The evolution of sexual dimorphism in Chondrichthyes: drivers, uncertainties, and future directions
Environmental Biology of Fishes,
Journal Year:
2023,
Volume and Issue:
106(6), P. 1463 - 1475
Published: May 4, 2023
Abstract
Sexual
dimorphisms
are
abundant
in
natural
systems;
however,
their
ecological
and
evolutionary
significance
have
largely
been
neglected
with
respect
to
Chondrichthyes
.
A
number
of
reported
this
ancient
clade,
yet
there
remains
considerable
uncertainty
regarding
the
disparity
variation
present
extant
taxa,
processes
that
resulted
manifestation.
In
review,
I
summarise
our
current
understanding
sexual
chondrichthyans
consider
extent
which
existing
studies
favour
two
predominant
theories
evolution.
Throughout,
major
limitations
open
questions
field,
arguing
ultimately
additional
required
(both
regard
phenomenon
dimorphism
itself,
several
related
fields
including
genetics)
if
we
wish
fully
understand
Chondrichthyes.
Language: Английский
Reproductive behavior, seasonality, and distribution of three devil ray species (Mobula mobular, M. thurstoni, and M. munkiana) in the Southern Gulf of California, Mexico
Marine Biology,
Journal Year:
2023,
Volume and Issue:
171(1)
Published: Nov. 18, 2023
Abstract
We
examined
the
reproductive
behavior
(courtship
and
mating),
seasonality
its
distribution
in
three
Mobula
species,
spinetail,
bentfin,
Munk’s
devil
rays
(
M.
mobular,
thurstoni,
munkiana
)
southwestern
Gulf
of
California,
Mexico,
using
boat
surveys
(with
drone
in-water
observations)
n
=
69
survey
days),
spotter
planes
428
flights),
citizen
science
observations
31).
whether
(1)
grounds
existed
within
area
for
any
these
(2)
followed
seasonal
patterns,
(3)
if
this
was
similar
among
all
mobula
rays.
observed
221
events
2017
2021–2022,
mobular
10),
thurstoni
3),
208)
dispersed
along
312
km
eastern
Baja
California
Peninsula
between
4
m
6.3
away
from
coast.
Most
209)
occurred
La
Ventana
Ensenada
de
Muertos
areas.
Courtship
a
copulation
attempt
,
with
following
pattern
occurring
March
to
August,
peak
during
May
(81.9%
events).
displayed
previously
undescribed
behaviors,
such
as
“piggyback
leaps”
pre-copulatory
position
“courtship
vortex”,
where
122
individuals
were
circling
clockwise
direction
5
h
courtship
groups
joining
leaving
main
vortex
formation.
This
study
highlights
areas
critical
habitats
two
endangered
one
vulnerable
ray
species.
Language: Английский
Hormones and reproduction in chondrichthyan fishes
Elsevier eBooks,
Journal Year:
2024,
Volume and Issue:
unknown, P. 345 - 381
Published: Jan. 1, 2024
Language: Английский
Evidence of mating scars in female tiger sharks (Galeocerdo cuvier) at the Fernando de Noronha Archipelago, Brazilian Equatorial Atlantic
Environmental Biology of Fishes,
Journal Year:
2022,
Volume and Issue:
106(1), P. 107 - 115
Published: Dec. 19, 2022
Language: Английский
Observations of biennial reproduction in Caribbean reef sharks ‘Carcharhinus perezi’
Beckah Campbell,
No information about this author
Oliver N. Shipley,
No information about this author
Taeler R. Jones
No information about this author
et al.
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
10
Published: Jan. 11, 2024
Effective
management
and
conservation
of
threatened
species
biodiversity
requires
knowledge
reproductive
biology,
such
as
cyclicity,
mode,
age
at
maturity.
We
combined
endocrinology
in-situ
ultrasonography
to
examine
characteristics
female
Caribbean
reef
sharks
Carcharhinus
perezi
,
a
widely
distributed,
marine
predator
which
remains
largely
understudied
throughout
its
range.
Unique
this
study
was
the
opportunity
conduct
longitudinal
assessments
two
individuals,
recaptured
across
multiple
seasons
during
sampling
in
The
Bahamas.
Within-individual,
paired
hormone
analyses
ultrasounds
that
were
confirmed
either
pregnant,
non-pregnant,
or
reproductively
active,
suggest
biennial
cycle
for
.
This
unique
assess
biology
same
individuals
over
time
underscore
importance
repeated
elucidating
population
cyclicity
highly
mobile
wild.
Language: Английский
Reproductive behavior of three mobulid species (Mobula mobular, Mobula thurstoni and Mobula munkiana) in the Southern Gulf of California, Mexico
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: June 16, 2023
Abstract
We
examined
the
reproductive
behavior
(courtship
and
mating)
its
seasonality
in
three
mobula
species,
spinetail,
bentfin,
munk’s
devil
rays
(
Mobula
mobular,
M.
thurstoni
,
munkiana
)
southwestern
Gulf
of
California,
Mexico,
using
boat
surveys
(with
drones
in-water
observation)
(n
=
69
survey
days),
spotter
planes
428
flights)
citizen
science
observations
31).
whether
(1)
grounds
existed
within
area
for
any
these
(2)
followed
seasonal
patterns
(3)
if
this
was
similar
among
species.
observed
221
sessions
2017
2021–2022,
mobular
10),
3),
208)
dispersed
along
312
km
eastern
Baja
California
Peninsula
between
4
m
to
6.3
away
from
coast.
Most
events
209)
occurred
La
Ventana
Ensenada
de
Muertos
area.
Courtship
mating
with
following
a
pattern
occurring
March
August,
peak
during
May.
displayed
previously
undescribed
behavior,
“courtship
vortex”,
where
122
individuals
were
circling
clockwise
direction
five
hours
groups
joining
leaving
main
vortex
formation.
This
study
highlights
as
critical
habitat
endangered
vulnerable
mobulid
Language: Английский