Oral and Poster Abstracts

814 Relationship between Some Blood Parameters and Carcass
Composition in Native Kid Goats of Boushehr Province (Iran)
M. Dashtizadeh 1 , MJ. Zamiri 2 , AA. Kamali 1 , AM. Kabirifard 1
1 Research Center of Agriculture and Natural Resources of Bousheher
(Iran), Animal Science, Brussels, Iran
2 Faculty of Agriculture, animal sciences, Shiraz, Iran
In meat producing chain and improve the genetic potential of strains
or breeds, there are several stages at which the need for methods of
measuring composition in live animal arises. One of these methods is
physiological predictors. The aim of this study was to investigate the
relationships of some blood parameters and carcass composition in
native kid goats. Forty-eight 7- to 8-month-old kid goats were
divided into three equal groups. From each group, 8 goats were feed
restricted for 45, 60 or 75 days, and 8 goats served as the control
group. Restricted groups were fed with a maintenance ration, and the
control goats were fed with a ration supporting 50 g of daily weight
gain. At the end of feed-restriction period, the restricted goats were
offered the same ration as the control goats. BUN was positively
correlated with %CP in DM (r=0.35) and negatively correlated with
%DM (r= -0.34) and %EE (r= -0.36) and %EE in DM (r= -
0.39).None of the coefficient between cholesterol and carcass
composition were significant. Creatinine was negatively correlated
with %CP (r= -0.34) and %CP in DM (r= -0.36). Also, creatinine
was positively correlated with %EE (r=0.30) and %EE in DM
(r=0.37). The results of this experiment showed that creatinine,
cholesterol and BUN cannot be good predictors of carcass
characteristics in native kid goats.
Key words: carcass characteristics, blood parameters, Native Kid
Goats
815 Changes in Estrogen and Progesterone Concentration in
Blood Plasma of Merghoz Goats during Natural Breeding
Season
M. Souri 1 , A. Moghaddam 2 , J. Talebi 1 , R. Mirmahmoodi 1
1 Razi university, Department of Animal Science, Kermanshah, Iran
2 Razi University/Faculty of Veterinary Medicine, Animal
Reproduction &AI, Kermanshah, Iran
Measurement of hormones level associated with reproductive
function in female animals can aid in the evaluation of their
reproductive status. The aim of this trail was to determine the profiles
of changes in progesterone (P4) and Estrogen (E2) in the goat
peripheral blood. Observation were made on Merghoz does (n=10) in
the autumn. The animals were housed in individual pens under
natural day length condition and feed a basal diet. The experimental
animals received two i.m injections of PGF 2a (PG), 12 days apart.
Blood samples from the jugular vein were collected once daily 3 days
before estrus till three days after next estrus. Serum was separated
and frozen at -20 until analysis. The clinical observations were
recorded and breeding was allowed after the natural cycle at the third
estrus. Forty percent and 100% of animals exhibited estrus 72-84 (75
± 3.0) and 72-78 (72.6 ± 0.06) hours after first and second PG
injection, respectively. The duration of the estrous cycle was
recorded as being 20.5 ± 0.37 (18-24) days. A 100% pregnancy rate
was recorded. The mean length of the gestation period was 145 ± 1.02
(141-150) days. The initial birth weight of male and female kids were
2.6 ± 0.08 (2.4-2.8) and 2.2 ± 0.24 (1.5-2.5) Kg, respectively. The P4
concentration was 2.1 ng / ml on the day -2 days and dropped to the
basal level (0.46 ng / ml) on the day 0 (Day estrus). The P4 level
increased steadily from the day 3 (1.6 ng / ml) and attained the
maximum level of 4.8 ng / ml and 12.5 ng / ml on the days 5
(metestrus) and 10 (the luteal phase) estrous cycle, respectively.
From the day 16, the hormone level (10.25 ng / ml) decreased
gradually and reached to 1.78 ng / ml and basal level of 0.42 ng / ml
on the days 19 (proestrus) and 21 (Day 0; next estrus), respectively.
The E2 concentration was 17.12 pg/ml on day -2 (proestrus) and
reached the maximum level of 22.7 pg/ml on the days 0 (estrus), 1
and 2. The E2 concentration decreased gradually from day 4 (18.21
pg/ml) and reached to 17.2 pg/ml on day 7 (metestrus and diestrus).
