Fish Physiology and Biochemistry,
Journal Year:
2024,
Volume and Issue:
50(4), P. 1849 - 1860
Published: July 10, 2024
Abstract
Classical
assessments
of
new
fish
feeds
are
anthropocentric,
focusing
mainly
on
growth.
Although
this
methodology
is
accurate,
it
does
not
consider
the
fish’
perspective.
This
study
aimed
to
investigate
behavioural
responses
and
feed
preferences
Nile
tilapia
(
Oreochromis
niloticus
)
gilthead
seabream
Sparus
aurata
through
a
self-selection
trial
using
self-feeders.
Both
species
were
offered
three
feeds:
control
(PD)
commercial-like
two
diets
(ORG1
ORG2)
formulated
with
different
inclusions
alternative
ingredients
address
some
current
environmental
concerns
and/or
ethical
issues
often
associated
commercial
formulations.
Three
groups
an
average
weight
163.0
g
±
4.3
(mean
SD)
four
seabreams
174.7
27.0
tested.
Tilapia
exhibited
preference
for
ORG2
(46.5%),
influenced
by
sensory
properties
post-ingestion
signals.
Seabream
did
show
any
feed.
These
findings
highlight
effectiveness
experiments
in
allowing
express
their
feeding
behaviour
preferences.
Therefore,
approach
should
be
considered
initial
screening
design
aquaculture
ingredients.
Journal of Marine Science and Engineering,
Journal Year:
2024,
Volume and Issue:
12(5), P. 815 - 815
Published: May 14, 2024
This
study
aimed
to
explore
the
effect
of
FM
substitution
by
defatted
Tenebrio
molitor
larvae
meal
(dTM)
on
response
European
seabass
an
acute
stress
challenge.
An
FM-based
diet
was
used
as
a
control
and
two
other
isoproteic/isoenergetic
diets
were
formulated
replace
50
100%
dTM.
Each
tested
in
quadruplicate
groups
15
fish
(69
±
5
g)
fed
until
visual
satiety
for
16
weeks.
After
feeding
trial,
subjected
1
min
air
exposure
followed
h
recovery
before
sampling.
The
haematological
profile,
plasma
metabolites,
humoral
immunity
biomarkers,
well
hepatic
oxidative
antioxidant
capacity,
analysed.
A
clear
observed
significant
increase
haemoglobin,
haematocrit,
red
blood
cells,
almost
all
evaluated
metabolites
parameters,
regardless
dietary
treatment.
obtained
results
demonstrated
that
partial
IM
did
not
affect
seabass.
However,
total
replacement
increased
activity
peroxidase
superoxide
dismutase
TM100.
Aquaculture Research,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
This
study
aimed
to
evaluate
the
effect
of
two
protein
sources
(black
soldier
fly
[
Hermetia
illucens
]
meal
[BSFM]
vs.
fish
[FM])
on
intake
target
“diet
preference”
in
juvenile
Nile
tilapia
(
Oreochromis
niloticus
)
by
a
self‐feeding
method
(trial
1).
Growth,
body
composition,
blood
parameters,
and
immunity
genes
expression
were
also
evaluated
be
correlated
with
behavioral
data
2).
Four
experimental
diets
prepared
containing
0%,
33%,
66%,
100%
BSFM
as
substitute
for
FM
protein,
which
considered
treatments
T0
(control),
T33,
T66,
T100,
respectively.
In
trial
1
(32
days),
60
juveniles
(77.97
±
8.5
g,
standard
error
mean
[SEM])
randomly
distributed
aquariums
(40
L).
Fish
challenged
select
among
A,
T33;
B,
T66;
C,
T100;
D,
T33
E,
F,
T66
T100
using
floating
food
halls
per
aquarium
provide
different
diets.
2,
240
(2.80
0.25
g)
16
tanks
The
design
was
completely
randomized
four
(T0,
T100)
replies.
fed
(5%
weight
[BW])
2
months.
For
results,
no
difference
observed
p
>
0.05).
allowed
conditions
F
preferred
or
low
content:
B
=
T0,
C
D
E
<
final
daily
gain
had
lower
values
when
animals
replacement
showed
viscerosomatic
indices
Moisture
total
higher
but
content
did
not
differ
from
Ethereal
extract
increased
rising
There
significant
differences
glucose,
creatinine,
high‐density
lipoprotein
(HDL),
low‐density
(LDL),
aspartate
transaminase
(AST),
alanine
(ALT)
Total
cholesterol,
triglycerides,
albumin
lowered
increase
dietary
gpx
,
il-8
il-10
tnf-α
sod
cat
tlr-1
myd
nf-κb
However,
il‐1
β
Diets
up
66%
affect
performance
tilapia.
preference
diet
33%
BSFM.
Aquaculture Nutrition,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
A
nutritional
bottleneck
in
salmonid
aquaculture
is
the
procurement
of
marine‐derived
compounds,
such
as
essential
amino
and
fatty
acids,
including
omega‐3
lysine,
methionine.
Therefore,
insects
containing
these
compounds
are
highly
promising
feed
ingredients.
The
present
study
evaluates
larvae
a
“marine”
insect
(
Coelopa
frigida
,
bristly‐legged
seaweed
fly
larvae,
SWFL)
reared
on
brown
algae
side
streams
ingredient
for
rainbow
trout
Oncorhynchus
mykiss
).
SWFL
contained,
dry
matter
basis,
60%
crude
protein
(CP),
3.5%
1.5%
methionine,
well
17%
lipids,
4%
eicosapentaenoic
acid
docosahexaenoic
acid.
Four
isoenergetic
ca
.
23
MJ
kg
−1
gross
energy)
isoproteic
45%
CP)
feeds
were
evaluated
10‐week
feeding
trial.
diets
included
control
25%
fish
meal,
commercial
reference,
two
substituting
40%
meal
with
either
or
partially
defatted
black
soldier
(BSFL)
Hermetia
illucens
SWFL‐fed
displayed
higher
specific
growth
rates
(SGR)
compared
to
BSFL‐fed
similar
SGR
reference
diet‐fed
fish.
Feed
intake
was
than
BSFL
diet.
conversion
ratio
fed
control,
suggesting
lower
bioavailability
both
meals
meals.
No
difference
intestinal
health
parameters
noted
between
diet,
indicating
good
across
all
treatments.
However,
changes
electrogenic
transport
observed
diets,
illustrating
heterogeneous
effect
different
products.
Overall,
alternative
marine
ingredient,
compatible
circular
production
systems,
it
can
be
efficiently
cultivated
using
streams.
