The concentrations of fecal E2 in non-pregnant civets in our
study ranged from 0.05 to 7.01 µg/g df, with an average of 1.07 ± 0.84
µg/g df and a peak of 3.22 ± 0.64 µg/g df. Although faecal estradiol
value of civets have not been published, faecal estradiol values in other
animals have already been widely used to monitor their sexual
activities. For example, faeal E2 of the Siberian tiger population
ranged from 0.39 to 0.49 µg/g and the mean faecal E2 of Bengal tiger
was 0.45 µg/g, and thoat of Sumatra tiger was 2.36 µg/g [89].
Changes in E2 levels showed a cyclic fertilization. The duration
of each cycle ranged from 26.8-33.1 days with the average of 28.6 ±
2.29 days. This period was comparable with that (27.0 days) of
Siberian tigers [89] and of Bengal tigers (29.3 days) [88], but different
from that of domestic cat (21 days) or leopard (10-20 days)[120]
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ical indicators, 14 blood and urine
biochemical parameters. All indicators were monitored in normal
health status, by age and by gender.
5
2.3.2.3. Blood sampling and analysis
- Blood samples were collected through the tail peduncle vein with
3ml syringe (needle size 25Gx1).
- Blood physiological indicators were performed by using
automated hematology analyzer Mindray BC 2800 Vet.
- Blood biochemical parameters were measured by chemical
analyzer (Abaxis Vetscan 2, Union City, CA, USA).
2.3.2.4. Urinary sampling and analysis
- Urinary samples were collected from the stainless steel floor of a
special barn by cylinder, 18-20 hours, 1 time/week for 1 month (for
each individual).
- Urinary biochemical norms were measured on an automated
analyzer (model Teco TC-101, Teco diagnostics, USA).
- Na+, K+ and Cl- analyzes were measured from the supernatant
obtained by the centrifugation of urine samples from the civets at 3000
rpm for 10 min (Roto x 32®-Hettich) and were performed on an ion
selective device (model Roche 9180, Roche Diagnostics,
Switzerland).
2.3.3. Study on changes in sex hormone content of female civets in
captivity
2.3.3.1. Materials
Fecal samples were collected from 12 mature female civets for 16
months.
2.3.3.2. Survey targets
Changes in the endocrine index: estradiol (E2), progesterone (P4)
of adult female civets in the following cases: non-pregnant, pregnant
and pseudopregnancy.
2.3.3.3. Fecal sampling and extraction
6
Fecal samples were collected an average of 3 days, about 18h -
20h in 14 months. Fresh samples (5g) were collected in a plastic bag
and stored (-200C) until analysis. After thawing, 0.2 g was weighed
and placed in a glass jar containing 2 ml of 90% methanol. After
shaking for 30 min, the suspension was centrifuged at 1,700 x g for 20
min (on a shaker EAB 20). After centrifugation, approximately 1 ml
of the aqueous solution was extracted into 1.5 ml eppendorf vial and
frozen (-200C) until using (Frederick et al., 2010). The remainder is
returned to the glass vial and dried to determine the dry weight of the
stool.
2.3.3.4. Hormone assays
The fecal contents of P4 and E2 were determinned by using
fully automatic ELISA Dynex DS2 (Dynex, USA), Progesterone and
Estradiol ELISA Kit.
2.3.4. Study the effect of gonadotropin (PMSG, HCG) on
reproductive ability of the civets
2.3.4.1. Materials
A total of 54 mature female civets, after the survey were
classified into 3 groups:
- Group 1: Civets were slow to breed for the first time (after 24
months of age, there was no estrus manifestation); n = 14.
- Group 2: Slowly rejuvenating civets (after 12 months after birth,
no estrus have been seen); n = 15.
- Group 3: Low productivity breeding civets (1 litter/year;
number of civets per litter was small, 1-2 newborn/litter); n = 25.
2.3.4.2. Survey targets
- Changes in endocrine indexes: estradiol (E2), progesterone (P4)
after injection of PMSG and HCG (from 2 days before injection (day
7
-2) to the injection date (day 0) and 8 days later treatment.
