributing
success.
In
addition,
we
investigated
age-
condition-dependence
trait.
We
found
significant
variation
males
normal
sperm
morphology
(
Language: Английский
Citations
PLoS ONE,
Journal Year:
2018,
Volume and Issue:
13(3), P. e0192644 - e0192644
Published: March 6, 2018
Postcopulatory
sexual
selection
may
select
for
male
primary
characteristics
like
sperm
morphology
and
motility,
through
competition
or
cryptic
female
choice.
However,
how
such
influence
fertilization
success
remains
poorly
understood.
In
this
study,
we
investigate
possible
correlations
between
paternity
in
the
socially
monogamous
bluethroat
(Luscinia
svecica
svecica),
predicting
that
length
swimming
speed
is
positively
correlated
with
success.
total,
25%
(15/61)
of
broods
contained
extra-pair
offspring
10%
(33/315)
were
sired
by
males.
Paternity
did
not
correlate
significantly
any
aspects
motility.
Furthermore,
motility
morphological
characters
previously
have
been
shown
to
be
associated
Thus,
investigated
here
do
appear
strong
predictors
bluethroats.
Language: Английский
Citations
Journal of Evolutionary Biology,
Journal Year:
2018,
Volume and Issue:
32(3), P. 205 - 217
Published: Nov. 18, 2018
Spermatozoa
represent
the
morphologically
most
diverse
type
of
animal
cells
and
show
remarkable
variation
in
size
across
also
within
species.
To
understand
evolution
this
diversity,
it
is
important
to
reveal
what
degree
genetic
or
environmental
origin
whether
depends
on
species'
life
histories.
Here
we
applied
quantitative
methods
a
pedigreed
multigenerational
data
set
collared
flycatcher
Ficedula
albicollis,
passerine
bird
with
high
levels
extra-pair
paternity,
partition
sources
phenotypic
sperm
dimensions
for
first
time
natural
population.
Narrow-sense
heritability
(h2
)
total
length
amounted
0.44
±
0.14
SE,
whereas
corresponding
figure
evolvability
(estimated
as
coefficient
additive
variation,
CVa
was
0.02
0.003
SE.
We
found
an
increase
individual
males
between
arrival
nestling
period.
This
seasonal
may
reflect
constraints
production
fully
elongated
spermatozoa
shortly
after
at
breeding
grounds.
There
no
evidence
effect
male
age
dimensions.
In
many
previous
studies
laboratory
populations
several
insect,
mammal
avian
species,
heritabilities
morphology
were
higher,
evolvabilities
similar.
Explanations
differences
include
environment
(laboratory
vs.
wild),
intensity
sexual
selection
via
competition
(high
low)
architecture
that
involves
unusual
linkage
disequilibrium
coupled
overdominance
one
studied
Language: Английский
Citations
Cells,
Journal Year:
2021,
Volume and Issue:
10(9), P. 2369 - 2369
Published: Sept. 9, 2021
Sperm
competition
is
a
widespread
phenomenon
that
shapes
male
reproductive
success.
Ejaculates
present
many
potential
targets
for
postcopulatory
selection
(e.g.,
sperm
morphology,
count,
and
velocity),
which
are
often
highly
correlated
potentially
subject
to
complex
multivariate
selection.
Although
on
ejaculate
traits
has
been
observed
in
laboratory
experiments,
it
unclear
whether
similarly
wild
populations,
where
individuals
mate
frequently
over
longer
periods
of
time.
We
measured
univariate
velocity
population
brown
anole
lizards
(Anolis
sagrei).
conducted
mark-recapture
study
with
genetic
parentage
assignment
estimate
individual
found
significant
negative
directional
quadratic
but
we
did
not
detect
or
any
other
traits,
nor
correlational
trait
combinations.
Our
results
may
reflect
pressure
males
produce
small
ejaculates
six-month
season.
This
the
first
measure
provides
an
interesting
contrast
experimental
studies
external
fertilizers,
have
phenotypes.
Language: Английский
Citations
Journal of Evolutionary Biology,
Journal Year:
2024,
Volume and Issue:
37(7), P. 829 - 838
Published: May 13, 2024
Abstract
Sperm
competition
is
a
potent
mechanism
of
postcopulatory
sexual
selection
that
has
been
found
to
shape
reproductive
morphologies
and
behaviours
in
promiscuous
animals.