The E2 level increased from day 16 (16.29 pg/ml) and attained the
maximum level of 22.6 pg/ml on day 21 (next estrus). The results
suggested that the P4 and E2 profile is a useful indicator to assess the
reproductive status of the Merghoz goats.
Key words: Merghoz goats, progesterone, estrogen
816 Comparison of Efficiency of Few Methods of Estrus Induction
in Out of Season Goats
M. Dzieciol, R. Kozdrowski, J. Twardon
Wroclaw University of Environmental and Life Sciences, Veterinary
Medicine, Wroclaw, Poland
The objective of this study was to compare the efficiency of few estrus
induction protocols in anestrus goat, with the use of different ways of
progestagen administration and different length of treatment. The study
was conducted in April 2007 in Poland. Sixty five lactating goats having
had two to three lactations were used. All animals were under the same
feeding protocol. Does were assigned to five groups (A-E). In the group A
(n=25) does received intravaginal sponge containing 40 mg of flugestone
acetate FGA (Chronogest,Intervet) for 12 days, plus intramuscular
injection of 500 U.I. Pregnant Mare Serum Gonadotrophin (Folligon,
Intervet), 24 h before sponge removal. The group B gather ten animals
which received 0,044mg/kg of altrenogest (Regumate, Intervet) per os for
12 days, and Folligon intramusculary injection (500 U.I.) at the end of
treatment (day 13). In the group C (n=10) all does received 12,5 mg of
progesterone i.m. for 6 days. The same protocol (12,5 mg of progesterone
i.m.) but for 12 days concern does from group D (n=10). All animals from
group C and D received 500 U.I. PMSG (Folligon) i.m. at the 7 and 13
days respectively. The goats from group E (control group) did not
received any treatment. The blood samples for progesterone concentration
measuring, from 6 goats from every group was collected before and
during the treatment and after cessation of progestagens administration.
Following the termination of progestagen treatment, all the does were
observed for signs of estrus at eight hours intervals for a period of four
days. Does were mated with fertile males. The four kinds of treatment
showed significant differences in estrus response. In the group A - 72 %,
in group C - 60% and in the group D - 100% of animals showed signs of
estrus. Not any animals from group B showed signs of estrus, but in two
females from group E estrus signs had been observed. There was no
significant differences in time of onset of estrus (36,4 h ± 0,5) and the time
of duration of estrus (40,2 h ± 0,5). At the kidding time 15, 4, 7, and 2 does
delivered respectively from group A, C, D and E. Considering that
currently in Poland the vaginal sponge containing progestagens are not
commercially available, the good results of progesterone i.m.
administration for estrus stimulation during anestrus are valuable
information for breeders.
Key words: goats, estrus induction, progesterone
817 The Influence of the Hierarchical Structure of Herd, on the
Answer of Estrus Induction in Anoestrus Goats
M. Dzieciol, R. Kozdrowski, J. Twardon
Wroclaw University of Environmental and Life Sciences, Veterinary
Medicine, Wroclaw, Poland
The aim of the study was to find out if the position of the female in the
herd could play role in the answer on the artificial exogenous hormonal
stimulation of estrus, and fertility in the out of season goat. The
experiment was performed in April 2007 in Poland in the commercial
dairy goat’s herd. Fifty female goats after second or third lactation were
used in this study. All animals were under the same feeding protocol.
During the day animals stayed outside, grazed on pastures. Additionally,
twice a day, during milking time they had access to supplementary food.
In the first part of investigation the animals were observed and their
position in herds was qualified. The animals were classified in to the two
groups trough the direct observation method, according their status in the
flock, as a-high and low ranked goats (group H, L respectively). The
estrus induction was performed by using intravaginal sponge containing
40 mg of flugestone acetate (Chronogest, Intervet) for twelve days with
intramuscularly injection of 500 I.U. PMSG (Foligon , Intervet) 48 h
before sponges withdrawal. Also the fertile male was introduced to the
herd at the time of progestagen cessation. The male was exposed to the
female in closed pen located on the opposite part of feeding room. We
observed that the female from group H, which usually used to be as a first
at the feeding trough exhibited as a first estrus signs. These goats gather
around the male pen. There was significantly difference in the time of
approaching male by female and exposing the signs of estrus between
group H and L. There was no difference in fertility among both groups.
The results obtained during this study suggest that there is a relation
between the hierarchical position in herd and the time of estrus signs
exhibition in goats after estrus induction during anoestrus period.
Key words: goat, hierarchy, estrus induction
Sheep, Goat and Buffaloes 137