Comparative efficacy of different hormonal interventions for estrus synchronization in North-Western Himalayan Gaddi ewes
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Authors
KIRTI JAMWAL
Abhilashi University, Chailchowk Teh. Chachyot Distt. Mandi (H.P.) 175028
Keywords:
Avikesil-S, Estrus synchronization, Gaddi ewe, GonadotropinAbstract
Estrus synchronization is crucial for reproductive management in seasonal breeders to achieve maximum productivity in the flock. The present study was conducted to compare different hormonal interventions for estrus synchronization in North-Western Himalayan Gaddi ewes reared at Livestock Farm Complex, CSKHPKV, Palampur, India (32.6°N, 76.3°E, altitude of 1290.8 m). A total of 36 adult, healthy, pluriparous Gaddi ewes were randomly assigned to either of three groups (n=6 each) namely progesterone-based protocol (ProEP), ovulation synchronization protocol (GPG) and control (Con) group, respectively in both breeding and non-breeding season. Synchronization protocols were compared in terms of different estrus and fertility related parameters viz. onset of estrus (OE),
duration of estrus (DE), estrus intensity score (EIS), pregnancy rate (PR), conception rate (CR), fecundity rate (FR) and prolificacy (P). Comparatively early onset of estrus (31.6±3.1 v/s 50.3.1±2.8 hr and 26.0±1.1v/s 43.0±3.1) along with significantly higher pregnancy (66.7% v/s 33.3 % and 83.3 v/s 33.3 %) and fecundity rates (66.7 v/s 33.3 and 100.0 % v/s 66.7 %) were observed in ProEP than GPG group during both breeding and non-breeding season. The study indicated that, ProEP protocol can significantly contributes to increased flock productivity, better genetic improvement, and higher profitability for farmers involved in sheep husbandry.
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