Especially
sperm
size
argued
evolve
response
through
its
effect
on
longevity,
motility,
the
ability
displace
competing
sperm,
ultimately
fertilization
success.
Additionally,
observed
co-evolve
with
female
morphology.
Theoretical
work
predicts
may
select
for
longer
but
also
favour
shorter
if
trades-off
number.
In
this
study,
we
studied
relationship
between
postmating
success
free-living
flatworm,
Macrostomum
lignano.
Specifically,
used
inbred
isolines
M.
lignano
varied
investigate
how
translated
into
worms
transfer
deposit
mating
partner.
Our
results
revealed
hump-shaped
individuals
producing
intermediate
having
highest
competitiveness.
This
finding
broadens
our
understanding
evolution
morphology
by
providing
empirical
support
stabilizing
under
competition.
Language: Английский
Citations
Canadian Journal of Zoology,
Journal Year:
2017,
Volume and Issue:
95(7), P. 505 - 514
Published: April 11, 2017
House
Wrens
(Troglodytes
aedon
Vieillot,
1809)
are
among
the
best
studied
songbirds
in
North
America,
but
most
of
what
is
known
about
this
model
species
derives
from
studies
using
artificial
nestboxes.
Consequently,
we
know
comparatively
little
natural
breeding
biology
and
whether
it
corresponds
to
patterns
reported
To
address
these
issues,
report
a
study
nest
site
selection
phenology
Western
parkmanii
Audubon,
1839)
cavities
aspen
forests
southwest
Alberta,
Canada.
A
total
96
pairs,
representing
77
different
banded
males,
were
across
4
year
period
(2011–2014).
In
total,
78%
arriving
males
paired,
with
52%
nests
successfully
fledging.
More
than
30%
attempted
polygyny,
only
8%
succeeded.
Distinct
observed
for
many
characteristics
cavity,
including
type
tree
used,
as
well
cardinal
direction
dimensions
cavity
entrance,
its
location
on
tree,
height
above
ground,
some
which
related
pairing
success.
Results
compared
nestboxes
broader
application
other
likewise
primarily
Language: Английский
Citations
Cells,
Journal Year:
2022,
Volume and Issue:
11(2), P. 231 - 231
Published: Jan. 11, 2022
Sperm
competition
is
thought
to
impose
strong
selection
on
males
produce
competitive
ejaculates
outcompete
rival
under
mating
conditions.
Our
understanding
of
how
different
sperm
traits
influence
fertilization
success,
however,
remains
limited,
especially
in
wild
populations.
Recent
literature
highlights
the
importance
incorporating
multiple
ejaculate
and
pre-copulatory
sexually
selected
analyses
aimed
at
acts
traits.
However,
variation
a
male's
ability
gain
success
may
also
depend
upon
range
social
ecological
factors
that
determine
opportunity
for
events
both
within
outside
pair-bond.
Here,
we
test
an
effect
quantity
size
male
reproductive
red-back
fairy-wren
(Malurus
melanocephalus)
while
simultaneously
accounting
sexual
potential
socio-ecological
correlates
success.
We
found
number
(i.e.,
cloacal
protuberance
volume),
but
not
morphology,
was
associated
with
red-backed
fairy-wrens.
Most
notably,
large
numbers
available
copulation
achieved
greater
within-pair
paternity
results
suggest
use
as
defensive
strategy
guard
system
where
there
high
risk
female
control
copulation.
Finally,
our
work
opportunities
when
examining
role
determining
Language: Английский
Citations
Journal of Ornithology,
Journal Year:
2019,
Volume and Issue:
160(4), P. 1053 - 1063
Published: May 22, 2019
Language: Английский
Citations
Sperm morphology, sperm motility and paternity success in the bluethroat (Luscinia svecica)
Moderate heritability and low evolvability of sperm morphology in a species with high risk of sperm competition, the collared flycatcher Ficedula albicollis
Selection on Sperm Count, but Not on Sperm Morphology or Velocity, in a Wild Population of Anolis Lizards
Sperm competition favours intermediate sperm size in a hermaphrodite
Nest site selection and breeding biology of Western House Wrens (Troglodytes aedon parkmanii) using natural cavities in Western Canada
Sperm Numbers as a Paternity Guard in a Wild Bird
Measuring sperm swimming performance in birds: effects of dilution, suspension medium, mechanical agitation, and sperm number