Effects of age and season on conception rate of Mediterranean Italian Dairy Buffalo (Bubalus bubalis) following oestrus synchronization and fixed-time artificial insemination.

Autor: Otava G; Faculty of Veterinary Medicine, Banat's University of Agricultural Sciences and Veterinary Medicine 'The King Michael I of Romania' from Timisoara, Timis, Romania., Squicciarini S; Bradano River' Dairy Buffalo Farm, Irsina, Italy., Marc S; Faculty of Veterinary Medicine, Banat's University of Agricultural Sciences and Veterinary Medicine 'The King Michael I of Romania' from Timisoara, Timis, Romania., Suici T; Faculty of Veterinary Medicine, Banat's University of Agricultural Sciences and Veterinary Medicine 'The King Michael I of Romania' from Timisoara, Timis, Romania., William Onan G; Animal and Food Science, University of Wisconsin - River Falls, River Falls, Wisconsin, USA., Hutu I; Faculty of Veterinary Medicine, Banat's University of Agricultural Sciences and Veterinary Medicine 'The King Michael I of Romania' from Timisoara, Timis, Romania., Torda I; Faculty of Veterinary Medicine, Banat's University of Agricultural Sciences and Veterinary Medicine 'The King Michael I of Romania' from Timisoara, Timis, Romania., Mircu C; Faculty of Veterinary Medicine, Banat's University of Agricultural Sciences and Veterinary Medicine 'The King Michael I of Romania' from Timisoara, Timis, Romania.
Jazyk: angličtina
Zdroj: Reproduction in domestic animals = Zuchthygiene [Reprod Domest Anim] 2021 Dec; Vol. 56 (12), pp. 1511-1518. Date of Electronic Publication: 2021 Sep 16.
DOI: 10.1111/rda.14013
Abstrakt: The objective of this project was to report the effects of season and age on conception rate amongst Italian Mediterranean Buffalo subjected to an Ovsynch/Resynch (O/R) reproductive management protocol. The study utilized nulliparous (heifers), primiparous buffalo cows (PBC) and multiparous buffalo cows (MBC). The primiparous and multiparous groups were subjected to the synchronization protocol throughout the entire year, but heifers were synchronized and inseminated only during the spring/summer seasons. The conception rate obtained following the OvSynch oestrus synchronization protocol, applied during spring, was 68.4% for heifers, 83.3% for PBC and 67.7% for MBC. The overall total conception rates following the complete O/R protocol were 84.27%, 94.4% and 79%. Conception rates achieved during summer were heifers 52%, PBC 47.2% and MBC 49%, whilst overall conception rates following the full O/R protocol were 72%, 69.8% and 58.2% respectively. In the autumn seasons, PBC conceived 58.9% and MBC 52.1% following initial Ovsynch, which improved to total overall conception rates of 87.5% and 78.7% following the full O/R protocol. Similarly, in the winter season, PBC experienced a conception rate of 47.5% following Ovsynch and 72.5% after a follow-up Resynch. MBC experienced 60.0% and 74.4% conception following Ovsynch and full O/R, respectively, during winter. Total conception rates during all seasons were quite acceptable following the O/R protocol. There was a significant decrease from spring to summer in conception rate for all parity groups, but heifers were not a severely affected as older buffalo cows. This finding agrees with that of other investigators indicating that heifer fertility is not as negatively impacted by long photoperiod and higher ambient temperature as that of older animals. The O/R protocol as utilized in this study is an effective means of reproductive management for dairy buffalo cows and is effective for improving fertility during out-of-season breeding.
(© 2021 USAMVB Timisoara. Reproduction in Domestic Animals published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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