Genetic parameters and adjustment factors for birth, weaning, yearling and final weight were estimated for the New Zealand Angus population, fitting an animal model including maternal genetic and permanent environmental effects as additional random effects. Overall, pooled covariance matrices agreed well with those for Australian Angus, though heritability estimates for birth weight were somewh...

One hundred forty-four crossbred yearling steers with an average weight of 841 pounds were used in a 116day experiment. Steers received either 1) no implant, 2) Synovex S ̈, 3) Revalor S ̈, or 4) Synovex Plus ̈. All implanted groups consumed more feed and gained faster and more efficiently than non-implanted steers. There were no significant differences in gain, feed intake or feed efficiency amon...

S ELECTION of breeding ewes is often complicated by environmental factors which tend to obscure genetic merit. Correction or adjustment for measurable effects of environmental factors may increase the effectivehess of selection for meat and wool production. These corrections will also be useful in many experimental studies where it is desirable to minimize the complication of environmental effe...

It is important to realize during an upper respiratory tract evaluation of the weanling and yearling that there are subtle differences from such an evaluation of the adult horse. It can be difficult to predict future pharyngeal and laryngeal function based on one endoscopic exam of the upper respiratory tract of the weanling and yearling. Author’s address: Rood and Riddle Equine Hospital, 2150 ...

Abstract This experiment compared performance and physiological responses of feedlot cattle receiving a saponin containing feed ingredient manufactured from purified extract Yucca schidigera [Micro-Aid (MA); DPI Global, Porterville, CA] which replaced or was fed in conjunction with feed-grade antimicrobials. Yearling, Angus-influenced steers (n = 20) arrived at the experimental on d -19 shrunk ...

Profitability of calf-fed and back-grounding yearling systems was determined based on actual production data and prices from 1996 to 2007, and variability across years was compared. The two systems exhibited similar profits, on average, but the calf-fed system showed less profit variability, suggesting there is more risk inherent in a yearling back-grounding and finishing system. Also, profitab...

To examine the extent of the effect of muscular hypertrophy character in beef of northern-Spanish breeds, animal performance and carcass characteristics of 152 finishing steers from 5 genotypes were studied: 32 yearling bulls from a rustic Asturiana de la Montaña (AM) breed, 96 yearling bulls from Asturiana de los Valles (AV) breed, divided in 3 groups depending on the presence of the gene resp...

The CGC population is a stabilized composite of 1/2 Red Angus, 1/4 Charolais, and 1/4 Tarentaise germplasm. The objectives of this research were to estimate genetic parameters for weight traits of CGC and to evaluate genetic responses resulting from selection based on the following index: I = 365-d weight 3.2(birth weight). Phenotypes evaluated were birth weight (n = 5,083), 200-d weight (n = 4...

The objective of the current study was to evaluate the effects of supplement type and feeding frequency on performance, voluntary forage intake, and physiological responses of yearling beef steers. Twenty-four Brahman x British steers were stratified by initial body weight (BW) and randomly allocated to 12 pens (two steers/pen). Pens were randomly assigned to one of three treatments: 1) molasse...

The study aims to investigate tolerance capability of desert Barki sheep and goats exercise heat stress (EHS) under the hot-dry conditions Coastal Zone Western Desert, in Egypt. Over period from 2009 2014, mature ewes does were exposed (EHS); walking for 7 km July August 12 noon 3 pm (simulating summer grazing on poor pasture). Physiological parameters: rectal temperature (RT), skin (ST), respi...