Biology Letters,
Journal Year:
2010,
Volume and Issue:
6(6), P. 797 - 799
Published: May 19, 2010
Selection
imposed
through
sperm
competition
is
commonly
thought
to
promote
the
evolution
of
longer
sperm,
since
length
assumed
be
positively
associated
with
swimming
velocity.
Yet,
basis
for
this
assumption
remains
controversial,
and
there
surprisingly
little
intraspecific
evidence
demonstrating
such
a
link
between
form
function.
Here,
we
show
that
velocity
are
highly
correlated
in
sea
urchin
Heliocidaris
erythrogramma
,
but
importantly
report
failure
account
within-male
variation
these
traits
can
obscure
relationship.
These
findings,
conjunction
mounting
extremely
high
levels
intra-specific
variance
traits,
suggest
functional
morphology
may
more
prevalent
than
what
current
suggests.
Our
findings
also
selection
faster
thereby
supporting
recent
from
macroevolutionary
studies.
Physiological Reviews,
Journal Year:
2021,
Volume and Issue:
102(1), P. 7 - 60
Published: April 21, 2021
The
spermatozoon
is
a
highly
differentiated
and
polarized
cell,
with
two
main
structures:
the
head,
containing
haploid
nucleus
acrosomal
exocytotic
granule,
flagellum,
which
generates
energy
propels
cell;
both
structures
are
connected
by
neck.
sperm’s
aim
to
participate
in
fertilization,
thus
activating
development.
Despite
this
common
bauplan
function,
there
an
enormous
diversity
structure
performance
of
sperm
cells.
For
example,
mammalian
spermatozoa
may
exhibit
several
head
patterns
overall
lengths
ranging
from
∼30
350
µm.
Mechanisms
transport
female
tract,
preparation
for
recognition
interaction
oocyte
also
show
considerable
variation.
There
has
been
much
interest
understanding
origin
diversity,
evolutionary
terms
relation
mechanisms
underlying
differentiation
testis.
Here,
relationships
between
function
examined
at
levels:
first,
analyzing
selective
forces
that
drive
changes
physiology
understand
adaptive
values
variation
impact
on
male
reproductive
success
second,
examining
cellular
molecular
formation
testis
explain
how
can
give
rise
such
wide
array
forms
functions.
Cells,
Journal Year:
2022,
Volume and Issue:
11(2), P. 220 - 220
Published: Jan. 10, 2022
Mammalian
sperm
differ
widely
in
morphology,
and
several
explanations
have
been
presented
to
account
for
this
diversity.
Less
is
known
about
variation
physiology
cellular
processes
that
can
give
cells
an
advantage
when
competing
fertilize
oocytes.
Capacitation
of
spermatozoa,
a
process
essential
mammalian
fertilization,
correlates
with
changes
motility
result
characteristic
swimming
pattern
as
hyperactivation.
Previous
studies
revealed
velocity
depend
on
the
amount
ATP
available
and,
therefore,
movement
occurring
during
capacitation
hyperactivation
may
involve
bioenergetics.
Here,
we
examine
differences
levels
from
three
mouse
species
(genus
Biology Letters,
Journal Year:
2010,
Volume and Issue:
6(6), P. 797 - 799
Published: May 19, 2010
Selection
imposed
through
sperm
competition
is
commonly
thought
to
promote
the
evolution
of
longer
sperm,
since
length
assumed
be
positively
associated
with
swimming
velocity.
Yet,
basis
for
this
assumption
remains
controversial,
and
there
surprisingly
little
intraspecific
evidence
demonstrating
such
a
link
between
form
function.
Here,
we
show
that
velocity
are
highly
correlated
in
sea
urchin
Heliocidaris
erythrogramma
,
but
importantly
report
failure
account
within-male
variation
these
traits
can
obscure
relationship.
These
findings,
conjunction
mounting
extremely
high
levels
intra-specific
variance
traits,
suggest
functional
morphology
may
more
prevalent
than
what
current
suggests.
Our
findings
also
selection
faster
thereby
supporting
recent
from
macroevolutionary
studies.