- The duration of the civets’ oestrus after injection of PMSG and
HCG.
- Ratio of estrus civets (estrus civets/total number of treated
civets).
- Percentage of pregnancy civets (number of pregnant civets/total
number of treated civets).
- The average of newborn civets on the litter.
- Average weight of newborn civets.
- The proportion of live civets after 24 hours and after 1 month
(number of surviving civets /total number of newborn civets).
2.3.4.3 Type of reproductive hormones
Mixed PMSG / HCG (ratio 2: 1): trade name is Gestavet (United
Kingdom). Each vial contained 400 IU PMSG/200 IU HCG and vial
containing 5ml solvent for injection solution.
2.3.4.4. The treatments for injecting reproductive hormones
Control (ĐC): 0 IU PMSG + 0 IU HCG (No injection)
Treatment 1 (CT1): 20 IU PMSG + 10 IU HCG
Treatment 2 (CT2): 30 IU PMSG + 15 IU HCG
Treatment 3 (CT3): 40 IU PMSG + 20 IU HCG
The experiment was performed all treatments for civets in 3
groups. Each batch has 3 or more civets.
2.3.4.5. Experimental layouts
Table 2. 2. Experimental layout diagram
Group ĐC CT1 CT2 CT3
Group 1 (n=14) 3 4 4 3
Group 2 (n=15) 3 4 4 4
Group 3 (n=25) 3 7 7 8
2.3.4.6. Injection process
8
The female civets are injected intramuscularly (IM) at 8 AM.
2.3.4.7. Methods of determining hormone changes
Sampling procedure, stool extract, hormone test is done similarly
2.3.3.3 and 2.3.3.4.
2.3.4.8. Method of determining oestrus
- Observation method.
- Clinical method: monitoring pregnancy and childbirth of female
civets.
2.4. Data analysis
From the data obtained, conduct the calculation of statistical
parameters: average value (X̅), standard deviation (SD); ANOVA
analysis of a factor with a level of α = 0.05. Calculations were
processed by MS-Excel 2013 software.
CHAPTER 3. RESULTS AND DISCUSSION
3.1. Results of studying biological characteristics
3.1.1. Morphological characteristics and some behaviors of
civets in culture conditions
In terms of morphology, the civets in the captivity also has the
characteristics of the species as in natural conditions. The coat is gray
or moldy, sucking black fur; Vertebral vertebrae, black-brown ribs or
often forming three stripes along the spine from the shoulders to the
base of the ears. The tail has unknown streaks or is black at the base
of the tail, the tail is usually black, but in some civets it may be white;
the nose, cheeks, ears, lower thighs and four legs are black; gray belly.
When the civets are still young, the black brown stripe is not clear,
the hair is rough. The more you grow, the smoother the fur and the
9
dark brown the clearer. The face has 2-3 bright spots on the forehead
or the edge of the eyes.
Regarding nutritional characteristics, the civets are omnivorous.
Survey results showed that civets eaten many fruits. The favorite fruit
of civets is bananas. In breeding, depending on the season, it is
possible to change different food sources. In terms of animal feed,
civets especially like to eat meat, fish and eggs. According to Dang
Huy Huynh et al., (2010); Duckworth (2016), the civets is omnivorous,
they can eat most of the food that humans eat [7, 111].
The civets mainly act at night, sleep at day. Excretion activities
are mainly carried out at the beginning of the evening operation phase.
Civets has very high protective behavior. When grazing another child
into a barn, they will bite each other. The civet is only paired when the
offspring has arousal.
3.1.2. Growth characteristics of the civet civet in captivity
3.1.2.1. Volume growth
Survey results of mass growth rate of 64 civets were shown in Table
3.1.
