Thursday, November 21, 2024
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മലയാളം
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Animal Husbandry > Goat
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Reproduction
Doe
Age of attainment of puberty
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7 months to 1 year
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Approximate weight at first mating
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15-18 kg
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Age at first mating or insemination
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8 months to 12 months
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Oestrous cycle
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Generally every 18-21 days
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Duration of heat
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14 – 48 hours
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Gestation period
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145 – 156 days
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Age at first kidding
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13 –17 months
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Ideal kidding rate
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3 in 2 consecutive years
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Service period
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45 days
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Minimum dry period
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30 days
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Signs of heat
- Wagging of tail. The frequency of tail movement increases in the presence of males.
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Frequent bleating, more so when the goat is alone.
- Excitement or restlessness.
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Anorexia and lack of interest in feed.
- Drop in milk yield.
- Vulva becomes swollen and oedematous.
- Small quantity of clear discharge from the vagina.
- Doe anxiously goes seeking the buck.
- It remains close to the buck and allows mounting.
- It mounts on other goats
and allows to be mounted by others.
Buck
A young buck may be selected based on the production performance of its dam and/or
its sisters. Their yield must be 1.5 kg per day. Bucks should be masculine and virile
with straight legs and long feet. Preference may be given to the one in the twins
or triplets. Must possess good libido and good semen quality. While selecting male
goats for meat purpose weight at 6 months should not be less than 12 kg. A buck
should be put into service only when it is 10 to 12 months of age.
Age at puberty : 5–7 months.
Age at which kids of different sexes should be separated : 3–5 months.
Age at which training for semen collection can be started : 9 months.
Age upto, which bucks, can be used for breeding purpose : 6–8 years
Gestation period
Symptoms at various stages of gestation in goats
Stage of gestation
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Cervix
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Vagina
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Uterus
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Non pregnant or before 25 days
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No tension of the wall
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Within pelvic cavity no hypertrophy
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Located within pelvic cavity, no clear asymmetry of horns (slightly asymmetric in
some of the does), harder consistency.
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30 days
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-do-
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Within pelvic cavity
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Located at pelvic brim, clear asymmetry of horns with softer and fluid filled consistency.
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45 days
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Slight stretching of the wall
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Located at pelvic brim, slightly hard in consistency but no hypertrophy
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Located in front of the pelvic brim, complete retroversion into the pelvic cavity
possible. Clear distension of uterus, softer in consistency, horns distinguishable
in some cases.
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60 days
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Stretched forward
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At pelvic brim, slightly hypertrophied and soft.
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Located in front of the pelvic brim, complete retroversion possible in about 20%
cases, marked distension of uterus, fluid filled consistency, uterine horns indistinguishable.
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90 days
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Stretched forward
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In front of pelvic brim, slightly hypertrophied and softer.
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Uterus within abdominal cavity, only posterior aspect of uterus palpable. Internal
ballotment of foetus possible in 80% of the cases, placentome slip palpable in 30%.
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120 days
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Slight relaxation of vaginal stretching
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In front of pelvic brim, large and soft, difficult to palpate in 20% cases
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Only posterior aspect of uterus palpable, internal ballotment of foetus possible
and placentome slip palpable in all cases. Foetal parts and large placentomes palpable
in 90% of the animals.
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145 days
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Slight relaxation of vaginal stretching
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In front of pelvic brim, large and soft, difficult to palpate in 20% cases.
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Foetal parts palpable within pelvic and placentomes palpable in 85% of the animals.
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