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STUDIES ON POST-NATAL DEVELOPMENTAL CHANGES IN REPRODUCTIVE ORGANS AND EFFECTS OF GONADOTROPHIN RELEASING HORMONE ON SPERMATOGENESIS IN NATIVE BUCK (Bidri, Capra hircus)

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Title STUDIES ON POST-NATAL DEVELOPMENTAL CHANGES IN REPRODUCTIVE ORGANS AND EFFECTS OF GONADOTROPHIN RELEASING HORMONE ON SPERMATOGENESIS IN NATIVE BUCK (Bidri, Capra hircus)
Ph.D; CVSc; TPTY; Acc No : T1161
 
Creator DHABALE, R.B
 
Contributor VENUGOPAL NAIDU, K (Major)
SURESH S., HONNAPPAGOL
SESHAGIRI RAO, A
HARAGOPAL, V
SREENIVASULU, D
 
Subject post-natal development; REPRODUCTIVE ORGANS; GONADOTROPHIN RELEASING HORMONE; BUCK; serum alkaline phosphatise; cholesterol; testosterone; Bidri, Capra hircus
 
Description THESES
ABSTRACT :
A systematic investigation on post-natal development of male
reproductive organs (testis and epididymis) and serum alkaline phosphatase,
cholesterol and testosterone levels of Bidri male kids in non-hormone and
hormone treated groups was undertaken. The study was undertaken in forty
two male kids.
The external morphometric examination i.e., body weight from birth
to nine months and scrotal circumference from four to nine months were
carried out in both groups of male kids at 15 days interval. The internal
morphometric and/or histological studies of testis and epididymis were
carried out from one, two, three, four, five, six, seven, eight and nine months
of age. The serum alkaline phosphatase, cholesterol and testosterone were
estimated from one to nine months of age at 15 days interval. In addition to
these, the testosterone was estimated 3 hours before GnRH injection and 3
hours after GnRH injection on hourly interval at the beginning of 4th and 5th
months.
There were significant differences in body weight and scrotal
circumference between ages. The testicular weight and measurements were
increased significantly with advancement of age during four to nine months.
Non-significant difference between left and right testis weight and
measurements with in age in both hormone and non-hormone groups, but
left testicular values were slightly more than right testicle. The overall mean
of the testicular weight and measurements were significantly higher in
hormone treated male kids than non-hormone kids.
One to three month age seminiferous cords contained supporting cells
and gonocytes. The developmental stages of spermatogenic cells were
appeared in subsequent months like spermatogonia, spermatocytes and
spermatids in the seminiferous tubules in both the groups. The first
appearance of spermatozoa at eight months in non-hormone and seven
months in hormone groups. Mature Leydig cells were seen between five
and six months of age in hormone and non-hormone groups, respectively.
Appearance of lumen in seminiferous tubules was encountered at six months
of age in both the groups. The diameter of tubules increased with the age in
both groups. The overall mean diameter of seminiferous tubules were
significantly higher in hormone treated (138.62±11.32 μm) than the nonhormone
(114.64±11.14 μm) group.
The epididymal measurements were increased with the age in both
pre and post-weaning male kids. The diameter of epididymal tubules were
increased from caput through corpus to cauda in all the ages. The overall
mean diameter of epididymal tubules was significantly higher in hormone
treated group than non-hormone group.
The epithelial height of caput and corpus was increased with age. But
in cauda epididymis the epithelial height increased upto six months of age,
then decreased from six to nine months of age in both the groups. The
overall mean epithelial height was significantly higher in hormone treated
than non-hormone groups of male kids.
Alkaline phosphatase was not showing any trend. Non-significant
difference in alkaline phosphatase levels between one to three months of age
was observed. The overall mean alkaline phosphatase was significantly
higher in hormone (148.79±3.23 U/L) treated than non-hormone
(112.15±1.87 U/L) group.
The cholesterol concentration was fluctuating from 173.38±28.75 to
204.34±28.75 mg/dl between one to three months of age. There was
significant difference in serum cholesterol level between ages in both
groups. The overall mean serum cholesterol was significantly higher in
hormone (200.44±6.18 mg/dl) than non-hormone (178.66±6.26 mg/dl)
group.
Serum testosterone concentration was less than 1.23±0.31 ng/ml up to
3 months of age. The values were observed to increase to higher
concentration up to 6.5 months and the peak concentration of testosterone
was noticed at 5.5 months (4.43±0.93 ng/ml) in hormone whereas in nonhormone
(3.02±0.82 ng/ml) the peak level was at 6.5 months of age. Higher
testosterone concentration was recorded in 2nd hour samples following
hormone injection during 4th and 5th months of age.
DEPARTMENT OF ANIMAL REPRODUCTION AND GYNAECOLOGY,
COLLEGE OF VETERINARY SCIENCE, TIRUPATI,
SRI VENKATESWARA VETERINARY UNIVERSITY, TIRUPATI
 
Date 2016-12-15T19:27:30Z
2016-12-15T19:27:30Z
2007-03
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/90392
 
Language en
 
Format application/pdf
 
Publisher SRI VENKATESWARA VETERINARY UNIVERSITY, TIRUPATI - 517 502 (A.P) INDIA.