Metagenomic Insights Into the Dietary Diversity of the Adaptive Radiation of Cichlid Fishes in Lake Tanganyika
Molecular Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
Diet
specialisation
is
a
main
driver
of
diversification
in
many
adaptive
radiations.
Therefore,
identifying
diet
items
essential
to
characterise
trophic
specialisations
and
understand
the
dynamics
dietary
adaptations.
In
this
study,
we
explored
niches
56
species
from
radiation
cichlid
fishes
Lake
Tanganyika,
encompassing
all
major
phylogenetic
lineages
feeding
specialisations.
We
employed
metagenomic
sequencing
approach
identify
food
sources
investigated
at
high
taxonomic
resolution,
over
400
digestive
content
samples
wild-caught
individuals
around
50
million
paired-end
read
depth
per
sample.
Our
analyses
revealed
Arthropoda,
Chordata
(fishes),
Bacillariophyta
Streptophyta
as
primary
phyla
Tanganyikan
cichlids.
Moreover,
confirmed
presence
other
identified
taxa
not
previously
documented
be
part
cichlids'
diet.
Based
on
their
compositions,
cichlids
can
grouped
into
herbivores,
invertivores,
piscivores
mixed
feeders.
Further,
showed
that
disparity
shaped
by
rapid
divergence
cases
niche
convergence.
composition
correlated
with
carbon
nitrogen
stable
isotope
values,
gut
length,
body
morphology.
Differences
diet-such
consumption
diatoms,
streptophytes
chlorophytes
versus
fish
arthropods-were
associated
changes
body,
upper
oral
jaw
lower
pharyngeal
shape.
Collectively,
study
presents
comprehensive
detailed
classification
cichlids,
highlighting
power
approaches
delineating
Language: Английский
Insight Into Trophic Niche Differentiation in Labeobarbus (Cyprinidae) in the Luhoho Basin (Upper Congo Basin)
Ecology and Evolution,
Journal Year:
2025,
Volume and Issue:
15(4)
Published: April 1, 2025
ABSTRACT
Mouth
morphology
plays
a
crucial
role
in
determining
the
trophic
ecology
of
fish
and
sometimes
underpins
important
lineage
diversification.
Freshwater
teleost
species
belonging
to
genus
Labeobarbus
,
commonly
found
Africa,
exhibit
intra‐
interspecific
variation
differences
lower
jaw
occurring
within
between
species,
respectively.
Different
phenotypes
include
curved
U‐shape
(‘rubberlips’),
straight
(‘chiselmouth’)
an
intermediate
known
as
smiling
phenotype.
In
some
cases,
originates
from
hybridisation
chiselmouth
rubberlips.
However,
relationships
different
mouth
morphologies
taxa
are
still
not
well
understood,
particularly
Congo
Basin.
Understanding
can
enhance
understanding
adaptive
processes
morphologically
diverse
lineages.
This
study
aims
investigate
how
among
multiple
Luhoho
River
(Upper
Basin)
link
with
niche
uses.
We
combined
information
gut
morphometry,
contents
stable
isotope
analyses
on
202
specimens
representing
six
across
four
tributaries
Middle
Luhoho.
All
approaches
consistently
revealed
partitioning
rubberlip
respectively,
more
herbivorous/detritivorous
insectivorous
omnivory
spectrum.
addition,
were
also
each
Interestingly,
phenotype
differed
strongly
those
other
at
all
sites
except
for
L.
paucisquamatus
which
niches
overlapped
Tchinganda.
The
pattern
suggests
subtle
strategies
partition
feeding
resources
when
they
occur
narrow
hydrographic
scale.
Language: Английский
Speciation and repeated origins of hypertrophied lips in parallel adaptive radiations of cyprinid fish from East Africa
Ecology and Evolution,
Journal Year:
2023,
Volume and Issue:
13(9)
Published: Sept. 1, 2023
The
evolution
of
convergent
phenotypes
is
one
the
most
interesting
phenomena
repeated
adaptive
radiations.
Here,
we
examined
patterns
thick-lipped
or
"rubberlip"
phenotype
cyprinid
fish
genus
Language: Английский
Liem’s paradox in parallel trophic diversifications of polyploid fish: from preadaptive polymorphism to trophic specialization
Hydrobiologia,
Journal Year:
2024,
Volume and Issue:
851(21), P. 5113 - 5135
Published: Aug. 16, 2024
Language: Английский
Biodiversity of Ethiopian aquatic ecosystems
Вестник Российской академии наук,
Journal Year:
2024,
Volume and Issue:
94(6), P. 569 - 580
Published: Sept. 20, 2024
For
40
years,
Russian
scientists
have
investigated
the
biodiversity
of
aquatic
ecosystems
Ethiopian
Highlands
(Ethiopia),
a
unique
hydrological
and
hydrobiological
region.
The
expeditions
took
place
in
all
six
main
river
basins
Ethiopia,
which
made
it
possible
to
describe
species
composition
distribution
fish
other
organisms.
discovery
so-called
“species
flock”
cyprinid
fish,
consisting
4–6
morphotypes,
was
outstanding.
representatives
these
flocks
(including
previously
discovered
flock
lakeTana).
Information
on
ecology
reproduction,
development,
age,
growth,
morphology,
nutrition
genetics
obtained
for
first
time.
Methods
artificial
reproduction
number
commercial
fishes
Ethiopia
been
developed.
In
addition,
knowledge
about
crustaceans
has
significantly
expanded.
Language: Английский