bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 9, 2024
Abstract
Fish
otolith
shape
provides
valuable
insights
into
the
taxonomic,
phylogenetic,
and
ecological
traits
of
fish
species.
This
study
aimed
to
assess
compare
phenotypic
variation
in
among
four
labrid
species
(
Anampses
femininus,
Coris
debueni,
Pseudolabrus
fuentesi
Thalassoma
lutescens
)
inhabiting
Rapa
Nui
(Easter
Island)
southeastern
Pacific
Ocean,
utilizing
geometric
morphometrics
aging
methods.
Age
estimation
based
on
structure
indicated
that
collected
specimens
were
adults,
ranging
between
1
3
years
old.
Allometric
analysis
revealed
low
but
significant
(5.40%),
primarily
driven
by
changes
width,
resulting
distinct
morphologies.
Principal
Component
Analysis
(PCA)
sagittal
otoliths
elucidated
morphospace
species,
with
first
two
PCs
explaining
60.3%
total
variance.
PC1
distinguished
elongated
shapes
(e.g.,
P.
robust
sagittae
T.
),
while
PC2
correlated
roundness,
delineating
variations
within
Canonical
variate
further
highlighted
differences
shape,
detected
all
The
Discriminant
function
showed
high
levels
discrimination
accuracy
for
most
species’
pairs.
Except
C.
debueni-P.
(89%)
debueni-T.
(96%),
other
pairs
achieved
100%
discrimination,
highlighting
reliability
as
a
distinguishing
characteristic
studied
Overall,
our
findings
emphasize
value
characterizing
offers
potential
applications
such
identifying
prey
digestive
systems
large
or
bird
predators
vicinity
this
isolated
island
South
Ocean
archaeofauna
studies.
Fisheries Research,
Год журнала:
2022,
Номер
253, С. 106370 - 106370
Опубликована: Май 27, 2022
Accurate
species
identification
of
harvested
fishes
is
a
central,
yet
often
overlooked,
component
fishery
monitoring.
This
study
examined
the
efficacy
using
otolith
shape
to
differentiate
between
morphologically
similar
grenadiers
Macrourus
caml
and
M.
whitsoni
validate
identifications
by
observers
within
adjacent
Ross
Sea
region,
Antarctica.
Otolith
information
was
collected
from
610
329
otoliths
research
collections,
where
confidence
in
high,
2558
samples
commercial
longline
catches.
Univariate
linear
discriminant
analyses
research-collected
revealed
consistent
differences
two
species,
with
being
larger
more
elongate
than
those
whitsoni.
No
significant
effect
collection
depth
or
fishing
season
on
evident
for
either
no
sampling
location
caml.
varied
slightly
among
regions,
although
extent
these
less
species.
To
observer
identifications,
random
forest
(RF)
model
trained
data
75%
samples,
validated
remaining
25%,
used
predict
observer-collected
samples.
The
RF
achieved
high
classification
success
individuals
an
Out-Of-Bag
error
rate
5.97%
training
dataset.
Overall
validation
dataset
96.2%,
96.8%
94.8%
correctly
classified.
Using
this
model,
90.6%
85.7%
sampled
were
predicted
as
identified.
Individual
ranged
50.5%
98.2%.
reliable
predictable
observed
indicates
that
our
approach
can
be
applied
ongoing
archived
collections
confirm
fishery-sourced
improve
accuracy
fisheries
monitoring,
facilitate
assignment
previously
material
level,
develop
high-confidence
datasets
further
biological
analyses,
understand
prioritise
needs.
More
broadly,
results
highlight
potential
effective
tool
assessing
programs.
Frontiers in Marine Science,
Год журнала:
2024,
Номер
11
Опубликована: Май 1, 2024
Improve
the
knowledge
base
on
ecomorphological
adaptation
of
teleost
species
to
different
environments,
trying
reconstruct
how
habitat
can
shape
sagittae
,
is
essential
for
conservational
purposes,
evolutionary
evaluations,
and
population
dynamics
studies.
Here
provided
a
comparative
study
between
features,
growth
rates
age
composition
two
Scorpaena
porcus
populations
inhabiting
Mediterranean
waters,
one
from
Strait
Messina
(Central
Sea)
Split
area
(Adriatic
Sea).
Additionally,
stomach
contents
specimens
have
also
been
analysed
provide
some
preliminary
information
diet
S.
.
A
total
ninety
individuals,
half
each
area,
obtained
extremely
environments.
Results
showed
an
overall
morphology,
shape,
morphometry
among
size
classes
investigated
populations.
Samples
were
characterized
by
most
elliptical
slender
with
more
regular
serration
margins
than
those
Split,
which
exhibited
wider
sagitta
enhanced
anti-rostrum
longer
rostrum
Concerning
diet,
preference
Crustacea
(especially
Brachyura
Amphipoda)
Teleost
species,
showing
differences
literature
data
other
geographical
areas
(Split
included).
confirmed
reliability
detect
inter-population
variability
areas,
tool
stock
assessment,
studies
investigation
habitats.
Canadian Journal of Fisheries and Aquatic Sciences,
Год журнала:
2021,
Номер
78(6), С. 681 - 692
Опубликована: Янв. 4, 2021
The
identification
of
fish
species
using
otolith
shape
has
been
common
in
many
fields
the
marine
science.
Different
analytical
processes
can
be
applied
for
morphological
discrimination,
but
reviewing
literature
we
have
found
conceptual
and
statistical
limitations
use
indices
wavelets
(contour
analysis),
being
specially
worrying
first
case
due
to
their
widespread
routine
use.
