Scrotal Thermography as a Tool for Predicting Semen Quality and Natural-MatingFertility in Young Beef Bulls
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منابع مشابه
Effects of dietary energy on scrotal surface temperature, seminal quality, and sperm production in young beef bulls.
The objective of this study was to determine the effect of dietary energy, breed (British vs Continental x British crosses), and their interactions on scrotal surface temperature (SST), seminal quality, and sperm production in bulls. This experiment, replicated over 2 yr, included 72 Angus, Angus x Simmental, or Hereford x Simmental bulls fed either a moderate- (100% forage) or high-energy (80%...
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Semen characteristics were evaluated every 2 wk from 7 through 13 mo of age in 31 beef bulls representing six breed groups (Hereford, Angus, Hereford x Angus crossbreeds, Angus x Hereford crossbreds, Red Poll and Brown Swiss). Breeds differed in age at puberty, defined as the age at which an ejaculate was first obtained that contained a minimum of 50 x 10(6) total spermatozoa with at least 10% ...
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The present study was undertaken to determine the fertility soundness of unselected bulls used for breeding based on a standard breeding soundness evaluation technique (BSE) and trans-scrotal ultrasonography (TSU). A total of 8 bulls, with the mean age of 51⁄2 years (ranged from 31⁄2 8 years) and the mean weight of 651.5kg (ranged from 480-840 kg) were evaluated. Three bulls were Friesian Sahiw...
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quality semen can be produced ulls of any age, but recovery in 3-6 months was found in nearly half of such bulls that could be retested. Semen samples were obtained from 460 bulls 15-24 months of age, from 53 bulls 3 6 years of age, and from 12 bulls 2-6 years of age, used for breeding. The test on the first two groups is recorded in the table in the first and second columns. Of the 460 young b...
متن کاملImpact of selection for residual feed intake on breeding soundness and reproductive performance of bulls on pasture-based multisire mating.
There is concern in the beef industry that selecting bulls for feed efficiency based on residual feed intake (RFI) may have a negative impact on bull reproductive performance and fertility. Here we investigated the impact of selection of bulls for low RFI on breeding soundness evaluation (BSE), reproductive performance, and fertility of bulls under natural service in multisire mating groups on ...
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