Efficacy of Estrus Synchronization Protocols in Non-Descript Cattle of Azad Jammu and Kashmir During Non-Breeding and Breeding Seasons

Abstract

A study was undertaken to investigate the effect of three rearing systems (free range, semi-intensive and confinement) on reproductive performance in four varieties of indigenous Aseel chicken (Lakha, Mushki, Peshawari and Sindhi). A total of 192 adult birds (168 females and 24 males), 48 from each variety, were subjected to 3 rearing systems under Randomized Complete Block Design (RCBD) in a factorial experiment. Data regarding reproductive performance [settable eggs (%), fertility (%), hatch of fertile (%), hatchability (%), embryonic mortality (%) and A-grade chicks (%)] were recorded from 31 to 46 weeks of age. The collected data were analyzed by using ANOVA technique. The results demonstrated improved settable eggs, fertility and hatchability in hens reared under confinement and semi-intensive rearing systems. Among different varieties, Sindhi and Peshawari hens depicted higher settable eggs (95.41±0.54) and A-grade chicks (59.36±2.57), respectively. Interaction of rearing systems and varieties clearly indicated maximum settable eggs in both Sindhi and Peshawari hens reared under confinement rearing system. Fertility and hatchability were greater (P≤0.05) in Sindhi hens under semi-intensive rearing system. The highest (P≤0.05) A-grade chicks (63.59±4.68) were found in Peshawari hens under semi-intensive rearing system. From the findings, it can be concluded that confinement and semi-intensive rearing systems remained comparatively better with respect to settable eggs, fertility and hatchability. Both Sindhi and Lakha varieties of Aseel hens can be raised in semi-intensive rearing system as they demonstrated better performance with respect to settable eggs and A-grade chicks.

Comparative Efficacy of Medroxyprogesterone Acetate (Progestin) Sponges with Co-Synch Protocol for Estrus Synchronization in Holstein Friesian Cattle

“…None of the cows in groups D were pregnant (control). Results are consistent with Shahid et al (2021), who found that the 7-day CIDR procedure had a greater pregnancy rate. When heifers were given the CO-Synch+CIDR treatment, Estrada et al (2002) saw a 60% pregnancy rate.…”

“…Variation in estrus response might be associated with the estrus synchronisation protocol used in different groups. Results are consistent with those of Shahid et al (2021), who found that the estrus response in Sahiwal cows was 87% (40/46), while Hassan et al (2017) found that the estrus response in nondescript indigenous cows was 95.45% when recorded with Ovsynch therapy in the field. The outcomes of the CIDR CO-Synch treatments for estrus response are consistent with those of Haider et al (2017), who found 82.5% and 90% estrus responses in CIDR alone and CIDR combined with GnRH treated nondescript cows of Punjab (Pakistan).…”

“…The procedure utilised and duration are related to the difference in duration. The findings of Shahid et al (2021) and Hassan et al (2017), which demonstrated that the beginning of estrus response was greater in the CIDR protocol compared to Ovsynch therapy, are consistent with the results. In this investigation, the pregnant status of 6, 4 and 2 cows from groups B (CIDR for 7 days) and A (CIDR for 12 days) and Group C (Co-Synch), respectively, was determined to be positive.…”

“…The findings of Shahid et al (2021); Shah et al (2023) and Hassan et al (2017), which demonstrated that the beginning of estrus response was greater in the CIDR protocol compared to Ovsynch therapy, are consistent with the results. The results of the present research show that group B (Co-Synch) recorded the longest time for estrus duration, followed by groups A (CIDR for 12 days) and C (CIDR for 7 days), while group D (CIDR for 7 days) recorded the least time for estrus duration (control).…”

Efficacy of Different Synchronization Protocols on Generation of Fertile Estrus, Hormonal Profile, and Conception Rate in Bos indicus Achai Cows

“…Moreover, Eski et al (2021) reported higher fertility parameters and antioxidant defense system in hair goats with combined treatment of PGF2α, GnRH, and intravaginal progesterone. An earlier study (Shahid et al, 2021) reported that protocols of Ovsynch in cows, and CO-Synch+CIDR in heifers may result in better CR/TAI and therefore can be used to enhance the genetic improvement through AI and improve the reproductive parameters.…”