Effects of a sustained-release multi-trace element ruminal bolus on sex ratio, reproductive traits and lambs growth in synchronized Afshari ewes
Journal Title: Iranian Journal of Veterinary Science and Technology (IJVST) - Year 2015, Vol 7, Issue 1
Abstract
The objective of the present study was to investigate the effects of a sustained-release multi-trace element ruminal bolus on sex ratio, the reproductive performance and lambs growth of Afshari ewes. Eighty Afshari cycling ewes during breeding season were used in the trial. The animals were synchronized using CIDR for 14 days and assigned into 4 groups including: group 1 (n=20) received a single Ferrobloc bolus four weeks prior to CIDR insertion following 400 IU eCG on CIDR removal, group 2 (n=20) received two boluses four weeks prior to CIDR insertion following 400 IU eCG on CIDR removal, group 3 (n=20) received only 400 IU eCG on CIDR removal and group 4 (n=20; control) received no bolus and no eCG. Growth traits were analyzed using the mixed procedure of SAS. Number of observations (lambing rate, litter size, barren rate and the male / female lamb rate) in different groups was compared using the Chi-Square test. Results showed that ruminal bolus can play an indirect role in skewing sex ratio toward male offsprings. Given 1 or 2 sustained-release multi-trace element ruminal boluses four weeks before synchronization programme using eCG, causes the pregnancy of all ewes. Of the four treatments tested, the 2 boluses+eCG showed superiority on reproductive performancein terms of lambing rate (150%) and litter size (150%) in Iranian Afshari ewes during breeding season. Also, bolus supplementation enhances lamb body weight at birth up to 60 days of age.
Authors and Affiliations
Eslam Abdollahi,Hamid Kohram,Mohammad hossein Shahir,Mohammad hossein Nemati,
Keywords
Related Articles
- EP ID EP722467
- DOI -
- Views 32
- Downloads 1
Evaluation of hormonal treatments for different scenarios of cystic ovarian follicles in dairy cattle
The present study aimed to evaluate the efficacy of different hormonal interventions in the treatment of cystic ovarian follicles (COF) based on different scenarios, including the size of the cyst and the presence of oth...
Serological study of BVDV and BHV-1 infections in industrial dairy herds of Arak, Iran
BVDV and BHV-1 are considered as worldwide, complicated and economically significant infections associated with a range of clinical syndromes in cattle. As clinical syndromes such as pneumonia, diarrhea, abortion and rep...
A survey on serum lipid profile changes in dogs with tail chasing disorder in Iran
Canine compulsive disorder such as tail-chasing is a syndrome of abnormal behaviors that affects many breeds. This disorder may be associated with serum lipid elevations in dogs, so the objective of the present survey wa...
In vitro acaricidal activity of Melia azedarach ripe fruit extract against Hyalomma excavatum (Acari: Ixodidae)
The current study aimed to evaluate the effect of dichloromethane extract of Melia azedarach ripe fruit on larvae and adult females of Hyalomma excavatum at concentrations of 0.25, 0.5, 1, 2, and 4%, using the larval imm...
NetB negative Clostridium perfringens infection associated with acute necrotic enteritis in mynah (Acridotheres tristis), grey partridge (Perdix perdix) and turkey (Meleagris gallopavo)
A nonâenterotoxin (CPE)âproducing Clostridium perfringens type A, associated with enteritis in a mynah (Acridotheres tristis), a grey partridge (Perdix perdix) and a turkey (Meleagris gallopavo) was characterized fro...