In
present
study,
42
were
classified
applying
traditional
machine
learning
classifiers
performance
measures
(accuracy,
Cohen’s
kappa
statistic,
sensitivity,
precision).
Our
results
conclusive;
a
more
adequate
option
classification
than
indices,
independently
considered.
artificial
neural
network
support
vector
provided
highest
values
all
wavelets.
cases,
sensitivity
precision
pointed
out
higher
confusion
between
some
patterns
indices.
Therefore,
strongly
discourage
species.
PLoS ONE,
Год журнала:
2023,
Номер
18(2), С. e0281621 - e0281621
Опубликована: Фев. 14, 2023
Mesopelagic
species
are
enjoining
increasing
attention
due
to
the
growing
impact
of
fisheries
activities
on
deep
marine
biocenosis.
Improving
knowledge
base
mesopelagic
is
required
enhance
their
conservation
gaps
regarding
many
and
families.
In
this
context,
otoliths
can
be
fundamental
assessing
life
history,
ecomorphological
adaptation
environment
stock
composition.
The
present
paper
aims
explore
saccular
utricular
morphology
intra-specific
variability
hatchetfish,
Argyropelecus
hemigymnus,
from
Strait
Messina.
Lapilli
sagittae
were
collected
70
specimens
separated
into
four
size
classes.
Morphometric,
shape
SEM
investigations
performed
describe
morphology,
contours,
external
structural
organization,
also
studying
intraspecific
related
sample
sizes
differences
between
otolith
pairs.
Results
showed
an
different
those
reported
in
literature
with
fluctuating
asymmetry
lapilli
belonging
Class
IV,
a
high
all
Data
herein
described
confirm
singularity
population
Messina,
shaped
by
unique
for
oceanographic
ecological
features.
BMC Ecology and Evolution,
Год журнала:
2024,
Номер
24(1)
Опубликована: Март 11, 2024
Abstract
The
garfish
Belone
belone
represents
the
only
valid
endemic
species
for
Mediterranean
Sea
and
eastern
Atlantic
Ocean.
It
shows
a
wide
global
distribution
range,
with
high
commercial
value
ecological
relevance
in
pelagic
domain.
Despite
this,
there
needs
to
be
more
knowledge
regarding
otoliths
of
this
species,
total
absence
descriptions
asterisci
lapilli
from
populations
lack
studies
on
reliability
shape
analysis
its
sagittae.
present
paper
aims
provide
first
main
contours
description
three
pairs
population,
providing
an
accurate
investigation
morphology,
morphometry,
intra-specific
variability
sagittae,
lapilli,
.
Results
showed
(i)
directional
bilateral
asymmetry
sexual
pairs,
(ii)
different
morphology
morphometry
than
those
described
literature,
(iii)
enhanced
between
sagittae
investigated
size
classes.
All
these
data
confirmed
studied
analysis,
showing
geographical
size-related
features
probably
related
genetics,
environmental
conditions,
life
habits
variations.
Journal of the Marine Biological Association of the United Kingdom,
Год журнала:
2024,
Номер
104
Опубликована: Янв. 1, 2024
Abstract
Saccular
otoliths
(sagittae)
have
long
been
shown
to
be
species-specific
and
exhibit
inland
geospatial
intra-
interpopulation
morphological
differences
with
variations
in
environmental
conditions.
Here,
we
analysed
outland
sagittae
shape,
length
(
Lo
),
width
Wo
perimeter
(Po),
area
(Ao),
fluctuating
asymmetry
(FA)
Chelon
auratus
males
females
collected
from
Ghar
El
Melh
(Tunisia)
Etoile
Bay
(Mauritania)
stations
assess
whether
shape
morphometry
differ
between
these
two
niches
having
different
At
the
intrapopulation
level,
a
significant
otolith
was
observed
left
right
left–left
right–right
among
of
population
symmetry
those
population.
found
otoliths'
populations.
Besides,
discriminant
function
analysis
contour
separated
at
levels
also
Moreover,
differential
,
Po,
Ao
levels.
Therefore,
conditions
ecological
effectively
induced
morphology.
These
asymmetries
were
discussed
terms
FA
caused
by
stress
resulting
abiotic
factors
niches.
Ege Journal of Fisheries and Aquatic Sciences,
Год журнала:
2024,
Номер
41(1), С. 8 - 15
Опубликована: Март 14, 2024
In
this
study,
the
morphology
of
sagittal
otolith
Salmo
coruhensis
Turan,
Kottelat
&
Engin,
2010
and
fahrettini
Kalayci,
Bektaş,
Kaya
Bayçelebi,
2020
from
Çam
Stream
(Artvin)
Terme
(Samsun)
was
described
by
images
scanning
electron
microscopy.
Its
shape
contour
were
also
analyzed
with
indices,
elliptic
Fourier
coefficients
wavelet
transforms.
As
study
material,
a
total
30
S.
sample
20
obtained.
Interspecies
differences
in
morphometry
evaluated
principal
components
analysis,
canonical
discrimination
permutational
multivariate
analysis
variance.
The
two
salmonid
species
studied
distinguished
both
morphometric
methods.
However,
transform
found
to
be
more
effective
than
indices
discrimination,
an
overall
classification
success
rate
80%.
Our
results
showed
that
saccular
could
additional
diagnostic
character
for
trout
differentiation.