Table 3. 1. Growth rate of the civets’ weight in captivity
Table 3.1 showed that the amount of civets that was monitored
has an uneven growth rate over the ages of months, which was
consistent with the periodic growth rules. Volume growth tended to
increase gradually from 3-12 months of age, then gradually slow down
X̅(g)
Sx Cv% A
(g/head/day)
Rw%
X̅(g)
Sx Cv% A
(g/head/day
Rw%
3 782 118.5 15.15 727 82.7 11.38 55 >0,05
6 1,152 126.1 10.95 4,11 a 38,26 a 975 125.3 12.85 2,76 b
29,14
b 177 <0,05
9 1,735 109.1 6.29 6.48 40.39 1,456 117.8 8.09 5.34 39.57 279 <0,05
12 2,644 113.5 4.29 10.10 41.52 2,225 113.7 5.11 8.54 41.78 419 <0,05
15 3,245 128.1 3.95 6.68 20.41 2,848 120.7 4.24 6.92 24.56 397 <0,05
18 3,533 108.5 3.07 3.20 8.50 3,175 118.9 3.74 3.63 10.86 358 <0,05
21 3,743 116.3 3.11 2.33 5.77 3,335 84.7 2.54 1.78 4.92 408 <0,05
24 3,925 105.2 2.68 2.02 4.75 3,516 93 2.63 2.01 5.28 409 <0,05
X̅ 5.14 20.22 4.71 21.16
Age
(month)
Male (n=32) (1) Female (n=32) (2)
X̅1 - X̅2 P
10
from 12-24 months. The period with the highest growth rate was from
9 to 12 months with the average absolute growth of each male being
10.1 g/head/day, growing relatively R% = 41.52%, These indicators
corresponded to females of 8.54 g/head/day and R% of 41.78%.
3.1.2.2. Growth in body length
The survey results of growth of civets’ body length were shown in
Table 3.2.
Table 3 2. Growth rate of body length of the civets in captivity
Table 3.2 showed that the growth rate of the civets’ body
length was slow down through the months of age. The fastest growth
phase of body length was the period of 3-6 months with absolute
growth of 2.87 cm/head/month, relative growth R% = 19.46% (for the
period of 3 months) in males and 2.57 cm/head/month, relative growth
of R% = 18.15% in females. After the 15th month, when the stem
length was close to the good limit of the species, the growth in the
period of 18-24 months was very small (0.10-0.76 cm/head/month).
3.1.2.3. Growth in tail length
The survey results of the civets’ tail length growth were shown in
Table 3.3.
Table 3. 3. Growth rate of the civets’ tail length in captivity
X̅(g)
Sx Cv% A
(cm/head/m)
Rw%
X̅(g)
Sx Cv% A
(cm/head/m)
Rw%
3 39.89 0.38 0.95 38.67 0.32 0.83 1.22 >0,05
6 48.49 0.44 0.91 2.87 19.46 46.39 0.46 0.99 2.57 18.15 2.10 >0,05
9 56.27 0.46 0.82 2.59 14.85 53.24 0.53 1.00 2.28 13.75 3.03 <0,05
12 62.55 0.55 0.88 2.09 10.57 59.01 0.55 0.93 1.92 10.28 3.54 <0,05
15 68.92 0.45 0.65 2.12 9.69 65.12 0.54 0.83 2.04 9.84 3.80 <0,05
18 70.36 0.77 1.09 0.48 2.07 67.41 0.31 0.46 0.76 3.46 2.95 <0,05
21 71.33 0.41 0.57 0.32 1.37 68.68 0.29 0.42 0.42 1.87 2.65 <0,05
24 71.62 0.41 0.57 0.10 0.41 69.03 0.30 0.43 0.12 0.51 2.59 <0,05
X ̅ 1.51 8.35 1.45 8.27
Age
(month)
Male (n=32) (1) Female (n=32) (2)
X̅1 - X̅2 P
X̅(g) Sx Cv%
A
(cm/head/m) Rw%
X̅(g) Sx Cv%
A
(cm/head/m) Rw%
3 36.44 0.93 2.55 36.02 1.18 3.28 0.42 >0,05
6 38.24 0.95 2.48 0.60 4.82 37.68 1.28 3.40 0.55 4.50 0.56 >0,05
9 41.45 0.91 2.20 1.07 8.06 40.82 1.18 2.89 1.05 8.00 0.63 >0,05
12 45.36 0.91 2.01 1.30 9.01 44.68 1.33 2.98 1.29 9.03 0.68 >0,05
15 48.64 0.91 1.87 1.09 6.98 48.19 1.34 2.78 1.17 7.56 0.45 >0,05
18 51.37 0.87 1.69 0.91 5.46 50.88 1.22 2.40 0.90 5.43 0.49 >0,05
21 54.25 0.80 1.47 0.96 5.45 53.57 1.25 2.33 0.90 5.15 0.68 >0,05
24 56.31 0.78 1.39 0.69 3.73 55.62 1.03 1.85 0.68 3.75 0.69 >0,05
X ̅ 0.95 6.21 0.93 6.20
Age
(month)
Male (n=32) (1) Female (n=32) (2)
X̅1 - X̅2 P
11
Table 3.3 shows that the growth of the tail length of the civets
increased relatively evenly over the period of age, however, increased faster
in the period of 6-12 months (R% from 8-10, 14%). The absolute growth
rate (A) averageed 0.95 cm/head/month, the relative growth rate (R%) was
6.21% (in males) and A = 0.93 cm/head/month, R% = 6.20% (in females).
