Animal Biology,
Journal Year:
2020,
Volume and Issue:
70(3), P. 239 - 250
Published: March 19, 2020
Abstract
Organisms
living
in
extreme
environments,
such
as
amphibians
inhabiting
the
Tibetan
plateau,
are
faced
with
a
magnitude
of
potentially
strong
selection
pressures.
With
an
average
elevation
exceeding
4500
m,
plateau
is
mainly
characterized
by
low
temperatures,
but
little
known
about
influence
this
factor
on
growth,
development,
and
behaviour
amphibian
larvae
environment.
Using
common
garden
experiment,
we
studied
temperatures
early
growth
development
tadpoles
brown
frog
(
Rana
kukunoris
)
endemic
to
eastern
plateau.
We
discovered
that
temperature
had
significant
tadpoles,
those
undergoing
high-temperature
treatment
growing
developing
faster
than
their
siblings
from
low-temperature
treatment.
However,
high-altitude
individuals
grew
low-altitude
at
while
opposite
was
true
high
temperatures.
These
results
support
adaptation
hypothesis,
tadpoles’
developmental
rates
were
maximized
experienced
native
environments.
suggest
variation
ambient
temperature,
combined
evolutionary
local
probably
one
most
critical
environmental
factors
shaping
altitudinal
differences
Animal Biology,
Journal Year:
2019,
Volume and Issue:
69(3), P. 365 - 376
Published: Jan. 1, 2019
Abstract
Phenotypic
flexibility
of
morphological
and
physiological
traits
within
species
is
a
common
phenomenon
across
animal
taxa.
Hesse’s
rule
predicts
that
the
size
an
organ
should
exhibit
increase
with
increasing
altitude
along
environmental
gradients
due
to
changes
in
oxygen
supply
energy
demands.
Here,
we
test
prediction
by
investigating
geographical
variation
relative
organs
(i.e.,
heart,
lungs,
liver,
kidneys)
ten
populations
Bufo
andrewsi
gradient.
We
found
these
four
specific
did
not
or
latitude
all
populations.
also
find
increased
among
six
located
at
similar
longitude,
which
inconsistent
rule.
Our
findings
suggest
demands
do
necessarily
affect
Animal Biology,
Journal Year:
2017,
Volume and Issue:
67(3-4), P. 227 - 237
Published: Jan. 1, 2017
In
animals,
the
amount
of
nutrients
acquired
through
foraging
and
proportion
metabolisable
energy
gained
is
reflected
in
digestive
tract
length.
This
digestion
theory
predicts
that
consumption
food
with
high
content
indigestible
material
will
lead
to
increased
gut
dimensions.
Here,
we
analyzed
geographic
variation
length
related
diet
among
14
Fejervarya
limnocharis
populations
test
theory.
Relative
significantly
differed
between
males
females
populations.
The
relative
altitude.
We
also
found
a
positive
correlation
plant
for
both
sexes,
which
consistent
prediction
Our
findings
suggest
temperature
associated
altitude
affects
composition,
and,
thereby
ultimately
morphology
individuals.
Frontiers in Ecology and Evolution,
Journal Year:
2022,
Volume and Issue:
10
Published: Aug. 4, 2022
Phenotypic
variation
of
morphological
and
physiological
traits
is
assumed
to
be
generated
from
spatial
heterogeneity
in
environments,
it
has
been
regarded
as
an
important
concern
domain
evolutionary
biology.
Organs
display
markedly
size
among
populations
along
environmental
gradients
this
associated
with
changes
oxygen
supply
energy
demands.
Here,
we
investigated
geographical
the
relative
organs
(i.e.,
brain,
heart,
lung,
gallbladder,
livers,
spleen,
kidneys,
digestive
tract)
14
Andrew’s
toad
(
Bufo
andrewsi
)
transcending
elevational
range
864
2,367
m,
spanning
8°
latitude.
We
found
that
although
sizes
eight
specific
varied
significantly
populations,
none
organ
was
affected
by
altitude
However,
based
on
combined
new
data
published
a
negative
relationship
between
heart
latitude,
contrasting
Hesse’s
rule.
also
livers
positively
linked
suggesting
more
demands
intakes
due
slower
metabolism
high
latitude
shaped
evolution
larger
livers.
Animal Biology,
Journal Year:
2018,
Volume and Issue:
69(3), P. 281 - 292
Published: Oct. 24, 2018
Abstract
Sexual
selection
theory
states
that
the
premating
(ornaments
and
armaments)
sexual
traits
should
trade
off
with
postmating
(testes
ejaculates)
traits,
assuming
growing
maintaining
these
is
expensive
total
reproductive
investments
are
limited.
Male-male
competition
sperm
predicted
to
affect
how
males
allocate
their
finite
resources
traits.
Here,
we
studied
relative
expenditure
on
pre-
among
82
species
for
three
mammalian
orders
varying
population
density
using
comparative
phylogenetic
analysis.
The
results
showed
affected
size
dimorphism
(SSD)
in
both
Artiodactyla
Carnivora,
but
not
Primates.
However,
testis
mass
were
by
density.
Moreover,
did
find
associations
between
SSD
or
taxonomic
groups.
interspecific
relationships
postcopulatory
change
increased
Our
findings
suggest
variation
relationship
orders.
Animal Biology,
Journal Year:
2020,
Volume and Issue:
70(3), P. 239 - 250
Published: March 19, 2020
Abstract
Organisms
living
in
extreme
environments,
such
as
amphibians
inhabiting
the
Tibetan
plateau,
are
faced
with
a
magnitude
of
potentially
strong
selection
pressures.
With
an
average
elevation
exceeding
4500
m,
plateau
is
mainly
characterized
by
low
temperatures,
but
little
known
about
influence
this
factor
on
growth,
development,
and
behaviour
amphibian
larvae
environment.
Using
common
garden
experiment,
we
studied
temperatures
early
growth
development
tadpoles
brown
frog
(
Rana
kukunoris
)
endemic
to
eastern
plateau.
We
discovered
that
temperature
had
significant
tadpoles,
those
undergoing
high-temperature
treatment
growing
developing
faster
than
their
siblings
from
low-temperature
treatment.
However,
high-altitude
individuals
grew
low-altitude
at
while
opposite
was
true
high
temperatures.
These
results
support
adaptation
hypothesis,
tadpoles’
developmental
rates
were
maximized
experienced
native
environments.
suggest
variation
ambient
temperature,
combined
evolutionary
local
probably
one
most
critical
environmental
factors
shaping
altitudinal
differences
