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CONTENTS YEAR 1987
1. |
Asian J. Exp.
Sci., Vol. 3, No. 1, 1987; 1-9
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Food and
Feeding Habits of Rana
limnocharis
Wiegmann, the Common
Frog Species of Meghalaya, India
Debjani Roy
Institute of Self Organising
Systems and Biophysics,
North-Eastern Hill University, Bijni Complex,
Bhagyakul, Shillong-793003, India. |
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The diet of Rana
limnocharis Wiegmann, the streaked frog, commonly available
at Shillong (1515m a.s.l., 90º7’E ; 24°0’N) and neighbouring
north-eastern hills of India has been investigated. The volume
of food intake fluctuates between 0.10 ml to 0.60 ml in males
and 0.25 ml to 0.80 ml in females during the year, minimum being
in January and February, due to hibernation. Ants (Formicoidea)
formed the highest food percentage recorded throughout the year.
A 12-month analysis was also done. It was noted that this frog
has food intake even during hibernation, although volume remains
minimum. Percentage of Formicoidea remarkably high during
hibernation. |
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2. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 10-14
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Histochemical Observations
on the Corpus Allatum of Adult Female Sphaerodema rusticum FAB.
(Belostomatidae: Heteroptera)
S. C. Pathak
Rani Durgawati University, Jabalpur-482001 (M.P.)
Department of Biological Sciences
The corpus allatum of adult
female Sphaerodema rusticum has been tested for proteins,
lipids, carbohydrates and nucleic acids. It is noticed that the
secretory cells of the active gland have a rich amount of
protein, but are very rich in lipids. A fair amount of
glycoproteins is also present in the cytoplasm of these cells.
RNA content is very high, particularly in the nucleolus and
nucleolar extrusions, the latter having been noted within the
nucleus, on the nuclear membrane, and even in the cytoplasm,
close to the nuclear membrane in the active stages. These
histochemical and cytochemical observations have been discussed
with reference to the nature of the secretory product of the
gland. |
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3. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 15-22
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Limnological Factors Affecting Distributional Pattern of
Fredericella sultana (Ectoprocta: Phylactolaemata) |
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Pradeep Shrivastava1 and Arun
Raghuwanshi2
1. Department of Limnology,
Bhopal University, Bhopal
2. Department of Biosciences,
Bhopal University, Bhopal
The seasonal distribution of a
freshwater bryozoa, Fredericella sultana was studied. The study
included a river and 8 lentic water bodies of varying ecological
conditions. Year round observations were made to study variation
in temperature, turbidity and growth characteristic of the
species of bryozoa. Turbidity was calculated in terms of
transparency with a Secchi disk. Both the physical factors,
temperature and turbidity increased as the summer approached.
Biomass in terms of g.m.-2 was calculated by using a 1 m.sq.
quadrate. Wet weight of the colonies, collected, was obtained to
know biomass. The biomass decreased towards summer to finally
disappear completely at the end of summer. The growth increased
as the temperature went down in winter. |
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4. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 23-26
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Occurrence of
Paraganglion Cells in the Cardiovascular System of Lower
Vertebrate |
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Santosh Kumar
Department of Biosciences
Bhopal University, Bhopal (M. P.)
The blood vessels and heart of Fish
and Amphibia have been studied with the help of varieties of
neurological techniques. The present study reveals that various
layers of the blood vessels and heart are provided with nerve
plexuses and ganglion cells. The nuclei of these nerve cells are
spherical and eccentrically positioned within the cell. Close to
these cells are present paraganglion cells. These cells have
argentophilic granules. The ultrastructure of the cell shows
that it has dense homogeneous content which is surrounded by a
clear limiting membrane is separated by a clear zone. The
argent-affinity of granular contents is accompanied with
chromaffinity and it is suggested that granules release
catecholamines. These paraganglion cells have been migrated from
the sympathetic ganglia through nerves. |
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5. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 27-36
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Some Observations on the Caudal
Neurosecretory Motoneurons of Anurans |
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Rajendra Chapra
Department of Zoology,
Govt. Science College, Jabalpur - 482001 (M.P.)
Caudal
neurosecretory system was studied in three frogs-Rana
limnocharis, Rana cyanophlyctis and
Rana tigrina,
a
toad Bufo melanostictus and a tree frog Microhyla
ornata. Urophysis and Dahlgren cells as seen in fishes were
not noticed. Giant motoneurons were present in the ventro-lateral
grey of spinal cord, from 5th to 9th vertebra level. A clear
secretory activity along with nucleolar extrusions, followed by
active participation of Golgi apparatus was seen in their cyton.