3.1.2.4. Chest growth
The results of monitoring the dimension of chest girth of the
civets in captivity were shown in Table 3.4.
Table 3. 4. Growth rate of the civets’ chest girth in captivity
Table 3.4 showed that the chest girth growth rate was high in the
period of 3-12 months of age and highest in the 9-month period (A =
1.27 cm/head/month, R = 15.07% in males) and A = 1.06 cm/
head/month, R = 13.21% in females). This was in accordance with the
rules of fast chest growth rate in the sexual maturity stage in animals.
Age of sexual maturity of civets was in the period of 9-12 months of
age [111].
3.1.3. Reproductive characteristics of incense civet in captivity
3.1.3.1. Age of sexual maturity and estrus manifestations
Results of monitoring the age of sexual maturity of civets (32
female civets, 34 male civets) in captivity in the study were shown in
Table 3.5.
X̅(g) Sx Cv%
A
(cm/head/m) Rw%
X̅(g)
Sx Cv%
A
(cm/head/m) Rw%
3 21.21 0.92 4.34 20.83 0.81 3.89 0.38 >0,05
6 23.43 0.83 3.54 0.74 9.95 22.56 0.71 3.15 0.58 7.97 0.87 >0,05
9 27.25 0.75 2.75 1.27 15.07 25.75 0.70 2.72 1.06 13.21 1.50 <0,05
12 29.36 0.93 3.17 0.70 7.45 27.64 0.70 2.53 0.63 7.08 1.72 <0,05
15 29.87 0.92 3.08 0.17 1.72 28.24 0.74 2.62 0.20 2.15 1.63 <0,05
18 30.32 0.90 2.97 0.15 1.50 28.68 0.66 2.30 0.15 1.55 1.64 <0,05
21 30.54 0.86 2.82 0.07 0.72 28.93 0.82 2.83 0.08 0.87 1.61 <0,05
24 30.66 0.85 2.77 0.04 0.39 29.12 0.78 2.68 0.06 0.65 1.54 <0,05
X ̅ 0.45 5.26 0.39 4.78
Age
(month)
Male (n=32) (1) Female (n=32) (2)
X̅1 - X̅2 P
12
Table 3. 5. Age of sexual maturity of the civets in captivity
Note: Different characters in the same row are statistically
significant differences (P <0.05).
The table 3.5 showed that the female civets were starting to show
oestrus in the period of 10-14 months with an average weight of 2.38
- 2.62 kg. The average maturity was 11.96 months, with an average
weight of 2.50 kg. According to Nelson (2013), the estrus of civets
was between 11 and 12 months of age [112].
3.1.2.2. Mating activity, pregnancy rate and pregnancy time
During the study period, we monitored the reproductive results of
42 female civets, with 84 pairings. Results of monitoring pregnancy
rate and gestation period were presented in Table 3.6.
Table 3. 6. Pregnancy ratio and duration in the civets
Note: the characters in the same column are different, the difference
is statistically significant (P <0.05).
