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Subject: Animal Reproduction and Gynecology × End date: 2002 × Start date: 2002 ×
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    ThesisItemOpen Access
    Effect of prostaglandin-pregnent mare serum gonadotropin combination for enhancing prolificasy in Malabari goats
    (Department of Animal Reproduction, College of Veterinary and animal Sciences, Mannuthy, 2002) Senthilkumar, P; KAU; Balakrishnan, P P
    The object of present Investigation was to evaluate the efficacy of prostaglandin-PMSG combination treatment at different dose levels in order to enhance the fertility and prolificacy of Malabari does. The material used for the study consisted of 48 cycling nulliparous Malabari does of eight to ten months age and body weight 18 to 20 kg, belonging to Kerala Agricultural University Goat farm, Mannuthy. All the experimental does were administered with two doses of cloprostenol (SYNCHROMATE) at the rate of O.Sml intramuscularly 11 days apart. One day prior to the second prostaglandin administration the does were randomly divided into four groups viz. Group I, Il, III and IV with 12 in each group. On the same day group I, 11 and III were administered PMSG (FOLLIGON) intramuscularly at the rate of 200, 400 and 600 IU respectively. Group IV was maintained as control with the prostaglandin treatment alone. After the second dose of prostaglandin all does in group I, 11 and III (100%) showed oestrus and in group IV only 11 does (91.67%) exhibited oestrus. The mean time taken for onset of oestrus in group I, Il, III and IV was 28.00±2.70, 30.00±4.31, 24.00, 43.64±4.36 h respectively. Group IV was significantly different from prostaglandin-PMSG group I, II and III (P < 0.01). The mean duration of oestrus in group I, 11, III and IV was 84.00±6.94, 64.00±7.44, 86.00±7.S2 and 34.91±4.97 h respectively. Group IV was significantly different from group I, IlandIlI (P Mean intensity oestrus score was 11.50±0.49, 12.25±0.33, 14.25±0.72 and 8.82±1.59 respectively in group I, 11, III and IV. Group IV was statistically significant from group I, II and III (P < 0.0 l). All prostaglandin-PMSG treated does exhibited common oestrus signs like wagging of tail, standing to be mounted, vulval redness, vulval oedema and vulval discharge whereas in control group only wagging of tail, vulval redness and vulval oedema noticed. The percentage of conception rate in group I, 11, III and IV was 41.67, 50.00, 33.33 and 45.45 respectively. In prostaglandin-PMSG groups I, 11 and III mean litter size was 1.60±0.25, 1.50±0.43 and 1.50±0.65 respectively but in group IV the same was 1.20±0.20. There was no significant difference between the groups in litter size. However, more litter size with twins and triplets was noticed in prostaglandin- PMSG groups than the control group. In group I, 11 and III mean birth weight was 1.45±0.14, 1.24±0.13 and 1.27±0.18 kg respectively whereas in group IV it was l.62±0.24 kg. There was no significant difference among the groups with respect to the birth weight of kids. The percentage of preweaning mortality of kids in group I, Il, III and IV was 50.00, 44.44, 50.00 and 33.33 respectively. The causes of preweaning mortality were pneumonia, enteritis and other etiological factors such as sudden death of weak born kids. Analysis of the results of present investigation indicated that prostaglandin double dose combined with PMSG at low dose regimen of 200 IV treatment can be used for enhancing the litter size without affecting the uq reproductive efficiency of nulliparous young does. For enhancing the litter size of goat, though requires further detailed investigation, it appears to offer a clear indication on the possibility of hormonally modulated for enhancement of litter size among goats. This might find in potential commercial application in intensive goat production system.