Download chemical composition of the retractile muscle and response to

CHEMICAL
COMPOSITION
OF THE RETRACTILE
MUSCLE AND RESPONSE TO EXTERNAL STIMULI BY
THREE SPECIES OF GIANT AFRICAN LAND SNAILS
BY
OYINLOYE, NAOMI ADEOYIN
MATRIC. NO: 20091534
A RESEARCH
BIOLOGICAL
PROJECT
REPORT SUBMITTED
SCIENCES DEPARTMENT
TO
(ZOOLOGY
OPTION)
COLLEGE
OF NATURAL SCIENCES,
FEDERAL UNIVERSITY
OF AGRICULTURE,
IN PARTIAL FULFILLMENT
OF THE REQUIREMENT
THE AWARD OF DEGREE OF BACHELOR
BIOLOGICAL
ABEOKUT A.
FOR
OF SCIENCE IN
SCIENCES WITH OPTIONS IN ZOOLOGY.
This is to certify that this report was written by OYINLOYE, NAOMI ADEOYIN,
matriculation number 20091534 of Biological Sciences Department (Zoology option),
Federal University of Agriculture, Abeokuta.
Dr. K.O. Ademolu
Project supervisor
Prof. M. Kadiri
H.O.D
A comparative
analysis of the rate of response of three species of giant African land
snails (Archachatina
margianta.
Achatina
achatina
and Achatina fulica)
to some
external stimuli (pain, cold water at 4°C, hot water at 100°C and 0.02mglml
NaCI
solution) was investigated.
The result showed that A. marginata
has the lowest mean
retraction rates (12.25sec.
and 4.75sec.) to two out of the four stimuli (hot water at
100°C and 0.02mglml NaCl solution) Achatina achatina retracted faster (6.00sec.) to
pain while A. fulica retracted fastest (6.50sec.) to cold water at 4°C. Although there was
no significance difference (P=0.208) in mean rates of retraction, the mean difference in
the protraction
rates was significant
(P=0.082).
Chemical
analysis
of the retractile
muscles in the snails revealed that A. achatina recorded the highest level of glucose and
lipids (8.30mgldl
(16.10gll)
and 46.9mgldl)
and A. fulica
in their various columella
recorded the highest protein content
muscles. Archachatina
highest glucose and protein contents (22.00mgldl
marginata
recorded the
and 86.40gl1) in its foot muscle.
Enzymes analysis also revealed that A. marginata recorded the highest lipase activity
(0.71mglg), A. achatina with highest a-glucosidase
and cellulase activities (0.71 mg/g
and 1.28mg/g) while amylase activity was highest (2.61mglg)
analysis
(3.00mglg)
A. fulica
revealed
that A. marginata
recorded
the highest
in A. fulica.
concentration
Mineral
of Na2+
in its columella muscle. Thus, A. marginata can be said to retract faster and
protracted
faster than other species of snail due to organic and inorganic
composition of the retractile muscles.