Age
(month) Number
Rate
(%) Weight (kg)
Age
(month) Number
Rate
(%) Weight
(kg)
9 0 0 9 2 5.88 1.84
10 4 12.50 2.38 10 9 26.47 2.45
11 5 15.63 2.43 11 14 41.18 2.56
12 9 28.13 2.51 12 6 17.65 2.61
13 6 18.75 2.58 13 3 8.82 2.86
14 3 9.38 2.62 14 0 0.00
Not mature 24-30 5 15.63 3.26 0 0
X̅ 11,96a 2,50 10,97b 2,52
SD 1.22 0.08 1.03 0.04
Parameter
Female (n=32) Male (n=34)
Mature
Place
No of mating
civets (n=84)
No of
pregnancy
civets (heads)
R (%)
Gestation length
time (days)
Dong nai 30 14 46,67a 61,2
Thu Duc 54 42 77,78b 60,8
X̅ 66.67 60.9
SD 1.3
13
3.1.3.3. Number of births per litter, survival rate, neonatal
characteristics and weaning age
Results of monitoring the number of young civets on litter,
neonatal characteristics and survival rates of 56 monitored parities
were presented in Table 3.7.
Table 3 .7. The number of piglets born on the litter and the survival
rate
Note: the characters in the same column are different, the differences are
statistically significant (P <0.05).
Table 3.7 showed that the births of each litter were range from
1 - 4. The average number of civets per litter of all 56 litters was 2.38.
In nature, according to Dang Huy Huynh et al., (2010), civets lay 2 to
4 newborns [7]. According to Nelson (2013), 2-5 newborns, an
average of 3.4 newborn civets /litter [112]. Newborn civets were very
small and weak, unable to stand firmly, with an average weight of
95.16 grams. After a period of 7-10 days, the rim of the ear opened,
from 12-15 days the eyes opened.
At birth 24h 48h 1 week 1 month At Weaning
Weight
at birth
Weight
at
weaning
1 4
2 6
3 3
4 1
X̅ 1 1,86a 96,93 585,36
SD 0.77 7.45 26.85
1 6
2 15
3 14
4 7
X̅ 2 2,55b 94,57 59142
SD 0.92 6.27 19.38
X ̅ 2.38 96.15 90.03 87.22 81.53 80.83 80.83 95.16 590.83
Dong Nai
(n= 14)
22 20 20 17
Place
Number
of
newborn
civets
(con)
Number of
(con) n=56
Live newborn civets
(n / %)
Weight (X̅ , gr)
17 17
96.93 585.36
84.62 76.92 76.92 65.38 65.38 65.38
Thu Duc
(n=42)
107 101 97 93 92
94.57 592.65
100.00 94.39 90.65 86.92 85.98 85.98
92
14
3.2. Research results of some physiological and biochemical
indicators of blood of civets in captivity
3.2.1. Hematological parameters of common palm civets
by gender
The results of the study on the physiological parameters of 186
blood samples from 62 civets (30 males and 32 females) were
presented in Table 3.8.
Table 3.8.Hematological data of common palm civets by gender group
15
3.2.2. Hematological parameters of common palm civets by age
The results of the study on the physiological parameters of 186
blood samples from 62 civets by age were presented in Table 3.9.
Table 3.9. Hematological data of common palm civets by age group
3.2.3. Serum biochemical parameters of common palm civets
The results of blood biochemical parameters by sex and gender
group were shown in Table 3.10. and Table 3.11. Table 3.10. showed
that the total serum protein (TP), globulin, albumin and phosphorus
levels in males were higher than females, the difference was
statistically significant (P <0.05).
16
Table 3.10. Serum biochemical parameter of commom palm civets by sex group
Table 3. 11. Serum biochemical parameter of commom palm civets by age group
17
3.2.4. Urinary biochemical parameters of common palm civets by sex
The results of the study on the urinary biochemical parameters
from 60 civets were presented in Table 3.12.
Table 3.12. Urinary biochemical data of commom palm civets by sex group
18
3.2.5. Urinary biochemical parameters of common palm civets by
age
The results of urine biochemical indexes of civets in the age
group were presented in Table 3.13.