Secretory granules are transmitted through the axons directly in
the blood. Venous pathway passes through gonado- renal junction
and this has not been reported earlier. It appears that the
evolution towards terrestrial mode of life leads to respective
reduction in the number of motoneurons, reduction in their area
of distribution and change of position from fishes to frog to
tree frog. It is suggested that the Dahlgren cells of fishes get
modified into motoneurons of amphibians and they act both as
neurosecretory as well as neurotransmitter neurons. More than
one hormone appears to be secreted by these motoneurons as
suggested by the presence of three tinctorial types and three
secretory zones. |
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6. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 37-44
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Beryllium
Induced Glycogen Mobilization in Albino Rats |
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Seema Mathur, Shashi Sharma,
Anand O. Prakash and R. Mathur
School of Studies in Zoology,
Jiwaji University, Gwalior-474011.
Effect of beryllium nitrate on the
glycogen content of various of adult female albino rats has been
studied through two different routes. Intravenous administration
of beryllium nitrate at a dose of 0.316 mg/kg body weight and
intramuscular injection at ?? mg/kg. body weight decrease the
glycogen content of various organs significantly after 2, 10 and
30 days of dose administration. Intravenous administration
induces toxic effects at shorter durations whereas intramuscular
route evokes toxic effects slowly and gradually which persist
for longer duration. It has also been observed that toxicity
caused through intravenous route is comparatively higher to that
of intramuscular route. It has been suggested that intramuscular
administration of beryllium nitrate has depot effect in the
muscles from which it is released gradually to induce toxic
effects which are retained for longer duration. |
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7. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 45-55
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Structural
Changes in Response to Increased Environmental Salinities in the
Corpuscles of Stannius of Notopterus Notopterus (Pallas) |
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Usha Narwariya and O. P. Gupta
Department of Zoology,
Dr. Harisingh Gour Vislzwavidyalas
Sagar - 470003 (M.P.)
Environmental adjustment also involves corpuscles of
stannius in teleosts. Secretion of these endocrines appears to
be specially important in the maintenance of homeostasis in fish
adapted to different salinities. Our cytophysiological
observations showed that corpuscles of stannius in saline medium
become hypertrophied and highly active due to stress of transfer
from fresh water to saline solution, calcium contents of the
external medium and also an imbalance in the production and
secretion of a number of hormones. The other probable reasons
have also been discussed. |
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8. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 56-64
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Frequency
Distribution of the Oral Sucker and Ventral Suckers of
Spinometra gigantica (Plagiorchiidae : Trematoda); their
Relative Growth Rates and Comparison with that of the Body Wall
through Correlation and Regression |
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Deepa Dwivedi and Santosh Kumar
Department of Biosciences,
Bhopal University, Bhopal (M.P.)
PThe Frequency distribution (FD) of oral sucker (OS) and ventral
suckers (VS) have been worked out in 79 specimens of
Spinometra gigantica collected from the intestine of
Kachuga kachuga. In the present study FD have been found to
obey the Quetelets principle. The middle class is modal hence
the distribution is of Normal type which is also evident from
histograms and frequency polygons. Scatter diagrams between OS,
VS; BL, OS and BL, VS indicate positive correlation. Coefficient
of rank correlation (r’) between these variaties show linear
correlation. The values of coefficient of correlation (r)
between these sets of variates indicate positive correlation
(+0.952, +0.963 and +0.971) which has also been indicated by the
values of PE. The r>6 PE therefore r is definitely significant.
Coefficient of regression (byx and bxy) have been computed which
indicate that the growth rate of VS is faster than that of the
OS. Regression lines have also been drawn to show regression of
one variate upon another. |
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9. |
Asian J. Exp. Sci,
Vol. 3, No. 1, 1987, 65-70
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A Method for
Localizing and Studying the Conducting System in Malformed
Cattle Hearts on Behalf of Human Cardiosurgery (An Animal
Friendly Model)
C.J. van Nie DVM
Retired co-laborator of the Department of Anatomy and
Embryology,
Medical Faculty, Free University,
Amsterdam, The Netherlands,
Correspondance
address: Loevestein 15, 2352 KN,
Leiderdrop, The Netherlands
The macroscopical and microscopical
techniques deseribed for studying the location and structure of
the conducting system in cases of a persistent common
atrioventricular canal in hearts derived from sacrificed or
slaughtered cattle might be used in a comparative morphological
animal friendly model for the study of the condition in question
in human hearts. |
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