Effects of inbreeding and elevated rearing temperatures on strategic sperm investment
Behavioral Ecology,
Journal Year:
2024,
Volume and Issue:
35(4)
Published: June 5, 2024
Abstract
Males
often
strategically
adjust
the
number
of
available
sperm
based
on
social
context
(i.e.
priming
response),
but
it
remains
unclear
how
environmental
and
genetic
factors
shape
this
adjustment.
In
freshwater
ecosystems,
high
ambient
temperatures
lead
to
isolated
pools
hotter
water
in
which
inbreeding
occurs.
Higher
can
impair
fish
development,
potentially
disrupting
production.
We
used
guppies
(Poecilia
reticulata)
investigate
developmental
temperature
(26
°C,
30
°C)
male
status
(inbred,
outbred)
influence
their
response.
also
tested
if
was
affected
by
whether
female
a
relative
(sister)
she
inbred
or
outbred.
There
no
effect
rearing
temperature;
alone
determined
response
presence,
her
status,
relatedness.
Inbred
males
produced
significantly
more
presence
an
unrelated,
outbred
than
when
present.
Conversely,
did
not
alter
Moreover,
marginally
exposed
unrelated
that
rather
inbred,
there
difference
versus
related.
Together,
only
observed
female.
Outbred
females
our
study
were
larger
females,
suggesting
allocated
ejaculate
resources
toward
better
condition.
Language: Английский
No evidence for phenotypic condition-dependent ejaculate allocation in response to sperm competition in a seed beetle
Behavioral Ecology,
Journal Year:
2024,
Volume and Issue:
36(1)
Published: Nov. 20, 2024
Sperm
competition
is
known
to
favor
the
evolution
of
male
traits
that
confer
an
advantage
in
gaining
fertilizations
when
females
mate
multiply.
Ejaculate
production
can
be
costly
and
strategic
allocation
sperm
relation
environment
a
taxonomically
widespread
phenomenon.
However,
variation
among
males
their
ability
adjust
ejaculate
has
rarely
been
explored.
Here,
we
manipulated
phenotypic
condition
seed
beetles,
Language: Английский