Table 3.13. Urinary biochemical data of commom palm civets by age group
Parameter
3-12 months (n=31)
Mean ± SD Mean ± SD
Weight (g) 1.735±109,1a 3.335 ±84,7b
Body legth (mm) 56,27±0,46a 71,62±0,41b
Urobilinogen (µmol/L) 10,44 ±1,06 10,88 ±1,27
Glucose (mmol/L) Neg1a 0,47±0,22b
Billirubin (µmol/L) 0,46±0,06 0,35±0,05
Ketone (mmol/L) 0,13±0,02 0,17±0,03
Specific Gravity 1,02±0,01 1,02±0,01
Blood (Ery/µL) neg neg
pH 7,55±0,17 7,51±0,52
Protein (g/L) 16,01±1,27 15,88±1,31
Nitrite neg neg
Leukocytes (Leu/µL) 3,82 ± 0,12a 5,35 ± 0,37b
Ascorbic acid (mmol/L) 0,15±0,03 0,17±0,05
K (mmol/L) 173,23±43,12 185,27±51,25
Na (mmol/L) 69,86±11,07a 83,75±16,32b
Cl (mmol/L) 149,58±43,42 157,47±32,24
19
3.4. The results on the changes of sex hormone of female civets in
captivity
3.4.1. The changes of estradiol and progesterone in non-pregnant
civets
3.4.1.1. Faecal estradiol in non-pregnant civets
The concentrations of fecal E2 in non-pregnant civets in our
study ranged from 0.05 to 7.01 µg/g df, with an average of 1.07 ± 0.84
µg/g df and a peak of 3.22 ± 0.64 µg/g df. Although faecal estradiol
value of civets have not been published, faecal estradiol values in other
animals have already been widely used to monitor their sexual
activities. For example, faeal E2 of the Siberian tiger population
ranged from 0.39 to 0.49 µg/g and the mean faecal E2 of Bengal tiger
was 0.45 µg/g, and thoat of Sumatra tiger was 2.36 µg/g [89].
Changes in E2 levels showed a cyclic fertilization. The duration
of each cycle ranged from 26.8-33.1 days with the average of 28.6 ±
2.29 days. This period was comparable with that (27.0 days) of
Siberian tigers [89] and of Bengal tigers (29.3 days) [88], but different
from that of domestic cat (21 days) or leopard (10-20 days)[120].
3.4.1.2. Faecal progesterone in non-pregnant civets
In this study group, non-pregnant female civets’ fecal
progesterone (P4) metabolites levels ranged from 0.15 to 12.32 µg/g
df with the overall mean of 1.72 ± 2.16 µg/g df . For comparison, faecal
progesterone level of Siberian tigers varies from 0.27 to 38.19 µg/g
and that of the Sumatra tigers ranged from 0.09 to 18.52 µg/g, and the
level in Bengal Tigers was 36.05µg/g [89].
Faecal progesterone levels of civets also changed over time.
The peak of faecal progesterone level ranged from 6.03-12.32 µg/g df
with an average of 7.26 ± 1.11 µg/g df. The cycle of change in
progesterone level ranged from 26.6 to 31.0 days with an average of
27.8 ± 2.80 days.
20
3.4.2. The changes of estradiol and progesterone in pregnant civets
During pregnancy, the civets’ faecal P4 level ranged from 6.21
to 23.12 µg/g df with an average of 15.17 ± 5.22 µg/g df. This value
was approximately 5 to 7 times higher (P <0.05) than non-pregnant
and post-fertilization periods. In individuals with conception, P4
increased significantly for a period between 60 and 63 days after
fertilization. Faecal E2 concentration of a juvenile fennel during
pregnancy was relatively lower than that in other periods. Fecal E2
ranged from 0.22 to 1.05 µg/g df with an average of 0.74 ± 0.23 µg/g
df. After parturition, E2 increased and marked the recovery of ovarian
activity from 25-30 days. In contrast, in fetal predisposed individuals,
there was a negligible E2 change (range of 0.35-1.99 µg/g df)
compared to non-pregnant ones (P>0.05), and distinctly lower than
that of the pregnancy period (P <0.05). This result was similar to that
observed in the Pallas' cat, the clouded leopard, Tiger, in these an
increase in estrogen excretion in faeces was not observed during
pregnancy [120].
