A History of Pain Studies and Changing Attitudes to the Welfare of Crustaceans
Animals,
Journal Year:
2025,
Volume and Issue:
15(3), P. 445 - 445
Published: Feb. 6, 2025
Early
discussions
about
possible
pain
in
crustaceans
often
comprised
speculation
and
anecdotes.
Experiments
to
investigate
took
guidance
from
these
early
debates,
studies
on
other
taxa.
Many
experiments
provided
data
that
are
consistent
with
the
idea
of
pain.
However,
does
not
mean
has
been
proved,
but
they
open
possibility.
With
each
study
is
being
felt,
probability
increases,
we
will
probably
never
have
conclusive
proof.
Some
responses
appear
be
nociceptive
reflexes;
however,
at
least
indicate
animal
responds
stimuli
such
as
tissue
damage,
heat,
acid,
alkaline,
or
electric
shock.
The
said
only
if
cannot
explained
by
reflexes.
These
encouraged
various
organisations
improve
welfare
crustaceans,
e.g.,
PETA,
Crustacean
Compassion,
RSPCA,
British
Veterinary
Association,
UFAW,
HSA.
They
also
formed
much
evidence
included
highly
influential
review
sentience
for
UK
government
resulted
inclusion
decapod
Animal
Welfare
(Sentience)
Act
2022.
This
recognises
sentient.
By
contrast,
New
York
Declaration
there
a
possibility
sentience.
Others
argued
against
crustaceans.
Nevertheless,
2022
an
impetus
groups
campaign
improved
welfare.
retailers
now
require
slaughter
techniques
shrimp/prawn
sell,
electrical
stunning
preferred
method.
Language: Английский
Effects of Acetic Acid and Morphine in Shore Crabs, Carcinus maenas: Implications for the Possibility of Pain in Decapods
Animals,
Journal Year:
2024,
Volume and Issue:
14(11), P. 1705 - 1705
Published: June 6, 2024
Noxious
chemicals,
coupled
with
morphine
treatment,
are
often
used
in
studies
on
pain
vertebrates.
Here
we
show
that
injection
of
caused
several
behavioural
changes
the
crab,
Carcinus
maenas,
including
reduced
pressing
against
sides
enclosure
and
more
rubbing
picking
at
mouth
parts
and,
least
for
a
short
time,
defensive
displays.
Subsequent
acetic
acid
into
one
rear
leg
injected
was
held
vertically
off
ground.
These
activities
directed
or
involving
specific
consistent
previous
observations
behaviour
following
noxious
stimuli
idea
decapods
experience
pain.
Further,
but
not
water
induced
autotomy
these
animals.
Because
is
temporally
associated
behaviour,
it
possible
pain-related
response.
Acetic
clearly
substance
when
applied
to
decapods.
However,
had
no
effect
thus
there
evidence
an
analgesic
effect.
did
interfere
effects
morphine.
The
towards
site
like
those
observed
injection,
external
application,
various
substances
present
study
adds
growing
body
knowledge
about
Language: Английский
Putative Nociceptive Responses in a Decapod Crustacean: The Shore Crab (Carcinus maenas)
Biology,
Journal Year:
2024,
Volume and Issue:
13(11), P. 851 - 851
Published: Oct. 22, 2024
Nociceptors
are
receptors
that
detect
injurious
stimuli
and
necessary
to
convey
such
information
from
the
periphery
central
nervous
system.
While
nociception
has
been
extensively
studied
in
various
taxa,
there
is
relatively
little
electrophysiological
evidence
for
existence
of
nociceptors
decapod
crustaceans.
This
study
investigated
putative
nociceptive
responses
shore
crabs,
specifically
their
response
mechanical
noxious
chemical
stimuli.
Extracellular
multi-unit
recordings
were
conducted
anterior
ganglion
circumesophageal
connective
ganglia
assess
responses.
Soft
tissues
at
joints
chelae,
antennae,
walking
legs
stimulated
using
acetic
acid
(noxious
stimulus)
von
Frey
hairs
(mechanical
stimulus),
while
nearby
activity
was
recorded.
The
results
indicate
tested
areas,
with
eliciting
shorter,
more
intense
neural
compared
acid.
Although
triggered
all
antennae
antennules
did
not
respond
Though
we
acknowledge
challenges
conducting
vivo
recordings,
future
research
should
focus
on
further
characterizing
nociceptor
because
suggest
presence
nociceptors.
Language: Английский