3.4.3. The changes of estradiol and progesterone in
pseudopregnancy civets
In pseudopregnancy civets, there were also significant
changes in P4 after fertilization, but the change duration was only 26-
30 days. The faecal P4 level at this stage ranged from 8.02 to 11.47
µg/g df with an average of 9.73 ± 1.73 µg/g df. This value was
significantly higher than that of non-pregnant civets but was
significantly lower than those of pregnant animals (P<0.05). In other
studies, leopard cats, clouded leopards, snow leopards and cheetahs
have been reported to have increased duration of P4 contents during
presumed pseudopregnancy [89]. Thus, the main indicator to
distinguish between pregnancy and fake pregnancies is both the
duration and the degree of the increase in the fecal P4.
21
3.5. Results of studying the effects of sex hormones (PMSG, HCG)
on fertility of the civets
3.5.1. The changes of estradiol and progesterone after injecting
sex hormones
Results of monitoring E2 and P4 changes showed that E2 content
in the feces of the civets in the treatments began to increase at day 1
after injection, peaking on day 2 and then gradually decreasing from
day to day. 3rd, the average E2 content of day 2 when peaking in
formula 1 was 2.59 µg/g df, treatment 2 was 2.69 µg / g df and
treatment 3 was 3.16 µg/g df ; in which the highest was in treatment 3.
Thus, when the higher treatment dose (40IU PMSG) increased the
amount of sex hormones in the treated civet group (P <0.05).
Meanwhile in the control group, E2 content in the stool changed over
the days, but this change was not significant (P> 0.05). By the 8th day,
the hormone content in the stool in all treatments decreased to close to
the value before sexual stimulation (day -2 and day -1).
3.5.2. Time appears manifestations and prolonged estrus
In all experimental groups, the average duration of oestrus was
1.1 days (CT3 in group 2) to 2.6 days (CT1 in group 2 and group 3)
after injection of sex hormones. In particular, CT3 always has the
earliest time of estrus (from 1-1.5 days). The duration of oestrus was
strongly correlated with the peak time of E2 (R = 0.82). The duration
of oestrus in all formulas ranged from 2.9 to 3.9 days, of which the
shortest time was in CT1 and the longest was in CT3. This time was
longer than the time of expression of oestrus in the civet without sexual
stimulation during the breeding season (2-3 days). ANOVA analysis
showed that there was a statistical difference (P <0.05) on the duration
of oestrus and duration of oestrus between the formulas in each
experimental civet group. CT3 always has the earliest occurrence of
oestrus and the longest period of oestrus.
22
3.5.3. The results of using hormone formulas on some
reproductive indicators
Results of monitoring reproductive efficiency after injection of
sex hormones were presented in table 3.19.
Table 3. 19. Results of reproductive performance monitoring after injecting sex
hormones
Treatment ĐC CT1 CT 2 CT 3
n 9 15 14 15
Estrus civets Civets 1 12 12 14
% 11,11a 80,00b 85,71c 93,33d
Pregnant civets Civets 1 10 10 12
% 11,11a 66,67b 71,43c 86,67d
Newborn/ litter
(X̅ ± SD) Civets/litter 2±0a
3,04± 0,47b
3,41± 0,66c
3,53± 0,90c
Weight at birth
(X̅ ± SD) (g) 95,5±0
96,15± 2,14
95,72± 2,17
94,02± 3,35
Survivall rate after
48h (%) 100,00a
86,60b
86,35b
90,00b
Survivall rate after 1
month (%) 100,00a
83,57b
82,57b
82,83b
Note: The difference of the characters in the same row is statistically
different (P <0.05), according to the T-test test with the significance
level α = 0, 05.
CONCLUTIONS AND RECOMMENDATIONS
1. Conclusion
1.1. Biological characteristics of the civets in captivity
- Description of morphological characteristics, nutritional
characteristics, weight growth, body length, tail length and chest girth
of the civets in the period of 3-24 months.
- Identified so
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